PVA/ZSM-5分子筛复合膜的制备与性能研究

Fabrication and Property of PVA/ZSM-5 Zeolite Composite Membranes

目的以聚乙烯醇(PVA)为基体材料,添加ZSM-5沸石分子筛和富马酸交联剂制备出一系列的复合膜,研究分子筛含量对复合膜性能的影响。方法用流延法制备复合膜,进行X射线衍射分析和扫描电镜分析,测定复合膜的拉伸性能、耐水溶胀性、透光率与雾度。结果经富马酸交联后PVA薄膜的拉伸强度和耐水溶性得到了明显改善,随着分子筛含量的增多,复合膜的拉伸强度逐渐减小,分子筛的加入对复合膜的溶胀度和透光性都有降低作用。结论从综合测定结果来看,ZSM-5分子筛质量分数为5%时的复合膜具有相对较好的性能。

A series of composite membranes were prepared with poly（vinyl alcohol） as substrate material and ZSM-5zeolite particles and fumaric acid as crosslinking agents, and the effect of zeolite content on properties of composite membranes was studied. The composite membranes were fabricated by solution casting method, and examined by X-ray diffraction analysis and scanning electron microscope analysis, determining the tensile properties, water swelling,simultaneous light transmittance and haze. After cross-linked with fumaric acid, the tensile strength and water resistance properties of the PVA membranes have obviously been modified but the membrane tensile strength gradually decreased as the zeolite content increased. The addition of ZSM-5 zeolites has reduced the degree of swelling and light transmittance of the membranes. The composite membrane with 5 wt% of ZSM-5 zeolite content had relatively better properties based on comprehensive measurement results.