水性聚氨酯荧光材料的制备及其荧光性能

Synthesis and Fluorescence Properties of Waterborne Polyurethane Fluorescent Materials

摘要: 将4-胺基-4′-(N, N-二苯基氨基)-1,2-二苯乙烯（ADAS）溶解于N,N-二甲基甲酰胺（DMF）中后分别以混合和接枝的方式引入水性聚氨酯，制备了不同软段和扩链剂的水性聚氨酯荧光材料（FWPU）。采用傅里叶变换红外光谱、荧光光谱表征了FWPU的结构和荧光性能。结果表明：水性聚氨酯的软段和扩链剂结构均可影响FWPU的荧光强度；与溶解同样浓度ADAS的DMF溶液相比，混合法制备的FWPU其荧光强度最大可以增加76倍，接枝法制备的FWPU最大可增加47倍。

Abstract: Waterborne polyurethane fluorescent (FWPU) materials with different soft segments and chain extenders were synthesized through blending or grafting 4-amine-4′-(N,N-diphenyl-amino)-1,2-stilbene (ADAS) which dissolved in N,N-dimethylformamide (DMF). Fourier transform infrared spectroscopy was used to characterize the structure of FWPU, and fluorescence spectroscopy was used to analyze the fluorescence properties. Results showed that the soft segment and the chain extender structure affected the fluorescence intensity of FWPU. The fluorescence intensity increased by up to 76 times through blending, 47 times through grafting when compared with the same concentration of ADAS dissolved in DMF.