In this work, the high molecular weight poly (ethylene oxide) (PEO) was cross-linked under UV irradiation to decrease its crystallinity in order to prepare a high-performance CO₂-selective membrane. Poly (ethylene glycol) diacrylate (PEGDA) containing CO₂-philic ether oxygen group was used as both photo-initiator and cross-linking agent. It was found that the crystallinity degree from 82.4% for the neat PEO membrane decreased to 65.4% for the cross-linked PEO membrane by the proposed cross-linking technique. The observations indicated that the structural and gas separation properties of the cross-linked PEO membranes strongly depend on the PEGDA concentration and UV irradiation time. When the PEGDA concentration was between 3 and 7 %wt and at UV irradiation time of 30 min, the prepared membrane overcame Robeson upper bound and indicated a fairly good separation performance in the case of CO₂ separation from N₂, compared to the similar cross-linked PEG-based membranes in the literature.

在这项工作中，高分子量聚环氧乙烷（PEO）在紫外线照射下交联以降低其结晶度，从而制备出高性能的CO ₂选择性膜。含CO _2的聚（乙二醇）二丙烯酸酯（PEGDA）-亲醚氧基团既用作光引发剂又用作交联剂。发现通过所提出的交联技术，纯PEO膜的结晶度从82.4％降低至交联PEO膜的65.4％。观察结果表明，交联的PEO膜的结构和气体分离特性在很大程度上取决于PEGDA浓度和UV照射时间。当PEGDA浓度在3％至7％wt之间且在紫外线照射时间为30分钟时，与类似的交叉反应相比，所制备的膜克服了Robeson上限，并且在从N ₂分离CO ₂的情况下显示出相当好的分离性能。文献中的基于PEG的膜。