中文摘要：

采用微波加热法在α-Al2O3载体表面合成了NaA分子筛膜,通过对其浸渍镀膜及亚胺化处理制备出致密NaA分子筛-聚酰亚胺（PI）复合分离膜。采用XRD、FT-IR、SEM分析手段和气体渗透实验对NaA分子筛-PI复合膜进行了表征。考察了NaA分子筛膜与NaA分子筛-PI复合膜的形貌、结构和渗透性能差异。XRD结果表明,载体表面只有NaA分子筛生成;FT-IR结果表明,NaA分子筛膜表面已成功镀上PI膜;SEM结果显示,NaA分子筛-PI复合膜表面颗粒相互联结呈孪生态,膜厚约10μm,膜层致密、均匀、平整;在不同温度下对H2、O2、N2和C3H8进行气体渗透测试,结果表明,473K条件下NaA分子筛-PI复合膜对H2的渗透率仅7.86×10-8 mol/m2·s·Pa,较NaA分子筛膜低,而H2/C3H8的分离系数则高达17.24,远大于NaA分子筛膜（9.22）。

英文摘要：

The NaA zeolite membrane was synthesized on porous α-Al2O3 disk support via microwave heating method.A dense intergrown NaA zeolite-polyimide（PI） composite membrane of about 10μm in thickness was prepared by dip-coating with polyamic acid solution and imidization process on the NaA zeolite membrane.The composite membrane was characterized by XRD,FT-IR,SEM and gas permeation tests.The differences on morphology,structure and gas permeability between NaA zeolite and NaA zeolite-PI composite membrane were analyzed.XRD results show that only NaA zeolite emerges on the support,and FT-IR results show that PI has been successfully synthesized on NaA zeolite membrane surface.The SEM images show that the particles are twinborn by well intergrowth on the composite membrane surface.Gas permeation tests on H2,O2,N2 and C3H8 under different temperatures display that the permeance of H2 on the NaA zeolite-PI composite membrane at 473K is 7.86×10-8mol/m2·s·Pa which is lower than that（8.21×10-8） of NaA zeolite membrane,and the permselectivity of H2/C3H8 on the NaA zeolite-PI composite membrane is 17.24,much higher than that（9.22） of NaA zeolite membrane.