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Poly(vinyl alcohol)/Clay-Based Nanocomposite Hydrogels: Swelling Behavior and Characterization

✍ Scribed by Caio M. Paranhos; Bluma G. Soares; Renata N. Oliveira; Luiz A. Pessan

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
196 KB
Volume
292
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

Polymer/clay composite hydrogels were prepared based on PVA hydrogels containing 3–10 wt.‐% MOM. Their microstructure and morphology were studied by FT‐IR, WAXS and SEM, whereas the interactions between MOM and PVA were evaluated by thermal analyses. The swelling ratios for the PVA/MOM hydrogels decrease with increasing MOM content. WAXS results indicate that MOM was intercalates, and DSC results show a strong interaction between PVA and MOM. This interaction results in a stable network, which is confirmed by the elastic modulus and the thermal decomposition behavior of the hydrogels. Therefore, MOM acts as a co‐crosslinker, improving the stability of the network.

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