膜科学与技术

膜表面纳米TiO2修饰层的构建与抗蛋白质污染性能

作者：郑细鸣，范荣玉

单位：绿色化工技术福建省高等学校重点实验室，武夷学院生态与资源工程学院

关键词：聚丙烯微孔膜；表面修饰；蛋白质污染；亲水性；纳米二氧化钛

出版年,卷(期):页码： 2018,38(4):8-13

摘要：

采用纳米二氧化钛胶体和多巴胺作为修饰剂，通过多巴胺的氧化自聚将纳米二氧化钛颗粒沉积到聚丙烯微孔膜(MPPM)的表面。采用FTIR和SEM对膜进行了表征，发现修饰后膜表面多孔形态未发生变化，仅在膜表面均匀地负载着大量的纳米TiO2颗粒。静态水接触角及纯水通量测试结果显示，修饰膜具有优异的亲水性，在0.10 MPa下，MPPM的纯水通量为0，而经纳米TiO2修饰后的膜纯水通量可稳定在4625 L/(m2·h)左右。蛋白质静态吸附与蛋白质溶液过滤研究结果表明，修饰膜具有良好的抗蛋白质污染性能，蛋白质溶液通量下降率仅为35%，且膜表面的蛋白质可用水清洗除去，通量恢复率达83%。

Using nano TiO2 colloid and dopamine as modifiers, nano TiO2 particles were uniformly deposited on the surface of microporous polypropylene membrane (MPPM) by oxidation and self polymerization of dopamine. The membranes were characterized with Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results confirmed that the porous morphology of the membranes did not change after modification, and only a large number of nano TiO2 particles were evenly loaded on the membrane surfaces. The test results of static water contact angle and pure water flux show that the modified membranes had excellent hydrophilicity. Under 0.10 MPa, the pure water flux of MPPM was 0, while the pure water flux of the membrane modified by nano TiO2 could be stabilized at 4625 L/(m2·h). The results of protein static adsorption and protein solution filtration show that the modified membrane had good anti protein pollution performance, and the flux decline rate of protein solution was as low as 35%. Moreover, the protein on the membrane surfaces could be removed by water, and the flux recovery rate was as high as 83%.

第一作者简介：郑细鸣(1970–)，男，南靖县人，教授，博士，研究方面：膜表面工程及水处理技术，E-mail: zhengxm70@163.com

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