LAUSR

Abstract Hybrid macroporous adsorbent was synthesized for CO 2 capture, where polyethylenimine (PEI)-enveloped titanium dioxide nanoparticles (nano-TiO 2 ) as well as Span 80 act as a co-emulsifier in the preparation of styrene/divinylbenzene high internal phase emulsion (HIPE). By means of interfacial control in one-step polymerization, the terminals of most PEI chains were embedded into the polymer matrix, and the PEI-enveloped nano-TiO 2 particles were uniformly dispersed on the surface of macropores to form a nanoscale roughness. Compared with the conventionally impregnated PEI in PolyHIPE, more amine groups in the hybrid polyHIPE are exposed to CO 2 molecules, and the leaching and volatilization of PEI have been effectively prevented through the embedding technology, resulting in high adsorption capacity, rapid adsorption/desorption rates, and long-cycle stability in a wide temperature range. On the other hand, the particle-formulated inorganic framework fascinates stress-strain strength and thermal conductivity to accomplish two important prerequisites for industrial application.