Synthesis and fluorescent investigations of VBL-based waterborne polyurethane dye |
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| Authors: | Xian-Hai Hu Xing-Yuan Zhang Jia-Bin Dai |
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| Institution: | a CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China
b School of Materials and Chemical Engineering, Anhui Institute of Architecture and Industry, Hefei 230022, PR China |
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| Abstract: | Fluorescent brightening agent VBL-based waterborne polyurethane dye (VBL-WPU) was synthesized by incorporation of VBL into waterborne polyurethane chains. The expected structure of polymeric fluorescent brightening agent was confirmed by FT-IR and UV-vis spectra. The molecular weight, average particle sizes and the contents of VBL segments in VBL-WPU were investigated. This polymeric dye exhibited intriguing optical behaviors. The absorption and emission maxima of VBL-WPU showed obviously hypsochromic shift in comparison with those of VBL. The fluorescence intensity of the polymer was prominently enhanced comparing with VBL because of the changes of micro-circumstance of VBL. Furthermore, the fluorescence of VBL-WPU was not sensitive to hydroquinone quencher. |
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| Keywords: | Waterborne polyurethane Fluorescent polymer Fluorescent brightening agent VBL Optical materials and properties Fluorescence enhancement |
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