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Publikationer (10 of 24) Visa alla publikationer
Erlandsson, J., Francon, H., Marais, A., Granberg, H. & Wågberg, L. (2019). Cross-Linked and Shapeable Porous 3D Substrates from Freeze-Linked Cellulose Nanofibrils. Paper presented at Symposium on Rational Design of Multifunctional Renewable-Resourced Materials held during the ACS National Meeting, AUG 19-23, 2018, Boston, MA. Biomacromolecules, 20(2), 728-737
Öppna denna publikation i ny flik eller fönster >>Cross-Linked and Shapeable Porous 3D Substrates from Freeze-Linked Cellulose Nanofibrils
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2019 (Engelska)Ingår i: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 20, nr 2, s. 728-737Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Chemically cross-linked highly porous nano cellulose aerogels with complex shapes have been prepared using a freeze-linking procedure that avoids common post activation of cross-linking reactions and freeze-drying. The aerogel shapes ranged from simple geometrical three-dimensional bodies to swirls and solenoids. This was achieved by molding or extruding a periodate oxidized cellulose nanofibril (CNF) dispersion prior to chemical cross-linking in a regular freezer or by reshaping an already prepared aerogel by plasticizing the structure in water followed by reshaping and locking the aerogel into its new shape. The new shapes were most likely retained by new cross-links formed between CNFs brought into contact by the deformation during reshaping. This self-healing ability to form new bonds after plasticization and redrying also contributed to the mechanical resilience of the aerogels, allowing them to be cyclically deformed in the dry state, reswollen with water, and redried with good retention of mechanical integrity. Furthermore, by exploiting the shapeability and available inner structure of the aerogels, a solenoid-shaped aerogel with all surfaces coated with a thin film of conducting polypyrrole was able to produce a magnetic field inside the solenoid, demonstrating electromagnetic properties. Furthermore, by biomimicking the porous interior and stiff exterior of the beak of a toucan bird, a functionalized aerogel was created by applying a 300 mu m thick stiff wax coating on its molded external surfaces. This composite material displayed a 10-times higher elastic modulus compared to that of the plain aerogel without drastically increasing the density. These examples show that it is possible to combine advanced shaping with functionalization of both the inner structure and the surface of the aerogels, radically extending the possible use of CNF aerogels.

Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2019
Nationell ämneskategori
Materialkemi
Identifikatorer
urn:nbn:se:kth:diva-245946 (URN)10.1021/acs.biomac.8b01412 (DOI)000458937200016 ()30394086 (PubMedID)2-s2.0-85057560598 (Scopus ID)
Konferens
Symposium on Rational Design of Multifunctional Renewable-Resourced Materials held during the ACS National Meeting, AUG 19-23, 2018, Boston, MA
Anmärkning

QC 20190312

Tillgänglig från: 2019-03-12 Skapad: 2019-03-12 Senast uppdaterad: 2019-09-13Bibliografiskt granskad
Reid, M. S., Erlandsson, J. & Wågberg, L. (2019). Incorporation of cellulose nanocrystals into polyamide nanocomposites with controlled architecture via interfacial polymerization. Paper presented at National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL. Abstracts of Papers of the American Chemical Society, 257
Öppna denna publikation i ny flik eller fönster >>Incorporation of cellulose nanocrystals into polyamide nanocomposites with controlled architecture via interfacial polymerization
2019 (Engelska)Ingår i: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 257Artikel i tidskrift, Meeting abstract (Övrigt vetenskapligt) Published
Ort, förlag, år, upplaga, sidor
AMER CHEMICAL SOC, 2019
Nationell ämneskategori
Pappers-, massa- och fiberteknik
Identifikatorer
urn:nbn:se:kth:diva-257610 (URN)000478860502418 ()
Konferens
National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL
Anmärkning

