自修复聚氨酯弹性体材料及其制备方法
By using a dynamic disulfide bond and ureidopyrimidinone quadruple hydrogen bond crosslinking network, the problem of low repair efficiency of existing self-healing polyurethane elastomers at room temperature is solved, achieving both high efficiency self-healing and mechanical properties at 25°C, making it suitable for automotive coatings and flexible electronic packaging.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHONGBEI UNIV
- Filing Date
- 2026-06-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing self-healing polyurethane elastomer materials cannot achieve efficient repair at room temperature, requiring external thermal triggering conditions above 60°C. Furthermore, in automotive coatings and flexible electronic packaging applications, it is difficult to balance repair efficiency and initial strength in terms of mechanical properties.
A reversible crosslinking network of dynamic disulfide bonds and ureidopyrimidinone quadruple hydrogen bonds was adopted. Through a novel diol chain extender containing disulfide bonds and isocyanurate hard segment units containing UPy suspension groups, combined with polytetrahydrofuran diol soft segments, a polyurethane elastomer material that spontaneously heals at 25°C was formed, and the second-order orientation factor of the hard segment microphase was controlled in the range of 0.60~0.85.
At 25°C, the fracture strength recovery rate reaches over 90%, the tensile strain recovery rate reaches over 88%, and the Shore A hardness can be adjusted within the range of 40~80, meeting the mechanical requirements of automotive coatings and flexible electronic packaging, and maintaining excellent performance under chemical media and fatigue conditions.
Smart Images
Figure CN122404660A_ABST