Rational Design of Halloysite Surface Chemistry for High Performance Nanotube-Thin Film Nanocomposite Gas Separation Membranes

ACS Applied Materials & Interfaces
Ehsan ChehraziMohammad Karimi

Abstract

The interfacial region has a critical role in determining the gas separation properties of nanofiller-containing membranes. However, the effects of surface chemistry of nanofillers on gas separation performance of thin film nanocomposite (TFN) membranes, prepared by interfacial polymerization method, have been rarely in-depth studied. In this work, pristine and three differently surface modified halloysite nanotubes (HNTs), by non- (SHNT), moderately- (ASHNT) or highly-CO2-philic (SFHNT) agents, are embedded in the polyamide top layer of thin film nanocomposite (TFN) membranes for CO2/N2 and CO2/CH4 separations. Trimethoxyoctyl silane, 3-(2-aminoethylaminopropyl)trimethoxysilane and poly (styrenesulfonic acid) are used as modifying agents to quantitatively investigate the effects of interfacial interactions between the polyamide and HNTs on the gas permeation of TFNs. This allows us to provide an interfacial design strategy to fabricate high-performance gas separation membranes. Pure gas permeations conducted on the TFNs at the feed gas pressure of 10 bar showed that CO2 permeance, CO2/N2 and CO2/CH4 selectivities were increased by 145%, 130% and 108%, respectively, after addition of 0.05 w/v% of sulfonated HNTs. The experiment...Continue Reading

References

Jun 17, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Mary L LindEric M V Hoek
Oct 20, 2011·Journal of the American Chemical Society·Weigang LuHong-Cai Zhou
May 19, 2012·Advanced Materials·Shichun LiShichang Wang
Oct 11, 2016·ACS Applied Materials & Interfaces·Haiyang ZhangXueqin Li
Oct 7, 2017·ACS Applied Materials & Interfaces·Ehsan ChehraziMohammad Karimi
May 23, 2018·ACS Applied Materials & Interfaces·Yatao ZhangVicki Chen
Dec 21, 2019·ACS Applied Materials & Interfaces·Aylin KertikIvo F J Vankelecom

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