聚乙烯醇/凹凸棒黏土纳米复合膜的制备及其性能

摘要

以聚乙烯醇(PVA)和提纯凹凸棒黏土(APT)为原料,采用溶液流延成膜法,制备了系列不同APT含量的PVA/APT纳米复合膜.采用XRD、FTIR和SEM对复合膜的结构进行了表征,测试了复合膜的热性能、力学性能和耐水性能.结果表明,APT可均匀分散在PVA基体中,APT的加入使得PVA的结晶度有所下降但并未改变其晶型.APT与PVA通过氢键作用,改善了复合膜的热稳定性、力学性能和耐水性.当APT含量为4%时,纳米复合膜有最优的性能.%Poly ( vinyl alcohol)/attapulgite ( PVA/APT) nanocomposite films with different APT contents were prepared using film-casting method. The microstructures of the nanocomposite films were investigated using XRD, FTIR and TEM. The thermal properties, mechanical properties and water-resistance of the nanocomposite films were also tested. The experimental results indicated that APT particles were well dispersed in the PVA matrix,and crystal form of PVA was not changed by adding AFT though there was a slight decrease in the crystal degree. Thermal stability, mechanical properties and water-resistance of the nanocomposite films was improved by the hydrogen bonding interaction between PVA molecular chains and APT. When APT content was 4％ , the nanocomposite film had optimum performances.