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Membranes
|March 6, 2021
PubMed
Summary

Chemical crosslinking of PolyActive™ additives created networks in thin-film composite membranes. This modification doubled CO2 permeance while maintaining CO2/N2 selectivity, enhancing membrane performance for gas separation.

Keywords:
PolyActiveTMgas separationnetwork formationthin film composite membrane

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Membrane Technology

Background:

  • PolyActive™ is a promising material for CO2/N2 separation in thin-film composite membranes (TFCM).
  • Previous research focused on modifying PolyActive™ with low-molecular-weight additives.

Purpose of the Study:

  • To investigate the effect of chemical crosslinking of reactive end-group additives within PolyActive™ TFCM.
  • To understand how embedded networks influence the properties of the polymer matrix and membrane performance.

Main Methods:

  • Chemical crosslinking of additives within the selective layer of TFCM.
  • Characterization using Fourier transform infrared spectroscopy (FTIR), gas transport measurements, differential scanning calorimetry (DSC), and atomic force microscopy (AFM).

Main Results:

  • The crosslinking process formed networks within the polymer matrix.
  • A twofold increase in CO2 permeance was observed.
  • Insignificant losses in CO2/N2 selectivity were recorded.

Conclusions:

  • Chemical crosslinking of additives is an effective strategy to enhance CO2 permeance in PolyActive™ TFCM.
  • The embedded network structure improves gas transport properties without compromising separation performance.
  • This approach offers a promising route for developing advanced membranes for CO2 capture.