丝素蛋白/聚丙烯腈共混膜的制备及性能研究  

Study on preparation and properties of SF/PAN blend membranes

作　　者：张静[1] 肖长发[1] 王健[1] 黄庆林[1] 

机构地区：[1]天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300160

出　　处：《天津工业大学学报》2011年第6期5-8,14,共5页Journal of Tiangong University

基　　金：天津市科技计划资助项目(10SYSYJC27900)

摘　　要：以饱和硫氰酸钠(NaSCN)水溶液为共溶剂制备了不同共混比的丝素蛋白(SF)/聚丙烯腈(PAN)共混膜,用溶度参数法及FTIR研究了SF/PAN共混体系的相容性,分析和讨论了铸膜液共混比、铸膜液温度、凝固浴组成等对膜结构与性能的影响,并用场发射扫描电镜(FESEM)观察了共混膜的表面和断面微观形貌.结果表明:SF与PAN具有部分相容性,其在成膜过程中会产生界面微孔;随共混膜中SF含量增加,共混膜呈孔隙率增大和截留率减小的变化趋势;随铸膜液温度升高,共混膜呈孔隙率和水通量增大的变化趋势;当凝固浴组分为50%乙醇水溶液时,所得共混膜孔结构较为疏松;SF的添加使PAN膜的水接触角明显减小,表明SF可有效改善PAN膜的亲水性.The membranes are prepared from different blend ratios of silk fibroin/polyacrylonitrile （SF/PAN） based on sodium thiocyanate （NaSCN） water solution as co-solvent. The compatibility of SF/PAN is studied by solubility parameter method and FTIR, and the effects of SF/PAN blend ratio, temperature of casting solution, different coagulation baths on blend membranes performance are discussed. The surface and cross-section morphology of the film are analyzed by field emission scanning electron microscope （FESEM）. The results show that ： SF/PAN are incompatible blends, new interface microvoid structure is produced as a result of phase separation in SF/ PAN;the porosity of membrane becomes large or rejection minishes as ratio of SF to SF/PAN rose; the porosity and water flux of membrane increase with the hoist of temperature of casting solution ; the pore structure is more loosen when coagulation bath is 50% ethanol solution but not water; the water contact angle of membrane which contained SF is decreased clearly, so SF can improve hydrophily of PAN membrane effectively.

关 键 词：丝素蛋白 聚丙烯腈 共混膜 相容性 

分 类 号：TS102.528.1[轻工技术与工程—纺织工程] TQ028.8[轻工技术与工程—纺织科学与工程]