Separations

Polyamide–imide membranes with surface immobilized cyclodextrin for butanol isomer separation via pervaporation

  1. Yan Wang,
  2. Tai Shung Chung*,
  3. Huan Wang

Article first published online: 9 JUL 2010

DOI: 10.1002/aic.12360

Issue

AIChE Journal

AIChE Journal

Volume 57, Issue 6, pages 1470–1484, June 2011

Additional Information

How to Cite

Wang, Y., Chung, T. S. and Wang, H. (2011), Polyamide–imide membranes with surface immobilized cyclodextrin for butanol isomer separation via pervaporation. AIChE J., 57: 1470–1484. doi: 10.1002/aic.12360

Author Information

  1. Dept. of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576

*Dept. of Chemical and; Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576

Publication History

  1. Issue published online: 5 MAY 2011
  2. Article first published online: 9 JUL 2010
  3. Manuscript Revised: 24 JUN 2010
  4. Manuscript Received: 20 APR 2010

Funded by

  • A-Star. Grant Numbers: R-398-000-044-305, R-279-000-288-305
  • NRF CRP. Grant Number: R-279-000-311-281

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Keywords:

  • membrane separation;
  • pervaporation;
  • surface grafting;
  • butanol isomer;
  • cyclodextrin

Abstract

A novel cyclodextrin (CD) derivative, m-xylenediamine-β-cyclodextrin (m-XDA-β-CD), has been synthesized and used to graft β-CD on membrane surface for the pervaporation separation of butanol isomers. The reaction mechanisms for the m-XDA-β-CD synthesis and the membrane surface grafting are confirmed by FTIR and TGA. The as-fabricated novel CD-grafted polyamide-imide (PAI) membranes show homogeneous morphology and significant improved separation performance as compared to the unmodified PAI membranes and PAI/CD mixed matrix membranes made of physical blends. The effects of chemical modification time and dope concentration on the asymmetric membrane have been studied. The optimal separation performance can be found with the CD-grafted PAI membrane cast from a 22 wt % dope concentration, which exhibits a total butanol flux of 15 g/m2/h and a separation factor of 2.03. This newly developed membrane with surface-immobilized CD may open new perspective for the development of next-generation high-performance pervaporation membranes for liquid separations. © 2010 American Institute of Chemical Engineers AIChE J, 2011

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