加拿大阿尔伯塔大学曾宏波教授等：贻贝角质层颗粒启发金属有机框架衍生纳米复合涂层用于智能腐蚀控制

2025-10-28 14:44:58 作者：本网发布来源：中国科学材料分享至：

将金属基材和水性介质物理隔绝的超疏水涂层成为一种有前景金属防腐蚀策略，但其实际应用受限于在严苛环境中的机械耐久性差和性能快速退化。

近日，加拿大阿尔伯塔大学曾宏波教授、中南林业科技大学李新功教授、湖南大学刘娅莉教授和黔南民族师范学院罗小虎副教授等人在Science China Materials发表研究论文，受贻贝角质层颗粒结构和动态金属配位化学的启发，使用金属有机框架（MOF）作为多功能纳米平台，在钢基材上构建了一种集表面超疏水性、自修复防腐和损伤监测能力于一体的分级金属配位介导自适应涂层（SC）。

本文要点

1) 在低碳钢表面通过配位-溶解-聚合机制构建了金属有机框架-聚多巴胺（MOFs-PDA）纳米复合涂层，MOFs作为自牺牲模板引发聚多巴胺的沉积，随后通过迈克尔加成和希夫碱反应进行疏水化后获得SC。

2) SC的超疏水表面具有160°的水接触角，提供了优异的腐蚀介质被动屏障，保护效率达到97.5%。此外，MOF-聚多巴胺中间层通过在暴露的钢表面形成保护性吸附膜，赋予SC优异的腐蚀触发自修复性能，从而防止SC因机械损伤而快速失效。

3) 在此基础上，聚多巴胺组分的光热性能使破损涂层在光照下快速产生温度梯度，从而可以通过红外热成像进行早期损伤检测。

这项工作提出了一种仿生策略用于开发兼具超疏水性、自修复和实时损伤感知的智能防腐蚀涂层，推进了MOF衍生材料在防护涂层中的应用。

Figure 1. Schematic illustrations of (a) fabrication route; (b) protective mechanism of the self-adaptive coating: (I) when the air cushion on the surface of the self-adaptive coating is intact, the surface superhydrophobicity avoids the permeation of corrosive media; (II) the self-adaptive coating loses its superhydrophobicity, and the MOF-PDA interlayer serves as a temporary barrier layer to restrict permeation of corrosive media; (III) the defected self-adaptive coating responds to the corrosion-triggered local pH changes and protects the exposed steel by forming a new protective film; (IV) the adsorption of cobalt hydroxides, 2-methylimidazole (2-MeIM), and PDA molecules on mild steel; (c) the damage detection using an infrared thermal imager.

Figure 2. SEM images of (a) α-Co(OH)₂, (b) Co-ZIF-67-1 min, (c) Co-ZIF-67-3 min, (d) Co-ZIF-67-5 min, (e) Co-ZIF-67-10 min, (f) Co-ZIF-67-15 min, (g) Co-ZIF-67-12 h, (h) Co-ZIF-67@PDA, and (i) SC; (j) optical photo of the coatings.

Figure 3. Optical pictures of water contact angles and structural illustration for (a₁, b₁) Co-ZIF-67-5 min, (a₂, b₂) Co-ZIF-67@PDA, and (a₃, b₃) SC; (c) comparison on average values of water contact angle on the surface of the prepared samples; (d) self-cleaning property (colorant: Ni(NO₃)₂) and silver mirror phenomenon of SC; sequential photographs of (e) the water droplet in contact with and then leave from the SC surface and (f) the water droplet contacting with a moving steel plate coated with SC (the arrow indicates the direction of movement).

Figure 4. Bode modulus and phase plots of the scratched (a₁, a₂) Co-ZIF-67-5 min, (b₁, b₂) Co-ZIF-67@PDA, and (c₁, c₂) SC after immersion in 3.5 wt% NaCl for different periods; evolution process of the low frequency impedance for the scratched (a₃) Co-ZIF-67-5 min, (b₃) Co-ZIF-67@PDA, and (c₃) SC; (d) comparison on self-healing properties of SC with previously reported coatings (the ambient temperature denoted as 25 °C); (e) schematic illustration of self-healing anticorrosion mechanism for SC.

【作者简介】

Chengliang Zhou (周城良) received his Bachelor’s degree in applied chemistry from Hunan Agricultural University. He received a PhD degree in chemical engineering and technology from Hunan University. His research focuses on bioinspired design and fabrication of self-healing nanocomposites and biobased polymer materials, with applications in functional coatings and smart corrosion control.

Xiaohu Luo (罗小虎) is currently an associate professor at the School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, and is the director of the Engineering Research Center of Lose Efficacy and Anticorrosion of Materials of Guizhou. His research focuses on green and highly efficient corrosion inhibitors and multifunctional coatings.

Yali Liu (刘娅莉) is a professor at the College of Chemistry and Chemical Engineering, Hunan University. She is the deputy director of the Technical Committee on Coating and Surface Protection Technology, Chinese Society for Corrosion and Protection. Her research focuses on metal corrosion and protection, functional and smart coatings, surface treatment, and biobased polymer materials.

Xingong Li (李新功) is currently a professor at the College of Materials and Energy, Central South University of Forestry and Technology. He has received the honorary title of “Young and Middle-aged Experts with Outstanding Contributions” and has been selected in the National Millions of Talents Project in the New Century and the Hunan Provincial “121” Talent Project. His research focuses on interfacial design and fabrication of green and multifunctional composite materials.

Hongbo Zeng (曾宏波) is a professor at the Department of Chemical and Materials Engineering, the University of Alberta and a Tier 1 Canada Research Chair in intermolecular forces and interfacial science, and he is recognized as a Fellow of the Royal Society of Canada’s Academy of Science, the Canadian Academy of Engineering, and the Royal Society of Chemistry. He received his BSc and MSc degrees at Tsinghua University, followed by a PhD degree at the University of California, Santa Barbara. Zeng’s research interests are mainly in colloid and interface science, functional materials & nanotechnology, with a specific focus on the intermolecular and surface interactions in soft materials (e.g., polymers, biopolymers) and engineering processes.

文章信息

Chengliang Zhou, Yongxiang Sun, Pan Huang, Xingong Li, Hongjian Zhang, Mingfei Pan, Xiaohu Luo, Lu Gong, Yali Liu, Hongbo Zeng. Mussel cuticle granule-inspired nanocomposite coating derived from metal-organic frameworks for intelligent corrosion control. Sci. China Mater. (2025).

https://doi.org/10.1007/s40843-025-3572-6

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