【摘 要】
：
One-component,catalyst-free self-healing coatings with double-shelled polymer microcapsules have drawn considerable attention due to wide applications.In this w
【机 构】
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National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory
论文部分内容阅读
One-component,catalyst-free self-healing coatings with double-shelled polymer microcapsules have drawn considerable attention due to wide applications.In this work,the synthesis parameters of double-shelled polymer microcapsules and the mechanism of the self-healing process were systematically investigated.Apart from the chemical structure of the microcapsule shell,the shell thickness,the microcapsule size,and the core fraction could affect the self-healing anticorrosion properties.The synthesis parameters were further optimized in terms of the agitation rate,pH,weight ratio of core to shell,and temperature.Under these conditions,the microcapsule shell consisting of a rough surface formed by poly(urea-formaldehyde) and a smooth inner wall by polyurethane was prepared.The size of the microcapsules and core fraction were calculated to be approximately 30 μm and 75％,respectively.The self-healing anticorrosion coating incorporating as-synthesized microcapsules exhibited corrosion resistance in artificially scratched areas,which was further characterized by electrochemical impedance spectroscopy.
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