三醋酸纤维素正渗透膜制备过程中影响因素的研究  

Investigation of the factors influencing the preparation process of cellulose triacetate forward osmosis membrane

作　　者：刘蕾蕾[1] 王铎[1] 汪锰[1] 高从堦[1] 

机构地区：[1]中国海洋大学化学化工学院,海洋化学理论与工程技术教育部重点实验室,青岛266100

出　　处：《膜科学与技术》2011年第1期77-83,共7页Membrane Science and Technology

基　　金：国家“973”计划项目(2009CB623402);国家自然科学基金项目(20976171)

摘　　要：以三醋酸纤维素为膜材料，以1，4-二氧六环和丙酮为溶剂，乳酸为添加剂，采用相转化法制备三醋酸纤维素正渗透膜．研究了不同支撑材料以及膜制备过程中溶剂挥发时间和添加剂的含量对正渗透膜性能的影响．结果表明，在原料液为0．1mol／L NaCl，汲取液为4mol／L葡萄糖，原料液面向分离层，室温的测试条件下，采用180目（80μm）的筛网为支撑体材料，挥发时间为180S，乳酸含量为6．6％所制备的三醋酸纤维素正渗透膜的水通量为6～7L／（m2·h），NaCl截留率在95％以上．Cellulose triacetate forward osmosis membrane was prepared by phase inversion method. The polymer solution consisted of cellulose triacetate as the membrane material, 1, 4-dioxane and acetone as solvent, and lactic acid as additives. The effects of support materials, solvent evaporation time and the additive content on the membrane performance were investigated. 0.1 mol/L NaCl was used as the feed solution and 4 mol/L glucose was used as the draw solution. The water flux was between 6 and 7 L/（m2 · h） and the rejection for NaCl was above 95%.

关 键 词：三醋酸纤维素 相转化 正渗透膜 膜制备 

分 类 号：TB383.2[一般工业技术—材料科学与工程]