Robust superhydrophobic polyurea composite coating with octadecyltrimethoxysilane -modified halloysite nanotubes: Hierarchical design for mechanical and chemical durability in harsh environments

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-07-26 DOI:10.1016/j.porgcoat.2025.109539

Pengwei Ran , Banghao Wang , Fuping Dong , Yuzhu Xiong , Chang-Sik Ha

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引用次数: 0

Abstract

A superhydrophobic composite coating with exceptional durability was fabricated by integrating octadecyltrimethoxysilane (ODTMS)-modified halloysite nanotubes (HNTs) into a polyurea (PU) matrix. The hierarchical micro-nano structure, constructed through hydrogen bonding networks between PU and HNTs, synergized with the low surface energy of ODTMS to achieve a water contact angle of 157°. Fourier-transform infrared spectroscopy, X-ray powder diffractometer and X-ray photoelectron spectroscopy analyses confirmed successful ODTMS grafting and homogeneous dispersion of HNTs within the PU matrix. Remarkably, the coating retained superhydrophobicity (contact angle >150°) after 50 tape-peeling cycles and 130 cm sandpaper abrasion, attributed to the dual reinforcement mechanism of PU's elasticity and HNTs' mechanical robustness. Furthermore, the coating exhibited pH stability (pH 2–12 for 20 h) and thermal resistance up to 250 °C. This work provides a scalable strategy for designing durable superhydrophobic coatings, demonstrating potential applications in construction, ships, and electronic devices under extreme conditions.

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十八烷基三甲氧基硅烷改性高岭土纳米管坚固的超疏水性聚脲复合涂层：在恶劣环境中机械和化学耐久性的分层设计

将十八烷基三甲氧基硅烷（ODTMS）修饰的高岭土纳米管（HNTs）集成到聚脲（PU）基体中，制备了具有优异耐久性的超疏水复合涂层。通过PU和HNTs之间的氢键网络构建的分层微纳结构，与ODTMS的低表面能协同作用，实现了157°的水接触角。傅里叶变换红外光谱，x射线粉末衍射仪和x射线光电子能谱分析证实了ODTMS接枝成功和HNTs在PU基体内均匀分散。值得注意的是，经过50次胶带剥离和130 cm砂纸磨损后，涂层仍保持超疏水性（接触角>；150°），这是由于PU的弹性和HNTs的机械坚固性的双重增强机制。此外，涂层表现出pH稳定性（pH 2-12持续20 h）和高达250°C的耐热性。这项工作为设计耐用的超疏水涂层提供了一种可扩展的策略，展示了在极端条件下建筑、船舶和电子设备中的潜在应用。

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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.