化学-物理法制备聚乙烯醇/壳聚糖/纳米羟基磷灰石复合水凝胶及其性能

doi:10.3724/SP.J.1095.2013.30051

摘要/Abstract

摘要： 采用化学物理交联法制备了聚乙烯醇/壳聚糖/纳米羟基磷灰石（PVA/CS/n-HA）复合水凝胶材料。通过对比其含水率、拉伸强度、红外光谱和TG谱图，探讨了PVA含量及戊二醛加入量对材料性能的影响。结果表明，m(PVA)∶m（CS+n-HA）=5∶1，戊二醛质量分数为2%时，复合水凝胶材料具有较好的综合性能：含水率为82.0%、拉伸强度为2.14 MPa、断裂伸长率为343.26%；同步热分析表明，25~140 ℃，仅存在水分的蒸发，直至360 ℃材料才发生分解，说明材料的热稳定性良好；红外分析表明，CS与戊二醛发生了交联反应。

关键词: 壳聚糖, 纳米羟基磷灰石, 聚乙烯醇, 化学物理法

Abstract: Polyvinyl alcohol/chitosan/nano-hydroxyapatite(PVA/CS/n-HA) hydrogel was prepared via the chem-physical method. Effects of PVA content and the mass fraction of glutaraldehyde(GA) on the performance of the composite material were studied by testing its moisture content, tensile strength, infrared spectroscopy and TG spectrum. The results showed that when the mass ratio of PVA and CS+n-HA is 5∶1, and the mass fraction of GA is 2%, the composite hydrogel material has an excellent integrated performance. The moisture content, tensile strength, and elongation breakage are 82.0%, 2.14 MPa and 343.26%, respectively. Simultaneous thermal analysis(STA) results show that there is only water evaporation from 25 ℃ to 140 ℃, and the material starts to decompose at 360 ℃, suggesting that the material has a good thermal stability. Infrared analysis results show that there is a cross-linking reaction between CS and GA.

Key words: chitosan, nano-hydroxyapatite, polyvinyl alcohol, chemistry-physical method

中图分类号:

O646

范志恒, 周莉, 欧阳君君, 罗仲宽, 李妙妙. 化学-物理法制备聚乙烯醇/壳聚糖/纳米羟基磷灰石复合水凝胶及其性能[J]. 应用化学, DOI: 10.3724/SP.J.1095.2013.30051.

FAN Zhiheng, ZHOU Li*, OUYANG Junjun, LUO Zhongkuan, LI Miaomiao. Preparation and Performance of Polyvinyl Alcohol/Chitosan/Nano-hydroxyapatite Composite Hydrogel via a Chem-physical Method[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2013.30051.

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