CO2-switchable membranes: structures, functions, and separation applications in aqueous medium
Membrane separation has become one of the key separation technologies, which play vital roles in food and medicine production, chemical industries, water treatment, etc. Inspired by natural cell membranes with stimuli-responsive channels, artificial stimuli-switchable membranes have drawn growing attention in various fields. Among them, CO2-switchable membranes are highly appealing because of the great features of CO2 as being abundant, nontoxic, environment-friendly, free of contamination in use and good reversibility. In this Highlight article, we review the recent development of CO2-switchable membranes in aqueous medium in separation fields, showcasing applications such as controlled release, oil–water separation, self-cleaning of membranes and size-/charge-based separation. We present the working principles and challenges of CO2-switchable membranes, and also give our opinion on possible opportunities for future research directions and applications.
- This article is part of the themed collections: Journal of Materials Chemistry A Recent Review Articles and Journal of Materials Chemistry A HOT Papers