以聚偏氟乙烯/聚甲基丙烯酸甲酯/聚醚砜(PVDF/PMMA/PES)为三元共混体系,采用浸没沉淀法制备共混超滤膜,以期改善PVDF 膜的亲水性能,提高其抗污染性。结果表明,当PVDF:PMMA:PES 的质量比为85:10:5,80:15:5,75:15:10 及70:20:10 时,共混体系相容性较好,且所制备的膜亲水性较好。当PVDF:PMMA:PES 的质量比为70:20:10 时,水通量为43 L·m-2·h-1、孔隙率为73%,前进角为75.88°,后退角为20.22°。
For improving the hydrophily and the anti-fouling performance of the polyvinylidene fluoride (PVDF) membrane, the PVDF/polymethyl methacryla (PMMA)/polyether sulfone (PES) blend membrane is prepared by the immersing precipitation. It is shown that the ternary system has a good compatibility when the ratio of PVDF/PMMA/PES is 85:10:5, 80:15:5, 75:15:10 and 70:20:10. Additionally, the hydrophilicity of those membranes is improved. The optimized PVDF/PMMA/PES blending ratio is 70:20:10. Under this condition, the water flux is 43 L·m-2·h-1, the porosity is 73%, the advancing contact angle is 75.88°, and the receding contact angle is 20.22°.
[1] Maghsoud Z, Famili M H N, Madaeni S S, et al. Preparation of polyvinylchloride membranes from solvent mixture by immersion precipitation[J]. Journal of Applied Polymer Science, 2014, 131(8): 2-6.
[2] Ye Q, Cheng L, Zhang L, et al. Preparation of symmetric network PVDF membranes for protein adsorption via vapor- induced phase separation[J]. Journal of Macromolecular Science, Part B, 2011, 50(10): 2004-2022.
[3] Zhao C, Xue J, Ran F, et al. Modification of polyethersulfone membranesa review of methods[J]. Progress in Materials Science, 2013, 58(1): 76- 150.
[4] 徐晶晶, 王军, 罗文华, 等. PVC/PVDF/PMMA共混膜的研制[J]. 膜科 学与技术, 2011, 31(4): 1-5. Xu Jinjin, Wang Jun, Luo Wenhua, et al. Study of the PVC/PVDF/ PMMA blend membrane[J]. Membrane Science and Technology, 2011, 31(4): 1-5.
[5] Bae T H, Tak T M. Effect of TiO2 nanoparticles on fouling mitigation of ultrafiltration membranes for activated sludge filtration[J]. Journal of Membrane Science, 2005, 249(1): 1-8.
[6] Ochoa N A, Masuelli M, Marchese J, et al. Effect of hydrophilicity on fouling of an emulsified oil wastewater with PVDF/PMMA membranes[J]. Journal of Membrane Science, 2003, 226(1): 203-211.
[7] 詹世平, 王玉静, 黄星, 等. 基于三维溶参数的PVDF/PVA共混体系的 相容性口[J]. 塑料, 2012, 41(1): 61-63. Zhan Shiping,Wang Yujing,Huang Xing, et al. Compatibility prediction and characterization of PVDF/PVA blend based on three-dimensional solubility parameters[J]. Plastics, 2012, 41(1): 61-63.
