Covalent Crosslinking of Porous Poly(Ionic Liquid) Membrane via a Triazine Network

TL;DR

This paper presents a method to enhance porous poly(ionic liquid) membranes by covalently cross-linking them with a triazine network, improving stability without altering pore structure, thus broadening their operational environment.

Contribution

It introduces a covalent cross-linking technique for porous poly(ionic liquid) membranes that maintains pore structure while increasing environmental stability.

Findings

Covalent cross-linking does not change pore size or distribution.

Membranes become more stable in high ionic strength salt solutions.

The method broadens the operational environment of the membranes.

Abstract

Porous poly(ionic liquid) membranes that were prepared via electrostatic cross-linking were subsequently covalently cross-linked via formation of a 1,3,5-triazine network. The additional covalent cross-links do not affect the pore size and pore size distribution of the membranes and stabilize them towards salt solutions of high ionic strength, enabling the membranes to work in a broader environmental window.