Journal
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS
Volume 55, Issue 5, Pages 518-531Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00222348.2016.1171068
Keywords
mechanical properties; nanocrystalline cellulose; nanocomposite hydrogel; polyvinyl alcohol; swelling behavior; thermal properties
Categories
Funding
- Natural Science Foundation of Jiangsu Province [BK20140967]
- National Natural Science Foundation of China [20904021, 21104068]
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Chemically crosslinked polyvinyl alcohol (PVA)/carboxylated nanocry-stalline cellulose (PVA/CNCC) nanocomposite hydrogel films were fabricated by film-casting of PVA/CNCC mixture solutions and subsequent thermal-curing of the PVA with the CNCC. Gel fractions of the hydrogel films were measured to confirm the occurrence of crosslinking. Morphologies of the hydrogel films were characterized by polarized light microscopy and scanning electron microscopy (SEM). Thermal properties, swelling behavior and mechanical properties of the hydrogel films were investigated to evaluate the influence of CNCC content (10 approximate to 30% of PVA mass). Equilibrium water content of the hydrogel films was in the range of 40 approximate to 49%. At swelling equilibrium, the hydrogel films could be stretched to 3 approximate to 3.4times their original length, and their tensile strength was in the range of 7.9 approximate to 11.6MPa. The results show that the PVA/CNCC nanocomposite hydrogel films were both extensible and highly tough.
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