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Cross-linked nanocomposite hydrogels based on cellulose nanocrystals and PVA: Mechanical properties and creep recovery
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4762-2854
2016 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 88, p. 226-233Article in journal (Refereed) Published
Abstract [en]

Cellulose nanocrystal (CNC) reinforced poly(vinyl alcohol) (PVA) hydrogels with a water content of ∼92% were successfully prepared with glutaraldehyde (GA) as a cross-linker. The effects of the CNC content on the thermal stability, swelling ratio and mechanical and viscoelastic properties of the cross-linked hydrogels were investigated. The compressive strength at 60% strain for the hydrogels with 1 wt% CNCs increased by 303%, from 17.5 kPa to 53 kPa. The creep results showed that the addition of CNCs decreased the creep elasticity due to molecular chain restriction. The almost complete strain recovery (∼97%) after fixed load removal for 15 min was observed from the hydrogels with CNCs, compared with 92% strain recovery of the neat cross-linked PVA hydrogels. The incorporation of CNCs did not affect the swelling ratio and thermal stability of the hydrogels. These results suggest the cross-linked CNC-PVA hydrogels have potential for use in biomedical and tissue engineering applications.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 88, p. 226-233
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-8352DOI: 10.1016/j.compositesa.2016.06.002ISI: 000380081600026Scopus ID: 2-s2.0-84973898767Local ID: 6dbf619a-1742-4a40-bdba-37db91a6c2dcOAI: oai:DiVA.org:ltu-8352DiVA, id: diva2:981244
Note

Validerad; 2016; Nivå 2; 20160607 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-01-08Bibliographically approved

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Tanpichai, SupachokOksman, Kristiina

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