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  • 1.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Functional Dendritic Materials using Click Chemistry: Synthesis, Characterizations and Applications2008Doctoral thesis, comprehensive summary (Other scientific)
    Abstract [en]

    The need for new improved materials in cutting edge applications is constantly inspiring researchers to developing novel advanced macromolecular structures. A research area within advanced and complex macromolecular structures is dendrimers and their synthesis. Dendrimers consist of highly dense and branched structures that have promising properties suitable for biomedical and electrical applications and as templating materials. Dendrimers provide full control over the structure and property relationship since they are synthesized with unprecedented control over each reaction step. In this doctoral thesis, new methodologies for dendrimer synthesis are based on the concept of click chemistry in combination with traditional chemical reactions for dendrimer synthesis.

    This thesis discusses an accelerated growth approach, dendrimers with internal functionality, concurrent reactions and their applications.

    An accelerated growth approach for dendrimers was developed based on AB2- and CD2-monomers. These allow dendritic growth without the use of activation or deprotection of the peripheral end-groups. This was achieved by combining the chemoselective nature of click chemistry and traditional acid chloride reactions.

    Dendrimers with internal azide/alkyne functionality were prepared by adding AB2C monomers to a multifunctional core. Dendritic growth was obtained by employing carbodiimide mediated chemistry. The monomers carry a pendant C-functionality (alkyne or azide) that remains available in the dendritic interior resulting in dendrimers with internal and peripheral functionalities.

    The orthogonal nature of click chemistry was utilized for the simultaneous assembly of monomers into dendritic structures. Traditional anhydride chemistry and click chemistry were carried out concurrently to obtain dendritic structures. This procedure allows synthesis of dendritic structures using fewer purification steps.

    Thermal analyses on selected dendrimers were carried out to verify their use as templates for the formation of honeycomb membranes. Additionally, a light emitting dendrimer was prepared by coupling of azide functional dendrons to an alkyne functional cyclen core. A Europium ion was incorporated into the dendrimer core, and photophysical measurements on the metal containing dendrimer revealed that the formed triazole linkage possesses a sensitizing effect.

  • 2.
    Antoni, Per
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hed, Yvonne
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nordberg, Axel
    KTH, School of Technology and Health (STH), Neuronic Engineering (Closed 20130701).
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering (Closed 20130701).
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Bifunctional Dendrimers: From Robust Synthesis and Accelerated One-Pot Postfunctionalization Strategy to Potential Applications2009In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 48, no 12, p. 2126-2130Article in journal (Refereed)
  • 3.
    Antoni, Per
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hed, Yvonne
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nordberg, Axel
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    One-pot dendritic growth and post-functionalization of multifunctional dendrimers: Synthesis and application2009Manuscript (preprint) (Other academic)
  • 4.
    Antoni, Per
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Vamvounis, George
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nyström, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Lindgren, Mikael
    Norwegian Univ Sci & Technol, Dept Phys.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Europium confined cyclen dendrimers with photophysically active triazoles2008In: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. 18, no 22, p. 2545-2554Article in journal (Refereed)
    Abstract [en]

    Dendrimers up to the fourth generation (G1-G4) were successfully synthesized via the efficient copper catalyzed 1,3-dipolar cycloaddition between primary alkynes and azides (CuAAC), also referred to as a click reaction. The synthetic protocol involved the preparation of presynthesized dendron wedges that subsequently were attached to a tetra-valent alkyne functional cyclen core. These constructed structures integrated stable triazole groups "intra-locked'' between the cyclen and dendron wedges. The incorporation of a lanthanide metal ion, europium, into the interior of all cyclen dendrimers was monitored by FT-IR. Interestingly, the photophysical results showed that the proximate triazole not only acts as a stable linker but also as a sensitizers, transferring its singlet-singlet excitation in the ultraviolet region (270-290 nm) to the partially filled luminescent lanthanide 4f shell. An increase of luminescence decay time from the lanthanide D-5(0) -> F-7(2) emission was observed with increasing dendrimer size, indicating that the shielding effect of the dendron wedges is important for the relaxation of the photo-excitation and energy transfer. To the best of our knowledge, this is the first time a set of dendron wedges have successfully been attached to a cyclen metal ion cage via the versatile click reaction. Furthermore, the produced triazoles intra-locked in close proximity to the macrocycle core elucidated an interesting photophysical function.

