掺杂碳纳米管聚砜微胶囊自修复涂层耐蚀机理研究  

Corrosion resistance and mechanism of epoxy self-healingcoating doped with carbon nanotube polysulfone microcapsules

作　　者：陈宏 亢淑梅[1] 曹启栋 孙东鹏 鲁宸硕 李景灏 杨子涵 CHEN Hong;KANG Shumei;CAO Qidong;SUN Dongpeng;LU Chenshuo;LI Jinghao;YANG Zihan(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114000,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114000

出　　处：《功能材料》2025年第4期4180-4192,共13页Journal of Functional Materials

基　　金：辽宁省自然科学基金(2022-MS-355)。

摘　　要：为延缓金属腐蚀的速度,通过溶剂蒸发法制备聚砜树脂包覆亚麻籽油微胶囊。并成功地将碳纳米管嵌入到壁材聚砜树脂之中,从而研发出一种新型的PSF@LO@HMWCNTs复合微胶囊。并对微胶囊的化学结构、微观形貌和物性进行了表征和分析。在环氧树脂的涂层结构中,分别负载两种不同的微胶囊,构建出PSF@LO/EP、PSF@LO@HMWCNTs/EP复合涂层,并探究了碳纳米管的掺杂对自修复涂层的疏水性、耐蚀性及自修复性能的影响。结果表明,芯壁比为2∶1的PSF@LO微胶囊包封率最高,为11.76%;制备的PSF@LO微胶囊和PSF@LO@HMWCNTs微胶囊分散效果较好、形貌规则、成球性好;碳纳米管的掺杂提高了PSF@LO微胶囊热分解温度及疏水性,测得PSF@LO、PSF@LO@HMWCNTs微胶囊的热分解温度分别为140℃、170℃,水接触角分别为85°、124°。电化学实验表明,搭载10%PSF@LO微胶囊和5%PSF@LO@HMWCNTs微胶囊的环氧涂层耐蚀的阻抗模值分别达到了8.9×10^(4)和2.30×10^(6)Ω/cm^(2)。To slow down the rate of metal corrosion,polysulfone resin coated linseed oil microcapsules were prepared by solvent evaporation method.And carbon nanotubes were successfully embedded into the wall material polysulfone resin,thus developing a new type of PSF@LO@HMWCNTs composite microcapsules.The chemical structure,microstructure,and physical properties of the microcapsules were characterized and analyzed.Two types of microcapsules were respectively loaded into the epoxy resin coating structure to construct PSF@LO/EP and PSF@LO@HMWCNTs/EP composite coating,and the influence of carbon nanotube doping on the hydrophobicity,corrosion resistance,and self-healing performance of the self-healing coating were investigated.The results indicate that the core-to-wall ratio of 2:1 PSF@LO microcapsules have the highest encapsulation efficiency,at 11.76%.The prepared PSF@LO microcapsules and PSF@LO@HMWCNTs microcapsules have good dispersion effect,regular morphology and good sphericity.The doping of carbon nanotubes has improved PSF@LO thermal decomposition temperature and hydrophobicity of microcapsules.The thermal decomposition temperatures of PSF@LO and PSF@LO@HMWCNTs microcapsules are 140℃and 170℃respectively,and the water contact angles are 85°and 124°.Electrochemical experiments have shown that the impedance modulus values of the epoxy coating of loading 10%PSF@LO microcapsules and 5%PSF@LO@HMWCNTs microcapsules for corrosion resistance reach 8.9×10^(4)Ω/cm^(2)and 2.30×10^(6)Ω/cm^(2)respectively.

关 键 词：微胶囊 自修复涂层 聚砜树脂 羟基多壁碳纳米管 溶剂蒸发法 

分 类 号：TG174[金属学及工艺—金属表面处理]