关键词: 地聚物微纳米颗粒, 聚乙烯醇, 杂化膜, 染料

Abstract: A multifunctional hybrid membrane was obtained by assembling of Geopolymer nanoparticles (GPs) and polyvinyl alcohol (PVA) on the surface of mixed cellulose membrane (MCE) through vacuum filtration.The effects of particle size and amount of GPs on the performance of hybrid membrane were investigated. The results showed that the hybrid membrane with the dosage of 0.15 g GPs had a highest. Water flux of 11293 L/(m2·h·MPa). The structure of the hybrid membrane was characterized by SEM, FTIR, AFM and XRD, and the removal performance of the hybrid membrane for different pollutants was investigated. The results showed that the removal rate of 50 nm polystyrene microspheres and emulsified oil in water could reach 100% and 99.87% respectively through pore interception; the removal rate of cationic dyes in water could also reach 100% through adsorption; compared to the original MCE, the removal rate is increased by 528.54%, 25.78% and 90.96% respectively. When the hybrid membrane was used to filter the oil emulsion in a continuous mode, the fluxes decreased only by 21.70% after 1 h operation, while the flux of MCE decreased by 95.70%. The results implied the good antifouling performance of the hybrid membrane, which accordingly had a great potential for practical application in water purification.

Key words: Geopolymer nanoparticles, polyvinyl alcohol, hybrid membrane, dye