Adsorptive capture of CO 2 using amine-based adsorbents is a promising strategy for reducing energy penalty, while the stability of solid amines remains the most critical challenge. In this work, we propose a novel methodology to significantly extend the stability of CO 2 adsorbents. By copolymerizing water-inoil emulsion containing multiple acrylates with rich epoxide groups, we synthesize porous beads with a hydrophobic and robust framework to ensure long-term thermal and hydrothermal stabilities. We then graft tetraethylenepentamine on the framework via ring-opening reaction between the epoxide and amine groups to resist amine leaching and oxidation. Finally, we convert most of the remaining primary amines and some secondary amines of the grafted tetraethylenepentamine to secondary and tertiary ones through epoxide-functionalization to prevent urea formation and sulfur poisoning. With a nitrogen content of 10.0 mmol•g −1 , the adsorbent achieves 2.03 mmol•g −1 CO 2 uptake at 60 °C and, which remains constant when exposed to air at 90 °C for 12 h. After 1000 adsorption/desorption cycles, its adsorption capacity drops by 9.8% in a simulated flue gas containing O 2 , SO 2 , and water steam, showing a long-term lifespan in a complex environment.
Foamed polypropylene (PP) has attracted more and more attention in recent years due to its unique properties, such as heat resistance and high flexural modulus. In this work, foamed PP with excellent properties was successfully fabricated by adding a special foam stabilizer, which was prepared by a simple one-step strategy using fatty acid and amino silicone oil as reactants. The twocomponent stabilizer mixed uniformly with PP and reduced the surface tension during foaming. The foam stabilizer significantly reduced density and cell diameter of the foam. When the amount of foam stabilizer was 1.0 wt%, the density dropped to 0.958 g/cm 3 , about 2.8% lower vs foam generated without stabilizer. The tensile strength increased to 18.4 MPa from 16.1 MPa, and the elongation at break increased to 495% from 328%.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.