杂萘联苯共聚醚砜复合正渗透膜的制备和性能  

Preparation and performance of copoly(phthalazinone biphenyl ether sulfone) composite forward osmosis membranes

作　　者：刘鹏[1] 张守海[1] 王涛[1] 丁蓉[1] 王榛麟 蹇锡高[1] 

机构地区：[1]大连理工大学化工学院高分子材料系,辽宁省高性能树脂工程技术研究中心,辽宁省高分子科学与工程重点实验室,大连116024

出　　处：《膜科学与技术》2016年第4期7-13,18,共8页Membrane Science and Technology

基　　金：大连市科技计划项目(2014J11JH127)

摘　　要：以杂萘联苯共聚醚砜(PPBES)为膜材料制备中空纤维基膜,然后通过界面聚合方法在基膜内腔制备出一种新型聚酰胺复合正渗透中空纤维膜.分别考察铸膜液组分和界面聚合工艺对复合正渗透膜结构和性能的影响.铸膜液中添加乙二醇可改变PPBES中空纤维基膜的结构和性能;PPBES基膜的结构和性能可影响聚酰胺活性层形貌和复合正渗透膜的性能;间苯二胺(MPD)质量分数会改变聚酰胺活性层的表面形貌,进而影响复合正渗透膜的性能.随着MPD质量分数从0.5%升高到2%,复合膜水通量和盐水比都呈现快速下降趋势,但MPD质量分数超过2%时,复合正渗透膜性能变化较小.随着原料液温度从25℃升高到80℃,正渗透膜水通量从20.3L/(m^2·h)快速升高到34.0L/(m^2·h),而盐水比变化较小.新型PPBES复合正渗透中空纤维膜展现出较好的耐热稳定性.Copoly（phthalazinone biphenyl ether sulfone） （PPBES） polymer were used as the membrane materials for the fabrication of hollow fiber substrate membranes. Novel polyamide composite forward osmosis （FO） hollow fiber membranes were fabricated via interfacial polymerization method on the lumen side of the substrate membranes. Effects of casting solution compositions and interracial polymerization preparation techniques on the morphologies and performance of composite FO membranes were investigated, respectively. The addition of glycol in the casting solution changed the structures and performance of PPBES hollow fiber substrate membranes. The structures and performance of PPBE5 substrate membranes affected the morphologies of polyamide active layer and the performance of composite FO membranes. The surface morphologies of the polyamide active layer were altered with the change of metaphenylenediamine （MPD） concentrations, which could affect the performance of composite FO membranes. The water flux and J s （salt flux）/Jv （water flux） ratio of composite membranes decreased significantly when MPD mass fraction varied from 0. 5 % to 2 %, and then changed slightly when the MPD mass fraction exceeded 2 %. The water flux of FO membranes improved significantly from 20. 3 L/（m^2 · h） to 34. 0 L/（m^2 · h） without significant changes of Js/Jv ratio when the feed solution temperature increased from 25 ℃ to 80 ℃. The novel composite FO membrane exhibited good thermal stability.

关 键 词：杂萘联苯共聚醚砜 正渗透 中空纤维 复合膜 界面聚合 

分 类 号：TQ051.893[化学工程]