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一种疏水性MOF涂层不锈钢网的制备及其油水分离性能研究

作者：石荣雪¹，刘克成¹，张立军¹ ，孙墨杰²，祖文轩²

单位： 1. 国网河北省电力有限公司电力科学研究院，石家庄 050021; 2. 东北电力大学化学工程学院，吉林 132012

关键词：超疏水膜；油水分离；金属有机框架

DOI号： 10.16159/j.cnki.issn1007-8924.2025.04.018

分类号： X703; TQ028

出版年,卷(期):页码： 2025,45(4):173-181

摘要：

本研究提出了一种简单的方法制备疏水性金属有机框架（MOF）涂层不锈钢网（SSM），用于高效油水分离。首先，通过多巴胺自聚在不锈钢网表面形成聚多巴胺（PDA）层，随后通过一步水热法将疏水性MOF（UiO-66）生长在PDA层上，并使用十六烷基三甲氧基硅烷（HDTMS）进行疏水修饰，最终获得HDTMS/UiO-66@PDA/SSM超疏水膜。该膜的水接触角达到150.7°，表现出优异的疏水性和自清洁性能。油水分离实验表明，该膜在重力驱动下对多种油水混合物的分离效率在98%以上，油通量最高可达38 216.6 L/(m2·h)。此外，该膜在不同pH环境下表现出良好的稳定性，经过20次循环使用后，分离效率仍保持在96%以上。研究表明，该疏水膜具有高效、稳定和可重复使用的特点，在油水分离方面具有很高的应用价值。

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.

基金项目：

国家电网有限公司科技项目资助（kj2024-042）

作者简介：

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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