Stability-enhanced (Cu-, Zn-)MOFs via (Cu, Zn)S composite strategy: A promising approach for oil-water separation

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-10-30 DOI:10.1016/j.surfcoat.2024.131316

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引用次数: 0

Abstract

The application of metal-organic frameworks (MOFs) in the field of oil-water separation is developing rapidly, but the challenges of poor water stability, poor scalability and durability still limit its practical application. In this study, two environmentally friendly and non-toxic superhydrophobic (Cu, Zn)S/(Cu-, Zn-)MOFs@stearic acid (CuS/Cu-MOFs@SA and ZnS/Zn-MOFs@SA) coatings were successfully prepared by hydrothermal method combined with dip coating method, with a water contact angle (WCA) of >165°. Through the synergistic effect with stearic acid (SA), the (Cu-, Zn-)MOFs coating composited with CuS and ZnS exhibits excellent durability in extreme environments. This synergistic effect significantly improves the mechanical stability and durability of the coating, allowing it to maintain a WCA of >155° after friction, kneading, tape stripping and ultrasonic treatment. However, CuS/Cu-MOFs@SA coating is significantly superior to ZnS/Zn-MOFs@SA coating in terms of chemical stability (acid-base-salt environment) and self-cleaning ability due to the different ligands used in the preparation process and the formation of particle structure. Significantly improved its durability and reliability in oil-water separation. The separation efficiency of the coating is as high as 98.7 %, and it remains above 97.8 % after 12 times of repeated use. This study provides a new strategy and important reference for the development of superhydrophobic MOFs coatings and oil-water separation materials with high stability, wear resistance and corrosion resistance.

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通过(Cu, Zn)S复合策略增强(Cu, Zn-)MOFs 的稳定性：有望实现油水分离的方法

金属有机框架（MOFs）在油水分离领域的应用发展迅速，但其水稳定性差、可扩展性差和耐久性差等难题仍限制了其实际应用。本研究采用水热法结合浸涂法成功制备了两种环保无毒的超疏水（Cu, Zn）S/（Cu-, Zn-）MOFs@硬脂酸（CuS/Cu-MOFs@SA 和 ZnS/Zn-MOFs@SA）涂层，其水接触角（WCA）大于 165°。通过与硬脂酸（SA）的协同作用，与 CuS 和 ZnS 复合的（Cu-, Zn-）MOFs 涂层在极端环境中表现出优异的耐久性。这种协同效应大大提高了涂层的机械稳定性和耐久性，使其在经过摩擦、揉捏、胶带剥离和超声波处理后仍能保持 >155° 的 WCA。然而，由于制备过程中使用的配体不同以及颗粒结构的形成，CuS/Cu-MOFs@SA 涂层在化学稳定性（酸碱盐环境）和自清洁能力方面明显优于 ZnS/Zn-MOFs@SA。大大提高了其在油水分离方面的耐久性和可靠性。涂层的分离效率高达 98.7%，重复使用 12 次后仍保持在 97.8% 以上。该研究为开发具有高稳定性、耐磨性和耐腐蚀性的超疏水 MOFs 涂层和油水分离材料提供了新的策略和重要参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.