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采用原位水解的方式制备了新型SiO2-GO纳米杂化颗粒。选择GO,SiO2,SiO2-GO颗粒和聚乙烯吡咯烷酮(PVP)为添加剂,采用浸没沉淀相转化法分别制备了聚偏氟乙烯(PVDF)杂化膜。测定了PVDF杂化膜的纯水通量、膜面接触角、牛血清白蛋白(BSA)截留率、污染恢复率等参数。实验结果表明,SiO2-GO/PVDF-PVP膜的接触角从78.4°减小到66.02°,膜的亲水性能有所提升。同时,SiO2-GO/PVDF-PVP膜的纯水通量最大(1018L/(m2h)),对BSA的截留率达到81.5%,污染恢复率达到了78.65%以上。新型SiO2-GO纳米杂化颗粒协同PVP添加剂增强了PVDF超滤膜的水通量、污染物截留和抗污染特性等综合性能,为传统PVDF有机膜的改性提供了一种新方法。
A new type of SiO2-GO nano-hybrid particles was prepared by in-situ hydrolysis. GO, SiO2, SiO2-GO particles and polyvinylpyrrolidone (PVP) were selected as additives. Polyvinylidene fluoride (PVDF) hybrid membranes were prepared by immersion precipitation phase inversion method. The parameters such as the pure water flux, the contact angle of the membrane surface, the retention rate of bovine serum albumin (BSA), and the recovery rate of pollution were measured. The experimental results show that the contact angle of SiO2-GO / PVDF-PVP film decreases from 78.4 ° to 66.02 °, and the hydrophilicity of the film increases. At the same time, the pure water flux of SiO2-GO / PVDF-PVP membrane was the highest (1018L / (m2h)), the rejection of BSA reached 81.5% and the recovery rate of pollution reached more than 78.65%. The new SiO2-GO hybrid nano-particles and PVP additives enhance the water flux, contaminant retention and anti-pollution properties of PVDF ultrafiltration membrane, which provides a new method for the modification of traditional PVDF organic membrane.