Preparation of MOF-based superhydrophobic composite coatings with anti-corrosion and self-cleaning properties

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-09-18 DOI:10.1016/j.surfcoat.2025.132691

Xiaoru Hao , Haowen Ji , Longxiang Xu , Zhihao Cheng , Chaobin Dang , Ruirui Wang , Chunxiao Yue

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Abstract

To enhance the resistance to corrosion of metals, a hierarchically structured superhydrophobic coating fabricated from MOF(ZIF-67) nanoparticles and polyurethane resin was created. The ZIF-67 nanoparticles were modified by dodecyltrimethoxysilane (DTMS) and lauric acid (LA), and the superhydrophobic composite coating was prepared using the spraying method. The prepared ZIF-67/DTMS/LA/PU superhydrophobic composite coatings exhibited excellent hydrophobicity (WCA = 157.5°), self-cleaning, and corrosion resistance and remained superhydrophobic after 12 days of immersion in 3.5 wt% NaCl solution. It is noteworthy that after being immersed in a 3.5 wt% NaCl solution for 168 h, the impedance modulus of the ZIF-67/DTMS/PU coating still exceeded the initial impedance modulus of the 7075aluminum alloy after immersion, indicating that the ZIF-67/DTMS/PU coating can provide long-term protection for the aluminum alloy. The coating offers a broad range of potential applications due to its exceptional corrosion resistance, anti-icing, and self-cleaning qualities.

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具有防腐蚀自清洁性能的mof基超疏水复合涂层的制备

为了提高金属的耐腐蚀性，用MOF（ZIF-67）纳米颗粒和聚氨酯树脂制备了一种分层结构的超疏水涂层。采用十二烷基三甲氧基硅烷（DTMS）和月桂酸（LA）对ZIF-67纳米粒子进行改性，采用喷雾法制备了超疏水复合涂层。制备的ZIF-67/DTMS/LA/PU超疏水复合涂层具有优异的疏水性（WCA = 157.5°）、自洁性和耐腐蚀性，在3.5 wt% NaCl溶液中浸泡12天后仍保持超疏水性。值得注意的是，在3.5 wt% NaCl溶液中浸泡168 h后，ZIF-67/DTMS/PU涂层的阻抗模量仍然超过7075铝合金浸泡后的初始阻抗模量，表明ZIF-67/DTMS/PU涂层可以对铝合金提供长期保护。由于其优异的耐腐蚀性、防结冰和自清洁性能，该涂层具有广泛的潜在应用前景。

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.