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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
Abbadessa, A., Oinonen, P. & Henriksson, G. (2018). Characterization of Two Novel Bio-based Materials from Pulping Process Side Streams: Ecohelix and CleanFlow Black Lignin. BioResources, 13(4), 7606-7627
Open this publication in new window or tab >>Characterization of Two Novel Bio-based Materials from Pulping Process Side Streams: Ecohelix and CleanFlow Black Lignin
2018 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 13, no 4, p. 7606-7627Article in journal (Refereed) Published
Abstract [en]

The characteristics of two novel types of technical lignin, namely Ecohelix (EH) and CleanFlow black lignin (CFBL), isolated from two different pulping process side streams, were analyzed. EH and CFBL were analyzed in terms of general composition, chemical functionalities, molar mass distribution, and thermal stability. For comparison, two relevant types of commercially available lignosulfonate and kraft lignin were used. The results showed that EH contains a large amount of sulfonated lignin, together with carbohydrates and ash. As such, it can be considered a lignin-carbohydrate hybrid molecule. CFBL was found to contain 91.5% Klason lignin and the lowest amount of carbohydrates (0.3%). EH showed the highest content of aliphatic OH groups (5.44 mmol/g) and CFBL a high content of phenols (4.73 mmol/g). EH had a molecular weight of 31.4 kDa and a sufficient thermal stability. CFBL had the lowest molecular weight (M-w = 2.0 kDa) and thermal stability of all kraft lignins analyzed in this study. These properties highlighted that EH is a suitable building block for material development and that CFBL is a promising material for the production of biofuel and biochemicals.

Place, publisher, year, edition, pages
NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI, 2018
Keywords
Lignin characterization, Lignin-carbohydrate complexes, Laccase, Ultrafiltered lignin, Kraft lignin, Lignosulfonate, RUITER GA, 1992, ANALYTICAL BIOCHEMISTRY, V207, P176 Kendry P, 2002, BIORESOURCE TECHNOLOGY, V83, P55 woko M, 2005, BIOMACROMOLECULES, V6, P3467
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-241237 (URN)10.15376/biores.13.4.7606-7627 (DOI)000454215100033 ()
Note

QC 20190116

Available from: 2019-01-16 Created: 2019-01-16 Last updated: 2019-03-18Bibliographically 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
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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?
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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
Zhao, Y., Moser, C. & Henriksson, G. (2018). Transparent Composites Made from Tunicate Cellulose Membranes and Environmentally Friendly Polyester. ChemSusChem, 11(10), 1728-1735
Open this publication in new window or tab >>Transparent Composites Made from Tunicate Cellulose Membranes and Environmentally Friendly Polyester
2018 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 11, no 10, p. 1728-1735Article in journal (Refereed) Published
Abstract [en]

A series of optically transparent composites were made by using tunicate cellulose membranes, in which the naturally organized cellulose microfibrillar network structure of tunicate tunics was preserved and used as the template and a solution of glycerol and citric acid at different molar ratios was used as the matrix. Polymerization through ester bond formation occurred at elevated temperatures without any catalyst, and water was released as the only byproduct. The obtained composites had a uniform and dense structure. Thus, the produced glycerol citrate polyester improved the transparency of the tunicate cellulose membrane while the cellulose membrane provided rigidity and strength to the prepared composite. The interaction between cellulose and polyester afforded the composites high thermal stability. Additionally, the composites were optically transparent and their shape, strength, and flexibility were adjustable by varying the formulation and reaction conditions. These composites of cellulose, glycerol, and citric acid are renewable and biocompatible and have many potential applications as structural materials in packaging, flexible displays, and solar cells.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH, 2018
Keywords
carbohydrates, gels, membranes, nanostructures, polymerization
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-231215 (URN)10.1002/cssc.201800627 (DOI)000434216800017 ()29644799 (PubMedID)2-s2.0-85046335513 (Scopus ID)
Note

