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Viscoelastic properties of cross-linked polyvinyl alcohol and surface-oxidized cellulose whisker hydrogels
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
2013 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 20, no 3, 1369-1376 p.Article in journal (Refereed) Published
Abstract [en]

Reinforcement of polyvinyl alcohol (PVA) hydrogels was achieved by direct chemical cross-linking of surface modified microcrystalline cellulose (MCC) whiskers with PVA. In order to produce hydrogels, the MCC whiskers were first obtained by TEMPO-mediated oxidation of the cellulose substrate and ultrasonication followed by direct cross-linking to PVA (Mw 98,000) via forming acetal bonds and freeze-thawing. The viscoelastic properties of the produced hydrogels were clearly improved following the chemical cross-linking, featuring values for viscous and elastic moduli G' and GaEuro(3) on the order of 10 kPa, which is particularly interesting for biomedical orthopedic applications.

Place, publisher, year, edition, pages
2013. Vol. 20, no 3, 1369-1376 p.
Keyword [en]
Microcrystalline cellulose, Whiskers, Polyvinyl alcohol, Cross-linking, Cryogels
National Category
Materials Engineering
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
URN: urn:nbn:se:uu:diva-202896DOI: 10.1007/s10570-013-9882-xISI: 000318870500034OAI: oai:DiVA.org:uu-202896DiVA: diva2:634647
Available from: 2013-07-01 Created: 2013-07-01 Last updated: 2017-12-06Bibliographically approved

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Mihranyan, Albert

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