膜科学与技术

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

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.

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

参考文献：

[1] Li J, Chen C, Han B, et al. Laboratory and pilot-scale study on dehydration of benzene by pervaporation [J]. J Membr Sci, 2002, 203 (1): 127–136.
[2] 叶宏，李继定，林阳政，等. PEA型聚氨酯的制备及渗透汽化苯/环己烷的分离性能[J]高分子材料科学与工程.2009, 25(3):103–106.
[3] Gorrasi G, Tortora M, et al. Synthesis and physical properties of layered silicates/ polyurethane nanocomposites [J]. J Polym Sci B Polym Phys 2005; 43 (18): 2454–2467.
[4] Miller C B A, Koenig J L. A review of polymer dissolution [J]. Prog Polym Sci, 2003, 28 (8):1223–1270.
[5] Wolińska-Grabczyk A. Effect of the hard segment domains on the permeation and separation ability of the polyurethane-based membranes in benzene/cyclohexane separation by pervaporation [J]. J Membr Sci 2006, 282(1):225–236.
[6] 赵渠森. 先进复合材料手册[M] . 北京: 机械工业出版社, 2003.
[7] Mulder M. Basic Principles of Membrane Technology [M].Kluwer Academic Publishers,1996, 2:159.
[8] An Q F, Qian J W, et al. Polyacrylonitrile-block-poly(methyl acrylate) membranes 2:Swelling behavior and pervaporation performance for separating benzene/cyclohexane [J]. J Membr Sci, 2008, 313(1):60–67.
[9] Lu L, Sun H, Peng F, et al. Novel graphite-filled PVA/CS hybrid membrane for pervaporation of benzene/cyclohexane mixtures[J]. J Membr Sci, 2006, 281(1-2):245-252.
[10] Maji S, Banerjee S. Synthesis and characterization of new meta connecting semifluorinated poly(ether amide)s and their pervaporation properties for benzene/cyclohexane mixtures[J]. J Membr Sci, 2010, 360(1-2):380–388.
[11] 刘兵兵, 曹义鸣, 李雄岩,等. 聚乙烯醇/壳聚糖共混膜渗透汽化性能研究[J]. 膜科学与技术, 2007, 27(4):37–41.
[12] 许戈文.水性聚氨酯材料[M].北京：化学工业出版社，2006.12:181.
[13] 孟令芝，龚淑玲，何永炳.有机波谱分析[M].武汉大学出版社，2009,3:285.
[14] Yoshitake N, Furukawa M. Thermal degradation mechanism of α, γ-diphenyl alkyl allophanate as a model polyurethane by pyrolysis-high-resolution gas chromatography/FT-IR [J]. J. Anal. Appl. Pyrolysis, 1995, 33, (1): 269–281.
[15] 叶宏，李继定，林阳政，等.聚氨酯脲和聚氨酯酰亚胺膜的制备与渗透汽化芳烃/烷烃分离性能研究[J].膜科学与技术, 2009, 29(2):40–46.
[16] Wang H, Lin X, Kazuhiro T, et al. Preparation of plasma-grafted polymer membranes and their morphology and pervaporation properties toward benzene/cyclohexane mixtures [J]. J Polym Sci Pol Chem, 1998, 36(13): 2247–2259.
[17] Yamasaki A, Shinbo T, Mizoguchi K. Pervaporation of benzene/cyclohexane and benzene/n-hexane mixtures through PVA membranes [J]. J Appl Polym Sci, 1997, 64(6):1061–1065.

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