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Soluble polyimides with propeller shape triphenyl core for membrane based gas separation

机译:具有螺旋桨形状三苯基芯的可溶性聚酰亚胺,用于膜基气体分离

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This article reports the synthesis and characterization of a series of new aromatic polyimides (PIs) having bulky tert butyl group containing propeller shaped triphenylamine unit in its structure. The PIs were prepared by the reaction of 4,4-diamino-4-(2,4,6-tri-tert-butylphenoxy) triphenylamine with different commercially available aromatic dianhydrides through the formation of corresponding poly(amic acid)s and subsequent thermal cycloimidization. The PIs showed high glass transition temperature (T-g up to 270 degrees C) and thermal stability (T-d10 up to 475 degrees C). The PI membranes showed good mechanical properties with tensile strength up to 70 MPa, excellent separation performance [P(CO2)=100.8, P(O-2)=40.4 barrer], and good permselectivity [P(CO2)/P(CH4)=50.9, P(O-2)/P(N-2)=7.6]. The membranes exhibited extremely high solubility selectivity for the CO2/CH4 gas pair due to the strong affinity between CO2 and nitrogen atoms of tertiary amine in triphenylamine. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46658.
机译:本文报告了一系列的具有含螺旋桨形状的三苯基胺单元在其结构笨重叔丁基新芳族聚酰亚胺(PIS)的合成和表征。通过使用不同的市售芳族二酐的4,4-二氨基-4-(2,4,6-叔丁基苯氧基苯氧基)三苯胺通过形成相应的聚(酰胺酸)和随后的热量反应来制备PIS环己化。这些PI显示出高的玻璃化转变温度(T-G高达270摄氏度)和热稳定性(T-D10高达475摄氏度)。 PI膜显示出良好的机械性能,抗拉强度高达70MPa,优异的分离性能[P(CO2)= 100.8,P(O-2)= 40.4个除[P(CO2)/ P(CH4)(CH4) = 50.9,p(O-2)/ p(n-2)= 7.6]。由于三苯胺中的叔胺的CO 2和氮原子之间的强亲和力,膜对CO 2 / CH4气体对具有极高的溶解性选择性。 (c)2018 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2018,135,46658。

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