Scholarlink

<p>Carbon fiber-reinforced polymer (CFRP) composites often exhibit poor interfacial adhesion in adhesively bonded joints due to their inherently smooth and chemically inert surfaces. Inspired by the adhesive micro textures of tree frog toe pads, this study introduces biomimetic hexagonal micro textures onto CFRP surfaces via femtosecond laser processing. The influence of key laser processing parameters—including pulse energy, scanning speed, and the number of scans—on the resulting morphology, surface wettability, and bonding performance is systematically examined. Wettability measurements reveal that these laser-induced micro textures significantly alter the surface wettability, reducing the contact angle from approximately 100° (untreated surface) to 0° (super-hydrophilic), or increasing it to 175° (super-hydrophobic). These modifications promote thorough adhesive infiltration and eliminate the formation of interfacial voids. Mechanical tests show that the maximum shear strength of the adhesively bonded joints reaches 27.01&#xa0;MPa, representing an 83.11% improvement compared to the untreated surface (14.75&#xa0;MPa). This study proposes a bioinspired approach that combines wettability regulation and mechanical reinforcement to enhance CFRP adhesive interfaces, and highlights the potential of laser-engineered micro textures for high-performance composite bonding application.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Femtosecond Laser Processing of Micro Textured CFRP Bonding Interfaces and their Adhesive Properties

  • 期刊论文

  • 发表日期：

    2025年11月27日

查看全文
  • Jingyi Li,
  • Aoyun Jin,
  • Ye Ding,
  • Neil G. R. Broderick,
  • Jeffery Low,
  • Lijun Yang,
  • Ming Zhou,
  • Maolu Wang,
  • Jianlei Cui

摘要

Carbon fiber-reinforced polymer (CFRP) composites often exhibit poor interfacial adhesion in adhesively bonded joints due to their inherently smooth and chemically inert surfaces. Inspired by the adhesive micro textures of tree frog toe pads, this study introduces biomimetic hexagonal micro textures onto CFRP surfaces via femtosecond laser processing. The influence of key laser processing parameters—including pulse energy, scanning speed, and the number of scans—on the resulting morphology, surface wettability, and bonding performance is systematically examined. Wettability measurements reveal that these laser-induced micro textures significantly alter the surface wettability, reducing the contact angle from approximately 100° (untreated surface) to 0° (super-hydrophilic), or increasing it to 175° (super-hydrophobic). These modifications promote thorough adhesive infiltration and eliminate the formation of interfacial voids. Mechanical tests show that the maximum shear strength of the adhesively bonded joints reaches 27.01 MPa, representing an 83.11% improvement compared to the untreated surface (14.75 MPa). This study proposes a bioinspired approach that combines wettability regulation and mechanical reinforcement to enhance CFRP adhesive interfaces, and highlights the potential of laser-engineered micro textures for high-performance composite bonding application.