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Processing strategy for reduced energy demand of nanostructured CNF/clay composites with tailored interfaces
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, Biocomposites. Zhejiang Univ, Coll Chem & Biol Engn, Key Lab Biomass Chem Engn, State Key Lab Chem Engn,Minist Educ, Hangzhou 310027, Peoples R China..ORCID iD: 0000-0002-1336-5119
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0003-2168-4504
Univ Grenoble Alpes, CNRS, CERMAV, F-38000 Grenoble, France..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. RISE Res Inst Sweden, Drottning Kristinas vag 55, S-11428 Stockholm, Sweden..ORCID iD: 0000-0002-0999-6671
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2023 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 312, article id 120788Article in journal (Refereed) Published
Abstract [en]

Nacre-mimicking nanocomposites based on colloidal cellulose nanofibrils (CNFs) and clay nanoparticles show excellent mechanical properties, yet processing typically involves preparation of two colloids followed by a mixing step, which is time- and energy-consuming. In this study, a facile preparation method using low energy kitchen blenders is reported in which CNF disintegration, clay exfoliation and mixing carried out in one step. Compared to composites made from the conventional method, the energy demand is reduced by about 97 %; the composites also show higher strength and work to fracture. Colloidal stability, CNF/clay nanostructure, and CNF/clay orientation are well characterized. The results suggest favorable effects from hemicellulose-rich, negatively charged pulp fibers and corresponding CNFs. CNF disintegration and colloidal stability are facilitated with substantial CNF/clay interfacial interaction. The results show a more sustainable and industrially relevant processing concept for strong CNF/clay nanocomposites.

Place, publisher, year, edition, pages
Elsevier BV , 2023. Vol. 312, article id 120788
Keywords [en]
CNF, clay biocomposites, Cumulative energy demand, Fibrillation, Exfoliation, XRD
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-326051DOI: 10.1016/j.carbpol.2023.120788ISI: 000957252800001PubMedID: 37059528Scopus ID: 2-s2.0-85150391929OAI: oai:DiVA.org:kth-326051DiVA, id: diva2:1752568
Note

QC 20230424

Available from: 2023-04-24 Created: 2023-04-24 Last updated: 2023-04-24Bibliographically approved

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Yang, XuanLi, LengwanReid, Michael S.Berglund, Lars

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