Scholarlink

<p>The surface microstructure of continuous aramid fibers (AFs) is significant for AF/unsaturated polyester (UP) resin composites. The chemical modification of the AF surface is the key point to enhance mechanical properties of AF/UP composites. In this study, the polyethyleneimine (PEI)-polydopamine (PDA) coating was formed on the continuous AF surface via a one-step process. Morphologies and functional groups of PEI-PDA-coated AFs were studied. It was revealed that the interfacial bonding strength between PEI-PDA-AFs and the UP matrix was increased by 82.47% due to formation of the chemical bonding between amino groups on PEI and hydroxyl groups on UP. The tensile strength of the PEI-PDA-AF/UP composite reached 959.07 MPa, increased by 34.19% compared with that before modification. This study presents a simple and efficient method to prepare high-strength continuous AF/UP composites which could be used in engineering fields of deep-sea pipeline, aerospace, construction, military, safety, sports equipment, etc.</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

Continuous aramid fiber/unsaturated polyester resin composites with excellent interfacial and mechanical properties

  • 期刊论文

  • 发表日期：

    2025年6月9日

查看全文
  • Yan Zhang,
  • Yinchun Hu,
  • Kexin Chen,
  • Zhibin Jin,
  • Qi Lei,
  • Yongcun Li,
  • Chuanbo Cong,
  • Qiong Zhou,
  • Yingying Wang

摘要

The surface microstructure of continuous aramid fibers (AFs) is significant for AF/unsaturated polyester (UP) resin composites. The chemical modification of the AF surface is the key point to enhance mechanical properties of AF/UP composites. In this study, the polyethyleneimine (PEI)-polydopamine (PDA) coating was formed on the continuous AF surface via a one-step process. Morphologies and functional groups of PEI-PDA-coated AFs were studied. It was revealed that the interfacial bonding strength between PEI-PDA-AFs and the UP matrix was increased by 82.47% due to formation of the chemical bonding between amino groups on PEI and hydroxyl groups on UP. The tensile strength of the PEI-PDA-AF/UP composite reached 959.07 MPa, increased by 34.19% compared with that before modification. This study presents a simple and efficient method to prepare high-strength continuous AF/UP composites which could be used in engineering fields of deep-sea pipeline, aerospace, construction, military, safety, sports equipment, etc.