Robust icephobic epoxy coating using maleic anhydride as a crosslinking agent
Progress in Organic Coatings(2020)
摘要
To trains running in winter in cold regions, it is unavoidable that icing would occur on the train chassis surface. Such phenomenon negatively affects the train’s safety. The surface of the chassis generally was coated with epoxy (EP) resin for anti-corrosion; however, traditional EP coating is not icephobic and even not hydrophobic. In this work, robust hydrophobic and icephobic EP coatings were successfully prepared by using maleic anhydride (MAH) as a crosslinking agent, in addition to filling a small amount of EP resin grafted with fluorine containing chains (FEP). Furthermore, such hydrophobic and icephobic properties are not limited to the outermost surface of the coating but are also present in the coating body. After sanding with abrasive paper, the coating surface still retains its hydrophobic and icephobic properties. XPS indicates that MAH crosslinking greatly reduces the number of polar groups on the coating surface. The FEP mixture further reduces the free energy of the coating surface. As a result, the modified EP coating exhibits excellent icephobic performance. The ice formed on such surface may be removed away by its self-weight.
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关键词
Epoxy,Coating,Icephobic,Maleic anhydride,Fluorinated epoxy
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