掺杂无机纳米粒子的阿魏酸分子印迹复合膜的制备

发布时间：2018-03-24 03:20

本文选题：分子印迹复合膜　切入点：纳米粒子　出处：《高分子材料科学与工程》2017年04期

【摘要】：分子印迹膜是一种兼具分子印迹技术与膜分离技术双重优点的新兴技术,但由于有机膜的力学强度较小,在分离过程中容易使印迹孔穴的空间变形和互补官能团位置的失稳,使得其分离效率大大降低。文中使用紫外光引发原位聚合的方法,以聚偏氟乙烯(PVDF)作为支撑膜,将无机纳米材料和铸膜液共混制备了含有无机纳米材料的阿魏酸分子印迹复合膜。利用红外光谱和扫描电镜测试了膜的结构和表面形貌,发现纳米粒子是以纯物理方式共混的,且都分散在孔的周围,有利于维持膜的孔穴结构。通过平板超滤装置对改性膜的分离性能、水通量和承压能力进行了研究,结果表明,添加质量分数0.5%18 nm TiO_2的改性膜性能最好,承压能力在0.4 MPa以上,分离因子在3.4左右,水通量为6696 L/(m~2·h)。
[Abstract]:Molecularly imprinted membrane is a new technology with both advantages of molecular imprinting technology and membrane separation technology. However, due to the small mechanical strength of organic membrane, it is easy to make the space deformation of imprinted pores and the instability of complementary functional groups in the separation process. The separation efficiency of PVDF was greatly reduced. In this paper, PVDF was used as the supporting membrane for in situ polymerization initiated by ultraviolet light. Ferulic acid molecularly imprinted composite films containing inorganic nanomaterials were prepared by blending inorganic nanomaterials with casting solution. The structure and surface morphology of the membranes were measured by infrared spectroscopy and scanning electron microscopy. It was found that nano-particles were blended in a pure physical manner. The separation performance, water flux and pressure bearing capacity of the modified membrane were studied by using a flat plate ultrafiltration device. The results showed that the modified membrane had the best performance by adding 0.5 nm TiO_2 by mass fraction. The pressure bearing capacity is more than 0.4 MPa, the separation factor is about 3.4, and the water flux is 6696 L/(m~2 路h ~ (-1).
【作者单位】：西南交通大学生命科学与工程学院;
【分类号】：TQ051.893

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