  • 5.
    Antoni, Per
    et al.
    KTH, School of Chemical Science and Engineering (CHE).
    Nystrom, Daniel
    KTH, School of Chemical Science and Engineering (CHE). KTH, Royal Inst Technol, Sch Chem Sci & Engn, SE-10044 Stockholm, Sweden..
    Hawker, Craig J.
    Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA..
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE).
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE).
    POLY 558-Synthesis of click/ester and click/ether dendrimers based on AB2-and CD2-monomers2007In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 234Article in journal (Other academic)
  • 6.
    Antoni, Per
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hawker, Craig
    Univ Calif Santa Barbara, Mat Res Lab.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    A chemoselective approach for the accelerated synthesis of well-defined dendritic architectures2007In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, no 22, p. 2249-2251Article in journal (Refereed)
    Abstract [en]

    A chemoselective and layered growth approach has been developed for the synthesis of dendrimers, combining Click chemistry with traditional esterification/etherification reactions, without the need for activation steps and with excellent overall yields.

  • 7.
    Antoni, Per
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE).
    Ropponen, Jarmo
    KTH, School of Chemical Science and Engineering (CHE).
    Lundberg, Pontus
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Click chemistry as a tool for accelerated and one-pot synthesis of dendrimers: thermal study and application2007Manuscript (preprint) (Other academic)
    Abstract [en]

    Dendrons, dendrimers and linear polymers have been synthesized using click chemistry in combination with anhydride chemistry and atom transfer radical polymerization, ATRP. Functional materials were obtained in multigram scale using these orthogonal chemistries simultaneous.

  • 8.
    Antoni, Per
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Robb, Maxwell J.
    Campos, Luis
    Montanez, Maria
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hawker, Craig J.
    Pushing the Limits for Thiol-Ene and CuAAC Reactions: Synthesis of a 6th Generation Dendrimer in a Single Day2010In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 43, no 16, p. 6625-6631Article in journal (Refereed)
    Abstract [en]

    Dendrimer synthesis should not be tedious and time-consuming. By utilizing an AB(2)-CD2 approach and having orthogonal, "clickable" groups on each monomer, the time for dendrimer assembly can be drastically reduced. This was shown by preparation of a sixth generation dendrimer from starting monomer units in a single day.

  • 9.
    Fogelström, Linda
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    UV-curable hyperbranched nanocomposite coatings2006In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 55, p. 284-290Article in journal (Refereed)
    Abstract [en]

    Nanoparticles have been used to reinforce polymer matrices since the late 1980s, with promising results. Hyperbranched polymers are densely branched molecules with a globular structure, leading to lower viscosity and many end-groups, creating property-designing opportunities. Here, the two research areas, nanocomposites and hyperbranched polymers, were combined to investigate the possibility of creating a nanocomposite resin, in order to prepare a UV-curable coating system. Nanocomposites were prepared from the hyperbranched polyester Boltorn (R) H30, acrylated to 30% and 70%, and the unmodified layered silicate Na(+)montmorillonite, added both before and after the acrylation of Boltorn (R) H30. Films prepared from 30% acrylated Boltorn (R) H30 with clay added after the acrylation, having a mainly exfoliated structure according to X-ray and TEM, exhibited the largest property improvement, compared with the unfilled film. These property improvements comprised a harder surface, better scratch resistance, better adhesion to metal substrates and a small improvement in flexibility.

  • 10.
    Hansson, Susanne
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Bergenudd, Helena
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Assessing initiator content by cleavage of polymers grafted via ARGET ATRP2011In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 242Article in journal (Refereed)
  • 11.
    Hansson, Susanne
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Bergenudd, Helena
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Nuclear Chemistry.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Selective cleavage of polymer grafts from solid surfaces: assessment of initiator content and polymer characteristics2011In: POLYM CHEM, ISSN 1759-9954, Vol. 2, no 3, p. 556-558Article in journal (Refereed)
    Abstract [en]

    A novel initiator for atom transfer radical polymerization, also allowing for selective cleavage of polymer grafts, was designed and immobilized on a solid substrate. After cleavage, the initiator content was determined by utilizing Ellman's reagent and the cleaved polymer grafts were isolated and characterized by size exclusion chromatography.

