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Olsson, Richard
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Publications (10 of 19) Show all publications
Das, O., Hedenqvist, M. S., Johansson, E., Olsson, R., Loho, T. A., Capezza, A. J., . . . Holder, S. (2019). An all-gluten biocomposite: Comparisons with carbon black and pine char composites. Composites. Part A, Applied science and manufacturing, 120, 42-48
Open this publication in new window or tab >>An all-gluten biocomposite: Comparisons with carbon black and pine char composites
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2019 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 120, p. 42-48Article in journal (Refereed) Published
Abstract [en]

Three different charcoals (gluten char, pine bark char and carbon black) were used to rectify certain property disadvantages of wheat gluten plastic. Pyrolysis process of gluten was investigated by analysing the compounds released at different stages. Nanoindentation tests revealed that the gluten char had the highest hardness (ca. 0.5 GPa) and modulus (7.8 GPa) followed by pine bark char and carbon black. The addition of chars to gluten enhanced the indenter-modulus significantly. Among all the charcoals, gluten char was found to impart the best mechanical and water resistant properties. The addition of only 6 wt% gluten char to the protein caused a substantial reduction in water uptake (by 38%) and increase of indenter-modulus (by 1525%). It was shown that it is possible to obtain protein biocomposites where both the filler and the matrix are naturally sourced from the same material, in this case, yielding an all-gluten derived biocomposite.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
(Nominated) Biochar, A. Biocomposite, A. Polymer-matrix composites (PMCs), B. Hardness
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-246431 (URN)10.1016/j.compositesa.2019.02.015 (DOI)000463304100006 ()2-s2.0-85062035485 (Scopus ID)
Note

QC 20190402

Available from: 2019-04-02 Created: 2019-04-02 Last updated: 2019-04-29Bibliographically approved
Antonio, C., Andersson, R. ., Ström, V., Wu, Q., Sacchi, B., Farris, S., . . . Olsson, R. T. (2019). Preparation and Comparison of Reduced Graphene Oxide and Carbon Nanotubes as Fillers in Conductive Natural Rubber for Flexible Electronics. Omega, 4(2)
Open this publication in new window or tab >>Preparation and Comparison of Reduced Graphene Oxide and Carbon Nanotubes as Fillers in Conductive Natural Rubber for Flexible Electronics
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2019 (English)In: Omega, ISSN 0030-2228, E-ISSN 1541-3764, Vol. 4, no 2Article in journal (Refereed) Published
Abstract [en]

Conductive natural rubber (NR) nanocomposites were prepared by solvent-casting suspensions of reduced graphene oxide(rGO) or carbon nanotubes (CNTs), followed by vulcanization of the rubber composites. Both rGO and CNT were compatible as fillers in the NR as well as having sufficient intrinsic electrical conductivity for functional applications. Physical (thermal) and chemical reduction of GO were investigated, and the results of the reductions were monitored by X-ray photoelectron spectroscopy for establishing a reduction protocol that was useful for the rGO nanocomposite preparation. Field-emission scanning electron microscopy showed that both nanofillers were adequately dispersed in the main NR phase. The CNT composite displays a marked mechanical hysteresis and higher elongation at break, in comparison to the rGO composites for an equal fraction of the carbon phase. Moreover, the composite conductivity was always ca. 3-4 orders of magnitude higher for the CNT composite than for the rGO composites, the former reaching a maximum conductivity of ca. 10.5 S/m, which was explained by the more favorable geometry of the CNT versus the rGO sheets. For low current density applications though, both composites achieved the necessary percolation and showed the electrical conductivity needed for being applied as flexible conductors for a light-emitting diode. 

