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Green fluorescent waterborne polyurethane polyols

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Abstract

In this paper, we reported a series of green fluorescent flame-retardant waterborne polyurethane polyols. The polyurethane polyols were uniformly sized and possessed decent colloidal stability. Comparing to other reported products, our aqueous dispersions showed much stronger fluorescence intensity and greatly improved long-term stability, which were desired for practical applications. Small molecule conjugation units were gated into polyurethane chains via reaction between −OH of naphthalene and −NCO of diisocyanate, which restricts intramolecular rotation of naphthalene chromophores and non-radiative transition to enhance fluorescence intensity. The non-radiative transition and chromophore aggregation are weakened to hinder aggregation-caused quenching of chromophores to improve fluorescence by weak collision. This study has demonstrated a facile method to prepare waterborne polyurethane polyols, providing detailed explanation and guidance for related work in the future.

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Data availability

The authors declare that all data supporting the finding of this study are available within the paper and its supplementary information.

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Acknowledgments

This work is funded by the National Natural Science Foundation of China under grant no. 51605247 and the National Key Research and Development Program of China under grant no. 2016YFC0204400.

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Authors and Affiliations

  1. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China

    Xuan Yin

  2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China

    Xuan Yin & Yunjun Luo

  3. State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China

    Xuan Yin

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  1. Xuan Yin
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Contributions

Y.L. conceived the idea and designed the experiments. X.Y. and Y. L. synthesized the samples and performed all the experiments and data analysis. All authors contributed to the writing of the manuscript.

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Correspondence to Yunjun Luo.

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Yin, X., Luo, Y. Green fluorescent waterborne polyurethane polyols. Colloid Polym Sci 299, 845–853 (2021). https://doi.org/10.1007/s00396-021-04807-8

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  • DOI: https://doi.org/10.1007/s00396-021-04807-8

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