Change search
Link to record
Permanent link

Direct link
BETA
Alternative names
Publications (10 of 155) Show all publications
de Carvalho, D. M., Moser, C., Lindström, M. & Sevastyanova, O. (2019). Impact of the chemical composition of cellulosic materials on the nanofibrillation process and nanopaper properties. Industrial crops and products (Print), 127, 203-211
Open this publication in new window or tab >>Impact of the chemical composition of cellulosic materials on the nanofibrillation process and nanopaper properties
2019 (English)In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, Vol. 127, p. 203-211Article in journal (Refereed) Published
Abstract [en]

This paper investigated the impact of the amounts of lignin and hemicelluloses on cellulose nanofibers (CNFs). Birch and spruce wood were used to prepare holocellulose and cellulose samples by classical methods. To better assess the effect of the chemical composition on the CNF performance and simplify the process for CNF preparation, no surface derivatization method was applied for CNF preparation. Increased amounts of hemicelluloses, especially mannans, improved the defibration process, the stability of the CNFs and the mechanical properties, whereas the residual lignin content had no significant effect on these factors. On the other hand, high lignin content turned spruce nanopapers yellowish and, together with hemicelluloses, reduced the strain-at-break values. Finally, when no surface derivatization was applied to holocellulose and cellulose samples before defibration, the controlled preservation of residual lignin and hemicelluloses on the CNFs indicate to be crucial for the process. This simplified method of CNF preparation presents great potential for forest-based industries as a way to use forestry waste (e.g., branches, stumps, and sawdust) to produce CNFs and, consequently, diversify the product range and reach new markets.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Birch wood, Spruce wood, Cellulose nanofiber (CNF), Holocellulose CNF, Nanopaper, Residual cell wall components
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-238861 (URN)10.1016/j.indcrop.2018.10.052 (DOI)000452565200025 ()2-s2.0-85055735243 (Scopus ID)
Note

QC 20181120

Available from: 2018-11-13 Created: 2018-11-13 Last updated: 2019-01-04Bibliographically approved
Tagami, A., Gioia, C., Lauberts, M., Budnyak, T., Moriana, R., Lindström, M. & Sevastyanova, O. (2019). Solvent fractionation of softwood and hardwood kraft lignins for more efficient uses: Compositional, structural, thermal, antioxidant and adsorption properties. Industrial crops and products (Print), 129, 123-134
Open this publication in new window or tab >>Solvent fractionation of softwood and hardwood kraft lignins for more efficient uses: Compositional, structural, thermal, antioxidant and adsorption properties
Show others...
2019 (English)In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, Vol. 129, p. 123-134Article in journal (Refereed) Published
Abstract [en]

This work summarizes the impact of solvent fractionation on the chemical structure, antioxidant activity, heating values, and thermal and adsorption properties of industrial hardwood and softwood kraft lignins. The aim of the research was to develop a simple approach for obtaining lignin fractions with tailored properties for applications in certain materials. Four common industrial solvents, namely, ethyl acetate, ethanol, methanol and acetone, in various combinations, were found to be efficient for separating spruce and eucalyptus kraft lignins into fractions with low polydispersities. The ethanol fraction of spruce and the ethyl acetate fraction of eucalyptus afforded the highest yields. Gel-permeation chromatography analysis was used to evaluate the efficiency of the chosen solvent combination for lignin fractionation. The composition and structure of the lignin material was characterized by elemental analysis, analytical pyrolysis (Py-GC/MS/FID) and P-31 NMR spectro-scopy. The thermal properties of the lignin samples were studied using thermogravimetric analysis. Proximate analysis data (ash, volatile components, organic matter and fixed carbon) was obtained through the direct measurement of weight changes in each experimental curve, and the high heating values (in MJ/kg) were calculated according to equations suggested in the literature. The adsorption properties of fractionated kraft lignins were studied using methylene blue dye. The correlations observed between molecular weight, composition and functionality and the thermal, radical scavenging and adsorption properties of the lignin fractions provides useful information for selecting the appropriate solvent combinations for specific applications of lignin raw materials (including their use as antioxidants, biofuels or sorbents in water treatment processes).

