pH Responsive Carboxymethyl Chitosan/Poly(amidoamine) Molecular Gate Membrane for CO2/N2 Separation,ACS Applied Materials & Interfaces

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pH Responsive Carboxymethyl Chitosan/Poly(amidoamine) Molecular Gate Membrane for CO2/N2 Separation
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-11-01 , DOI: 10.1021/acsami.9b15044
Rajashree Borgohain ₁ , Bishnupada Mandal ₁

Affiliation

Efficient carbon dioxide separation is an emerging field of interest in the era of energy scarcity and environmental calamity. The present study focuses on the versatile aspects of carboxymethyl chitosan and dendrimer in terms of CO₂ separation. A comprehensive study has been accomplished to inspect the physicochemical properties of the prepared membrane. The mixed gas (CO₂/N₂) separation performances have been measured varying the temperature (60–110 °C) and sweep/feedwater flow ratio (0.33–3). The blend membrane containing 10 weight (wt.)% dendrimer presented highest CO₂ permeance of ∼100 GPU and CO₂/N₂ selectivity ∼149 on maintenance of sweep/feedwater flow ratio 2.33 and 1.67, respectively, at an operating temperature of 90 °C. The remarkable performance displayed by the membrane has been explained with reference to the dendrimer molecular gate mechanism and the salting out effect offered by carboxymethyl chitosan matrix.

中文翻译：

pH响应型羧甲基壳聚糖/聚（酰胺基）分子门膜用于CO ₂ / N ₂分离

在能源短缺和环境灾难的时代，有效的二氧化碳分离是一个新兴的关注领域。本研究侧重于就CO ₂分离而言，羧甲基壳聚糖和树状聚合物的多方面性。已经完成了一项全面的研究，以检查所制备膜的理化性质。测量了混合气体（CO ₂ / N ₂）的分离性能，该分离性能随温度（60–110°C）和吹扫/给水流量比（0.33–3）的变化而变化。含有10％（重量）树枝状聚合物的共混膜的最高CO ₂透过率约为100 GPU和CO ₂ / N ₂在90°C的工作温度下，分别保持清水/给水流量比2.33和1.67时的选择性〜149。膜的显着性能已参考树状大分子的分子门作用机理和羧甲基壳聚糖基质提供的盐析作用进行了解释。

更新日期：2019-11-01

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