QC 20190918

Tillgänglig från: 2019-09-18 Skapad: 2019-09-18 Senast uppdaterad: 2019-09-18Bibliografiskt granskad
Wang, Z., Ouyang, L., Tian, W., Erlandsson, J., Marais, A., Tybrandt, K., . . . Hamedi, M. (2019). Layer-by-Layer Assembly of High-Performance Electroactive Composites Using a Multiple Charged Small Molecule. Langmuir, 35(32), 10367-10373
Öppna denna publikation i ny flik eller fönster >>Layer-by-Layer Assembly of High-Performance Electroactive Composites Using a Multiple Charged Small Molecule
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2019 (Engelska)Ingår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 35, nr 32, s. 10367-10373Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Layer-by-layer (LbL) assembly is a versatile tool for fabricating multilayers with tailorable nanostructures. LbL, however, generally relies on polyelectrolytes, which are mostly insulating and induce large interlayer distances. We demonstrate a method in which we replace polyelectrolytes with the smallest unit capable of LbL self-assembly: a molecule with multiple positive charges, tris(3-aminopropyl)amine (TAPA), to fabricate LbL films with negatively charged single-walled carbon nanotubes (CNTs). TAPA introduces less defects during the LbL build-up and results in more efficient assembly of films with denser micromorphology. Twenty bilayers of TAPA/CNT showed a low sheet resistance of 11 k Omega, a high transparency of 91% at 500 nm, and a high electronic conductivity of 1100 S/m on planar substrates. We also fabricated LbL films on porous foams with a conductivity of 69 mS/m and used them as electrodes for supercapacitors with a high specific capacitance of 43 F/g at a discharging current density of 1 A/g.

Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2019
Nationell ämneskategori
Annan kemi
Identifikatorer
urn:nbn:se:kth:diva-257441 (URN)10.1021/acs.langmuir.9b01587 (DOI)000480827000013 ()31322359 (PubMedID)2-s2.0-85071226711 (Scopus ID)
Anmärkning

QC 20190903

Tillgänglig från: 2019-09-03 Skapad: 2019-09-03 Senast uppdaterad: 2019-09-03Bibliografiskt granskad
Tian, W., VahidMohammadi, A., Reid, M. S., Wang, Z., Ouyang, L., Erlandsson, J., . . . Hamedi, M. (2019). Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose. Advanced Materials, Article ID 1902977.
Öppna denna publikation i ny flik eller fönster >>Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose
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2019 (Engelska)Ingår i: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, artikel-id 1902977Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The family of two-dimensional (2D) metal carbides and nitrides, known as MXenes, are among the most promising electrode materials for supercapacitors thanks to their high metal-like electrical conductivity and surface-functional-group-enabled pseudocapacitance. A major drawback of these materials is, however, the low mechanical strength, which prevents their applications in lightweight, flexible electronics. A strategy of assembling freestanding and mechanically robust MXene (Ti3C2Tx) nanocomposites with one-dimensional (1D) cellulose nanofibrils (CNFs) from their stable colloidal dispersions is reported. The high aspect ratio of CNF (width of approximate to 3.5 nm and length reaching tens of micrometers) and their special interactions with MXene enable nanocomposites with high mechanical strength without sacrificing electrochemical performance. CNF loading up to 20%, for example, shows a remarkably high mechanical strength of 341 MPa (an order of magnitude higher than pristine MXene films of 29 MPa) while still maintaining a high capacitance of 298 F g(-1) and a high conductivity of 295 S cm(-1). It is also demonstrated that MXene/CNF hybrid dispersions can be used as inks to print flexible micro-supercapacitors with precise dimensions. This work paves the way for fabrication of robust multifunctional MXene nanocomposites for printed and lightweight structural devices.

