NA-40成核剂对热致相分离法制备聚偏氟乙烯微孔膜结构和性能的影响  

Effects of Nucleating Agent on Structures and Performances of Poly (Vinylidene Fluoride) Microporous Membranes via Thermally Induced phase Separation(TIPS)

作　　者：陈董根[1] 刘敏[1,2] 许振良[1,2] 杨虎[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室化学工程研究所膜科学与工程研发中心,上海200237 [2]华东理工大学材料科学与工程学院上海市先进聚合物材料重点实验室超细材料制备与应用教育部重点实验室,上海200237

出　　处：《高分子材料科学与工程》2014年第3期158-161,共4页Polymer Materials Science & Engineering

基　　金：上海市科技攻关计划(11DZ1205201);广东省重大科技专项(2011A080403004)

摘　　要：以磷酸三丁酯(TBP)和邻苯二甲酸二(2-乙基己)酯(DEHP)为混合稀释剂,2,2-亚甲基-双(4,6-二叔丁基苯酚)磷酸钠(NA-40)为成核剂,采用热致相分离(TIPS)法制备了聚偏氟乙烯(PVDF)微孔膜,并考察了NA-40含量对PVDF膜结构、泡点压力、最大及平均膜孔径与渗透性能的影响。研究表明,NA-40的加入可抑制成膜过程中大球晶的生长,且随着NA-40含量的增加,膜的最大孔径,平均孔径及纯水通量先减小后增加。当NA-40的质量分数为0.5%时,PVDF膜结构均匀,纯水通量达到1220 L/(m2·h),并具有良好的截留性能。Polyvinylidene fluoride （PVDF） microporous membranes were prepared using tributyl phosphate （TBP）/ di（ethylhexyl） phthalate （DEHP） as dilute mixture and NA-40 as nucleating agent via thermally induced phase separation （TIPS）. The effects of nucleating agent concentration on the structure, bubble point pressure, maximum and mean pore sizes, and permeation properties of the membranes were studied. The results indicate that with the addition of NA-40, the crystallization rate increases and the aggregation of spherulites are suppressed. As the NA-40 concentration increases, the maximum pore sizes, the mean pore sizes and the pure water permeability flux of membranes decrease firstly and then increase. When the mass fraction of NA-40 is 0.5%,the membranes show an uniform structure and homogeneous pore size; the water permeability flux reaches 1220 L/（m2·h）, and the membranes have a good selectivity.

关 键 词：热致相分离 聚偏氟乙烯 成核剂 微孔膜 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]