Open AccessProperties and Corrosion Resistance Mechanism of a Self-Healing Propane–1,2,3-Triol-Loaded Polysulfone Microcapsule Coating Loaded with Epoxy Resin
Author(s) -
Qingping Zhao,
Shumei Kang,
Fangzheng Zou,
Zhongbo Zhu,
Jian Kang,
Yansheng Yin
Publication year - 2022
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.2c02026
Subject(s) - materials science , corrosion , coating , epoxy , polysulfone , composite material , propane , thermal stability , self healing , triol , chemical engineering , polymer chemistry , polymer , chemistry , organic chemistry , medicine , alternative medicine , diol , pathology , engineering
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.