膜科学与技术

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Preparation and performance of graphene oxide / silicon oxide composite membrane based on oil and water separation

Authors： YUAN Ruxin, CHEN Wenge, LI Wenqi, LI Yongxuan

Units： School of Materials Science and Engineering, Xi 'an University of Technology, Xi' an 710048, China

KeyWords： Graphene oxide ; oil/water separation ; layered structure ; composite membrane

ClassificationCode：TQ051.893

year,volume(issue):pagination： 2022,42(3):97-105

Abstract：

In order to improve the oil/water separation performance of graphene oxide(GO) membrane, GO/SiO2 composite membrane were obtained by assembling graphene oxide nanosheets with silicon oxide (SiO2) as a modified additive, cellulose microporous filter membrane as the base membrane and using ethylenediamine to crosslink them with the assistance of vacuum filtration, for oil/water separation. The microstructures, crystal structures and roughness of GO/SiO2 composite membrane were investigated by scanning electron microscopy(SEM), X-ray diffraction(XRD) and atomic force microscopy(AFM), respectively. The properties of the hydrophilic, permeability flux, oil/water emulsion separation and recycling uses of GO/SiO2 composite membrane were studied by changing the content of additives. The results show that the GO/SiO2 composite membrane has the optimal performance when the quality ratio of GO and SiO2 is 1:2. SiO2 particles were embedded between the GO nanosheets, with EDA molecules anchored between the adjacent GO nanosheets, forming microporous nanostructures. The pure water flux of composite membrane reached 839 L?m-2?h-1, and the average contact angle reached 55.42°, and the rejection ratio reached 99.4% in different types of oil/water emulsion. The composite membrane maintained the high rejection ratio which was more than 99.6% after six cycles tests.

Funds：

陕西省联合基金项目2019JLM-2 西安市创新项目21XJZZ0042

AuthorIntro：

袁茹欣（1997— ），女，硕士，研究方向为氧化石墨烯在污水处理中的应用

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