膜科学与技术

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Fabrication and properties of GO modified PVDF hybrid membrane for high efficiency oil-water separation

Authors： LI Honglin, HAO Yi, SHEN Shusu, ZHOU Xiaoj, BAI Renbi

Units： 1. School of Environmental Science and Engineering，Suzhou University of Science and Technology，Suzhou 215009，China；2. Jiangsu Engineering Research Center of Separation and Purification Materials and Technology，Suzhou 215009， China；3. Jiangsu Collaborative Innovation Center for Technology and Material of Water Treatment ，Suzhou 215009，China

KeyWords： graphene oxide; polyvinylidene fluoride; hybrid membrane; membrane modification; antifouling

ClassificationCode：：TQ028.8

year,volume(issue):pagination： 2022,42(4):73-80

Abstract：

Graphene oxide (GO) is applied as a hydrophilic modifier in the preparation of membranes because of its abundance of hydroxyl and carboxyl groups. In this study, PVDF/AP/GO hybrid membranes with efficient oil/water separation performance were prepared by adding different proportions of GO to a mixture consisting of polyvinylidene fluoride (PVDF) and a triblock copolymer (AP). The membrane performance was found to be the best when the GO was added to 0.20 % (M3), and it had excellent oil rejection rate (R>98.9%) and relative flux recovery rate (>90.7%) in oil/water emulsion separation experiments. In addition, the permeability of M3 is greatly improved, with pure water fluxes as high as 1090 L/(m2.h) and permeability fluxes of 159.1 L/(m2.h). Even after five cycle filtration experiments of oil/water emulsion, R (>96%) and permeation flux (>879 L/(m2.h)) remained at very high levels. Therefore, the hybrid membrane has considerable application prospects in the actual oil/water separation process.

Funds：

国家自然科学基金项目（51478282）,江苏省研究生实践创新计划项目（SJCX21_1402）。

AuthorIntro：

李红林（1997—），女，江苏省连云港市，硕士研究生，研究方向为水污染控制理论与技术

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