Journal
CELLULOSE
Volume 20, Issue 3, Pages 1369-1376Publisher
SPRINGER
DOI: 10.1007/s10570-013-9882-x
Keywords
Microcrystalline cellulose; Whiskers; Polyvinyl alcohol; Cross-linking; Cryogels
Funding
- FQRNT Centre for Self-assembled Chemical structures Network
- Swedish Research Council
- Swedish Royal Academy of Sciences
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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.
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