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An anti-corrosion coating with self-healing function of polyurethane modified by lipoic acid

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Abstract

Polyurethanes (PUs) are a polymer material with a wide range of applications and excellent mechanical properties. In this work, a modified polyurethane coating with the self-healing function is developed via the reaction between polytetrahydrofuran (PTMG), 2,4-toluene diisocyanate (TDI) and α-lipoic acid. The coatings are characterized by SEM and FTIR. The protection of the prepared coating for copper in 3 wt.% NaCl solution is investigated by the electrochemical measurements and the surface self-healing tests. The coating has stable protection from corrosion of the copper substrate in corrosive medium and shows a good self-healing ability. The healing behavior in morphology and corrosion resistance can be observed when heated above 60°C.

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Acknowledgments

Our work was supported by NSFC project (Grant Nos. 52071198, 52001194). We thank the grant from the Science & Technology Commission of Shanghai Municipality (18DZ2204400, 19DZ2271100) very much. The work was supported by Open Fund of Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai, 200090, China

    Zhentao Cai, Chunping Li, Daquan Zhang & Jin Li

  2. Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai, 200090, China

    Zhentao Cai, Chunping Li, Daquan Zhang, Jin Li & Lixin Gao

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  1. Zhentao Cai
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Correspondence to Daquan Zhang.

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Cai, Z., Li, C., Zhang, D. et al. An anti-corrosion coating with self-healing function of polyurethane modified by lipoic acid. J Coat Technol Res 20, 713–724 (2023). https://doi.org/10.1007/s11998-022-00703-0

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  • DOI: https://doi.org/10.1007/s11998-022-00703-0

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