Extensive research has been conducted on a variety of processes for abating the increasing CO₂ emissions which have been causing adverse effects on the environment. Among these, gas separation membranes have the potential to overcome a number of limitations of existing technologies by reducing the cost of operations and providing an efficient, compact module which can be employed for separating CO₂ from natural gas and post‐combustion flue gas streams. Recently, chitosan and its derivatives have proven their ability to form CO₂‐selective facilitated transport membranes through the utilization of the amino group fixed site carriers present in the polymer. Later, the performance of chitosan membrane can be substantially improved by carrier enrichment. This review aims to cover the structure‐property relations of chitosan and its film‐forming derivatives, with a brief discussion of the advantages and challenges in using these polymers. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

中文翻译：

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基于壳聚糖的膜在CO2 / N2分离中的前景：结构-性质关系

为了减少对环境造成不利影响的增加的CO ₂排放，已对各种方法进行了广泛的研究。其中，气体分离膜有潜力通过降低运营成本并提供有效，紧凑的模块来克服现有技术的诸多局限，该模块可用于从天然气和燃烧后烟气中分离出CO ₂。最近，壳聚糖及其衍生物已证明具有形成CO ₂的能力。通过利用聚合物中存在的氨基固定位点载体，选择性促进了转运膜的形成。后来，壳聚糖膜的性能可以通过富集载体而大大提高。这篇综述旨在涵盖壳聚糖及其成膜衍生物的结构-性质关系，并简要讨论了使用这些聚合物的优势和挑战。©2021化学工业协会和John Wiley＆Sons，Ltd.