单乙醇胺和二氧化碳对聚酰胺反渗透复合膜的影响  

Effects of monoethanolamine and carbon dioxide on morphology and performance of polyamide thin-film composite membrane

作　　者：刘伟良 马晓华[1] LIU Weiliang;MA Xiaohua(State Key Laboratory of Chemical Engineering, Membrane Science and Engineering R&D Laboratory, Chemical Engineering Research Center, East China University of Science and Technology, Shanghai 200237, China)

机构地区：[1]化学工程联合国家重点实验室,华东理工大学化学工程研究所膜科学与工程研发中心,上海200237

出　　处：《膜科学与技术》2020年第6期1-6,共6页Membrane Science and Technology

基　　金：国家自然科学基金项目(21978081)。

摘　　要：聚酰胺反渗透复合膜的分离性能主要由聚酰胺分离层的结构和性能决定.采用纳米发泡的方法调控聚酰胺分离层的微纳米结构,通过在水相中加入乙醇胺调控二氧化碳的溶解度,借以调控聚酰胺分离层的形貌,考察单乙醇胺用量对聚酰胺反渗透复合膜结构和性能的影响.采用扫描电子显微镜、动态接触角测试仪、傅里叶红外光谱和过滤实验对聚酰胺反渗透复合膜的结构和性能进行表征.结果表明,加入一定量的乙醇胺可以有效改变膜的表面形貌,影响其表面性质,1%的添加量可使膜的通量提升31.5%.The separation performance of the reverse osmosis(RO)thin-film composite(TFC)membrane is mainly determined by the structure and property of the polyamide(PA)separation layer.A nanofoaming method was used to adjust the micro-nano structure of the PA separation layer.By adding monoethanolamine(MEA)to the aqueous phase to adjust the solubility of carbon dioxide,the morphology of the PA separation layer was adjusted.The effect of the amount of MEA on the structure and performance of RO membrane was investigated.The surface morphology and separation performance of the RO membrane were characterized by scanning electron microscope,dynamic contact angle tester,fourier infrared spectroscopy and filtering experiments.The results show that the addition of a certain amount of MEA can effectively change the surface morphology of the membrane,affect its surface properties and improve the separation performance.

关 键 词：膜 二氧化碳 界面聚合 酸吸收剂 单乙醇胺 脱盐 

分 类 号：TQ316.4[化学工程—高聚物工业]