膜科学与技术

Co3O4-GO/PES共混超滤膜制备及催化清洗性能研究

作者：欧阳赣蔡文倍李登新

单位：东华大学环境科学与工程学院，国家环境保护纺织污染防治工程技术中心，上海 201620

关键词：四氧化三钴；氧化石墨烯；聚醚砜超滤膜；催化清洗

出版年,卷(期):页码： 2016,36(2):34-40

摘要：

以负载有四氧化三钴（Co3O4）的氧化石墨烯（GO）复合材料为添加剂，聚醚砜为膜材料，采用溶剂-非溶剂扩散诱导相分离转化法制备共混超滤膜。考察了添加剂含量对超滤膜的形态结构、亲水性、分离性能和耐污染性能的影响，以及改性膜催化清洗性能和发挥催化清洗功能的最佳条件。结果表明，Co3O4-GO复合材料的掺混使改性膜的亲水性、纯水通量和耐污染性能显著提高，对牛血清白蛋白（BSA）的截留率始终维持在94%以上，尤其当掺混量为1.5 wt.%时，膜的纯水通量由101.1 L?m-2?h-1提高至347.2 L?m-2?h-1；催化清洗试验表明，超滤膜被垃圾渗滤液污染后的通量恢复率随着添加剂掺混量、单过硫酸氢盐（PMS）溶液浓度和浸泡时间的增加而提高，最佳催化清洗条件为：Co3O4-GO掺混量为1.5 wt.%、PMS溶液浓度为5mM，浸泡时间为30min。

In this study, novel polyethersulfone (PES) ultrafiltration membranes blended with cobalt oxide/graphene oxide (Co3O4-GO) nanocomposites were prepared by solvent-non-solvent phase inversion method. Cross section structure, hydrophilicity, permeability and fouling resistance properties were studied to investigate the effect of different content of nanocomposites embedded in polymer matrix on the behavior of modified membranes. Additionally, the catalytic cleaning performance of modified membranes and the optimal condition for catalytic cleaning were also investigated. The experimental results indicated that the hydrophilicity, permeability and antifouling properties were promoted significantly, especially the pure water flux of the hybrid membrane was improved from 101.1 L?m-2?h-1 to 347.9 L?m-2?h-1 comparing with the pristine membrane. On the other hand, the flux recovery ratio after the fouling of ultrafiltration process of landfill leachate was promoted with the increase of blending content of Co3O4-GO, the concentration of monopersulfuric bisulfate (PMS) and membrane immersion time, the optimal cleaning condition was that membrane with 1.5 wt.% nanocomposites, 5 mM PMS and immersing 30 min.

欧阳赣（1990-），男，硕士研究生，研究方向为膜分离技术，E-mail: ouyanggan1023@foxmail.com.通讯作者：E-mail: lidengxin@dhu.edu.cn

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