Abstract
Developing easy and green strategy to prepare functional materials with outstanding properties based on naturally abundant and environmentally friendly raw materials is highly desirable for sustainable development. Herein, an easy and green strategy was reported to in situ synthesize and disperse citrate-based fluorophores (CFs) in polyvinyl alcohol (PVA) matrix. By a simple heating treatment of the mixture aqueous solution of citric acid/cysteine/PVA, CF–PVA blends were obtained in the form of homogeneous transparent films or coatings. Due to the effective UV absorption of CFs, CF–PVA film and coating exhibited full-band blocking of UV irradiation while still allowing high transmission of visible light. Protection by CF–PVA film and coating effectively reduced UV-induced rhodamine B degradation and cell death. Furthermore, the down-conversion property of CF–PVA coating enables conversion of invisible UV irradiation into visible blue light emission, and we further demonstrated the application of CF–PVA coating for fabricating emissive transparent display. Given the abundant and environmentally friendly raw materials, easy and green preparation, excellent UV-blocking, and converting properties, we believe that the CF–PVA blends are promising for applications in UV shielding, transparent display, and energy harvesting.
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Acknowledgements
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Grant Nos. 51773120 and 51802201), the Natural Science Foundation of Guangdong (Grant Nos. 2016A030313050 and 2017A030310045), the Science and Technology Project of Shenzhen City (Grant Nos. JCYJ20170412105034748, CYZZ20150827160341635, and ZDSYS201507141105130), the Top Talent Launch Scientific Research Projects of Shenzhen (827-000133), and Undergraduate Innovation and Entrepreneurship training program (Grant No. 201810590053). This research is also supported by General Research Fund grant from the Research Grants Council of Hong Kong (Project No. 14220716). The authors thank Prof. Liming Bian (Department of Biomedical Engineering, The Chinese University of Hong Kong) for the helpful discussion on cell test and material supply.
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Chen, H., Li, R., Xu, X. et al. Citrate-based fluorophores in polymeric matrix by easy and green in situ synthesis for full-band UV shielding and emissive transparent display. J Mater Sci 54, 1236–1247 (2019). https://doi.org/10.1007/s10853-018-2933-9
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DOI: https://doi.org/10.1007/s10853-018-2933-9