Viscoelastic properties of cross-linked polyvinyl alcohol and surface-oxidized cellulose whisker hydrogels

被引：0
|
作者：
Albert Mihranyan
机构：
[1] Uppsala University,Nanotechnology and Functional Materials, Department of Engineering Sciences
来源：
Cellulose | 2013年 / 20卷
关键词：
Microcrystalline cellulose; Whiskers; Polyvinyl alcohol; Cross-linking; Cryogels;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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 G″ on the order of 10 kPa, which is particularly interesting for biomedical orthopedic applications.
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页码：1369 / 1376
页数：7
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