CO₂-responsive gels

Abstract

CO2-responsive gels respond to CO2 exposure by either changing their properties or by switching between gel and non-gel states.

CO2-Switchable colloids

“…Finally, CO 2 -switchable nano/ micro-gels have demonstrated remarkable swelling/deswelling behaviour that has yet to be exploited. 9 Another question to consider is what future research would help reduce the environmental and health impacts of CO 2 -switchable colloids. Target areas that have thus far received little attention are: (1) renewably sourced or bio-based CO 2 -switchable colloids; (2) (bio)degradable CO 2 -switchable colloids; and (3) recyclable CO 2 -switchable colloids.…”

“…Finally, CO 2 -switchable nano/micro-gels have demonstrated remarkable swelling/deswelling behaviour that has yet to be exploited. 9…”

“…A related subject that may be of interest to some readers, CO 2 -switchable nano/microgels, is the subject of a recent review by our group and also is not discussed in this article. 9 2. The basics of CO 2 -switching…”

Cellulose-Based Irreversible Hydrogels Used for CO2 Sequestration

“…However, both guanidine- and amidine-based compounds currently lack polymerizable carbon–carbon double bonds, and these corresponding monomers are costly and hard to synthesize, thus no high-molecular-weight polymers containing guanidine or amidine groups are reported so far. In this scenario, much attention has now been shifted to amine monomers, which are readily available, cost-effective, and easily synthesized CO 2 -responsive polymers. − …”

CO2-Responsive Rosin-Based Supramolecular Hydrogels: Diverse Chiral Nanostructures and Their Application in In Situ Synthesis of Chiral Gold Nanoparticles

“…Stimulus-responsive supramolecular hydrogels constructed by low-molecular-weight gelators (LMWGs) have attracted considerable attention because of their diverse aggregates and reversible noncovalent interactions. Although hydrogels that can respond to external stimuli such as CO 2 , , pH, temperature, light, , and redox have been prevalent for decades, CO 2 -responsive hydrogels have gradually become popular because of their easy operation, cleanability, and mild conditions. Typically, diverse aggregates such as nanotubes, vesicles, twisted ribbons, and fibers in hydrogels are attractive for in situ synthesis of nanomaterials. − In addition, noncovalent self-assembly endows supramolecular hydrogels with intriguing adjustability.…”