GPs-PVA/MCE多功能杂化膜的制备及性能

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）。本文考察了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0.15g时制备的杂化膜性能最佳，水通量为11293L/(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50nm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1h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。

Preparation and properties of GPs-PVA/MCE multifunctional hybrid membrane

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 performance of the hybrid membrane was the best with water flux of 11293L/(m²·h·MPa) when the content of GPs was 0.15g. 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 indicated that the removal rate of 50nm polystyrene microspheres and emulsified oil in water could reach 100% and 99.87%, respectively by pore interception. The removal rate of cationic dyes in water could also reach 100% by adsorption. Compared to the original MCE, the removal rate was 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 1h 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.