Macroporous thermoset monoliths from glycidyl methacrylate (GMA)-based high internal phase emulsions (HIPEs): Effect of cellulose nanocrystals (CNCs) as filler - Functionalization and removal of Cr(III) from aqueous solutions

Authors : Burcu KEKEVİ, Ali EŞLEK, Emine Hilal MERT

Pages : 358-368

Doi:10.35208/ert.973855

View : 9 | Download : 9

Publication Date : 2021-12-31

Article Type : Research Paper

Abstract :Macroporous foams having 80 vol % of nominal porosity were synthesized by the copolymerization crosslinking of glycidyl methacrylate insert ignore into journalissuearticles values(GMA); based high internal phase emulsions insert ignore into journalissuearticles values(HIPEs);. To alter the mechanical and thermal properties, cellulose nanocrystals insert ignore into journalissuearticles values(CNCs); were used as filler. For this purpose, CNCs were added to the continuous oil phase during emulsification process at a loading rate of 1, 5 or 7 wt %. Consequently, composite foams were obtained by purification of the polymerized HIPEs insert ignore into journalissuearticles values(polyHIPEs);. The effect of CNCs on the morphological and mechanical properties was investigated. It was found that CNCs have a significant influence on the thermal stability and the compressive strength of the obtained foams. In the end, the neat polyHIPE foam and the polyHIPE/CNC composite foam with 1 wt % of CNC were post-functionalized by reacting phenylimidazole insert ignore into journalissuearticles values(PIAL); with the epoxy ring of the GMA units. Resulting amine functional foams and the neat foam were utilized in Crinsert ignore into journalissuearticles values(III); removal from aqueous solutions. It was demonstrated that amine functional foams have a great potential as sorbent materials. The results also showed that the existence of CNCs decreased the performance for removing Crinsert ignore into journalissuearticles values(III); ions. Nevertheless, functionalization by PIAL significantly improved the selectivity of Crinsert ignore into journalissuearticles values(III); in comperasion with the neat polyHIPE foam.
Keywords : Amine functionalization, chrome III, removal, CNC, GMA, macroporous foam