Scholarlink

<p>High-performance adhesives integrating high mechanical toughness, excellent environmental durability, and self-healing capability exhibit broad application potential. Herein, leveraging the excellent stress dissipation capability of multiple dynamic bonds, a self-healing fluorine-containing polyurethane (PU) adhesive with significantly enhanced toughness was designed by incorporating dynamic aromatic disulfide bonds and metal-coordination interactions. The incorporation of disulfide bonds endows the PU adhesive (named as SN-PU) with efficient lowtemperature self-healing performance, while the fluorine-containing side chains confer enhanced resistance to harsh environments. The SN-PU adhesive exhibited a tensile strength of 1.39 MPa, an elongation at break of 1300%, and a self-healing efficiency of 99.3% at 50 °C for 4 h, along with excellent recyclability via solvent-assisted casting molding. More importantly, further introduction of interchain Zr{su4+} coordination bonds into the SN-PU adhesive (named as Zr-PU) yields a maximum tensile strength of 24.92 MPa, approximately an 18-fold enhancement compared to the SN-PU adhesive. Meanwhile, the lap shear strengths of the SN-PU adhesive on various substrates, including steel plates, aluminum plates, epoxy-based composite plates, and polyamide, were significantly enhanced from 3.45, 2.65, 3.72, and 1.26 MPa to 5.60, 5.66, 4.03, and 3.51 MPa, respectively, for the Zr-PU system. This strategy of tailoring molecular chain structures and intermolecular interactions to enhance the strength, toughness, and reusability of adhesives offers a facile approach for the development of high-performance adhesive materials.</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

Molecular Engineering of Fluorine-containing Polyurethane Adhesives: Toughness and Self-healing Enhancement via Synergistic Disulfide-Zr4+ Coordination Bonds

  • 期刊论文

  • 发表日期：

    2026年4月30日

查看全文
  • Hao-Kai Yuan,
  • Qian-Qian Hou,
  • Peng Wang,
  • Yao Xu,
  • Lin Zhang,
  • Ying Li,
  • Jie Zhang,
  • Lu Wang,
  • Bing Geng,
  • Chuan-Yong Zong

摘要

High-performance adhesives integrating high mechanical toughness, excellent environmental durability, and self-healing capability exhibit broad application potential. Herein, leveraging the excellent stress dissipation capability of multiple dynamic bonds, a self-healing fluorine-containing polyurethane (PU) adhesive with significantly enhanced toughness was designed by incorporating dynamic aromatic disulfide bonds and metal-coordination interactions. The incorporation of disulfide bonds endows the PU adhesive (named as SN-PU) with efficient lowtemperature self-healing performance, while the fluorine-containing side chains confer enhanced resistance to harsh environments. The SN-PU adhesive exhibited a tensile strength of 1.39 MPa, an elongation at break of 1300%, and a self-healing efficiency of 99.3% at 50 °C for 4 h, along with excellent recyclability via solvent-assisted casting molding. More importantly, further introduction of interchain Zr{su4+} coordination bonds into the SN-PU adhesive (named as Zr-PU) yields a maximum tensile strength of 24.92 MPa, approximately an 18-fold enhancement compared to the SN-PU adhesive. Meanwhile, the lap shear strengths of the SN-PU adhesive on various substrates, including steel plates, aluminum plates, epoxy-based composite plates, and polyamide, were significantly enhanced from 3.45, 2.65, 3.72, and 1.26 MPa to 5.60, 5.66, 4.03, and 3.51 MPa, respectively, for the Zr-PU system. This strategy of tailoring molecular chain structures and intermolecular interactions to enhance the strength, toughness, and reusability of adhesives offers a facile approach for the development of high-performance adhesive materials.