  • 12.
    Hed, Yvonne
    et al.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Antoni, Per
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Montanez, Maria I.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Hult, Anders
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Malkoch, Michael
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Bifunctional dendritic structures based on AB(2)C monomers2009In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 238Article in journal (Other academic)
  • 13.
    Hult, Anders
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Dendrimers with interior and exterior functionalities comprising of azide or alkyne groups for post- functionalization by huisgen click cycloaddition2008Patent (Other (popular science, discussion, etc.))
    Abstract [en]

    Novelty: A dendritic polymer comprising a core and repeating units, is new. Every repeating unit is bound to other unit(s) with bond(s) consisting of an ester, amide, thioether, ether, urethane, amine or imine.Use: The dendritic polymer is used for drug delivery systems, tissue engineering, data storage devices, markers for imaging, diagnostics, vaccines, phototherapeutics, optical devices, semiconductor, bioactive hydrogels and/or catalysts; for manufacture of a particle and a hydrogel (claimed); and for coatings, polyfunctional initiators for controlled radical polymerization or living free-radical polymerization techniques, ring-opening metathesis polymerization and ring-opening polymerization, dental and other composite materials, additives to control viscosity, rheology, solubility and stabilizing capacity, hybrid organic-inorganic materials, water-soluble materials, amphiphilic architectures, well-defined building blocks for precise architectural control, deposition of dendrimers on solid surfaces, dispersing agents for nanoparticles, dendrimer vehicles for encapsulation and/or delivery, and dendrimer scaffolds. The particle is used in encapsulation of low molecular compounds such as potent drugs, chelating species and fluorescent dyes.Advantage: The dendritic polymer can be functionalized both in the interior and in the exterior. It is possible to use a one-pot growth of dendritic polymer. There is provided the possibility to have more functional groups in a dendritic polymer compared to conventional polymer. When comparing the number of functional groups of a dendrimer based on A'B' x C' y -monomers with a traditional dendrimer based A'B' x -monomers, it is evident that the intrinsic functionality provides a larger number of available functional groups for post-modification. There is provided the possibility of a synthesis which is very robust, can be performed in various solvents, performed at both ambient and elevated temperatures, performed at atmospheric pressure as well as elevated, performed in a variety of gases including oxygen, nitrogen or argon. The synthesis has a high yield making the manufacture economical. There is the possibility to exclude an activation step prior to post-functionalization of a dendritic polymer. There is provided the possibility to add different types of functional groups simultaneously both to inner layer and/or to the outer layer.

  • 14.
    Lindqvist, Josefina
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Östmark, Emma
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Carlmark, Anna
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Johansson, Mats
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva E.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Intelligent Dual-Responsive Cellulose Surfaces via Surface-Initiated ATRP2008In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 9, no 8, p. 2139-2145Article in journal (Refereed)
    Abstract [en]

    Novel thermo-responsive cellulose (filter paper) surfaces of N-isopropylacrylamide (NIPAAm) and pH-responsive cellulose surfaces of 4-vinylpyridine (4VP) have been achieved via surface-initiated ATRP. Dual-responsive (pH and temperature) cellulose surfaces were also obtained through the synthesis of block-copolymer brushes of PNIPAAm and P4VP. With changes in pH and temperature, these "intelligent" surfaces showed a reversible response to both individual triggers, as indicated by the changes in wettability from highly hydrophilic to highly hydrophobic observed by water contact angle measurements. Adjusting the composition of the grafted block-copolymer brushes allowed for further tuning of the wettability of these "intelligent" cellulose surfaces.

  • 15.
    Lindqvist, Josefina
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Östmark, Emma
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Johansson, Mats
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Dual-Responsive Bio-Fiber Surfaces via ATRPIn: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835Article in journal (Refereed)
  • 16.
    Lundberg, Pontus
    et al.
    KTH, School of Chemical Science and Engineering (CHE).
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE).
    Fogelström, Linda
    KTH, School of Chemical Science and Engineering (CHE).
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE).
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE).
    POLY 660-Controlled design of amphiphilic block-copolymers using ring-opening polymerization and click chemistry2007In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 234Article in journal (Other academic)
  • 17.
    Malmström, Eva
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Lindqvist, J.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Östmark, Emma
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Johansson, Mats
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    ATRP as a tool to obtain functional surface modifications on bio-fiber surfaces. Dual responsive grafts2007In: Polymer Preprints, ISSN 0032-3934, Vol. 48, no 2, p. 173-174Article in journal (Refereed)
  • 18.
    Malmström, Eva
    et al.
    KTH, School of Chemical Science and Engineering (CHE).
    Lindqvist, Josefina
    KTH, School of Chemical Science and Engineering (CHE).
    Nystrom, Daniel
    KTH, School of Chemical Science and Engineering (CHE).
    Ostmark, Emma
    KTH, School of Chemical Science and Engineering (CHE).
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE).
    Johansson, Mats
    KTH, School of Chemical Science and Engineering (CHE).
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE).
    POLY 597-ATRP as a tool to obtain functional surface modifications on biofiber based surfaces: Dual-responsive grafts2007In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 234Article in journal (Other academic)
  • 19.
    Nordberg, Axel
    et al.
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Fibre reinforced Thiol-Ene patch fixation of bone fracturesManuscript (preprint) (Other academic)
  • 20.
    Nordberg, Axel
    et al.
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Montanez, Maria I.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Coating Technology.
    Highly Adhesive Phenolic Compounds as Interfacial Primers for Bone Fracture Fixations2010In: ACS APPLIED MATERIALS & INTERFACES, ISSN 1944-8244, Vol. 2, no 3, p. 654-657Article in journal (Refereed)
    Abstract [en]

