热致相分离制备聚偏氟乙烯膜  

Formation of poly(vinylidene fluoride) via thermally induced phase separation

作　　者：傅强[1] 潘凯[1] 曹兵[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《化工新型材料》2009年第8期72-74,96,共4页New Chemical Materials

基　　金：教育部科学技术研究重大项目;高效油水分离中空纤维膜的研制(2008-2010)

摘　　要：以聚偏氟乙烯(PVDF)为基材,选用3种稀释剂邻苯二甲酸二甲酯(DMP),间苯二甲酸二甲酯(DMIP),水杨酸甲酯(MS)为稀释剂,通过热致液-固相分离制备了微孔膜。结晶度随PVDF含量的增加先增加后降低,在40%(wt,下同)时结晶度最大。结晶温度随着PVDF-MS,PVDF-DMIP,PVDF-DMP的顺序降低。考察了不同降温条件对聚偏氟乙烯膜的结构的影响。在液-固相分离的前提下,通过不同的降温条件,得到球粒堆积的微观结构。Poty （ vinylidene fluoride） （PVDF） as matrices, dimethyl phthalate （DMP）, dimethyl m-phthalate （DMIP） and methyl salicylate （MS） as diluent, microporous membranes have been prepared via thermally-induced solidliquid phase separation. The crystallinity of PVDF increased with the concentration of PVDF lower than 40wt%, then decreased. The crystallization temperature curve was shifted to a lower temperature in the order PVDF-MS, PVDF-DMIP and PVDF-DMP. The effect of different cooling conditions on the morphology was studied. The resulting membrane had a structure characterized by polymer particles under different cooling conditions via liquid-solid phase separation.

关 键 词：聚偏氟乙烯 热致相分离 邻苯二甲酸二甲酯 间苯二甲酸二甲酯 水杨酸甲酯 

分 类 号：TB383.2[一般工业技术—材料科学与工程]