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Polydopamine/Silane Composite Coating on Electrolytic Copper Foil as Epoxy Adhesion Promoter and Corrosion Inhibitor

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Abstract

In order to enhance the electrolytic copper foil-epoxy adhesion in copper clad laminates, surface modification of the copper foil with a proper coupling agent is essential. However, single polydopamine (PDA) or silane coating on the copper foil is usually not satisfied. Herein, a composite coating on the copper foil is proposed by combining the universal adhesion promoter of PDA and the electrodeposited silane layer. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy confirmed the formation of the composite coating. The composite coating was uniformly distributed on the copper substrate as revealed by nano-infrared spectrometry and scanning electron microscopy observations. Compared with the pristine copper foil, the copper foil modified by the composite coating exhibited increased peel strength to the epoxy substrate by about 42.15% and improved corrosion resistance in both saline water and high-temperature (200°C) environments, which is attributed to its uniformity and the interface compatibility of the composite coating.

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Data Availability

The data presented in this study are available on request from the corresponding author.

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Acknowledgments

This research was financially supported by Zhejiang Huayuan New Energy Co., Ltd.

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Authors and Affiliations

  1. School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, 310027, China

    Mengjun Zhu, Mingtao Gan, Jiangping Tu, Xiuli Wang & Changdong Gu

  2. Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Hangzhou, 310027, China

    Mengjun Zhu, Mingtao Gan, Jiangping Tu, Xiuli Wang & Changdong Gu

  3. Zhejiang Huayuan New Energy Co., Ltd., Dongyang, 322100, China

    Jianfeng Pan

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  1. Mengjun Zhu
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Contributions

MZ Investigation, Methodology, Writing—original draft, Writing—review and editing. MG Data curation. JP Resources. JT Resources. XW Resources. CG Conceptualization, Resources, Writing—review and editing. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Changdong Gu.

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Zhu, M., Gan, M., Pan, J. et al. Polydopamine/Silane Composite Coating on Electrolytic Copper Foil as Epoxy Adhesion Promoter and Corrosion Inhibitor. J. Electron. Mater. 52, 8160–8174 (2023). https://doi.org/10.1007/s11664-023-10752-9

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  • DOI: https://doi.org/10.1007/s11664-023-10752-9

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