Recyclable liquid-like POSS derivatives with designed structures and their potential for CO₂ capture

Six kinds of liquid-like trisilanol isobutyl-POSS derivatives are designed and synthesized to study the influences of their structures on capturing CO₂. The derivatives are different in bonding types, NH content, flow ability, grafting ratio or molecular size. The CO₂ capture property of these derivatives is tested. It is found that bonding types can affect the recycle property, NH content can affect the chemical absorption, molecular size can affect the physical adsorption, and flow ability can affect both chemical absorption and physical adsorption. Furthermore, the physical adsorption is determining factor that cause differences from liquid-like derivatives to traditional amine based solvents CO₂ absorbents.