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High Efficiency Gas Permeability Membranes From Ethyl Cellulose Grafted With Ionic Liquids

High Efficiency Gas Permeability Membranes From Ethyl Cellulose Grafted With Ionic Liquids

Jingyu Xu, Hongge Jia, Nan Yang, Qingji Wang, Guoxing Yang, Mingyu Zhang, Shuangping Xu, Yu Zang, Liqun Ma, Pengfei Jiang, Hailiang Zhou, Honghan Wang

Polymers (Basel). 2019 Nov 18;11(11):1900.

PMID: 31752139

Abstract:

Ethyl cellulose was grafted with ionic liquids in optimal yields (62.5-64.1%) and grafting degrees (5.93-7.90%) by the esterification of the hydroxyl groups in ethyl cellulose with the carboxyl groups in ionic liquids. In IR spectra of the ethyl cellulose derivatives exhibited C=O bond stretching vibration peaks at 1760 or 1740 cm-1, confirming the formation of the ester groups and furnishing the evidence of the successful grafting of ethyl cellulose with ionic liquids. The ethyl cellulose grafted with ionic liquids could be formed into membranes by using the casting solution method. The resulting membranes exhibited good membrane forming ability and mechanical properties. The EC grafted with ionic liquids-based membranes demonstrated PCO2/PCH4 separation factors of up to 18.8, whereas the PCO2/PCH4 separation factor of 9.0 was obtained for pure EC membrane (both for CO2/CH4 mixture gas). The membranes also demonstrated an excellent gas permeability coefficient PCO2, up to 199 Barrer, which was higher than pure EC (PCO2 = 46.8 Barrer). Therefore, it can be concluded that the ionic liquids with imidazole groups are immensely useful for improving the gas separation performances of EC membranes.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9004573	Ethyl cellulose		9004-57-3	Price

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