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019
National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-246150 (URN)10.1021/acsomega.8b03630 (DOI)000460237300107 ()2-s2.0-85061903645 (Scopus ID)
Note

QC 20190318

Available from: 2019-03-14 Created: 2019-03-14 Last updated: 2019-05-22Bibliographically approved
Ye, X., Lendel, C., Langton, M., Olsson, R. & Hedenqvist, M. S. (2019). Protein nanofibrils: Preparation, properties, and possible applications in industrial nanomaterials. In: Industrial Applications of Nanomaterials: (pp. 29-63). Elsevier
Open this publication in new window or tab >>Protein nanofibrils: Preparation, properties, and possible applications in industrial nanomaterials
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2019 (English)In: Industrial Applications of Nanomaterials, Elsevier, 2019, p. 29-63Chapter in book (Other academic)
Abstract [en]

This chapter deals with protein nanofibrils (PNFs), also referred to as amyloid fibrils. This is an emerging field in nanoscience and engineering. Sources for PNFs, ways of making these, including the mechanisms of the fibrillation process, and factors affecting the production process are presented here. Properties of the PNFs themselves as well as properties and preparation of PNF materials in the form of hydrogels, films, and fibers are also described. In this chapter, PNF-based nanocomposites and templates are also considered. Possible applications of PNFs are discussed and put in the perspective of future uses as, or in, industrial nanomaterials.

Place, publisher, year, edition, pages
Elsevier, 2019
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-258235 (URN)10.1016/B978-0-12-815749-7.00002-5 (DOI)978-0-12-815749-7 (ISBN)
Note

QC 20191015

Available from: 2019-09-10 Created: 2019-09-10 Last updated: 2019-10-15Bibliographically approved
Alander, B., Capezza, A., Wu, Q., Johansson, E., Olsson, R. T. & Hedenqvist, M. (2018). A facile way of making inexpensive rigid and soft protein biofoams with rapid liquid absorption. Industrial crops and products (Print), 119, 41-48
Open this publication in new window or tab >>A facile way of making inexpensive rigid and soft protein biofoams with rapid liquid absorption
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2018 (English)In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, Vol. 119, p. 41-48Article in journal (Refereed) Published
Abstract [en]

A novel and facile method to produce inexpensive protein biofoams suitable for sponge applications is presented. The protein used in the study was wheat gluten (WG), readily available as a by/co-product, but the method is expected to work for other cross-linkable proteins. The foams were obtained by high-speed stirring of pristine WG powder in water at room temperature followed by drying. Glutaraldehyde was used to crosslink the foam material in order to stabilize the dispersion, reduce its tackiness and improve the strength of the final foam. The foams were of medium to high density and absorbed readily both hydrophobic and hydrophilic liquids. The foam structure, consisting primarily of an open pore/channel system, led to a remarkably fast capillary-driven (pore-filling only) uptake of a hydrophobic liquid (limonene). Essentially all uptake occurred within the first second (to ca. 90% of the dry weight). In a polar liquid (water), the rapid pore-filling occurred in parallel with a more time-dependent swelling of the foam matrix material. Further improvement in the foam strength was achieved by making a denser foam or adding TEMPO-oxidized cellulose nanofibres. Soft foams were obtained by adding glycerol.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Wheat gluten; Foam; TEMPO cellulose nanofibres; Plasticised; Absorption; Mechanics
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-226143 (URN)10.1016/j.indcrop.2018.03.069 (DOI)000432763800005 ()2-s2.0-85044920664 (Scopus ID)
Funder
Swedish Research Council Formas, 243-2011-1436
Note

QC 20180418

Available from: 2018-04-13 Created: 2018-04-13 Last updated: 2018-06-13Bibliographically approved
Ghaani, M., Rovera, C., Pucillo, F., Ghaani, M. R., Olsson, R. T., Scampicchio, M. & Farris, S. (2018). Determination of 2,4-diaminotoluene by a bionanocomposite modified glassy carbon electrode. Sensors and actuators. B, Chemical, 277, 477-483
Open this publication in new window or tab >>Determination of 2,4-diaminotoluene by a bionanocomposite modified glassy carbon electrode
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2018 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 277, p. 477-483Article in journal (Refereed) Published
Abstract [en]

