Self‐Matting Waterborne Polyurethane Coatings With Ultra‐Low Gloss and Enhanced Corrosion Resistance via Molecular Design and ZnO Integration

IF 3.4 4区工程技术 Q2 POLYMER SCIENCE

Polymers for Advanced Technologies Pub Date : 2025-07-01 DOI:10.1002/pat.70268

Qi Jin, Xiaoyi Sun, Haikuan Chen, Qiuxia Luo, Mengting Mo, Cuiping Wen, Linfeng Huang, Zhenpin Lu, Ning Qing, Liuyan Tang

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引用次数: 2

Abstract

ABSTRACT Self‐matting waterborne polyurethanes (WPUs) are increasingly demanded in the automotive, architectural, and furniture industries for their ability to reduce visual fatigue and deliver refined aesthetics. However, their limited corrosion resistance restricts applications in harsh environments. This study addresses this challenge through a dual strategy: (1) molecular optimization to achieve ultra‐low gloss via self‐wrinkling morphology and (2) incorporation of zinc oxide (ZnO) nanoparticles to enhance corrosion resistance. By systematically adjusting the polytetrahydrofuran (PTMG) to polyethylene glycol (PEG) mass ratio (mPTMG: mPEG = 164.4:10), dimethylolpropionic acid (DMPA) content (1.8%), and NCO/OH ratio (2.1), a self‐matting WPU coating with a 60° gloss of 1.0 GU and an 85° gloss of 7.3 was developed. FTIR, SEM, and 3D profilometry confirmed microphase‐separated structures and surface roughness were critical for light scattering and highly affected the gloss of the WPU films. The WPU films also displayed excellent mechanical properties. Furthermore, introducing ZnO nanoparticles (0–5 wt%) significantly improved corrosion resistance, as evidenced by electrochemical impedance spectroscopy and salt immersion tests. Optimized ZnO‐composited WPU exhibited a ninefold increase in impedance modulus compared to pristine WPU, demonstrating effective barrier properties against corrosive agents. By bridging the gap between low‐VOC matting performance and corrosion resistance, this work expands the applicability of WPUs in industries requiring sustainable and high‐performance coatings for harsh environments.

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自消光水性聚氨酯涂料，通过分子设计和ZnO集成，具有超低光泽和增强的耐腐蚀性

自消光水性聚氨酯（wpu）在汽车、建筑和家具行业的需求越来越大，因为它们具有减少视觉疲劳和提供精致美学的能力。然而，它们有限的耐腐蚀性限制了在恶劣环境中的应用。本研究通过双重策略解决了这一挑战：(1)分子优化，通过自皱形态实现超低光泽度；(2)氧化锌纳米颗粒的掺入，以增强耐腐蚀性。通过系统调节聚四氢呋喃（PTMG）与聚乙二醇（PEG）的质量比（mPTMG: mPEG = 164.4:10）、二甲基丙酸（DMPA）含量（1.8%）和NCO/OH比（2.1），制备出60°光泽度为1.0 GU、85°光泽度为7.3的自消光WPU涂层。FTIR、SEM和3D轮廓术证实，微相分离结构和表面粗糙度对光散射至关重要，并高度影响WPU膜的光泽度。WPU薄膜还表现出优异的力学性能。此外，电化学阻抗谱和盐浸测试结果表明，引入ZnO纳米颗粒（0-5 wt%）显著提高了耐腐蚀性。与原始WPU相比，优化后的ZnO复合WPU的阻抗模量增加了9倍，显示出对腐蚀剂的有效阻隔性能。通过弥合低VOC消光性能和耐腐蚀性之间的差距，这项工作扩大了wpu在恶劣环境下需要可持续和高性能涂料的行业中的适用性。

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

Polymers for Advanced Technologies 工程技术-高分子科学

CiteScore

6.20

自引率

5.90%

发文量

337

审稿时长

2.1 months

期刊介绍： Polymers for Advanced Technologies is published in response to recent significant changes in the patterns of materials research and development. Worldwide attention has been focused on the critical importance of materials in the creation of new devices and systems. It is now recognized that materials are often the limiting factor in bringing a new technical concept to fruition and that polymers are often the materials of choice in these demanding applications. A significant portion of the polymer research ongoing in the world is directly or indirectly related to the solution of complex, interdisciplinary problems whose successful resolution is necessary for achievement of broad system objectives. Polymers for Advanced Technologies is focused to the interest of scientists and engineers from academia and industry who are participating in these new areas of polymer research and development. It is the intent of this journal to impact the polymer related advanced technologies to meet the challenge of the twenty-first century. Polymers for Advanced Technologies aims at encouraging innovation, invention, imagination and creativity by providing a broad interdisciplinary platform for the presentation of new research and development concepts, theories and results which reflect the changing image and pace of modern polymer science and technology. Polymers for Advanced Technologies aims at becoming the central organ of the new multi-disciplinary polymer oriented materials science of the highest scientific standards. It will publish original research papers on finished studies; communications limited to five typewritten pages plus three illustrations, containing experimental details; review articles of up to 40 pages; letters to the editor and book reviews. Review articles will normally be published by invitation. The Editor-in-Chief welcomes suggestions for reviews.

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