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Preparation of waterborne polyurethane membranes based upon benzoic anhydride polyester polyol and pervaporation performances for benzene/cyclohexane separation

Authors： Chen Yazhong, Zhu Hao, Ye Hui, Yao Lulu, Cui Peng

Units： School of Chemistry and Chemical of Engineering, Hefei University of Technology, Anhui, Hefei, 230009

KeyWords： Anhydride polyester polyol; Waterborne polyurethane membrane; Pervaporation; Benzene/cyclohexane separation; Degree of swelling; Thermal stability

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2017,37(1):51-57

Abstract：

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.

Funds：

国家自然科学基金项目（No.21476055）

AuthorIntro：

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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