Ag_3PO_4改性PVDF超滤膜的结构与性能  

Properties and structure of PVDF membrane modified by Ag_3PO_4 powders

作　　者：周婕[1] 文晨[1] 吴佳朋 肖长发 

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]膜材料与膜过程国家重点实验室培育基地,天津300387

出　　处：《化工学报》2015年第1期471-477,共7页CIESC Journal

基　　金：国家重点基础研究发展计划项目(2012CB722706)~~

摘　　要：将不同量Ag3PO4均匀地分散在聚偏氟乙烯(PVDF)铸膜液中,利用相转化法制备了改性PVDF膜,通过扫描电镜(SEM)、接触角测定、过滤实验和污染性测试等研究了其微结构、分离性和耐污染性等,并考察了膜污染后的清洗效果。结果表明,添加Ag3PO4的PVDF膜具有不同的微结构与性能,当添加1%的Ag3PO4时,膜皮层变薄、微孔数增多,并呈现出最优化的水通量、亲水性、力学性、抗污染能力和截留率等。采用太阳光-水清洗能使改性膜的通量恢复率达到85%以上。PVDF ultrafiltration membranes were prepared by the phase-inversion method with different contents Ag3PO4 powders dispersed uniformly in the PVDF casting solution. The microstructure, separation performance and antifouling ability of such PVDF membrane and modified membranes were investigated using SEM, contact angle, cross flow filtration, and antifouling measurements, and cleaning effect for the fouled membrane was also observed. The modified membranes exhibited differences in microstructure and properties due to a specific content of Ag3PO4 powders addition. At mass fraction 1%Ag3PO4, the thickness of skin layer decreased while fine interfacial micropores increased, meanwhile the modified membranes had excellent water permeability, hydrophilicity, mechanical properties, antifouling ability and elevated retention for humic acid （HA）solution. In addition, sunlight/water cleaning in aeration could effectively recover the flux of PVDF1 membrane to above 85%.

关 键 词：膜 过滤 分离性 Ag3PO4 膜污染 亲水性 

分 类 号：TQ028.8[化学工程]