Fundamental characteristics of sorption, swelling, and permeation of P84 Co-polyimide membranes for pervaporation dehydration of alcohols

Xiangyi Qiao, Tai-Shung Chung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

87 Scopus citations

Abstract

An in-depth study of sorption, swelling, and permeation of aqueous ethanol, 2-propanol (IPA), and tert-butyl alcohol through BTDA-TDI/MDI (P84) co-polyimide membranes has been conducted. The superior separation performance toward aqueous IPA and tert-butyl alcohol mixtures mainly arises from four factors: (1) rigid P84 chains with a small d-space, (2) the lesser affinity between P84 and IPA as well as between P84 and tert-butyl alcohol, (3) a high sorption selectivity, and (4) steric hindrance induced by bulky IPA and tert-butyl alcohol molecules. However, because of severe chain swelling and relaxation in ethanol/water solutions as confirmed by XRD and DSC, P84 performs less impressively for the pervaporation dehydration of ethanol/water mixtures.

Original languageEnglish (US)
Pages (from-to)8938-8943
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume44
Issue number23
DOIs
StatePublished - Nov 9 2005

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

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