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- 2018
纳米SiO2-氧化石墨烯/聚偏氟乙烯杂化膜的制备及特性
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Abstract:
采用原位水解的方式制备了新型SiO2-氧化石墨烯（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）截留率和污染恢复率等参数。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（1 018 L/（m2·h）），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。 SiO2-GO nanohybrid particle was produced via insitu hydrolysis. Through adding SiO2, GO, SiO2-GO nanohybrid particles and polyvinylpyrrolidone (PVP) respectively, the polyvinylidene fluoride(PVDF) hybrid membrane was first prepared through phase inversion by an immersion precipitation technique. The pure water flux, contact angle, fouling recover rate of PVDF hybrid membrane etc were determined. The results show that the contact angles of SiO2-GO/PVDF-PVP hybrid membrane decrease from 78.4° to 66.02°. The rejection rate of bovine serum albumin (BSA) exceeds 81.5% under high water flux (1 018 L/(m2·h)) and the membrane fouling recovery rate is highest (BSA=78.65%). The results show that the synergistic effect of SiO2-GO nanohybrid particles and PVP improve the properties and antifouling ability of hybrid membrane. 陕西省重点科技创新团队计划（2017KCT-19-01）；陕西省重点产业链（群）项目（2017ZDCXL-GY-07-02）
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