Study on the performance of self-healing superhydrophobic coating on micro-arc oxidized surface with PDMS/PCL@F-SiO2

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.2024.131498

Xiao Han , Ziqi You , Jiansong Li , Ruina Ma , Yongzhe Fan , An Du , Xue Zhao , Mingxu Yang

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Abstract

A PDMS/PCL@F-SiO₂ superhydrophobic coating (M_PPF) with self-healing capabilities was developed by applying a thermo-responsive self-healing composite resin layer on the micro-arc oxidized surface of 7075 aluminum alloy. When the ratio of PDMS to PCL is set at 3:7, the composite resin layer achieves complete self-repair. Following the application of F-SiO₂ hydrophobic particles on the surface of the composite resin coating, a superhydrophobic coating (M_PPF) is obtained. The M_PPF exhibits a contact angle of 164.72° and a slide angle of 2.2°. Its corrosion potential is measured at −0.448 V,while the corrosion current density is recorded at 4.176 × 10⁻¹⁰ A·cm⁻², which is five orders of magnitude lower than that of 7075 aluminum alloy matrix. The M_PPF demonstrates excellent mechanical and chemical stability along with self-healing capabilities. Under thermal stimulation, the M_PPF can rapidly repair surface scratches, restoring both the superhydrophobic properties and, to some extent, the corrosion resistance of the sample.

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PDMS/PCL@F-SiO2 微弧氧化表面自修复超疏水涂层性能研究

通过在 7075 铝合金的微弧氧化表面涂敷热响应自修复复合树脂层，开发了一种具有自修复功能的 PDMS/PCL@F-SiO2 超疏水涂层（MPPF）。当 PDMS 与 PCL 的比例设定为 3:7 时，复合树脂层可实现完全自修复。在复合树脂涂层表面涂上 F-SiO2 疏水粒子后，就得到了超疏水涂层（MPPF）。MPPF 的接触角为 164.72°，滑动角为 2.2°。测得其腐蚀电位为 -0.448 V，腐蚀电流密度为 4.176 × 10-10 A-cm-2，比 7075 铝合金基体的腐蚀电流密度低五个数量级。MPPF 具有出色的机械和化学稳定性以及自愈能力。在热刺激下，MPPF 可以快速修复表面划痕，恢复超疏水特性，并在一定程度上恢复样品的耐腐蚀性。

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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.