Nanojunction-triggered self-healing coating via inspired “wing membrane-veins” strategy

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-06-03 DOI:10.1016/j.compositesa.2025.109093

Miaomiao Li , Dening Zou , Libo Tong , Xiangjun Li , Fangxia Ye , Kuaishe Wang

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引用次数: 0

Abstract

Improving the mobility of 2D fillers in organic coatings is crucial in addressing anticorrosion and self-healing efficiency trade-off, while most previously proposed strategies focusing on polymer interfacial modification restrict enhancement in self-healing. Here, inspired by dragonfly wings, a robust photothermal-triggered intelligent self-healing coating is fabricated, which possess forming a 3D adaptive interpenetrating network structure and possessing the excellent anti-corrosion property. Through bionic design strategy of the soft membranes in polyfluoroacrylate (PTHBU) and rigid veins in polypyrrole-based nanotubes functionalized graphite nitrogen carbide (CPI), has been successfully constructed on the reinforcing steel substrate. Photothermal conversion triggered by CPI heterojunctions can effectively promote polymer chain movement and molecular rearrangement through heat transfer from 3D skeletons, leading to the enhanced self-healing efficiency (92.9 %). Additionally, the designed PTHBU/CPI coating maintains the superior corrosion resistance (i_corr = 6.15 × 10^-11 A·cm^-2, and R_ct = 7.38 × 10⁹ ohm∙cm²) by coupling of the labyrinth effect of the nanoscale CN and the passivation-inhibition effect of the micro-scale PNT-IL. The bionic heterojunction enhancement strategy underscores the great potential as a feasible candidate material for advanced self-healing and long-term anticorrosion protection applied in harsh working conditions such as marine engineering and energy equipment.

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基于“翼膜-脉”策略的纳米结触发自愈涂层

提高有机涂层中二维填料的流动性对于解决防腐和自修复效率之间的权衡至关重要，而大多数先前提出的策略都集中在聚合物界面改性上，限制了自修复的增强。本文以蜻蜓翅膀为灵感，制备了一种坚固的光热触发智能自愈涂层，该涂层具有形成三维自适应互穿网络结构和优异的防腐性能。通过仿生设计策略，在增强钢基体上成功构建了聚氟丙烯酸酯（PTHBU）软膜和聚吡咯基纳米管功能化碳化石墨氮（CPI）刚性脉。CPI异质结引发的光热转换可以通过3D骨架的热传递有效促进聚合物链的移动和分子的重排，从而提高自愈效率（92.9%）。此外，设计的PTHBU/CPI涂层通过纳米级CN的迷宫效应和微级PNT-IL的钝化缓蚀效应耦合，保持了优异的耐蚀性（icorr = 6.15 × 10-11 A·cm-2, Rct = 7.38 × 109 ohm∙cm2）。仿生异质结增强策略强调了在海洋工程和能源设备等恶劣工作条件下，作为先进自修复和长期防腐保护的可行候选材料的巨大潜力。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.