膜科学与技术

高通量聚酰胺反渗透膜的制备

作者：林泽，岳鑫业，潘巧明

单位：杭州水处理技术研究开发中心，浙江杭州 310012

关键词：聚酰胺；反渗透膜；界面聚合；高通量；高截留率；DMI

出版年,卷(期):页码： 2016,36(3):79-85

摘要：

在聚砜超滤膜表面通过水/油两相界面聚合的方法，制备了高通量高截留率的聚酰胺反渗透复合膜。研究了强极性有机相添加剂1,3-二甲基-2-咪唑啉酮（DMI）对聚酰胺反渗透膜结构及性能的影响。采用扫描电子显微镜（SEM）和原子力显微镜（AFM）来对反渗透膜表面结构形貌进行表征，聚酰胺分离层化学结构则通过全反射红外光谱（ATR-FTIR）来进行分析，采用接触角测试仪来评价膜表面亲水性。以500ppm NaCl作为进水溶液，在145 Psi压力下评价了反渗透膜片的分离性能。研究结果显示有机相添加剂DMI可以有效调控反渗透膜表面结构，在不损失盐截留率的前提下显著提高反渗透膜水通量。

A polyamide reverse osmosis composite membrane with high flux was prepared via interfacial polymerization on the polysulphone ultrafiltration membrane. The influence of 1,3-dimethyl-2-imidazoline ketone (DMI) on the structure and performance of polyamide reverse osmosis membrane was studied. The surface morphology of polyamide reverse osmosis membrane was characterized by SEM and AFM, and the structure of membrane was analyzed by ATR-FTIR, the hydrophilic was evaluated by the contact angle meter. The separation performance of the membrane, water flux and salt rejection, were evaluated under operating pressure of 145 Psi using 500 ppm sodium chloride solution. The results indicated that DMI could effectively control the surface morphology of polyamide reverse osmosis membrane, to dramatically enhance the water flux of membrane without decrease the salt rejection.

第一作者信息：林泽（1991-），男，浙江杭州，学士，从事膜材料研究，E-mail：linzenb@163.com，电话：18768196011 通讯作者信息：潘巧明（1974- ），男，教授级高工，E-mail：qiaomingpan@163.com

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