Ort, förlag, år, upplaga, sidor
Wiley-VCH Verlagsgesellschaft, 2019
Nyckelord
2D titanium carbide, MXenes, nanocellulose, nanocomposites, supercapacitors
Nationell ämneskategori
Materialkemi
Identifikatorer
urn:nbn:se:kth:diva-257440 (URN)10.1002/adma.201902977 (DOI)000482085200001 ()31408235 (PubMedID)
Anmärkning

QC 20190905

Tillgänglig från: 2019-09-05 Skapad: 2019-09-05 Senast uppdaterad: 2019-09-05Bibliografiskt granskad
Tian, W., VahidMohammadi, A., Reid, M. S., Wang, Z., Ouyang, L., Erlandsson, J., . . . Hamedi, M. (2019). Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose. Advanced Materials, Article ID 1902977.
Öppna denna publikation i ny flik eller fönster >>Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose
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2019 (Engelska)Ingår i: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, artikel-id 1902977Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The family of two-dimensional (2D) metal carbides and nitrides, known as MXenes, are among the most promising electrode materials for supercapacitors thanks to their high metal-like electrical conductivity and surface-functional-group-enabled pseudocapacitance. A major drawback of these materials is, however, the low mechanical strength, which prevents their applications in lightweight, flexible electronics. A strategy of assembling freestanding and mechanically robust MXene (Ti3C2Tx) nanocomposites with one-dimensional (1D) cellulose nanofibrils (CNFs) from their stable colloidal dispersions is reported. The high aspect ratio of CNF (width of approximate to 3.5 nm and length reaching tens of micrometers) and their special interactions with MXene enable nanocomposites with high mechanical strength without sacrificing electrochemical performance. CNF loading up to 20%, for example, shows a remarkably high mechanical strength of 341 MPa (an order of magnitude higher than pristine MXene films of 29 MPa) while still maintaining a high capacitance of 298 F g(-1) and a high conductivity of 295 S cm(-1). It is also demonstrated that MXene/CNF hybrid dispersions can be used as inks to print flexible micro-supercapacitors with precise dimensions. This work paves the way for fabrication of robust multifunctional MXene nanocomposites for printed and lightweight structural devices.

Ort, förlag, år, upplaga, sidor
WILEY-V C H VERLAG GMBH, 2019
Nyckelord
2D titanium carbide, MXenes, nanocellulose, nanocomposites, supercapacitors
Nationell ämneskategori
Polymerkemi
Identifikatorer
urn:nbn:se:kth:diva-257809 (URN)10.1002/adma.201902977 (DOI)000482085200001 ()31408235 (PubMedID)2-s2.0-85070724702 (Scopus ID)
Anmärkning

QC 20190912

Tillgänglig från: 2019-09-12 Skapad: 2019-09-12 Senast uppdaterad: 2019-09-12Bibliografiskt granskad
Kaldéus, T., Nordenström, M., Erlandsson, J., Wågberg, L. & Malmström, E. (2019). Redispersibility properties of dried cellulose nanofibrils - influence on structure and mechanical properties.
Öppna denna publikation i ny flik eller fönster >>Redispersibility properties of dried cellulose nanofibrils - influence on structure and mechanical properties
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2019 (Engelska)Ingår i: Artikel i tidskrift (Övrigt vetenskapligt) Epub ahead of print
Nationell ämneskategori
Polymerteknologi Pappers-, massa- och fiberteknik
Identifikatorer
urn:nbn:se:kth:diva-244055 (URN)
Anmärkning

QC 20190218

Tillgänglig från: 2019-02-15 Skapad: 2019-02-15 Senast uppdaterad: 2019-02-18Bibliografiskt granskad
Naderi, A., Koschella, A., Heinze, T., Shih, K. C., Nieh, M. P., Pfeifer, A., . . . Erlandsson, J. (2018). Corrigendum to “Sulfoethylated nanofibrillated cellulose: Production and properties” [Carbohydr. Polym. 169 (2017) 515–523] (S0144861717304101) (10.1016/j.carbpol.2017.04.026)). Carbohydrate Polymers, 179
Öppna denna publikation i ny flik eller fönster >>Corrigendum to “Sulfoethylated nanofibrillated cellulose: Production and properties” [Carbohydr. Polym. 169 (2017) 515–523] (S0144861717304101) (10.1016/j.carbpol.2017.04.026))
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2018 (Engelska)Ingår i: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 179Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The author Ali Naderi regrets the wrong information given with regard to his affiliation. The author would like to apologise for any inconvenience caused.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2018
Nationell ämneskategori
Kemi
Identifikatorer
urn:nbn:se:kth:diva-216809 (URN)10.1016/j.carbpol.2017.09.021 (DOI)000416367900001 ()2-s2.0-85029700169 (Scopus ID)
Anmärkning