    Bone fractures are today scabilized with screws and metal plates. More complicated Fractures require alternative treatments that exclude harsh surgical conditions. By adapting the benign and UV initiated thiol-ene reaction, we efficiently fabricated triazine-based, fiber-reinforced adhesive patches within 2 s. To enhance their bone adhesion properties, we found that a pre-treatment step of bone surfaces with phenolic dopamine and poly(parahydroxystyrene) compounds was successful. The latter display the greatest E-module of 3.4 MPa in shear strength. All patches exhibited low cytotoxicity and can therefore find potential use in future treatments of bone fractures.

  • 21.
    Nystrom, Daniel
    et al.
    KTH, School of Chemical Science and Engineering (CHE).
    Lindqvist, Josefina
    KTH, School of Chemical Science and Engineering (CHE).
    Östmark, Emma
    KTH, School of Chemical Science and Engineering (CHE).
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE).
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE).
    Johansson, Mats
    KTH, School of Chemical Science and Engineering (CHE).
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE).
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE).
    POLY 598-Superhydrophobic biofiber surfaces obtained via ATRP and postfunctionalization reactions2007In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 234Article in journal (Other academic)
  • 22.
    Nyström, Andreas
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Furo, Istvan
    KTH, School of Chemical Science and Engineering (CHE), Chemistry.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Unal, Kerem
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Vamvounis, George
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hawker, Craig
    Wooley, Karen
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Characterization of Poly(norbornene) Dendronized Polymers Prepared by Ring-Opening Metathesis Polymerization of Dendron Bearing Monomers2006In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 39, no 21, p. 7241-7249Article in journal (Refereed)
    Abstract [en]

    The preparation and characterization of a series of first to fourth generation dendronized poly-(norbornene)s are presented. The monomers were synthesized in a divergent fashion from 5-norbornene-2-methanol, utilizing the acetonide protected anhydride of 2,2-bis(methylol)propionic acid. The norbornenyl bearing dendrons were polymerized by ring-opening metathesis polymerization, and it was found that the Grubbs' first generation catalyst resulted in polymers with lower polydispersity compared to the materials obtained when employing the second generation catalyst. Two series of first to fourth generation polymers were characterized by DSC, SEC, and dynamic rheological measurements. In addition, it was found that the fourth generation material could form regular, porous membranes and birefringent fibers. The membranes were characterized with atomic force and optical microscopy. The birefringent fibers were analyzed with X-ray diffraction, polarized FTIR, and polarized optical microscopy.

  • 23.
    Nyström, Daniel
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Holdcroft, Steven
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Vamvounis, George
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Solution-processed superhydrophobic conjugated polymer films2012In: Soft Matter, ISSN 1744-683X, E-ISSN 1744-6848, Vol. 8, no 21, p. 5753-5755Article in journal (Refereed)
    Abstract [en]

    The interfacial properties of solution-processed conjugated polymer films are investigated. Their surface roughness was controlled by varying the humidity during the film deposition and mechanical exfoliation. A superhydrophobic film was obtained from a rough film of a partially fluorinated conjugated polymer. These films would be beneficial towards robust organic electronic devices.

  • 24.
    Nyström, Daniel
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva E.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Johansson, Mats K. G.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Whittaker, Michael
    Chemistry Department, University of Queensland.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Highly-ordered hybrid organic-inorganic isoporous membranes from polymer modified nanoparticles2005In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 26, no 7, p. 524-528Article in journal (Refereed)
    Abstract [en]

    Organic-inorganic hybrid materials consisting of nanosized silica particles with surface grafted PS or PS-b-PMMA were synthesized using ATRP. These hybrid materials were used in the fabrication of highly-ordered isoporous membranes. Optical characterization revealed that the membranes consisted of hexagonally ordered pores of uniform size. The combination of an open pore structure and high surface area makes isoporous membranes into materials of high interest in fields as biotechnology and photonics.

