A novel fluorescent aqueous polyurethane emulsion DDAQ-TDI-PU was synthesized by blocking the anthraquinone moiety of 1,4-diamino-2,3-diphenoxyanthraquinone（DDAQ） into polyurethane chain using 2,4-tolylene diisocyan...A novel fluorescent aqueous polyurethane emulsion DDAQ-TDI-PU was synthesized by blocking the anthraquinone moiety of 1,4-diamino-2,3-diphenoxyanthraquinone（DDAQ） into polyurethane chain using 2,4-tolylene diisocyanate（TDI）,poly（propylene glycol） and 2,2-dimethylol propionic acid.The chain structure of DDAQ-TDI-PU was confirmed by means of Fourier transform infrared spectroscopy and UV-vis analysis.Comparing to the UV-vis spectrum of DDAQ,DDAQ-TDI-PU showed a hypsochromic shift from the absorption maxima of 518,558,609 nm to 510,548,586 nm,respectively.It was found that the fluorescence intensity of DDAQ-TDI-PU emulsion was enhanced greatly comparing with that of DDAQ.The fluorescence of DDAQ-TDI-PU was very stable not only for the long term storage but also for the fluorescence quencher.展开更多
A novel waterborne stilbene-based polyurethane fluorescent brightener dispersion WPU-VBL was synthesized by incorporating chemically disodium 4,4＇-bis[（4-anilino-6-hydroxyethylamino-1,3,5-triazin-2-yl）amino]stilben...A novel waterborne stilbene-based polyurethane fluorescent brightener dispersion WPU-VBL was synthesized by incorporating chemically disodium 4,4＇-bis[（4-anilino-6-hydroxyethylamino-1,3,5-triazin-2-yl）amino]stilbene-2,2＇-disulphonate（VBL） into the polyurethane chain using isophorone diisocyanate,poly（propylene glycol） and 2,2-dimethylol propionic acid.The structure of WPU-VBL was confirmed by means of Fourier transform infrared spectroscopy.The UV-vis absorption analysis showed a hypsochromic shift of 16 nm when VBL was blocked into polyurethane chain.Number average molecular weight of 2.1×10~4, molecular weight distribution of 2.1 and average latex particle size of about 70 nm for WPU-VBL were determined based on the analysis of gel permeation chromatography and laser particle size analyzer.It was found that the fluorescence intensity of WPU-VBL was prominently enhanced because of the micro-circumstance of VBL and the fluorescence of WPU-VBL was very stable.展开更多
基金Financial supports from the National Natural Science Foundation of China(No.51073144)Natural Science Foundation of Anhui Education Department(No.KJ2011B051)
文摘A novel fluorescent aqueous polyurethane emulsion DDAQ-TDI-PU was synthesized by blocking the anthraquinone moiety of 1,4-diamino-2,3-diphenoxyanthraquinone（DDAQ） into polyurethane chain using 2,4-tolylene diisocyanate（TDI）,poly（propylene glycol） and 2,2-dimethylol propionic acid.The chain structure of DDAQ-TDI-PU was confirmed by means of Fourier transform infrared spectroscopy and UV-vis analysis.Comparing to the UV-vis spectrum of DDAQ,DDAQ-TDI-PU showed a hypsochromic shift from the absorption maxima of 518,558,609 nm to 510,548,586 nm,respectively.It was found that the fluorescence intensity of DDAQ-TDI-PU emulsion was enhanced greatly comparing with that of DDAQ.The fluorescence of DDAQ-TDI-PU was very stable not only for the long term storage but also for the fluorescence quencher.
基金Financial supports from the National Natural Science Foundation of China(No.51073144)Anhui Provincial Education Department(Nos.KJ2008B165 and KJ2010B039)
文摘A novel waterborne stilbene-based polyurethane fluorescent brightener dispersion WPU-VBL was synthesized by incorporating chemically disodium 4,4＇-bis[（4-anilino-6-hydroxyethylamino-1,3,5-triazin-2-yl）amino]stilbene-2,2＇-disulphonate（VBL） into the polyurethane chain using isophorone diisocyanate,poly（propylene glycol） and 2,2-dimethylol propionic acid.The structure of WPU-VBL was confirmed by means of Fourier transform infrared spectroscopy.The UV-vis absorption analysis showed a hypsochromic shift of 16 nm when VBL was blocked into polyurethane chain.Number average molecular weight of 2.1×10~4, molecular weight distribution of 2.1 and average latex particle size of about 70 nm for WPU-VBL were determined based on the analysis of gel permeation chromatography and laser particle size analyzer.It was found that the fluorescence intensity of WPU-VBL was prominently enhanced because of the micro-circumstance of VBL and the fluorescence of WPU-VBL was very stable.