Export Date: 24 October 2017; Erratum; CODEN: CAPOD; Correspondence Address: Naderi, A.; Innventia AB, Box 5604, Sweden; email: ali.naderi@innventia.com. QC 20171205

Tillgänglig från: 2017-12-05 Skapad: 2017-12-05 Senast uppdaterad: 2017-12-18Bibliografiskt granskad
Petrou, G., Jansson, R., Hogqvist, M., Erlandsson, J., Wågberg, L., Hedhammar, M. & Crouzier, T. (2018). Genetically Engineered Mucoadhesive Spider Silk. Biomacromolecules, 19(8), 3268-3279
Öppna denna publikation i ny flik eller fönster >>Genetically Engineered Mucoadhesive Spider Silk
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2018 (Engelska)Ingår i: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 19, nr 8, s. 3268-3279Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Mucoadhesion is defined as the adhesion of a material to the mucus gel covering the mucous membranes. The mechanisms controlling mucoadhesion include nonspecific electrostatic interactions and specific interactions between the materials and the mucins, the heavily glycosylated proteins that form the mucus gel. Mucoadhesive materials can be used to develop mucosal wound dressings and noninvasive transmucosal drug delivery systems. Spider silk, which is strong, biocompatible, biodegradable, nontoxic, and lightweight would serve as an excellent base for the development of such materials. Here, we investigated two variants of the partial spider silk protein 4RepCT genetically engineered in order to functionalize them with mucoadhesive properties. The pLys-4RepCT variant was functionalized with six cationically charged lysines, aiming to provide nonspecific adhesion from electrostatic interactions with the anionically charged mucins, while the hGal3-4RepCT variant was genetically fused with the Human Galectin-3 Carbohydrate Recognition Domain which specifically binds the mucin glycans Gal beta 1-3GlcNAc and Gal beta 1-4GlcNAc. First, we demonstrated that coatings, fibers, meshes, and foams can be readily made from both silk variants. Measured by the adsorption of both bovine submaxillary mucin and pig gastric mucin, the newly produced silk materials showed enhanced mucin binding properties compared with materials of wild-type (4RepCT) silk. Moreover, we showed that pLys-4RepCT silk coatings bind mucins through electrostatic interactions, while hGal3-4RepCT silk coatings bind mucins through specific glycan-protein interactions. We envision that the two new mucoadhesive silk variants pLys-4RepCT and hGal3-4RepCT, alone or combined with other biofunctional silk proteins, constitute useful new building blocks for a range of silk protein-based materials for mucosal treatments.

Ort, förlag, år, upplaga, sidor
AMER CHEMICAL SOC, 2018
Nationell ämneskategori
Medicinsk bioteknologi (med inriktning mot cellbiologi (inklusive stamcellsbiologi), molekylärbiologi, mikrobiologi, biokemi eller biofarmaci)
Identifikatorer
urn:nbn:se:kth:diva-234195 (URN)10.1021/acs.biomac.8b00578 (DOI)000441852400011 ()29932649 (PubMedID)2-s2.0-85049259614 (Scopus ID)
Anmärkning

