陶瓷纤维过渡层对碳化硅非对称过滤膜的影响  

Effect of ceramic fiber transition layer on the asymmetric filtration membrane of silicon carbide

作　　者：孙扬善[1] 邓湘云[1,2] 王依山[1] 王传方[1] 张小龙[1] 杨学良[1] 刘佳[1] 邵健[1] 杨洁[1] 

机构地区：[1]天津师范大学物理与电子信息学院,天津300387 [2]海南大学热带海岛资源先进材料教育部重点实验室,海口570228

出　　处：《功能材料》2014年第3期20-23,共4页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA03A610)

摘　　要：研究了由莫来石纤维和硅酸铝纤维组成的陶瓷纤维过渡层对高温气体过滤用碳化硅非对称过滤膜的成膜和过滤压降的影响。利用SEM测试了陶瓷纤维过渡层的表面形貌以及非对称过滤膜侧面的形貌。厚度约为60μm的陶瓷纤维过渡层介于支撑体和过滤膜之间,有效阻止了小粒径的过滤膜颗粒进入支撑体孔隙而减小了过滤膜的实际厚度,进而降低了过滤膜的过滤压降。同时陶瓷纤维过渡层还大大提高了成膜过程中过滤膜的均匀性和完整性。The influence of ceramic fiber transition layer composed of mullite fibers and aluminosilicate fibers on the filter pressure drop and deposition of silicon carbide asymmetric filtration membrane used for high-tempera-ture gas filtration were investigated.The surface morphology of the transition layer of ceramic fiber and the side morphology of the asymmetric filter membrane were tested by SEM.The thickness of ceramic fiber transition layer about 60μm between the support and the filtration membrane,which effectively prevent the small particle size of the particles to enter the pores of the supporting body and the actual thickness of the filtration membrane was reduced,thereby reducing the filter pressure drop of the filtration membrane.Ceramic fiber transition layer also greatly improved the uniformity and integrity of the filtration membranes in the film-forming process.

关 键 词：过渡层 碳化硅 过滤膜 过滤压降 

分 类 号：TQ174[化学工程—陶瓷工业]