硅橡胶/PVDF中空纤维复合膜制备与膜蒸馏性能研究  

Preparation and performance of silicone rubber/PVDF hollow fiber composite membrane for membrane distillation purpose

作　　者：申丹丹 唐文勇[1,2] 王中阳 刘四华[1,2] 武春瑞 吕晓龙[1,2] SHEN Dandan;TANG Wenyong;WANG Zhongyang;LIU Sihua;WU Chunrui;LYU Xiaolong(State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Polytechnic University,Tianjin 300387,China;Institute of Biological and Chemical Engineering,School of Material Science and Engineering,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387 [2]天津工业大学生物化工研究所,材料科学与工程学院,天津300387

出　　处：《功能材料》2018年第4期4007-4013,共7页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51578376,21576210);天津市重点基金资助项目(15JCZDJC37500)

摘　　要：采用溶液涂覆-固化法制备了硅橡胶/聚偏氟乙烯(PVDF)中空纤维复合膜,实验研究了涂覆次数、硅橡胶溶液浓度、涂覆温度和固化温度等对膜结构与性能的影响。初步探讨了复合膜在处理包含表面活性剂水体过程中膜蒸馏(MD)性能的稳定性。结果表明,利用溶液涂覆-固化的方法,涂覆3次可制得均匀、稳定的复合膜,膜表面的纯水接触角由78°(PVDF膜)提升到149°。在针对含有表面活性剂十二烷基苯磺酸钠(SDBS)料液的膜蒸馏处理过程中,原始PVDF膜在实验进行约20min发生亲水化泄漏;该复合膜在连续2h持续运行实验内,膜蒸馏通量保持在约36.6kg/(m^2·h),产水电导率约为16.0μS/cm。Silicone rubber/polyvinylidene fluoride(PVDF)hollow fiber composite membranes were prepared by solution coating-curing method.The influence of coating times,coating solution concentration,coating and curing temperature on the structure and performance of the membranes were studied.The membrane distillation(MD)performance,especially the stability of the performance in surfactant containing solution treatment was detected.The results showed that uniform silicon-rubber layer was formed after three times of coating process.The pure water contact angle of the membrane was improved from 78°(PVDF membrane)to 149°.When used in MD process for the treatment of solution containing sodium chloride and surfactant(e.g.,sodium dodecyl benzene sulfonate(SDBS)),the virgin PVDF membrane was leaking in about 20 min of experiment.The flux of the composite membrane was kept at about 36.6 kg/(m 2·h)in 2 h of continuous experiment with a permeate conductivity of 16.0μS/cm.

关 键 词：硅橡胶 聚偏氟乙烯 中空纤维复合膜 疏水膜 膜蒸馏 

分 类 号：TQ028.8[化学工程]