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苯酐聚酯型水性聚氨酯渗透汽化膜制备及性能

作者：陈亚中，朱昊，姚路路，叶辉，崔鹏

单位：合肥工业大学化学与化工学院，安徽省合肥市，230009

关键词：苯酐聚酯多元醇；水性聚氨酯膜；渗透汽化；苯/环己烷分离；溶胀度；热稳定性

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2017,37(1):51-57

摘要：

以聚邻苯二甲酸-1, 6-己二醇酯二醇(PH-56)为软段，异佛尔酮二异氰酸酯(IPDI)、1, 4-丁二醇（BDO）和乙二胺（EDA）为硬段，合成了系列软段中含有苯环结构的苯酐聚酯型水性聚氨酯(WPU)膜。采用傅里叶变换红外光谱(FTIR)、热重分析(TGA)等对膜进行了表征。对于苯/环己烷混合液（50/50 wt.%, 50℃），测定膜的吸附分离性能和渗透汽化分离性能，并与软段不含苯环的聚己二酸-1,6-己二醇酯二醇(PHA-2000)的脂肪族聚酯型水性聚氨酯膜进行了比较。结果表明，含有苯环结构的PH-56为软段的膜比PHA-2000为软段的膜热稳定性和分离性能更好；软段为PH-56的膜在环己烷中几乎不溶胀，且当膜结构中软段含量从55.0 wt.%增加到73.6 wt.%，渗透汽化分离因子从6.90缓慢减小为4.91，而通量从6.91 kg·μm·m-2·h-1明显增加到23.8 kg·μm·m-2·h-1。

A series of waterborne polyurethane membranes with different kinds of soft segments of different contents were successfully synthesized using polyphthalic acid-1, 6-glycol polyester diol (PH-56) or polyhexamethylene adipate glycol (PHA-2000) as soft segment, butanediol (BDO) and ethanediamine (EDA) as hard segment. The membranes were characterized using FT-IR, TGA, adsorption and pervaporation performance for benzene/cyclohexane (50/50 in wt. %) in order to probe the influence of content of benzene ring structure in soft segment. The results indicated that thermal stability and selectivity of PH-based membrane were better than PHA-based membrane. When the content of PH-56 increased from 55.0% to 73.6%,the degree of swelling increased gradually, the permeation flux rapidly increased from 6.91kg•μm/(m2•h) to 23.8 kg•μm/(m2•h), separation factor slowly decreased from 6.90 to 4.91 and almost no swelling in cyclohexane.

基金项目：

国家自然科学基金项目（No.21476055）

作者简介：

第一作者简介：陈亚中，男，（1977—），博士，副教授，主要从事膜分离技术和多相催化研究。 *通讯联系人：崔鹏，教授，主要从事膜分离过程与装备，脱硫脱硝研究，Email: cuipeng@hfut.edu.cn

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