添加剂PEG对PVDF/SiO_2杂化膜性能的影响  

Effect of additive PEG on the performance of PVDF/SiO_2 hybrid membrane

作　　者：沈惠玲[1,2] 廖桦[1] 肖长发[2] 

机构地区：[1]天津科技大学化工学院,天津300457 [2]天津工业大学材料科学与工程学院,天津300160

出　　处：《膜科学与技术》2010年第1期65-68,77,共5页Membrane Science and Technology

基　　金：国家重点基础研究发展计划(973计划)课题(2006CB708602)

摘　　要：在PVDF/SiO2体系中添加了PEG,利用浸没沉淀相转化法制备了PVDF/SiO2杂化膜,并对膜性能进行测试,采用SEM观察膜表面与断面的微孔结构.结果表明:铸膜液中加入PEG,促进了SiO2在PVDF体系中的分散,增加了界面微孔数量,该膜试样在保持较高截留率的情形下,水通量得到了一定程度的提高.SEM断面照片显示,在PVDF/SiO2体系中加入PEG,制备的PVDF/SiO2杂化膜试样中大孔的数量增多,而且孔壁上细小微孔数量也增多.By mixing PEG into the casting solution, the PVDF/SiO2 hybrid membranes were prepared by means of immerged phase inversion process. The membrane section photos of SEM and properties of the PVDF hybrid membranes were investigated respectively. The results show that the additive of PEG can influence the casting solution of PVDF, it enhances the distribution of SiO2 in the casting solution, and forms fine interracial microp- ores, meanwhile the pure water flux of the membranes are increased to certain degree whereas the retention can keep at a higher level. Mixing PEG in the casting solution, the SEM section photos indicate that there are more finger pores in section of membrane and more micropores in the hole wall.

关 键 词：PVDF SIO2 PEG 杂化膜 

分 类 号：O484.4[理学—固体物理]