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TiO2对PVDF超滤膜结构与性能的影响

作者：孙秀丽，李伟英²，文晨³

单位： 1.同济大学环境科学与工程学院，上海 200092；2.同济大学长江水环境教育部重点实验室，上海 200092；3.天津工业大学环境与化学工程学院，天津 300160

关键词： TiO2分散液；聚偏氟乙烯；抗污染性能

DOI号：

分类号： TU991.2

出版年,卷(期):页码： 2011,31(4):17-21

摘要：

实验制备了两种TiO2分散液，并将其填充到聚偏氟乙烯（PVDF）铸膜液中制得PVDF/TiO2杂化膜。考察了分散液填充比率对杂化膜的通量、截留率、接触角等性能的影响，借助X射线衍射（XRD）和扫描电镜（SEM）等技术表征了杂化膜的微观结构。结果表明，两种TiO2分散液均能不同程度地改善膜的性质，且当分散液的填充比率为10%时，杂化膜的各项性能稳定，表面接触角得到有效改良，对牛血清蛋白（BSA）截留率改变较小，杂化膜纯水通量显著提高，最高水通量可达257.87 L/m2•h。XRD和SEM分析的结果表明，TiO2分散液的加入使其羟基数有不同程度的增加，杂化膜表面更加平滑，亲水性改善。

Two kinds of nano-titanium dioxide (TiO2) sols were made in this experiment, and different poly(vinylidene fluoride) (PVDF)/ TiO2 hybrid membranes were prepared with different doses of them as the modifier. The tests, such as membrane flux, retention rate and contact angle, were carried out in order to verify the effects of various kinds and concentrations of nano-TiO2 sol on the PVDF/TiO2 hybrid membrane properties. Some membranes of good proprieties were then chosen, and the structure and micro-morphology of them were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The results showed that both sols can improve the properties of the membranes and the optimal concentration of the nano-TiO2 sol was 10%. The contact angle was significantly lowered (from 83° to 60°), and the water flux of the hybrid membrane (which could reach as high as 257.87 L/m2 h) was improved evidently with little change of the bovine serum albumin interception rate. Besides, results from XRD and SEM showed that PVDF/TiO2 hybrid membranes had more hydroxyls and a smoother surface.

基金项目：

苏州市重点科技支撑项目(ZS0801);国家水体污染控制与治理科技重大专项课题(2008ZX07421-006)

作者简介：

孙秀丽(1986- ),女,山东潍坊人,硕士研究生,研究方向为水处理理论与膜处理技术. 通讯作者：李伟英(1968-),女,博士, 安徽宿州人,副教授,研究方向为水处理理论与膜处理技术, 电话13601895068, E-mail : 123lwyktz@tongji.edu.cn; 文晨(1959-),女,博士,湖南宁乡人,教授,研究方向为膜材料改性与水处理技术, 电话:13512276822, E-mail: wenchen@tjpu.edu.cn

参考文献：

[1] Wang X, Chen C, Liu H, et al. Preparation and characterization of PAA/PVDF membrane-immobilized Pd/Fe nanoparticles for dechlorination of trichloroacetic acid[J]. Water Res, 2008, 42 (18): 4656-4664.
[2] 王湛, 吕亚文, 王淑梅, 等．PVDF／CA共混超虑膜制备及其特性的研究[J]．膜科学与技术, 2002, 22 (6)：4-8.
[3] Xu Z H, Li L, Wu F W, et a1．The application of the modified PVDF ultrafiltration membranes in further purification of Ginkgo billoba extraction[J]．J Membr Sci, 2005, 55(1-2）: 125—131.
[4] 高维珏, 卞晓锴, 陆晓峰, 等. 纳米 TiO2 对不同材料超滤膜结构与性能的影响[J]. 膜科学与技术, 2008, 28 (6): 23-29.
[5] 沈红梅, 俞丽芸, 许振良. "TiO2 溶胶改性 PVDF中空纤维超滤膜的亲水化研究.[J]. 膜科学与技术, 2009,29 (6), 1-4.
[6] Cao X C, Ma J, Shi X H, et al. Effect of TiO2 nanoparticle size on the performance of PVDF membrane[J]. Appl Surf Sci, 2006, 253 (4): 2003-2010.
[7] Lu Y, Yu S L, Chai B X, et al. Effect of nano-sized Al2O3-particle addition on PVDF ultrafiltration membrane performance[J]. J Membr Sci, 2006, 276(1-2): 162-167.
[8] Madaeni S S, Ghaemi N. Characterization of self-cleaning RO membranes coated with TiO2 particles under UV irradiation[J]. 2007, 303(1-2): 221-233.
[9] Bae T H, Tak T M. Effect of TiO2 nanoparticles on fouling mitigation of ultrafiltration membranes for activated sludge filtration[J]. J membr Sci, 2005,249(1-2): 1-8.
[10] Bottino A, Capannelli G, Monticelli O, et al. Poly (vinylidene fluoride) with improved functionalization for membrane production[J], J Membr Sci, 2000, 166(1): 23-29.
[11] F.Q. Wu, S.P. Ruan, et al. Synthesis,Characterization and Photocatalytic Degradation Properties of TiO2 Nanocrystalline[J], .Funct.Mat. 2001,32(1),
[12] 刘青，膜技术与工业发展概况［J］，青海科技，2006，13（6）：31-34
[13] 左丹英，徐又一，张振. 大孔径PVDF平板微孔膜的制备与性能研究[J]. 水处理技术，2008,34（6）8-11.

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