QC 20180628

Available from: 2018-06-28 Created: 2018-06-28 Last updated: 2018-12-21Bibliographically 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
Aminzadeh, S., Zhang, L. & Henriksson, G. (2017). A possible explanation for the structural inhomogeneity of lignin in LCC networks. Wood Science and Technology, 51(6), 1365-1376
Open this publication in new window or tab >>A possible explanation for the structural inhomogeneity of lignin in LCC networks
2017 (English)In: Wood Science and Technology, ISSN 0043-7719, E-ISSN 1432-5225, Vol. 51, no 6, p. 1365-1376Article in journal (Refereed) Published
Abstract [en]

Lignin has a very complex structure, and this is partly due to the monomers being connected by many different types of covalent bonds. Furthermore, there are multiple covalent bonds between lignin and polysaccharides in wood, and it is known that the structure of lignin covalently bound to the hemicellulose xylan is different to lignin bound to the hemicellulose glucomannan. Here, synthetic lignin (DHP) is synthesized at different pH and it is shown that lignin made at lower pH has a structure more similar to the lignin bound to xylan, i.e., having higher relative content of beta-O-4 ethers. It is hypothesized that xylan due to its carboxylic acids forms a locally lower pH and thus "direct" the lignin structure to have more beta-O-4 ethers. The biological significance of these results is discussed.

Place, publisher, year, edition, pages
SPRINGER, 2017
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-217020 (URN)10.1007/s00226-017-0941-6 (DOI)000413010900008 ()2-s2.0-85021955403 (Scopus ID)
Note

QC 20171124

Available from: 2017-11-24 Created: 2017-11-24 Last updated: 2018-11-22Bibliographically approved
Zhao, Y., Moser, C., Lindström, M., Henriksson, G. & Li, J. (2017). Film formation and performance of different nanocelluloses obtained from different cellulose sources after different preparation processes. Paper presented at 253rd National Meeting of the American-Chemical-Society (ACS) on Advanced Materials, Technologies, Systems, and Processes, APR 02-06, 2017, San Francisco, CA. Abstracts of Papers of the American Chemical Society, 253
Open this publication in new window or tab >>Film formation and performance of different nanocelluloses obtained from different cellulose sources after different preparation processes
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2017 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 253Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2017
National Category
Organic Chemistry
Identifiers
urn:nbn:se:kth:diva-242597 (URN)000430568503484 ()
Conference
253rd National Meeting of the American-Chemical-Society (ACS) on Advanced Materials, Technologies, Systems, and Processes, APR 02-06, 2017, San Francisco, CA
Note

QC 20190226

Available from: 2019-02-26 Created: 2019-02-26 Last updated: 2019-08-20Bibliographically approved
Giummarella, N., Henriksson, G., Salmén, L. & Lawoko, M. (2017). On the effect of hemicellulose removal on cellulose-lignin interactions. Nordic Pulp & Paper Research Journal, 32(4), 542-549
Open this publication in new window or tab >>On the effect of hemicellulose removal on cellulose-lignin interactions
2017 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 32, no 4, p. 542-549Article in journal (Refereed) Published
Abstract [en]

In a recent study, it was suggested that there could be direct associations between cellulose and lignin in mild alkaline cooked pulps. The observation was based on studies showing that the molecular straining of lignin was similar to that of cellulose. This finding has serious ramifications for technical production of pulps as it could expand on what is known about recalcitrant lignin removal during pulping. Herein, we investigate the possible interaction between cellulose and lignin discussing possible mechanisms involved at the nano-and molecular-scales, and present support for that the removal of hemicellulose by hot water extraction or mild kraft pulping causes strong interactions between lignin and cellulose.

Place, publisher, year, edition, pages
AB Svensk Papperstidning, 2017
Keywords
Cellulose, Lignin Carbohydrate Complexes, Ultrastructure, Hydrophobic interactions, Water extraction, kraft impregnation
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-220877 (URN)10.3183/NPPRJ-2017-32-04-p542-549 (DOI)000418122100006 ()2-s2.0-85052682146 (Scopus ID)
Funder
Knut and Alice Wallenberg Foundation
Note

QC 20180108

Available from: 2018-01-08 Created: 2018-01-08 Last updated: 2018-10-16Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8817-2031

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