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首页> 外文期刊>Journal of Applied Polymer Science >Increasing the performance of asymmetric pervaporation membranes for the separation of methanol/methyl-tert-butyl ether mixtures by the introduction of sulfonated polyimide into the poly(amide-imide) matrix
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Increasing the performance of asymmetric pervaporation membranes for the separation of methanol/methyl-tert-butyl ether mixtures by the introduction of sulfonated polyimide into the poly(amide-imide) matrix

机译：通过将磺化聚酰亚胺引入聚（酰胺 - 酰亚胺）基质中，提高不对称釜膜膜的性能对甲醇/甲基 - 叔丁基醚混合物分离的性能

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摘要

A series of novel asymmetric membranes from polymer composites of poly(amide-imide) with various content of sulfonated polyimide (1-6 wt%) was obtained through the nonsolvent-induced phase separation process. Selective transport properties of the obtained materials were investigated in terms of pervaporation separation of methanol/methyl-tert-butyl ether mixtures at different temperatures. The introduction of the sulfonated polyimide to the poly(amide-imide) matrix leads to a significant increase in membrane flux and an overall decrease in the process selectivity. Composite membranes having 1 wt% sulfonated polyimide in the matrix showed increased values of membrane flux (0.960 kg m(-2)h(-1)in comparison with 0.682 kg m(-2)h(-1)for unmodified membranes at 40 degrees C, 10 wt% methanol), while having similar selectivity values (79.2 wt% methanol in permeate in comparison with 82 wt% for unmodified membranes at 40 degrees C, 10 wt% methanol). Modified membrane showed the highest separation factor of 147 while separating methanol from its 3 wt% mixture with methyl-tert butyl ether at 52 degrees C with the overall flux of 1.01 kg m(-2)h(-1). A semiempirical mathematical model was developed and applied to test the efficiency of obtained membranes in the hybrid process of methanol/methyl-tert-butyl ether mixtures separation.
机译：采用非溶剂诱导相分离法，由不同磺化聚酰亚胺含量（1-6 wt%）的聚酰胺-酰亚胺聚合物复合材料制备了一系列新型不对称膜。通过在不同温度下对甲醇/甲基叔丁基醚混合物的渗透汽化分离，研究了所得材料的选择性传输特性。在聚酰胺-酰亚胺基体中引入磺化聚酰亚胺会导致膜通量显著增加，并且工艺选择性总体降低。基质中含有1 wt%磺化聚酰亚胺的复合膜显示出膜通量（0.960 kg m（-2）h（-1）的增加值，相比之下，40℃下未改性膜的膜通量（0.682 kg m（-2）h（-1）为10 wt%甲醇），同时具有相似的选择性值（与40℃下未改性膜的82 wt%甲醇相比，渗透液中的甲醇含量为79.2 wt%）。改性膜在52℃下，总通量为1.01kg m（-2）h（-1）时，从其与甲基叔丁基醚的3 wt%混合物中分离甲醇时，显示出最高的分离因子147。建立了一个半经验数学模型，并将其应用于甲醇/甲基叔丁基醚混合物分离的混合过程中，测试了所得膜的效率。

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