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
Keywords
Kraft lignin, Solvent fractionation, Structural analysis, Antioxidant activity, Thermal stability, Adsorption
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-244491 (URN)10.1016/j.indcrop.2018.11.067 (DOI)000457504200015 ()2-s2.0-85057882324 (Scopus ID)
Note

QC 20190327

Available from: 2019-03-27 Created: 2019-03-27 Last updated: 2019-05-14Bibliographically approved
Moser, C., Henriksson, G. & Lindström, M. (2019). Structural aspects on the manufacturing of cellulose nanofibers from wood pulp fibers. BioResources, 14(1), 2269-2276
Open this publication in new window or tab >>Structural aspects on the manufacturing of cellulose nanofibers from wood pulp fibers
2019 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 14, no 1, p. 2269-2276Article in journal (Refereed) Published
Abstract [en]

The exact mechanism behind the disintegration of chemical pulp fiber into cellulose nanofibers is poorly understood. In this study, samples were subjected to various homogenization cycles, indicating that the mechanism is a stepwise process. In the earlier stages of the mechanical process, a large amount of macrofibrils were created as the larger structures disappeared. Upon mechanical treatment these macrofibrils disappeared despite the increasing yield of cellulose nanofibers. The proposed model expands the understanding of the disintegration pathway and may provide additional insight as to how wood cells are converted into microfibrils.

Place, publisher, year, edition, pages
North Carolina State University, 2019
Keywords
Cellulose, Hierarchy, Macrofibrils, Nanofibers
National Category
Composite Science and Engineering
Identifiers
urn:nbn:se:kth:diva-244204 (URN)10.15376/biores.14.1.2269-2276 (DOI)000459494400155 ()2-s2.0-85061333292 (Scopus ID)
Note

QC 20190218

Available from: 2019-02-18 Created: 2019-02-18 Last updated: 2019-03-15Bibliographically approved
Zhao, Y., Tagami, A., Dobele, G., Lindström, M. E. & Sevastyanova, O. (2019). The Impact of Lignin Structural Diversity on Performance of Cellulose Nanofiber (CNF)-Starch Composite Films. Polymers, 11(3), Article ID 538.
Open this publication in new window or tab >>The Impact of Lignin Structural Diversity on Performance of Cellulose Nanofiber (CNF)-Starch Composite Films
Show others...
2019 (English)In: Polymers, ISSN 2073-4360, E-ISSN 2073-4360, Vol. 11, no 3, article id 538Article in journal (Refereed) Published
Abstract [en]

Lignin fractions having different molecular weights and varied chemical structures isolated from kraft lignins of both softwood and hardwood via a sequential solvent fractionation technique were incorporated into a tunicate cellulose nanofibers (CNF)-starch mixture to prepare 100% bio-based composite films. The aim was to investigate the impact of lignin structural diversity on film performance. It was confirmed that lignin's distribution in the films was dependent on the polarity of solvents used for fractionation (acetone > methanol > ethanol > ethyl acetate) and influenced the optical properties of the films. The -OH group content and molecular weight of lignin were positively related to film density. In general, the addition of lignin fractions led to decrease in thermal stability and increase in Young's modulus of the composite films. The modulus of the films was found to decrease as the molecular weight of lignin increased, and a higher amount of carboxyl and phenolic -OH groups in the lignin fraction resulted in films with higher stiffness. The thermal analysis showed higher char content formation for lignin-containing films in a nitrogen atmosphere with increased molecular weight. In an oxygen atmosphere, the phenol content, saturated side chains and short chain structures of lignin had impacts on the maximum decomposition temperature of the films, confirming the relationship between the chemical structure of lignin and thermo-oxidative stability of the corresponding film. This study addresses the importance of lignin diversities on composite film performance, which could be helpful for tailoring lignin's applications in bio-based materials based on their specific characteristics.

