Robust superhydrophobic bilayer coating: Long-term anti-corrosion and anti-fouling resistance enabled by POSS star cross-linking and fluoride-modified SiO2 nanoparticles specific synergies

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-11-17 DOI:10.1016/j.porgcoat.2024.108919

Lijian Liu , Haihua Wang , Xixi Hao , Qinghua Zhang , Guiqiang Fei , Yihao Duan , Liyu Sun

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Abstract

Durable superhydrophobic coating has become frequently investigated and reported, however, achieving concurrent mechanical robustness, long-term anti-corrosive and anti-fouling functionalities remains a formidable challenge. In this study, a polymer nanocomposite coating was created through the star crosslinking of polyhedral oligomeric silsesquioxane (POSS) and fluorinated polyimide (FPI) prepolymer. Subsequently, a superhydrophobic bilayer was created by using the aforementioned coating as base coating, hydrophobic polyolefin (POA) with high toughness and strong adhesive was selected to binder fluoride-modified SiO₂ nanoparticles (F-SiO₂) to construct robust superhydrophobic topcoat and simultaneously enhance the interfacial bonding between topcoat and base coating. Notably, the bilayer superhydrophobic coating exhibited robust mechanical durability, retaining its superhydrophobicity even after 100 cycles of sandpaper friction and 80 cycles of tape peeling. After a 50-day salt spray test, the superhydrophobic FPI/POSS@POA/F-SiO₂ bilayer coating demonstrated exemplary corrosion resistance, the low frequency impedance modulus (|Z|_0.01Hz) was still as high as 7.04 × 10¹⁰ Ω·cm², which is one order of magnitude higher than that of FPI/POSS-4 coating (3.17 × 10⁹ Ω·cm²) and three orders of magnitude higher than pure FPI coating (1.82 × 10⁷ Ω·cm²). In addition, the superhydrophobic coating also demonstrated self-cleaning and anti-fouling properties. The enhanced comprehensive performance for the superhydrophobic FPI/POSS@POA/F-SiO₂ bilayer coating can be ascribed to the improved compactness and physical barrier resulted from the POSS star crosslinking, as well as the strong inhibitory effect endowed by the robust superhydrophobic surface. This study offers a fresh perspective on the preparation of superhydrophobic bilayer coatings with outstanding long-term anti-corrosive and anti-fouling attributes, showcasing their potential and prospective practical applications.

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坚固的超疏水双层涂层：通过 POSS 星形交联和氟化改性 SiO2 纳米粒子的特定协同作用实现长期防腐防污性能

耐用的超疏水涂层已成为研究和报道的热点，然而，要同时实现机械坚固性、长期防腐和防污功能仍是一项艰巨的挑战。在这项研究中，通过星形交联聚低聚硅氧烷（POSS）和氟化聚酰亚胺（FPI）预聚物，制备了一种聚合物纳米复合涂层。然后，以上述涂层为基底涂层，选择韧性高、粘合力强的疏水性聚烯烃（POA）作为氟化物改性二氧化硅纳米颗粒（F-SiO2）的粘合剂，形成超疏水双层涂层，以构建坚固的超疏水面涂层，同时增强面涂层与基底涂层之间的界面粘合力。值得注意的是，双层超疏水涂层表现出很强的机械耐久性，即使在砂纸摩擦 100 次和胶带剥离 80 次后仍能保持其超疏水性。经过 50 天的盐雾测试后，超疏水 FPI/POSS@POA/F-SiO2 双层涂层表现出卓越的耐腐蚀性，低频阻抗模量（|Z|0.01Hz）仍高达 7.04 × 1010 Ω-cm2，比 FPI/POSS-4 涂层（3.17 × 109 Ω-cm2）高出一个数量级，比纯 FPI 涂层（1.82 × 107 Ω-cm2）高出三个数量级。此外，超疏水涂层还具有自清洁和防污特性。FPI/POSS@POA/F-SiO2双层超疏水性涂层综合性能的提高可归因于POSS星型交联带来的致密性和物理屏障的改善，以及坚固的超疏水性表面所赋予的强大抑制作用。该研究为制备具有出色的长期防腐和防污特性的超疏水双层涂层提供了一个全新的视角，展示了其潜在的实际应用前景。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.