膜科学与技术

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Preparation of a hydrophobic MOF coated stainless steel mesh
and its oil-water separation performance

Authors： SHI Rongxue1, LIU Kecheng1, ZHANG Lijun1, SUN Mojie2, ZU Wenxuan2

Units： 1. State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, China; 2. College of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China

KeyWords： superhydrophobic membrane; separation of oil and water; metal-organic framework

ClassificationCode：X703; TQ028

year,volume(issue):pagination： 2025,45(4):173-181

Abstract：

A simple method for preparing hydrophobic metal-organic frame (MOF) coated stainless steel mesh (SSM) for efficient oil-water separation was proposed in this paper. Firstly, a polydopamine (PDA) layer was formed on the surface of stainless steel mesh by dopamine self-polymerization. Then, the hydrophobic MOF (UiO66) was grown on the PDA layer by one-step hydrothermal method, and the hydrophobic modification was carried out with hexadecyltrimethoxylsilane (HDTMS). Finally, the HDTMS/UiO66@PDA/SSM superhydrophobic membrane was obtained. The membrane had a water contact angle of 150.7°, showing excellent hydrophobicity and self-cleaning properties. The oil-water separation experiments showed that the separation efficiency of the membrane was more than 98% and the oil flux was as high as 38 216.6 L/(m2·h). In addition, the membrane showed good stability in different pH environments, and the separation efficiency remained above 96% after 20 cycles of use. The results show that the hydrophobic membrane possesses the characteristics of high efficiency, stability and reusability, and has excellent application value in oil-water separation.

Funds：

国家电网有限公司科技项目资助（kj2024-042）

AuthorIntro：

石荣雪（1989-），女，河北柏乡人，博士，高级工程师，主要从事电力用油性能检测与分析技术研究

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