Effects of polymerization conditions on hydrophilic groups in aromatic polyamide thin films
Effects of polymerization conditions on hydrophilic groups in aromatic polyamide thin films
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DOI：
10.1016/j.memsci.2008.12.055
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发表时间：
2009-03-20
影响因子：
9.5
通讯作者：
Su, Zhaohui
中科院分区：
文献类型：
--
作者：
Jin, Ying;Su, Zhaohui
对于用于反渗透（RO）膜的聚酰胺，侧酸基团的含量对其性能至关重要。采用傅立叶变换红外光谱（FTIR）分析了均苯三甲酸三丁酯（TMC）在己烷中和1，3-苯二胺（MPDA）在水中界面聚合制备的聚酰胺膜中酸含量，并研究了单体浓度、时间和温度等反应条件对膜中酸含量的影响。结果发现，在较高的TMC浓度或较低的MPDA浓度下，更多的侧基酸基团存在于聚酰胺膜中，并且较长的反应时间和较低的温度也有利于游离酸的形成。这些结果可以用界面聚合过程中的单体扩散来解释。这一工作有助于设计和制备具有不同亲水性和目标性能的反渗透膜。(C)2008 Elsevier B. V.保留所有权利。
For polyamide used in reverse osmosis (RO) membranes, the content of pendant acid groups is critical to its performance. In this work, FTIR was used to analyze the acid contents in the polyamide films prepared via interfacial polymerization of trimesic acid trichloride (TMC) in hexane and 1,3-phenylenediamine (MPDA) in water, and the effects of reaction conditions, including monomer concentrations, time, and temperature, were studied. It was found that more pendant acid groups are present in the polyramide film at higher TMC concentrations or lower MPDA concentrations, and longer reaction times and lower temperatures also favor the formation of the free acids. These results can be explained by the monomer diffusion in the interfacial polymerization process. This work may help the design and fabrication of RO membranes with different hydrophilicity and target performance. (C) 2008 Elsevier B.V. All rights reserved.