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An integrated materials approach to ultrapermeable and ultraselective CO2 polymer membranes

Abstract

A challenge in the design of polymeric membranes for gas separation is the tradeoff between permeability, or how fast gases can flow through the membrane, and selectivity, the ability to separate one gas from another. In general, the more selective the membrane, the more slowly gases can flow through it. Sandru et al. overcame this tradeoff through a layered design. They used a bottom layer of porous polyacrylonitrile that acts as a physical support for the middle layer of either elastomer-like polydimethylsiloxane or glassy-type polytetrafluoroethylene. The authors then grafted a patchy layer of polyamine, which selectively attracts carbon dioxide, thus pulling it into the membrane and leading to much higher separation from nitrogen.
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Category

Academic article

Language

English

Author(s)

Affiliation

  • SINTEF Industry / Biotechnology and Nanomedicine
  • Norwegian University of Science and Technology
  • North Carolina State University

Year

2022

Published in

Science

ISSN

0036-8075

Volume

376

Issue

6588

Page(s)

90 - 94

View this publication at Norwegian Research Information Repository