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Combinatorial Methodology for Screening Selectivity in Polymeric Pervaporation Membranes.

Rutvik V Godbole1, Lan Ma1, Michael D Doerfert1

  • 1Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States.

ACS Combinatorial Science
|September 25, 2015
PubMed
Summary

This study introduces a fast screening method for polymeric pervaporation membranes used in alcohol-water separations. The technique efficiently identifies promising materials for separating ethanol and water mixtures.

Keywords:
combinatorial synthesisgelspermeability selectivitypervaporation membranes

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Area of Science:

  • Polymer Science
  • Separation Technology
  • Materials Science

Background:

  • Pervaporation is a key membrane process for separating liquid mixtures.
  • Developing selective polymeric membranes is crucial for efficient alcohol-water separations.
  • Rapid screening methods are needed to accelerate material discovery.

Purpose of the Study:

  • To develop and demonstrate a combinatorial methodology for rapid screening of polymeric pervaporation membrane materials.
  • To evaluate the selectivity of polyacrylate copolymers for ethanol-water separation.
  • To accelerate the discovery of novel membrane materials for pervaporation.

Main Methods:

  • A combinatorial approach was used to prepare a matrix of cross-linked polyacrylate copolymers.
  • Orthogonal variations in hydrophilic (2-hydroxyethyl acrylate) to hydrophobic (n-butyl acrylate) comonomer ratio and cross-linker concentration were explored.
  • Swelling measurements and high-throughput High-Performance Liquid Chromatography (HPLC) were employed to determine equilibrium selectivities and distribution coefficients.

Main Results:

  • The screening methodology successfully identified promising polyacrylate copolymers for ethanol-water separation.
  • Equilibrium selectivities and distribution coefficients were obtained for a range of copolymer compositions.
  • Two selected copolymers were further investigated for their permeability selectivity and ethanol flux.

Conclusions:

  • The described combinatorial methodology offers a rapid and efficient approach for screening pervaporation membrane materials.
  • This technique can significantly accelerate the search for new materials for alcohol-water separations.
  • The methodology is adaptable to various polymer chemistries, highlighting its broad applicability.