SiO2短纤维陶瓷膜制备与气体过滤性能  

Preparation of SiO2 short fiber ceramic membrane and gas filtration performance

作　　者：宋鑫颖 金江[1] SONG Xinying;JIN Jiang(College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, China)

机构地区：[1]南京工业大学材料科学与工程学院

出　　处：《南京工业大学学报（自然科学版）》2019年第4期429-433,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏高校优势学科建设工程

摘　　要：采用浸浆成型法制备气固分离用SiO2短纤维陶瓷膜,研究涂膜前后样品的过滤阻力、滤后气体含尘量(VFPM2.5)和循环再生性能。对涂膜液的固含量和纤维添加量进行考察,确定适宜的涂膜液制备参数,进而研究浸浆时间和烧成温度对膜过滤性能的影响,通过扫描电子显微镜(SEM)观察样品表面形貌。结果表明:适宜的涂膜液固含量为10%~12.5%,纤维添加量为30%;涂膜过程中,适宜的浸浆时间为60s,样品的最佳烧成温度为950℃,保温时间为2.5h;由以上实验条件制备的纤维陶瓷膜过滤效率高且循环再生性能良好。涂膜后样品的孔径明显减小,短纤维完全地覆盖在支撑体表面形成具有3D纤维网络状结构的膜层,膜层厚度为25~30μm。The SiO 2 short fiber ceramic membranes for gas-solid separation were prepared by dip-coating method. The solid content and addition amount of short fibers in the coating solution were determined to obtain the appropriate preparation parameter for coating. The effect of the dip-coating time and the firing temperature on the membrane filtration performance was investigated. The surface morphology of the sample was observed by scanning electron microscopy (SEM). The filter resistance, the value of the fine particulate matter (VFPM 2.5 ) and regeneration performance of short fiber membrane were detected. Results shoued that the suitable solid content for the coating suspension was determined to be 10%-12.5%, fiber addition was 30%. The dip-coating time was 60 s. The sintering temperature was determined to be 950℃ with the insulation time of 2.5 h. The results demonstrated that the membrane prepared with short fiber showed higher filter efficiency and better regeneration performance. The observation showed that the short fibers covered the entire suface of the support uniformly. While the short fibers built channels on the support surface and form a 3D fiber network with small pore size membrance. The thickness of the membrances was 25~30μm.

关 键 词：多孔陶瓷膜 短纤维 气固分离 过滤阻力 滤后气体含尘量 

分 类 号：TQ174[化学工程—陶瓷工业]