Zhao Qingping, Kang Shumei, Zou Fangzheng, Zhu Zhongbo, Kang Jian, Yin Yansheng
University of Science and Technology Liaoning, Anshan 114051, Liaoning, China.
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China.
ACS Omega. 2022 Jun 13;7(25):21868-21876. doi: 10.1021/acsomega.2c02026. eCollection 2022 Jun 28.
Propane-1,2,3-triol-loaded polysulfone (PSF) microcapsules were prepared by the solvent evaporation method. The particle size of the microcapsules is about 140 μm. The shell wall thickness is about 17 μm approximately. The microcapsules have high thermal stability and antiwear performance. The self-healing coating was prepared by adding the prepared capsule into the epoxy resin coating. After electrochemical and corrosion immersion experiments, the resistance modulus of the coating added to the microcapsules was higher than the others in a 3.5 wt % NaCl corrosion solution, and it had the lowest corrosion current density, so the self-healing microcapsule coatings showed excellent healing ability and corrosion inhibition function for microcracks. This was attributed to the formation of a hydrophobic film after propane-1,2,3-triol was released from the damaged microcapsules.
采用溶剂蒸发法制备了负载丙三醇的聚砜（PSF）微胶囊。微胶囊的粒径约为140μm，壳壁厚度约为17μm。该微胶囊具有高的热稳定性和抗磨性能。通过将制备好的胶囊加入到环氧树脂涂层中制备了自修复涂层。经过电化学和腐蚀浸泡实验，在3.5 wt% NaCl腐蚀溶液中，添加微胶囊的涂层的电阻模量高于其他涂层，且其腐蚀电流密度最低，因此自修复微胶囊涂层对微裂纹表现出优异的修复能力和缓蚀功能。这归因于丙三醇从受损微胶囊中释放后形成了疏水膜。
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