PDA and CeO2 synergistically functionalized montmorillonite nanosheets for reinforcing photothermal healing, antibacterial and anticorrosive coatings

IF 11 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-07-31 DOI:10.1007/s12598-025-03523-4

Zhi-Qiang Fang, Guo-Qing Wang, Zheng Li, Lei Huang, Yang-Kai Xiong, Hao Jiang, Si-Qi Liu, Wen-Wen Li, Ji-Peng Li, Ping Zhang

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引用次数: 0

Abstract

The introduction of fillers boosts the performance of polymer coatings and extends their service life. However, single component fillers are not sufficient for intelligent coatings, and compatibility between the polymer matrix and the filler remains a major challenge. In this study, functional polydopamine (PDA) modified CeO₂/sodium-based montmorillonite (Na-MMT) or CeO₂/calcium-based montmorillonite (Ca-MMT) fillers were designed and fabricated via facile in-situ method. The coatings incorporated with MMT-based fillers that were prepared demonstrated remarkable anti-corrosion capabilities, exceptional antimicrobial resistance, and rapid self-healing properties. Specifically, the low-frequency impedance (|Z|_0.01 Hz) values of PDA/CeO₂/Na-MMT/EP and PDA/CeO₂/Ca-MMT/EP, after being immersed for 30 days, were sustained at 2.24 × 10⁷ and 1.70 × 10⁷ Ω cm², respectively. Additionally, the bacteriostatic rates of the filler against E. coli and S. aureus can both reach above 99.9%, respectively, due to the photothermal effect and synergistic bacteriostatic mechanism of PDA and CeO₂. The scratches healed rapidly within 40 s under near-infrared (NIR) irradiation. This work provides valuable guidance for the utilization of MMT-based sheet fillers for enhanced corrosion-resistant, antimicrobial, and repairable coatings.

Graphical abstract

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PDA和CeO2协同功能化蒙脱土纳米片用于增强光热愈合、抗菌和防腐涂层

填料的引入提高了聚合物涂料的性能，延长了其使用寿命。然而，单组分填料不足以实现智能涂层，聚合物基体与填料之间的相容性仍然是一个主要挑战。本研究采用原位法设计并制备了功能性聚多巴胺（PDA）修饰的CeO2/钠基蒙脱土（Na-MMT）或CeO2/钙基蒙脱土（Ca-MMT）填料。加入mmt填料的涂层表现出卓越的抗腐蚀能力、卓越的抗微生物能力和快速自愈性能。其中，PDA/CeO2/Na-MMT/EP和PDA/CeO2/Ca-MMT/EP浸泡30天后的低频阻抗（|Z|0.01 Hz）值分别维持在2.24 × 107和1.70 × 107 Ω cm2。此外，由于PDA和CeO2的光热效应和协同抑菌机制，填料对大肠杆菌和金黄色葡萄球菌的抑菌率均可达到99.9%以上。在近红外（NIR）照射下，划痕在40 s内迅速愈合。这项工作为mmt基片状填料在增强耐腐蚀、抗微生物和可修复涂层中的应用提供了有价值的指导。图形抽象

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.