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Hornification of cellulose-rich materials: A kinetically trapped state
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0003-0624-2185
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore.ORCID iD: 0000-0003-4388-8970
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. RISE Research Institutes of Sweden, 11486 Stockholm, Sweden.ORCID iD: 0000-0001-9176-7116
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0001-8622-0386
2023 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 318, article id 121132Article in journal (Refereed) Published
Abstract [en]

The fundamental understanding concerning cellulose-cellulose interactions under wet and dry conditions remains unclear. This is especially true regarding the drying-induced association of cellulose, commonly described as an irreversible phenomenon called hornification. A fundamental understanding of the mechanisms behind hornification would contribute to new drying techniques for cellulose-based materials in the pulp and paper industry while at the same time enhancing material properties and facilitating the recyclability of cellulose-rich materials. In the present work, the irreversible joining of cellulose-rich surfaces has been studied by subjecting cellulose nanofibril (CNF) films to different heat treatments to establish a link between reswelling properties, structural characteristics as well as chemical and mechanical analyses. A heating time/temperature dependence was observed for the reswelling of the CNF films, which is related to the extent of hornification and is different for different chemical compositions of the fibrils. Further, the results indicate that hornification is related to a diffusion process and that the reswellability increases very slowly over long time, indicating that equilibrium is not reached. Hence, hornification is suggested to be a kinetically limited phenomenon governed by non-covalent reversible interactions and a time/temperature dependence on their forming and breaking.

Place, publisher, year, edition, pages
Elsevier BV , 2023. Vol. 318, article id 121132
Keywords [en]
Aggregation, Cellulose nanofibril, Hornification, Kinetics, Swelling
National Category
Materials Chemistry Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-334855DOI: 10.1016/j.carbpol.2023.121132ISI: 001056626000001PubMedID: 37479442Scopus ID: 2-s2.0-85163374088OAI: oai:DiVA.org:kth-334855DiVA, id: diva2:1792048
Note

QC 20230829

Available from: 2023-08-28 Created: 2023-08-28 Last updated: 2023-09-26Bibliographically approved

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Sellman, Farhiya AlexBenselfelt, TobiasLarsson, Per TomasWågberg, Lars

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