Highly porous material from poly(S/DVB)polyHIPE modified by layer-by-layer surface modification for CO2 gas adsorption

Abstract

A new type of absorbent for CO2 adsorption was synthesized via emulsion polymerization. The polymer obtained from divinylbezene (DVB) and styrene (S) at ratio of 0:100, 80:20, 20:80. Poly HIPE were prepared using Span 80: CTAB: DDBSS (6.3 wt.%: 0.3 wt.%: 0.4 wt.%) as surfactants. Poly (diallyldimetyl-ammonium chloride) (PDADMAC) and Polystyrenesulfonate (PSS) and Polyethyleneimine (PEI) was used to modify the surface using the layer-by-layer technique to improve polyHIPE for CO2 adsorption; the modified polyHIPE were characterized for phase morphology, surface area, thermal behavior, mechanical properties, and CO2 adsorption by using SEM, N2 adsorption-desorption, TG-DTA, LLOYD universal testing machine, and CO2 adsorption, respectively. Phase morphology of poly(S/DVB) exhibited high amounts of DVB showed small pore size and high surface area in N2 adsorption-desorption testing. The mechanical property, Young's modulus, was increased with increasing amounts of DVB. The sample displayed a mass loss of about 50% and decomposition of the material above 300°C. CO2 adsorption was 0.0002 mmol/g which high amounts of DVB in monomer ratio.CO2 adsorption is poor due to the morphology change after modified the surface and the polyelectrolyte does not take place into the pore but take place on the surface.