Place, publisher, year, edition, pages
MDPI, 2019
Keywords
lignin, successive solvent fractionation, tunicate cellulose nanofibers-starch-lignin composites, film properties, interrelation
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-251350 (URN)10.3390/polym11030538 (DOI)000464510400005 ()30960522 (PubMedID)2-s2.0-85063399636 (Scopus ID)
Note

QC 20190521

Available from: 2019-05-21 Created: 2019-05-21 Last updated: 2019-05-23Bibliographically approved
Moser, C., Henriksson, G. & Lindström, M. (2018). Improved dispersibility of once-dried cellulose nanofibers in the presence of glycerol. Nordic Pulp & Paper Research Journal
Open this publication in new window or tab >>Improved dispersibility of once-dried cellulose nanofibers in the presence of glycerol
2018 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669Article in journal (Refereed) Epub ahead of print
Abstract [en]

To investigate the dispersibility of dried cellulose nanofibers (CNFs), various additions (glycerol, octanol, glycol, and sodium perchlorate) were added to CNFs prior to drying. Glycerol was the only species to show any significant effect on re-dispersibility. The sedimentation was slower, and the transmittance of the solution was comparable to that of its undried counterpart. Increasing the amount of glycerol showed a clear trend with regard to dispersibility. The mechanical properties of films were maintained for samples that were dried and redispersed in the presence of glycerol.

Place, publisher, year, edition, pages
Berlin: De Gruyter Open, 2018
Keywords
cellulose nanofibers, CNF, drying, glycerol, hornification, MFC, redispersion
National Category
Paper, Pulp and Fiber Technology
Research subject
Fibre and Polymer Science
Identifiers
urn:nbn:se:kth:diva-238860 (URN)10.1515/npprj-2018-0054 (DOI)000451437900008 ()2-s2.0-85056550081 (Scopus ID)
Note

QC 20181120

Available from: 2018-11-13 Created: 2018-11-13 Last updated: 2018-12-21Bibliographically approved
Martinez-Abad, A., Quero, A. J., Berglund, J., Giummarella, N., Henriksson, G., Lindström, M., . . . Vilaplana, F. (2018). Influence of the molecular structure of wood hemicelluloses on the recalcitrance of lignocellulosic biomass. Paper presented at 255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA. Abstract of Papers of the American Chemical Society, 255
Open this publication in new window or tab >>Influence of the molecular structure of wood hemicelluloses on the recalcitrance of lignocellulosic biomass
Show others...
2018 (English)In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-240163 (URN)000435537702769 ()
Conference
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Note

QC 20190111

Available from: 2019-01-11 Created: 2019-01-11 Last updated: 2019-01-11Bibliographically approved
Henriksson, G., Berglund, J., Wohlert, J., Lawoko, M., Aminzadeh, S., Lindström, M. & Vilaplana, F. (2018). Non-cellulose wood polysaccharides - a need for a stricter structural and functional classification?. Paper presented at 255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA. Abstract of Papers of the American Chemical Society, 255
Open this publication in new window or tab >>Non-cellulose wood polysaccharides - a need for a stricter structural and functional classification?
Show others...
2018 (English)In: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-240158 (URN)000435537702766 ()
Conference
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Note

QC 20190108

Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-08Bibliographically approved
Budnyak, T., Aminzadeh, S., Pylypchuk, I., Riazanova, A., Tertykh, V., Lindström, M. & Sevastyanova, O. (2018). Peculiarities of synthesis and properties of lignin-silica nanocomposites prepared by sol-gel method. Nanomaterials, 8(11), 1-18
Open this publication in new window or tab >>Peculiarities of synthesis and properties of lignin-silica nanocomposites prepared by sol-gel method
Show others...
2018 (English)In: Nanomaterials, Vol. 8, no 11, p. 1-18Article in journal (Refereed) Published
Abstract [en]

The development of advanced hybrid materials based on polymers from biorenewable sources and mineral nanoparticles is currently of high importance. In this paper, we applied softwood kraft lignins for the synthesis of lignin/SiO2 nanostructured composites. We described the peculiarities of composites formation in the sol-gel process through the incorporation of the lignin into a silica network during the hydrolysis of tetraethoxysilane (TEOS). The initial activation of lignins was achieved by means of a Mannich reaction with 3-aminopropyltriethoxysilane (APTES). In the study, we present a detailed investigation of the physicochemical characteristics of initial kraft lignins and modified lignins on each step of the synthesis. Thus, 2D-NMR, 31P-NMR, size-exclusion chromatography (SEC) and dynamic light scattering (DLS) were applied to analyze the characteristics of pristine lignins and lignins in dioxan:water solutions. X-Ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) were used to confirm the formation of the lignin–silica network and characterize the surface and bulk structures of the obtained hybrids. Termogravimetric analysis (TGA) in nitrogen and air atmosphere were applied to a detailed investigation of the thermal properties of pristine lignins and lignins on each step of modification. SEM confirmed the nanostructure of the obtained composites. As was demonstrated, the activation of lignin is crucial for the sol-gel formation of a silica network in order to create novel hybrid materials from lignins and alkoxysilanes (e.g., TEOS). It was concluded that the structure of the lignin had an impact on its reactivity during the activation reaction, and consequently affected the properties of the final hybrid materials.

