组胺改性环氧树脂及其对有机涂层性能的影响
Histamine-modified Epoxy Resin and its Effect on Properties of Organic Coatings
曹京宜 1李敬 2殷文昌 1孟凡帝 2刘莉2
作者信息
- 1. 中国人民解放军92228部队 北京 100072
- 2. 东北大学沈阳材料科学国家研究中心腐蚀与防护研究部 沈阳 110016
- 折叠
摘要
针对深海极端环境下涂层/金属界面结合力差的问题,通过将组胺接枝于环氧树脂E44分子链制备了能与基体金属形成化学键的活性环氧树脂(ZA-EP).ZA-EP中组胺杂原子可通过与Fe/Fe的氧化物的空位轨道形成共用孤对电子,促使Fe2+与树脂形成复合物,从而提高了涂层与金属界面的结合强度.相比于普通环氧涂层,添加活性树脂的涂层附着力明显提高,如添加3％ZA-EP后涂层附着力由6.02 MPa提高至15.36 MPa.另外,模拟深海交变压力环境下的服役结果显示,3％ZA-EP/EP涂层的饱和吸水率最低,循环一周期后仅为1.6％;72 h后的EIS结果表明,3％ZA-EP/EP涂层阻抗值仍保持稳定.组胺改性使得环氧涂层/金属界面形成化学键合作用,增强了涂层的附着力,因此ZA-EP/EP涂层具有更加优异的防护能力.
Abstract
To solve the problem of poor adhesion of the coating/metal interface in deep-sea environ-ments,active epoxy resin(ZA-EP)was prepared by grafting histamine onto the epoxy resin E44 molecu-lar chain,which can facilitate the formation of chemical bonds with metal substrate.Histamine heteroat-oms in ZA-EP can form a shared lone pair electron with the vacant orbital of iron/iron oxide,which can promote the formation of the complex of Fe2+ions with the resin,thus improving the interfacial bonding strength between the coating and the metal substrate.Compared with the ordinary epoxy coating,the ad-hesion of the coating containing active resin was significantly improved:for example,the adhesion of ep-oxy coating increased from 6.02 MPa to 15.36 MPa after the addition of 3％ZA-EP.In addition,the test results in the simulated deep-sea water under alternating pressure show that the saturation water absorp-tion of the 3％ZA-EP/EP coating is the lowest,only 1.6％after one cycle test in 3.5％NaCl solution(by high static pressure 3.5 MPa for 12 h+constant pressure 0.1 MPa for 12 h).The EIS results after 3 cycle test(72 h)showed that the impedance of the 3％ZA-EP/EP coating remained stable.In other words,hista-mine modification may facilitate the formation of a chemical bond at the coating/metal interface,enhanc-es the adhesion of the coating,thereby,the ZA-EP/EP coating has a good protective performance.
关键词
组胺/环氧树脂改性/附着力Key words
histamine/epoxy resin modification/adhesion引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据