ABSTRACT

Novel mixed matrix membranes with various Cloisite®15A in polyimide (PI) matrix were developed for gas separation. The synthesized membranes were characterized by the FE-SEM, XRD, DTG and TEM. According to FE-SEM results, at 3 wt% of Cloisite®15A, the fillers were dispersed homogeneously in the PI polymer matrix. The tensile properties of PI/Cloisite®15A increased gradually with clay content. It was interesting to note that the pure gas selectivity was seen to be increased with decreasing the filler loading. At 1 wt% clay loading, PI/Cloisite®15A nanocomposites showed an increase of 55% in CO₂/CH₄ ideal selectivity over pristine PI membrane.

摘要

开发了在聚酰亚胺（PI）基质中具有15种Cloisite®的新型混合基质膜，用于气体分离。合成的膜通过FE-SEM，XRD，DTG和TEM表征。根据FE-SEM结果，当Cloisite®15A占3 wt％时，填料均匀地分散在PI聚合物基质中。PI /Cloisite®15A的拉伸性能随粘土含量的增加而逐渐增加。有趣的是，随着填料含量的降低，纯气体的选择性有所提高。在粘土含量为1 wt％时，PI /Cloisite®15A纳米复合材料的CO ₂ / CH ₄理想选择性比原始PI膜提高了55％。