QC 20180920

Tillgänglig från: 2018-09-20 Skapad: 2018-09-20 Senast uppdaterad: 2019-04-13Bibliografiskt granskad
López Durán, V., Erlandsson, J., Wågberg, L. & Larsson, P. A. (2018). Novel, Cellulose-Based, Lightweight, Wet-Resilient Materials with Tunable Porosity, Density, and Strength. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 6(8), 9951-9957
Öppna denna publikation i ny flik eller fönster >>Novel, Cellulose-Based, Lightweight, Wet-Resilient Materials with Tunable Porosity, Density, and Strength
2018 (Engelska)Ingår i: ACS SUSTAINABLE CHEMISTRY & ENGINEERING, ISSN 2168-0485, Vol. 6, nr 8, s. 9951-9957Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Highly porous materials with low density were developed from chemically modified cellulose fibers using solvent-exchange and air drying. Periodate oxidation was initially performed to introduce aldehydes into the cellulose chain, which were then further oxidized to carboxyl groups by chlorite oxidation. Low-density materials were finally achieved by a second periodate oxidation under which the fibers self-assembled into porous fibrous networks. Following a solvent exchange to acetone, these networks could be air-dried without shrinkage. The properties of the materials were tuned by mechanical mixing with a high intensity mixer for different times prior to the second periodate oxidation, which resulted in porosities between 94.4% and 96.3% (i.e., densities between 54 and 82 kg/m(3)). The compressive strength of the materials was between 400 and 1600 kPa in the dry state and between 20 and 50 kPa in the wet state. It was also observed that in the wet state the fiber networks could be compressed up to 80% while still being able to recover their shape. These networks are highly interesting for use in different types of absorption products, and since they also have a high wet integrity, they can be modified with physical methods for different high-value-added end-use applications.

Ort, förlag, år, upplaga, sidor
AMER CHEMICAL SOC, 2018
Nyckelord
Ambient drying, Cellulose, Chemical modification, Chlorite oxidation, Lightweight material, Periodate oxidation
Nationell ämneskategori
Polymerteknologi
Identifikatorer
urn:nbn:se:kth:diva-234192 (URN)10.1021/acssuschemeng.8b01165 (DOI)000441475500049 ()2-s2.0-85049192536 (Scopus ID)
Anmärkning

QC 20181001

Tillgänglig från: 2018-10-01 Skapad: 2018-10-01 Senast uppdaterad: 2019-09-13Bibliografiskt granskad
Erlandsson, J., Pettersson, T., Ingverud, T., Granberg, H., Larsson, P. A., Malkoch, M. & Wågberg, L. (2018). On the mechanism behind freezing-induced chemical crosslinking in ice-templated cellulose nanofibril aerogels. Journal of Materials Chemistry A, 6(40), 19371-19380
Öppna denna publikation i ny flik eller fönster >>On the mechanism behind freezing-induced chemical crosslinking in ice-templated cellulose nanofibril aerogels
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2018 (Engelska)Ingår i: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 6, nr 40, s. 19371-19380Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The underlying mechanism related to freezing-induced crosslinking of aldehyde-containing cellulose nanofibrils (CNFs) has been investigated, and the critical parameters behind this process have been identified. The aldehydes introduced by periodate oxidation allows for formation of hemiacetal bonds between the CNFs provided the fibrils are in sufficiently close contact before the water is removed. This is achieved during the freezing process where the cellulose components are initially separated, and the growth of ice crystals forces the CNFs to come into contact in the thin lamellae between the ice crystals. The crosslinked 3-D structure of the CNFs can subsequently be dried under ambient conditions after solvent exchange and still maintain a remarkably low density of 35 kg m-3, i.e. a porosity greater than 98%. A lower critical amount of aldehydes, 0.6 mmol g-1, was found necessary in order to generate a crosslinked 3-D CNF structure of sufficient strength not to collapse during the ambient drying. The chemical stability of the 3-D structure can be further enhanced by converting the hemiacetals to acetals by treatment with an alcohol under acidic conditions.

Ort, förlag, år, upplaga, sidor
Royal Society of Chemistry, 2018
Nyckelord
Aerogels, Aldehydes, Cellulose, Chemical stability, Crosslinking, Freezing, Nanofibers, Acidic conditions, Ambient conditions, Cellulose nanofibrils (CNFs), Chemical cross-linking, Freezing process, Lower critical, Periodate oxidation, Solvent exchanges, Ice
Nationell ämneskategori
Polymerteknologi
Identifikatorer
urn:nbn:se:kth:diva-247488 (URN)10.1039/c8ta06319b (DOI)000448413100008 ()2-s2.0-85055128762 (Scopus ID)
Anmärkning

QC 20190405

Tillgänglig från: 2019-04-05 Skapad: 2019-04-05 Senast uppdaterad: 2019-09-13Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0003-1874-2187

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