BTA@HMCs/PANI微胶囊的制备及环氧涂层防腐性能
Preparation of BTA@HMCs/PANI Microcapsules and Corrosion Resistance of Epoxy Coatings
张琲瑶 1李鑫 1石楠奇 1周锐 1金佳赢 1李海燕1
作者信息
- 1. 东北石油大学化学化工学院黑龙江省聚烯烃新材料重点实验室,黑龙江大庆 163318
- 折叠
摘要
以硬模板法合成的中空介孔碳球(HMCs)为微容器,通过真空浸渍及原位聚合法成功制得负载缓蚀剂苯并三氮唑(BTA)的BTA@HMCs/PANI微胶囊.制备的微胶囊呈规则球形,平均粒径约为270 nm,壁厚(50±10)nm,微胶囊芯材质量分数为31.0%.添加质量分数5%BTA@HMCs/PANI微胶囊的自修复环氧涂层具有最佳的防腐性能,盐水浸泡实验表明环氧复合涂层浸泡30d后无明显腐蚀现象,电化学阻抗实验表明,环氧复合涂层低频区的阻抗模量值较纯环氧涂层高2～3个数量级.文中同时揭示了微胶囊芯材腐蚀抑制剂BTA和微胶囊壁材聚苯胺(PANI)协同防腐机理.
Abstract
Hollow mesoporous carbon spheres(HMCs)synthesized by hard template method was used as microcontainers.BTA@HMCs/PANI microcapsules loaded with corrosion inhibitor benzotriazole(BTA)were successfully prepared by vacuum impregnation and in-situ polymerization.The prepared microcapsules were spherical with an average particle size of about 270 nm,a wall thickness of(50±10)nm,and a core content of 31.0%.The self-healing epoxy coating with 5% BTA@HMCs/PANI microcapsules has the best corrosion resistance.The salt water immersion experiment shows that the epoxy composite coating has no obvious corrosion phenomenon after 30 d of immersion,and the EIS electrochemical impedance experiment shows that the impedance modulus of the epoxy composite coating in the low frequency region is 2～3 orders of magnitude higher than that of the pure epoxy coating.At the same time,the synergistic anti-corrosion mechanism of microcapsule core material corrosion inhibitor BTA and microcapsule wall material PANI was revealed.
关键词
中空介孔碳球/微胶囊/自修复涂层/防腐性能Key words
hollow mesoporous carbon spheres/microcapsules/self-healing coating/corrosion resistance引用本文复制引用
基金项目
黑龙江省自然科学基金(LH2023E013)
出版年
2024
NETL
NSTL
万方数据