| 纳米SiO2的加入对PVDF/ SiO2超滤膜结构和性能的影响 |
| 作者：张晶1，李雪茹1，樊文玲2，吕权1，李磊1 |
| 单位： 1.南京大学 化学化工学院 化工系，江苏南京 210093；2. 南京中医药大学 药学院，江苏南京 210029 |
| 关键词： 聚偏氟乙烯；纳米二氧化硅；杂化膜 |
| 出版年,卷(期):页码： 2012,32(1):51-54 |
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摘要： |
| 将普通纳米SiO2、疏水纳米SiO2、亲水纳米SiO2分别加入到聚偏氟乙烯（PVDF）铸膜液中，通过相转化法制得PVDF /SiO2杂化超滤膜，重点探讨了SiO2加入量及上述三种类型纳米SiO2对PVDF杂化超滤膜水通量、截留率和抗污染性能的影响。结果表明膜的孔隙率、平均孔径、水通量、截留率和抗污染性随SiO2含量增加而先增大后减少； SiO2含量为2%时，膜水通量由大至小为：普通纳米SiO2杂化膜、疏水纳米SiO2杂化膜、亲水纳米SiO2杂化膜，抗污染性由大至小为：亲水纳米SiO2杂化膜、普通纳米SiO2杂化膜、疏水纳米SiO2杂化膜。 |
| The unmodified, hydrophilic and hydrophobic nano-sized SiO2 were added into the PVDF casting solution respectively, and the PVDF/SiO2 hybrid membranes were prepared by phase inversion method. The effects of SiO2 concentration and the above-mentioned three types of SiO2 on the PVDF membrane performances such as pure water flux, rejection ratio, anti -fouling capability were examined. The experimental results indicated that membrane porosity, mean membrane pore size, pure water flux, rejection ration, anti-fouling capability increased with rising SiO2 concentration firstly and then decreased. Besides, when the SiO2 concentration was 2%, in terms of pure water flux, unmodified nano-sized SiO2 hybrid membrane was the best, followed by hydrophobic nano-sized SiO2 hybrid membrane and hydrophilic nano-sized SiO2 hybrid membrane。Inversely, in terms of anti-fouling capability, hydrophilic nano-sized SiO2 hybrid membrane was the optimal, followed by unmodified nano-sized SiO2 hybrid membrane and hydrophobic nano-sized SiO2 hybrid membrane. |
| 张晶（1988-），女，山西省运城市人，硕士生，主要从事聚偏氟乙烯超滤膜的改性与应用研究。*通讯联系人： 李磊,博士,副教授,主要从事膜分离技术研究。电话025-83596665;E-mail ll-nju@163.com；地址 江苏省南京市汉口路22号南京 |
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参考文献： |
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