This work describes the development of a modified glassy carbon electrode (GCE) for the selective determination of 2,4-diaminotoluene (TDA), a primary aromatic amines (PAAs) that can be formed in food packaging materials including aromatic polyurethane (PU) adhesives. The electrode's surface was modified with multi-walled carbon nanotubes (MWCNTs), MWCNTs in chitosan (CS), and gold nanoparticles (AuNPs). The highest current response was achieved with AuNPs/MWCNTs-CS/GC electrodes, which exhibited an oxidation peak of 9.87 μA by cyclic voltammetry (CV), compared with 1.39 μA of the bare GCE. A detection limit of 35 nM was estimated by amperometry experiments. The oxidation of TDA was strongly dependent on the pH of the medium, having maximum sensitivity at pH ∼ 7. From a mechanistic point of view, the diffusion coefficient of TDA (D = 6.47 × 10−4 cm2 s−1) and the number of electrons (n ≈ 2) involved in the catalytic oxidation of TDA at the surface of the AuNPs/MWCNTs-CS/GCE were determined. The practical utility of this nanocomposite modified electrode was demonstrated by migration studies from conventional food packaging materials. 

Place, publisher, year, edition, pages
Elsevier B.V., 2018
Keywords
2, 4-Diaminotoluene (TDA), Chitosan, Electrochemical nanosensor electrode, Gold nanoparticle, Multi-walled carbon nanotube, Primary aromatic amine, Adhesives, Amines, Aromatic compounds, Aromatization, Catalytic oxidation, Cyclic voltammetry, Glass, Gold nanoparticles, Metal nanoparticles, Multiwalled carbon nanotubes (MWCN), Oxidation, Packaging machines, Packaging materials, Yarn, Food-packaging materials, Maximum sensitivity, Modified electrodes, Modified glassy carbon electrode, Number of electrons, Primary aromatic amines, Selective determination, Glass membrane electrodes
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-236544 (URN)10.1016/j.snb.2018.09.053 (DOI)000453066700061 ()2-s2.0-85053474908 (Scopus ID)
Note

QC 20181127

Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-05-20Bibliographically approved
Rovera, C., Ghaani, M., Santo, N., Trabattoni, S., Olsson, R., Romano, D. & Farris, S. (2018). Enzymatic Hydrolysis in the Green Production of Bacterial Cellulose Nanocrystals. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 6(6), 7725-7734
Open this publication in new window or tab >>Enzymatic Hydrolysis in the Green Production of Bacterial Cellulose Nanocrystals
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2018 (English)In: ACS SUSTAINABLE CHEMISTRY & ENGINEERING, ISSN 2168-0485, Vol. 6, no 6, p. 7725-7734Article in journal (Refereed) Published
Abstract [en]

In this study, we extensively describe experimental models, with correlating experimental conditions, which were used to investigate the enzymatic hydrolysis of bacterial cellulose (BC) to obtain nanocrystals. Cellulase from Trichoderma reesei was used in five enzyme/BC ratios over a period of 74 h. The turbidity data was modeled using both logistic regression and empirical regression to determine the fractal kinetics, resulting in unique kinetic patterns for the mixtures that were richest in BC and in enzymes. The evolution of the yield was inversely related to the turbidity, as confirmed through a semiempirical approach that was adopted to model the experimental data. The yield values after 74 h of hydrolysis were higher for the substrate-rich mixtures (similar to 20%) than for the enzyme rich mixtures (similar to 5%), as corroborated by cellobiose and glucose quantification. Transmission electron microscopy and atomic force microscopy analyses revealed a shift from a fibril network to a needle-like morphology (i.e., aggregated nanocrystals or individual nanocrystals similar to 6 nm width and 200-800 nm in length) as the enzyme/BC ratios went from lower to higher. These results were explained in terms of the heterogeneous substrate model and the erosion model. This work initiated a promising, environmentally friendly method that could serve as an alternative to the commonly used chemical hydrolysis routes.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2018
Keywords
atomic force microscopy, modeling, morphology, kinetic, transmission electron microscopy, turbidity, yield
National Category
Other Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-231195 (URN)10.1021/acssuschemeng.8b00600 (DOI)000434491600059 ()2-s2.0-85046765425 (Scopus ID)
Note

