University of Oulu

Tanpichai, S., Oksman, K. (2016) Cross-linked nanocomposite hydrogels based on cellulose nanocrystals and PVA: Mechanical properties and creep recovery. Composites Part A: Applied Science and Manufacturing, 88, 226-233. doi:10.1016/j.compositesa.2016.06.002

Cross-linked nanocomposite hydrogels based on cellulose nanocrystals and PVA : mechanical properties and creep recovery

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Author: Tanpichai, Supachok1,2; Oksman, Kristiina1,3
Organizations: 1Division of Materials Science, Luleå University of Technology
2Learning Institute, King Mongkut’s University of Technology Thonburi
3Fibre and Particle Engineering, University of Oulu
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.8 MB)
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Language: English
Published: Elsevier, 2016
Publish Date: 2019-03-06


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.

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Series: Composites. Part A, Applied science and manufacturing
ISSN: 1359-835X
ISSN-E: 1878-5840
ISSN-L: 1359-835X
Volume: 88
Pages: 226 - 233
DOI: 10.1016/j.compositesa.2016.06.002
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: The financial support from the Kempe Foundations, Sweden, is gratefully acknowledged.
Copyright information: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license