發(fā)布時(shí)間：2018-03-24 03:20

  本文選題：分子印跡復(fù)合膜　切入點(diǎn)：納米粒子　出處：《高分子材料科學(xué)與工程》2017年04期

【摘要】：分子印跡膜是一種兼具分子印跡技術(shù)與膜分離技術(shù)雙重優(yōu)點(diǎn)的新興技術(shù),但由于有機(jī)膜的力學(xué)強(qiáng)度較小,在分離過程中容易使印跡孔穴的空間變形和互補(bǔ)官能團(tuán)位置的失穩(wěn),使得其分離效率大大降低。文中使用紫外光引發(fā)原位聚合的方法,以聚偏氟乙烯(PVDF)作為支撐膜,將無機(jī)納米材料和鑄膜液共混制備了含有無機(jī)納米材料的阿魏酸分子印跡復(fù)合膜。利用紅外光譜和掃描電鏡測試了膜的結(jié)構(gòu)和表面形貌,發(fā)現(xiàn)納米粒子是以純物理方式共混的,且都分散在孔的周圍,有利于維持膜的孔穴結(jié)構(gòu)。通過平板超濾裝置對改性膜的分離性能、水通量和承壓能力進(jìn)行了研究,結(jié)果表明,添加質(zhì)量分?jǐn)?shù)0.5%18 nm TiO_2的改性膜性能最好,承壓能力在0.4 MPa以上,分離因子在3.4左右,水通量為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).
【作者單位】： 西南交通大學(xué)生命科學(xué)與工程學(xué)院;
【分類號】：TQ051.893

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