Polyimide Polydimethylsiloxane Triblock Copolymers for Thin Film Composite Gas Separation Membranes

被引:35
作者
Gurr, Paul A. [1 ,2 ]
Scofield, Joel M. P. [1 ,2 ]
Kim, Jinguk [1 ,2 ]
Fu, Qiang [1 ,2 ]
Kentish, Sandra E. [1 ]
Qiao, Greg G. [1 ,2 ]
机构
[1] Univ Melbourne, Cooperat Res Ctr Greenhouse Gas Technol, Dept Chem & Biomol Engn, Melbourne, Vic 3010, Australia
[2] Univ Melbourne, Dept Chem & Biomol Engn, Polymer Sci Grp, Melbourne, Vic 3010, Australia
基金
澳大利亚研究理事会;
关键词
block copolymer; click chemistry; poly(dimethylsiloxane); polyimide; thin film composite membrane; CARBON-DIOXIDE; PLASTICIZATION RESISTANCE; INTRINSIC MICROPOROSITY; TRANSPORT-PROPERTIES; PERFORMANCE; PERMEATION; POLYMERS; PERMSELECTIVITY; PERMEABILITY; DIFFUSIVITY;
D O I
10.1002/pola.27401
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
This article demonstrates the successful fabrication of thin-film-composite (TFC) membranes containing well-defined soft-hard-soft triblock copolymers. Based on hard polyimide (PI) and soft polydimethylsiloxane (PDMS), these triblock copolymers (PDMS-b-PI-b-PDMS), were prepared via condensation polymerization, and end-group allylic functionalization to prepare the polyimide component and subsequent click coupling with the soft azido functionalized PDMS component. The selective layer consisted of pure PDMS-b-PI-b-PDMS copolymers which were cast onto a precast crosslinked-PDMS gutter layer which in turn was cast onto a porous polyacrylonitrile coated substrate. The TFC membranes' gas transport properties, primarily for the separation of carbon dioxide (CO2) from nitrogen (N-2), were determined at 35 degrees C and at a feed pressure of 2 atm. The TFC membranes showed improvements in gas permselectivity with increasing PDMS weight fraction. These results demonstrate the ability for glassy, hard polymer components to be coated onto otherwise incompatible surfaces of highly permeable soft TFC substrates through covalent coupling. (c) 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 3372-3382
引用
收藏
页码:3372 / 3382
页数:11
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