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<p>Polyurethane possesses excellent characteristics of high elasticity and high strength, making them very important for many applications, but developing high-performance polyurethanes with new properties to meet the needs of different fields remains a challenge. In this work, we developed a polyurethane with self-healing properties by introducing the dynamic Schiff bond into the backbone of polyurethane. In addition, the self-healing polyurethane was endowed with AIE molecule by condensation reaction. The increase in polyurethane hard segments significantly enhanced their mechanical strength, meanwhile, the prepared polyurethane film showed excellent self-healing properties with a self-healing efficiency of 70%. Upon incorporating AIE molecules into the polyurethane backbone, the resulting film exhibited pronounced yellow-green fluorescence under illumination. The PU solution as a fluorescent ink was used to print the pattern on the surface of polypropylene nonwoven fabric <i>via</i> screen printing. This offers a potential approach for achieving surface patterning on textiles using fluorescent self-healing polyurethane inks.</p> Graphical abstract <p></p>

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Photoluminescent self-healing polyurethane as fluorescent ink for printing pattern

  • 期刊论文

  • 发表日期：

    2026年1月3日

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  • Jing Li,
  • Qingqing Li,
  • Xiaoqiong Hao,
  • Long Yang,
  • Yinzhou Guo

摘要

Polyurethane possesses excellent characteristics of high elasticity and high strength, making them very important for many applications, but developing high-performance polyurethanes with new properties to meet the needs of different fields remains a challenge. In this work, we developed a polyurethane with self-healing properties by introducing the dynamic Schiff bond into the backbone of polyurethane. In addition, the self-healing polyurethane was endowed with AIE molecule by condensation reaction. The increase in polyurethane hard segments significantly enhanced their mechanical strength, meanwhile, the prepared polyurethane film showed excellent self-healing properties with a self-healing efficiency of 70%. Upon incorporating AIE molecules into the polyurethane backbone, the resulting film exhibited pronounced yellow-green fluorescence under illumination. The PU solution as a fluorescent ink was used to print the pattern on the surface of polypropylene nonwoven fabric via screen printing. This offers a potential approach for achieving surface patterning on textiles using fluorescent self-healing polyurethane inks.

Graphical abstract