聚二甲基硅氧烷-聚偏氟乙烯共混膜制备及其渗透蒸发性能研究

发布时间：2018-04-16 09:03

本文选题：聚偏氟乙烯 + 聚二甲基硅氧烷　；参考：《水处理技术》2017年11期

【摘要】：为增强聚偏氟乙烯(PVDF)膜的疏水性能和膜选择性能,在PVDF基膜材料中添加了不同质量的聚二甲基硅氧烷(PDMS),制备了PVDF-PDMS共混复合膜。考察了PDMS、PVDF质量比对复合膜结构性能的影响,并用扫描电子显微镜、比表面积孔径分析仪、接触角测量仪、傅里叶变换红外光谱仪、X射线光电子能谱仪等仪器对复合膜进行了表征;采用低含量苯酚水溶液研究了复合膜的渗透蒸发性能。结果表明,随着PDMS添加量的增加,复合膜的疏水性能、苯酚渗透通量以及分离因子都会逐渐增大,复合膜渗透蒸发性能明显优于未改性膜;在PDMS、PVDF质量比为1:10时,复合膜具有最好的形态结构,表面接触角达到82.92°,苯酚渗透通量为39.31 g/(m~2·h),分离因子增加到4.68。
[Abstract]:In order to enhance the hydrophobic properties and membrane selection of PVDF / PVDF films, PVDF-PDMS blend composite membranes were prepared by adding polydimethylsiloxane (PDMS) with different quality into the PVDF substrate.The effect of mass ratio of PDMS / PVDF on the structure and properties of composite membrane was investigated, and scanning electron microscope, surface area aperture analyzer and contact angle measuring instrument were used.The composite membrane was characterized by Fourier transform infrared spectrometer (FTIR) and X-ray photoelectron spectroscopy (XPS), and the pervaporation performance of the composite membrane was studied by low content phenol aqueous solution.The results showed that the hydrophobicity, phenol flux and separation factor of the composite membrane increased with the increase of the content of PDMS, and the pervaporation performance of the composite membrane was obviously better than that of the unmodified membrane, and when the mass ratio of PDMS and PVDF was 1:10,The composite membrane has the best morphological structure, the surface contact angle is 82.92 掳, the permeation flux of phenol is 39.31 g/(m~2 路h ~ (-1), and the separation factor increases to 4.68.
【作者单位】：哈尔滨工业大学市政环境工程学院;城市水资源开发利用(北方)国家工程研究中心;东北农业大学资源与环境学院;吉林省水利科学研究院;
【基金】：哈尔滨市科技计划项目(MJ20140055)
【分类号】：TQ051.893

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