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<p>In this study, we explored a strategy to improve the adhesion of the silver (Ag) film to the PET substrate and enhance the overall mechanical flexibility of the film by modifying the polyethylene terephthalate (PET) surface with ethylenediamine (EDA) and depositing a Ag film on it by magnetron sputtering. To address the issue of poor adhesion under deformation, this study modified the PET substrate with EDA to introduce amino functional groups to increase the metal affinity and chemical activity of the surface. Subsequently, an Ag film was deposited on the modified PET surface by magnetron sputtering to form a PET-Ag composite film. The changes in the surface chemical properties were characterized by Contact angle measurement (CA) and Fourier transform infrared spectroscopy (FTIR), which verified the effectiveness of EDA modification. The deposition thickness and morphology of the Ag film were analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). In addition, the continuous bending test showed that the PET-Ag composite film exhibited excellent flexibility and bending resistance (up to 15,000 cycles) while maintaining good conductivity. This EDA-assisted strategy provides a low-cost and scalable alternative to plasma or UV-based methods. This study provides an effective solution for the preparation of high-adhesion and flexible PET-Ag composite films, which have broad prospects in applications such as flexible electronic devices and antibacterial coating.</p>

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Enhanced adhesion and flexibility of PET-Ag composite films via ethylenediamine surface modification for flexible electronics

  • 期刊论文

  • 发表日期：

    2025年8月3日

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  • Yan Chen,
  • Ping Wu,
  • Pei Qin

摘要

In this study, we explored a strategy to improve the adhesion of the silver (Ag) film to the PET substrate and enhance the overall mechanical flexibility of the film by modifying the polyethylene terephthalate (PET) surface with ethylenediamine (EDA) and depositing a Ag film on it by magnetron sputtering. To address the issue of poor adhesion under deformation, this study modified the PET substrate with EDA to introduce amino functional groups to increase the metal affinity and chemical activity of the surface. Subsequently, an Ag film was deposited on the modified PET surface by magnetron sputtering to form a PET-Ag composite film. The changes in the surface chemical properties were characterized by Contact angle measurement (CA) and Fourier transform infrared spectroscopy (FTIR), which verified the effectiveness of EDA modification. The deposition thickness and morphology of the Ag film were analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). In addition, the continuous bending test showed that the PET-Ag composite film exhibited excellent flexibility and bending resistance (up to 15,000 cycles) while maintaining good conductivity. This EDA-assisted strategy provides a low-cost and scalable alternative to plasma or UV-based methods. This study provides an effective solution for the preparation of high-adhesion and flexible PET-Ag composite films, which have broad prospects in applications such as flexible electronic devices and antibacterial coating.