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Journal of Polymer Research

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01-01-2014 | Original Paper

Improving CO₂ separation performance of the polyethylene glycol (PEG)/polytrifluoropropylsiloxane (PTFPMS) blend composite membrane

Authors: Fei Nie, Gaohong He, Wei Zhao, Jia Ju, Yuanfa Liu, Yan Dai

Published in: Journal of Polymer Research | Issue 1/2014

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Abstract

Polyethylene glycol (PEG) as a promoting material for CO₂ separation performance of a composite membrane is introduced into the polytrifluoropropylmethylsiloxane (PTFPMS) network to form a blend selective layer coated on a porous polyetherimide (PEI) support membrane. The maximum blend ratio of PEG to PTFMS in mass is determined for PEG-400, PEG-600, and PEG-1000 at 0.5, 0.2 and 0.2 from the blend solution status observed by an optical microscope. The miscibility of PEG and PTFPMS is verified from one peak of the blend film in DSC characterization. Furthermore, the interaction between PEG and PTFPMS is van der Waals force from the decreasing strength of ether group in ATR-FTIR analysis. The stability of the PEG/PTFPMS blend composite membrane is investigated with pure N₂, O₂, and CO₂ permeation experiments under the transmembrane pressure difference up to 1.0 MPa. The N₂ permeation rate of the PEG400/PTFPMS blend composite membrane with a blend ratio of 0.2 is 2.11 GPU, while the O₂/N₂ and CO₂/N₂ selectivities are improved to 2.67 and 26.67, respectively, which are higher than those of pure PTFPMS composite membrane that is 2.2 and 13.79, respectively.

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Title: Improving CO2 separation performance of the polyethylene glycol (PEG)/polytrifluoropropylsiloxane (PTFPMS) blend composite membrane
Authors: Fei Nie
Gaohong He
Wei Zhao
Jia Ju
Yuanfa Liu
Yan Dai
Publication date: 01-01-2014
Publisher: Springer Netherlands
Published in: Journal of Polymer Research / Issue 1/2014
Print ISSN: 1022-9760
Electronic ISSN: 1572-8935
DOI: https://doi.org/10.1007/s10965-013-0319-x

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