ABSTRACT Three soluble hyperbranched polyazomethines containing oligosiloxane end group HBP-PAZ-SiOn were successfully synthesized. HBP-PAZ-SiOns were used as modifiers of ethyl cellulose (EC) and polysulfone (PS) membranes. Blend membranes, HBP-PAZ-SiOn/EC and HBP-PAZ-SiOn/PS were prepared by blending the THF solution of HBP-PAZ-SiOn with ethanol solution of EC and dichloromethane solution of PS, respectively. Surprisingly, the permeabilities for CO2 of the blend membranes were more than 15–16 times higher than those of pure EC and PS membranes without any drop of pemselectivity to N2. This unusual improvement has been achieved by both enhancement of diffusivity for carbon dioxide and nitrogen by the oligosiloxane groups and enhancement of affinity of the amino groups with carbon dioxide at the end groups of HBP-PAZ-SiOn.

中文翻译：

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可溶性低聚硅氧烷封端超支化聚甲亚胺的合成及其在CO2/N2分离膜中的应用


摘要 成功合成了三种含有低聚硅氧烷端基HBP-PAZ-SiOn的可溶性超支化聚偶氮甲碱。 HBP-PAZ-SiOns 用作乙基纤维素 (EC) 和聚砜 (PS) 膜的改性剂。将HBP-PAZ-SiOn的THF溶液分别与EC的乙醇溶液和PS的二氯甲烷溶液共混，制备了共混膜HBP-PAZ-SiOn/EC和HBP-PAZ-SiOn/PS。令人惊讶的是，混合膜的 CO2 渗透率比纯 EC 和 PS 膜高 15-16 倍，而对 N2 的渗透选择性没有任何下降。这种不寻常的改进是通过低聚硅氧烷基团增强二氧化碳和氮气的扩散性以及增强 HBP-PAZ-SiOn 端基处的氨基与二氧化碳的亲和力来实现的。