QC 20180720

Available from: 2018-07-20 Created: 2018-07-20 Last updated: 2018-07-20Bibliographically approved
Lo Re, G., Engström, J., Wu, Q., Malmström, E., Gedde, U. W., Olsson, R. & Berglund, L. (2018). Improved Cellulose Nanofibril Dispersion in Melt-Processed Polycaprolactone Nanocomposites by a Latex-Mediated Interphase and Wet Feeding as LDPE Alternative. ACS Applied Nano Materials, 1(6), 2669-2677
Open this publication in new window or tab >>Improved Cellulose Nanofibril Dispersion in Melt-Processed Polycaprolactone Nanocomposites by a Latex-Mediated Interphase and Wet Feeding as LDPE Alternative
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2018 (English)In: ACS Applied Nano Materials, ISSN 2574-0970, Vol. 1, no 6, p. 2669-2677Article in journal (Refereed) Published
Abstract [en]

This work reports the development of a sustainable and green one-step wet-feeding method to prepare tougher and stronger nanocomposites from biodegradable cellulose nanofibrils (CNF)/polycaprolactone (PCL) constituents, compatibilized with reversible addition fragmentation chain transfer-mediated surfactant-free poly(methyl methacrylate) (PMMA) latex nanoparticles. When a PMMA latex is used, a favorable electrostatic interaction between CNF and the latex is obtained, which facilitates mixing of the constituents and hinders CNF agglomeration. The improved dispersion is manifested in significant improvement of mechanical properties compared with the reference material. The tensile tests show much higher modulus (620 MPa) and strength (23 MPa) at 10 wt % CNF content (compared to the neat PCL reference modulus of 240 and 16 MPa strength), while maintaining high level of work to fracture the matrix (7 times higher than the reference nanocomposite without the latex compatibilizer). Rheological analysis showed a strongly increased viscosity as the PMMA latex was added, that is, from a well-dispersed and strongly interacting CNF network in the PCL.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-241449 (URN)10.1021/acsanm.8b00376 (DOI)000461400700029 ()
Note

QC 20190123

Available from: 2019-01-22 Created: 2019-01-22 Last updated: 2019-04-23Bibliographically approved
Ozeren, H. D., Nilsson, F., Olsson, R. & Hedenqvist, M. S. (2018). Prediction of plasticization mechanisms for biobased plastics through a combined experimental and molecular dynamics simulations approach. Paper presented at 256th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nanoscience, Nanotechnology and Beyond, AUG 19-23, 2018, Boston, MA. Abstract of Papers of the American Chemical Society, 256
Open this publication in new window or tab >>Prediction of plasticization mechanisms for biobased plastics through a combined experimental and molecular dynamics simulations approach
2018 (English)In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 256Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-238553 (URN)000447609105036 ()
Conference
256th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nanoscience, Nanotechnology and Beyond, AUG 19-23, 2018, Boston, MA
Note

QC 20181105

Available from: 2018-11-05 Created: 2018-11-05 Last updated: 2018-11-05Bibliographically approved
Nordenström, M., Riazanova, A., Järn, M., Paulraj, T., Turner, C., Ström, V., . . . Svagan, A. (2018). Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality. Scientific Reports, 8, Article ID 3647.
Open this publication in new window or tab >>Superamphiphobic coatings based on liquid-core microcapsules with engineered capsule walls and functionality
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2018 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, article id 3647Article in journal (Refereed) Published
Abstract [en]

