PVDF/编织管中空纤维复合膜的制备及其性能研究  

STUDY ON THE PREPARATION AND PROPERTIES OF PVDF/WOVEN TUBAL HOLLOW FIBER COMPOSITE MEMBRANE

作　　者：容志勇[1] 王磊[1] 陈立成[2] 张颖[1] 王旭东[1] 黄丹曦[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,710055 [2]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《水处理技术》2013年第10期67-71,共5页Technology of Water Treatment

基　　金：国家自然科学基金项目(51008243;51178378);陕西省教育厅专项(2013JK0884);陕西省科技统筹创新工程计划(2012KTCL03-06)

摘　　要：以纤维编织管为支撑层,通过涂覆-浸没沉淀相转化技术,制备了超高强度、大通量的PVDF/编织管中空纤维复合膜,考察了铸膜液中PVDF和添加剂PVP含量等对膜性能的影响。结果显示,随铸膜液中PVDF含量增加,复合膜纯水通量下降,爆破强度增加,平均孔径减小;PVP的质量分数从2%增加至10%,膜通量呈现降低趋势,但爆破压力先增后减;当PVDF、PVP的质量分数分别为8%、6%时,复合膜纯水通量达4 300 L/(m2·h),爆破压力为0.32 MPa。研究范围内,复合膜孔隙率始终保持在45%以上,爆破压力高于0.30 MPa,且由于编织管的存在,而使复合膜的拉伸强度很高,显示了较好的过滤性能;添加PVP和PVA较PEG在膜性能方面的贡献更突出。PVDF/woven tubal hollow fiber composite membrane with high strength and water flux were prepared using fiber woven tubal for support layer through the coating and phase separation technology. The effect of PVDF and PVP concentration in casting solution on membrane performance were studied. With the increase of PVDF concentration in casting solution, the water flux and average pore size of composite membrane decreased, while burst pressure increased. PVP increased from 2% to 10%, the water flux reduced, but burst pressure first increased and then decreased. When the PVDF is 8%, PVP is 6%, the membrane water flux exceed 4 300/J（m2.h）, burst pressure exceed 0.32 MPa. In the research, the porosity of composite membrane always above 45%, burst pressure is higher than 0.30 MPa, the tensile strengths is very high under the action of woven tubal. At last, the membrane performance that adding PVP arid PVA is more outstanding than PEG.

关 键 词：纤维编织管 聚偏氟乙烯 铸膜液 中空纤维复合膜 

分 类 号：TQ028.8[化学工程]