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<p>Non-isocyanate polyurethanes have rapidly risen as an environmentally friendly substitute to traditional isocyanate-based polyurethanes. Here, a crosslinked non-isocyanate polyurethane (CNIPU) was prepared with cyclic carbonate, polyamine, and diglycidyl ether via simple ring-opening and transcarbamoylation methods. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirm the successful preparation of CNIPU. When the CNIPU is used as the pigment-dyeing binder for cotton fabric, the thermochromic microcapsules can be fixed on the fiber surface. The dyed fabric shows excellent thermochromic property and its color fastness can reach above 4 grade. This work offers an efficient strategy to utilize non-isocyanate polyurethane to fabricate pigment-dyed fabrics with green and sustainable route.</p> Graphical abstract <p></p>

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Environmentally friendly non-isocyanate polyurethane binder for pigment dyeing

  • 期刊论文

  • 发表日期：

    2025年1月10日

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  • Haiyan Mao,
  • Yang Guo,
  • Qin Han,
  • Xuemei He,
  • Chenghui Zheng

摘要

Non-isocyanate polyurethanes have rapidly risen as an environmentally friendly substitute to traditional isocyanate-based polyurethanes. Here, a crosslinked non-isocyanate polyurethane (CNIPU) was prepared with cyclic carbonate, polyamine, and diglycidyl ether via simple ring-opening and transcarbamoylation methods. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirm the successful preparation of CNIPU. When the CNIPU is used as the pigment-dyeing binder for cotton fabric, the thermochromic microcapsules can be fixed on the fiber surface. The dyed fabric shows excellent thermochromic property and its color fastness can reach above 4 grade. This work offers an efficient strategy to utilize non-isocyanate polyurethane to fabricate pigment-dyed fabrics with green and sustainable route.

Graphical abstract