Microcapsules with specific functional properties, related to the capsule wall and core, are highly desired in a number of applications. In this study, hybrid cellulose microcapsules (1.2 +/- 0.4 mu m in diameter) were prepared by nanoengineering the outer walls of precursor capsules. Depending on the preparation route, capsules with different surface roughness (raspberry or broccoli-like), and thereby different wetting properties, could be obtained. The tunable surface roughness was achieved as a result of the chemical and structural properties of the outer wall of a precursor capsule, which combined with a new processing route allowed in-situ formation of silica nanoparticles (30-40 nm or 70 nm in diameter). By coating glass slides with "broccoli-like" microcapsules (30-40 nm silica nanoparticles), static contact angles above 150 degrees and roll-off angles below 6 degrees were obtained for both water and low surface-tension oil (hexadecane), rendering the substrate superamphiphobic. As a comparison, coatings from raspberry-like capsules were only strongly oleophobic and hydrophobic. The liquid-core of the capsules opens great opportunities to incorporate different functionalities and here hydrophobic superparamagnetic nanoparticles (SPIONs) were encapsulated. As a result, magnetic broccoli-like microcapsules formed an excellent superamphiphobic coating-layer on a curved geometry by simply applying an external magnetic field.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP, 2018
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-225297 (URN)10.1038/s41598-018-21957-y (DOI)000426045700068 ()29483613 (PubMedID)2-s2.0-85042684065 (Scopus ID)
Note

QC 20180405

Available from: 2018-04-05 Created: 2018-04-05 Last updated: 2018-04-05Bibliographically approved
Karlsson, M. E., Mamie, Y. C., Calamida, A., Gardner, J. M., Ström, V., Pourrahimi, A. M. & Olsson, R. (2018). Synthesis of Zinc Oxide Nanorods via the Formation of Sea Urchin Structures and Their Photoluminescence after Heat Treatment. Langmuir, 34(17), 5079-5087
Open this publication in new window or tab >>Synthesis of Zinc Oxide Nanorods via the Formation of Sea Urchin Structures and Their Photoluminescence after Heat Treatment
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2018 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 34, no 17, p. 5079-5087Article in journal (Refereed) Published
Abstract [en]

A protocol for the aqueous synthesis of ca. 1-mu m-long zinc oxide (ZnO) nanorods and their growth at intermediate reaction progression is presented, together with photoluminescence (PL) characteristics after heat treatment at temperatures of up to 1000 degrees C. The existence of solitary rods after the complete reaction (60 min) was traced back to the development of sea urchin structures during the first 5 s of the precipitation. The rods primarily formed in later stages during the reaction due to fracture, which was supported by the frequently observed broken rod ends with sharp edges in the final material, in addition to tapered uniform rod ends consistent with their natural growth direction. The more dominant rod growth in the c direction (extending the length of the rods), together with the appearance of faceted surfaces on the sides of the rods, occurred at longer reaction times (>5 min) and generated zinc-terminated particles that were more resistant to alkaline dissolution. A heat treatment for 1 h at 600 or 800 degrees C resulted in a smoothing of the rod surfaces, and PL measurements displayed a decreased defect emission at ca. 600 nm, which was related to the disappearance of lattice imperfections formed during the synthesis. A heat treatment at 1000 degrees C resulted in significant crystal growth reflected as an increase in luminescence at shorter wavelengths (ca. 510 nm). Electron microscopy revealed that the faceted rod structure was lost for ZnO rods exposed to temperatures above 600 degrees C, whereas even higher temperatures resulted in particle sintering and/or mass redistribution along the initially long and slender ZnO rods. The synthesized ZnO rods were a more stable Wurtzite crystal structure than previously reported ball-shaped ZnO consisting of merging sheets, which was supported by the shifts in PL spectra occurring at ca. 200 degrees C higher annealing temperature, in combination with a smaller thermogravimetric mass loss occurring upon heating the rods to 800 degrees C.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2018
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-228274 (URN)10.1021/acs.langmuir.8b01101 (DOI)000431463500016 ()29630844 (PubMedID)2-s2.0-85046301419 (Scopus ID)
Note

QC 20180521

Available from: 2018-05-21 Created: 2018-05-21 Last updated: 2018-05-21Bibliographically approved
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