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

摘要： 地聚物微纳米粒子（GPs）经聚乙烯醇（PVA）修饰后，采用真空抽滤法将其组装在混合纤维素基膜（MCE）表面，得到多功能地聚物颗粒-聚乙烯醇/混合纤维素杂化膜（GPs-PVA/MCE）。考察了GPs的添加量对杂化膜结构和性能的影响，通过SEM、FTIR、AFM、XRD等表征杂化膜的结构。结果表明GPs添加量为0.15 g时制备的杂化膜性能最佳，水通量为11293 L/(m2·h·MPa)。该多功能杂化膜对不同污染物均表现出优异的去除性能：通过孔道截留作用可去除水中100%的50 nm聚苯乙烯微球和99.87%的乳化油；通过吸附作用亦可去除水中100%的阳离子型染料；比原始MCE膜分别提升了528.54%、25.78%、90.96%。特别是在连续处理含油乳液时，该杂化膜使用1 h后通量仅降低了21.70%，远低于MCE膜的95.70%，说明其抗污染性能得到显著提升，显示出良好的应用潜力。

关键词: 地聚物微纳米颗粒, 聚乙烯醇, 杂化膜, 染料