聚苯并噁嗪基超疏水自修复防腐蚀涂层的构建及其作用机制

Metallic corrosion exerts huge impacts on safety in production, pollution in environment, waste in resources, and losses in economy. The design of novel anticorrosion coating systems and the development of superhydrophobic anticorrosion coatings with self-healing functionality are significant for prolonging the life-time of corrosion protection. It is not yet clear about the synergetic effect of superhydrophobic coating and inhibitor on the anticorrosive properties as well as the self-healing mechanism. Upon the excellent low surface free energy and anticorrosive performance of polybenzoxazine, we propose to develop polybenzoxazine-based superhydrophobic and self-healing anticorrosion coatings. The pH-responsive nanocontainers are designed to realize the controlled release of inhibitor. The effects of chemical composition and microstructure on the anti-corrosive properties of polybenzoxazine-based anticorrosion coatings will be studied. Based on these, the synergetic effect between physical barrier of superhydrophobic coating and active protection of inhibitor will be analyzed. The self-healing performance and mechanism of anticorrosion coatings will be also investigated. This project can provide theoretical and practical support for designing and preparing anticorrosion coatings with long life-time and durability. Therefore, this project has important scientific significance and potential application.

金属腐蚀威胁安全生产，造成环境污染和资源浪费，给国民经济带来巨大损失。设计新型防腐蚀涂料体系，发展具有自修复功能的超疏水防腐蚀涂层，对于实现长效防腐蚀具有重要意义。但超疏水涂层与缓蚀剂对于防腐蚀性能的协同作用规律以及涂层自修复作用机制目前尚不明确。基于聚苯并噁嗪材料兼具优良的低表面能特性和防腐蚀性能，本申请提出构建聚苯并噁嗪基超疏水自修复防腐蚀涂层，采用pH响应型纳米容器调控缓蚀剂的释放性能。研究聚苯并噁嗪基超疏水自修复防腐蚀涂层的组成及微观结构与其防腐蚀性能之间的构效关系，剖析超疏水涂层物理屏蔽作用与缓蚀剂主动防护作用的协同规律。考察涂层的自修复性能，探索其自修复作用机制。本项目将为长效防腐蚀涂层的设计制备提供理论和实践基础，具有重要的科学意义和潜在的应用价值。

金属腐蚀威胁安全生产，造成环境污染和资源浪费，给国民经济带来巨大损失。设计制备具有自修复功能的超疏水防腐蚀涂层对于实现长效防腐蚀具有重要意义。本项目制备了一系列聚苯并噁嗪防腐蚀涂层，研究了聚苯并噁嗪分子结构对其防腐蚀性能的影响规律，发现在聚苯并噁嗪结构中引入长链烃基，可以有效提高涂层的疏水性，有利于阻止腐蚀介质的渗透。基于聚苯并噁嗪兼具良好的疏水性和防腐蚀性能，通过引入不同种类的纳米粒子调控涂层的表面形貌，制备出一系列耐刮擦、耐高温的超疏水防腐蚀涂层。采用埃洛石纳米管负载缓蚀剂，制备出聚苯并噁嗪基自修复防腐蚀涂层，剖析了涂层自修复作用机制。提出自修复底漆与超疏水面漆的复合增效策略，构建了具有长效防腐蚀性能的聚苯并噁嗪基超疏水自修复防腐蚀涂层，阐明了涂层物理屏蔽效应和缓蚀剂主动防护的协同作用机制，为长效防腐蚀涂层的设计开发提供了理论依据和实践基础。