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首页> 外文期刊>Journal of Applied Polymer Science >Second modification of a polyamide membrane surface
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Second modification of a polyamide membrane surface

机译：聚酰胺膜表面的第二次改性

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摘要

The aim of this study was to develop the water flux and antifouling properties of a polyamide (PA) nanofiltration membrane. A nascent PA membrane was prepared with an interfacial polymerization technique and modified with 2,5-diaminobenzene sulfonic acid (2,5-DABSA) as a second modification. The effects of the 2,5-DABSA monomer concentration and the modification time on the membrane performance were investigated. The chemical structure, morphology, roughness, hydrophilicity, molecular weight cutoff, and antifouling properties of the membranes were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force spectroscopy, contact angle measurement, poly(ethylene glycol) tracers, and cetyl trimethyl ammonium bromide filtration, respectively. The PA membrane with optimized performance was shown to have a greater than 44% higher water permeate flux with a change in the salt rejection in the order RNa2SO4>RCaCl2>RNaCl to RNa2SO4>RNaCl>RCaCl2. The improvement of the hydrophilicity led to excellent antifouling properties in the new PA membranes and illustrated a promising and simple method for the fabrication of high-performance PA membranes. (c) 2016 Wiley Periodicals, Inc.
机译：这项研究的目的是开发聚酰胺（PA）纳滤膜的水通量和防污性能。用界面聚合技术制备新生的PA膜，并用2,5-二氨基苯磺酸（2,5-DABSA）进行第二次修饰。研究了2,5-DABSA单体浓度和改性时间对膜性能的影响。膜的化学结构，形态，粗糙度，亲水性，截留分子量和防污性能通过傅里叶变换红外光谱，扫描电子显微镜，原子力光谱，接触角测量，聚乙二醇示踪剂和十六烷基三甲基醚进行表征。分别用溴化铵过滤。表现出最佳性能的PA膜显示出较高的水渗透通量，并且其脱盐率的变化顺序为RNa2SO4> RCaCl2> RNaCl至RNa2SO4> RNaCl> RCaCl2。亲水性的提高导致了新型PA膜具有出色的防污性能，并说明了一种有前途且简单的高性能PA膜的制造方法。 （c）2016年威利期刊有限公司

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