Hierarchically porous polystyrene membranes fabricated via a CO₂-expanded liquid selective swelling and in situ hyper-cross-linking method

Abstract

This paper presents a novel, etching-free and versatile preparation methodology, using commercially available polystyrene and a CO2-expanded liquid selective swelling process combined with a hyper-cross-linking reaction.

Control of porosity in hierarchically porous polymers derived from hyper‐crosslinked block polymer precursors

“…The consequent hyper‐crosslinking reaction generated micropores in the meso‐ or macroporous framework, to form hierarchically porous polymers (HPP). Other pore‐forming methods, such as high internal phase emulsion (HIPE), intersphere crosslinking, hard templating, and the self‐assembly of amphiphilic molecules, have been also combined with hyper‐crosslinking to produce HPPs.…”