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Fe3O4@SiO2-NH2-SO3H复合微球改性阴离子交换膜的制备

作者：彭贵宾¹，²，金雅丽¹，²，徐燕青¹，²，廖俊斌¹，²，阮慧敏¹，²，沈江南，¹，²

单位： 1浙江工业大学化学工程学院，浙江杭州 310014；2浙江工业大学膜分离与水科学技术中心，浙江杭州 310014

关键词：阴离子交换膜；聚多巴胺；磺化复合微球；单价选择性；抗污染性

DOI号：

分类号： 0658. 6+8

出版年,卷(期):页码： 2020,40(5):54-61

摘要：

提出了一种简单的离子交换膜改性方法。将聚多巴胺（PDA）与复合微球（MS）混合，对商业阴离子交换膜进行改性。研究了复合微球（MS）和聚多巴胺（PDA）的加入对单价选择性和抗污染性的影响。将改性膜用于电渗析（ED），MS-PDA膜的渗透选择性是PDA膜的1.46倍。此外，以十二烷基苯磺酸钠（SDBS）为污染物测试抗污染性能。结果表明，经过300 min后MS-PDA膜依旧未被污染，而PDA膜的转变时间仅为53 min，说明聚多巴胺（PDA）与带负电的磺化复合微球（MS）的引入，可制备兼具良好单价选择性和抗污染性的阴离子交换膜，此方法操作简单，为制备单价选择性阴离子交换膜提供了思路和借鉴。

A modified anion exchange membrane was prepared by depositing the dopamine (PDA) and composite microspheres (MS) on commercial anion membranes. The effects of the addition of composite microspheres (MS) on the monovalent selectivity and anti-pollution performance were studied. When the modified membranes were used in ED, the permeability selectivity of MS-PDA membrane was 1.46 times higher than that of the PDA membrane. In addition, using sodium dodecyl benzene sulfonate (SDBS) as the pollutant pollution resistance test the anti-pollution performance. The results show that the MS-PDA membrane was still uncontaminated after 300 min, while the conversion time of PDA membrane was only 53 min, suggesting that the introduction of polydopamine (PDA) and sulfonated composite microspheres (MS) with negative charge can obtain anion exchange membrane with good univalent selectivity and anti-pollution performance.

基金项目：

国家重点研发计划（No. 2017YFC0403701）；国家自然科学基金项目（No. 21676249）；浙江省自然基金项目（No. LQ19B060004）

作者简介：

彭贵宾（1996—），男，江西萍乡，硕士研究生，从事膜分离、电驱动膜技术研究，E-mail：1471159934@qq.com

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