Place, publisher, year, edition, pages
MDPI, 2018
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-239348 (URN)10.3390/nano8110950 (DOI)
Note

QC 20181122

Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2018-11-22Bibliographically approved
Halysh, V., Sevastyanova, O., Riazanova, A. V., Pasalskiy, B., Budnyak, T., Lindström, M. & Kartel, M. (2018). Walnut shells as a potential low-cost lignocellulosic sorbent for dyes and metal ions. Cellulose (London), 25(8), 4729-4742
Open this publication in new window or tab >>Walnut shells as a potential low-cost lignocellulosic sorbent for dyes and metal ions
Show others...
2018 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 25, no 8, p. 4729-4742Article in journal (Refereed) Published
Abstract [en]

Currently, it is necessary to develop new methods and materials for solving the problem of environmental pollution by various toxicants. For these purposes, vegetal materials can be used. In this study, efficient low-cost sorbents based on walnut shells, an agro-industrial by-product, were prepared by treatment with acetic acid or a mixture of acetic acid and hydrogen peroxide. It was shown that the treatments significantly affected the composition and structure of walnut shells and their sorption properties with respect to organic dyes (methylene blue, methyl violet, and murexide) and heavy metal ions. Methylene blue dye was used for additional studies on the effect of pH, contact time and kinetics of sorption. The maximum adsorption rate of the dye occurred within the first 30 min of contact, during which the concentration of methylene blue in the solution was reduced by more than half. Full sorption equilibrium was reached within 180-230 min for studied samples. The adsorption kinetics of methylene blue was found to best be described by pseudo-second-order kinetic model. It was shown that dyes adsorption processes were well described by Freundlich model, which takes into consideration the heterogeneity of the surface of the adsorbent. The obtained plant sorbents are characterized by a high sorption capacity for heavy metal ions (18-29 mg/g for Fe3+ and 33-44 mg/g for Cu-2). Due to their numerous advantages, such as the high sorption capacity, high availability and low cost of raw materials, simplicity of disposal and nontoxicity, the obtained natural sorbents may have a wide practical use in industrial wastewater treatment. [GRAPHICS] .

Place, publisher, year, edition, pages
Springer, 2018
Keywords
Walnut shells, Cellulose, Lignin, Dye, Metals, Sorption
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-232598 (URN)10.1007/s10570-018-1896-y (DOI)000438276000032 ()2-s2.0-85048377766 (Scopus ID)
Note

QC 20180731

Available from: 2018-07-31 Created: 2018-07-31 Last updated: 2019-05-02Bibliographically approved
Moser, C., Backlund, H., Lindström, M. & Henriksson, G. (2018). Xyloglucan for estimating the surface area of cellulose fibers. Nordic Pulp & Paper Research Journal, 33(2), 194-199
Open this publication in new window or tab >>Xyloglucan for estimating the surface area of cellulose fibers
2018 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 33, no 2, p. 194-199Article in journal (Refereed) Published
Abstract [en]

The hemicellulose xyloglucan can be utilized to measure exposed cellulose surfaces for pulp fibers. This was shown by correlating a refining series with the adsorbed amount of xyloglucan, and by swelling cellulose fibers to various degrees by increasing the charge density. The method is specific to cellulose and could be used to quantify refining or to determine hornification.

Place, publisher, year, edition, pages
Berlin: De Gruyter Open, 2018
Keywords
cellulose, fibers, specific surface area, softwood, TEMPO, xyloglucan
National Category
Paper, Pulp and Fiber Technology
Research subject
Fibre and Polymer Science
Identifiers
urn:nbn:se:kth:diva-238858 (URN)10.1515/npprj-2018-3035 (DOI)2-s2.0-85049131618 (Scopus ID)
Note

QC 20181120

Available from: 2018-11-13 Created: 2018-11-13 Last updated: 2019-05-02Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2900-4713

Search in DiVA

Show all publications