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OALib Journal期刊
ISSN: 2333-9721
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羧甲基壳聚糖/海藻酸钠半互穿网络水凝胶的制备及性能研究
DOI: 10.3724/SP.J.1105.2014.13260, PP. 361-368
Keywords: 羧甲基壳聚糖,海藻酸钠,京尼平,半互穿,pH敏感性
Abstract:
以羧甲基壳聚糖（CMC）和海藻酸钠（SA）为原料，京尼平（GP）为交联剂，制备具有pH敏感性的CMC/SA半互穿网络（semi-IPN）水凝胶.利用特性黏数、红外光谱对CMC/SA水凝胶的半互穿网络结构及形成机理进行了分析与表征；对水凝胶的力学性能进行了测试；探讨了pH值及交联剂含量对水凝胶溶胀性能的影响.结果表明，京尼平交联的CMC/SA水凝胶具有半互穿网络结构.当w（CMC）w（SA）=55时，CMC/SA水凝胶的断裂强度达到最大值（59MPa），分别比纯的CMC（40MPa）和SA（36MPa）提高了47.5%和63.9%；当SA含量为60%时，CMC/SA水凝胶的断裂伸长率达到最大值（13.0%）.当pH3.0时，溶胀率随pH值的增大而增大，pH=9.0时，溶胀率最大（886%）.京尼平交联的CMC/SA半互穿网络水凝胶具有明显的pH敏感性、溶胀可逆性及对pH的快速响应性.
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