  • 25.
    Nyström, Daniel
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Östmark, Emma
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nordqvist, David
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Örtegren, Jonas
    Fogelström, Linda
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva E.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Lindgren, Mikael
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Honeycomb Patterned Membranes from Polymer Modified Silica NanoparticlesManuscript (Other academic)
  • 26.
    Nyström, Daniel
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Lindqvist, J.
    Östmark, Emma
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malkoch, Michael
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Johansson, Mats
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Superhydrohobic bio-fibre surfaces obtained via ATRP and postfunctioalizations reactions2007Manuscript (preprint) (Other academic)
  • 27.
    Nyström, Daniel
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Lindqvist, Josefina
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Östmark, Emma
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Carlmark, Anna
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva E.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Bouncing Water Droplets on Superhydrophobic Cellulose SurfacesIn: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501Article in journal (Other academic)
  • 28.
    Nyström, Daniel
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Lindqvist, Josefina
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Östmark, Emma
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Johansson, Mats
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Superhydrophobic and self-cleaning bio-fiber surfaces via ATRP and subsequent postfunctionalization2009In: ACS applied materials & interfaces, ISSN 1944-8244, Vol. 1, no 4, p. 816-823Article in journal (Refereed)
    Abstract [en]

    Superhydrophobic and self-cleaning cellulose surfaces have been obtained via surface-confined grafting of glycidyl methacrylate using atom transfer radical polymerization combined with postmodification reactions. Both linear and branched graft-on-graft architectures were used for the postmodification reactions to obtain highly hydrophobic bio-fiber surfaces by functionalization of the grafts with either poly(dimethylsiloxane), perfluorinated chains, or alkyl chains, respectively, Postfunctionalization using alkyl chains yielded results similar to those of surfaces modified by perfluorination, in terms of superhydrophobicity, self-cleaning properties, and the stability of these properties over time. in addition, highly oleophobic surfaces have been obtained when modification with perfluorinated chains was performed.

  • 29.
    Vamvounis, George
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nystrom, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Lindgren, Mikael
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Formation and properties of isoporous films composed of polymer semiconductors2006In: Optical Materials in Defence Systems Technology III / [ed] rote, JG; Kajzar, F; Lindgren, M, BELLINGHAM, WA: SPIE-INT SOC OPTICAL ENGINEERING , 2006, Vol. 6401, p. U64-U70Conference paper (Refereed)
    Abstract [en]

    Ordered hexagonal arrays of isoporous films prepared from poly(9,9'-dihexylfluorene) and polystyrene grafted silica nanoparticles (Si-graft-PS) are presented. These close packed arrays were formed in areas of many square millimeters. The pore size varied from 2.9 - 8.5 mu m, depending on the concentration of Si-graft-PS and the processing conditions. Solid state photoluminescence resulted in a significant red shift of up to 30 nm in these films compared to conventional processing techniques. These differences are attributed to induced aggregation of the polymers caused by polymer- solvent interactions. Interfacial properties were investigated, and it was found that hydrophobic surfaces (contact angles of up to 129 degrees) were prepared because of high surface roughness. These ordered porous polymer films may find use in microelectronic and bio- and/or chemical sensor applications.

  • 30.
    Vamvounis, George
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Nyström, Daniel
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Antoni, Per
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Lindgren, Mikael
    Department of Physics, Norwegian University of Science and Technology (NTNU).
    Holdcroft, Steven
    Department of Chemistry, Simon Fraser University.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Self-assembly of poly(9,9 '-dihexylfluorene) to form highly ordered isoporous films via blending2006In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 22, no 9, p. 3959-3961Article in journal (Refereed)
    Abstract [en]

    Highly ordered hexagonal arrays of isoporous films prepared from poly(9,9'-dihexylfluorene) and polystyrene-grafted silica nanoparticles (Si-graft-PS) are presented. These close-packed arrays were formed in areas of many square millimeters. The pore size varied from 3.6 to 8.5 mu m, depending on the concentration of Si-graft-PS and the processing conditions. Solid-state photoluminescence resulted in a significant red shift of up to 30 nm in these films compared to that in conventional processing techniques. These differences are attributed to enhanced aggregation of the polymers caused by polymer-solvent interactions. These highly ordered polymer films may find use in microelectronic and biological and/or chemical sensor applications.

1 - 30 of 30
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