二苯乙烯型荧光聚合物复合纳米SiO2粒子的制备及性能研究

Preparation and Properties of Stilbene Type Fluorescent Polymer Composite Nanosized SiO2 Particles

摘要:

以4，4’-二氨基二苯乙烯- 2，2’- 二磺酸（DSD酸）为发光母体，三聚氯氰为交联剂，利用亲核取代反应将对氨基苯磺酸、壳寡糖引入到发光母体上，合成了一种悬挂型壳寡糖荧光低聚物（COS-FBs）。然后将其作为反应原料，利用改进的stober合成法制备出了一种荧光纳米粒子聚合物（SiO2/ COS-FBs）。利用红外光谱、X射线光电子能谱（XPS）和透射电子显微镜（TEM）研究了其结构、形貌、尺寸，紫外分光光度计和荧光分光光度计研究了其光物理性能，同时也通过紫外老化实验考察了其在纸张上的返黄抑制效果。结果表明，合成出来的荧光纳米粒子聚合物（SiO2/ COS-FBs）具有规则的球形结构，粒子尺寸为 90 nm左右；与未经纳米改性的荧光低聚物（COS-FBs）相比，紫外吸收变宽，荧光强度提高；同时其纸张增白和光返黄抑制效果有所提升。

Abstract:

With 4,4'-diaminostilbene-2,2'-disulfonic acid (DSD acid) as the luminescent parent and cyanuric chloride as the crosslinking agent, a pendant chitosan oligosaccharide fluorescent oligomer （COS-FBs）was synthesized by nucleophilic substitution reaction. A fluorescent nanoparticle polymer （SiO2/ COS-FBs）was prepared with COS-FBs as material by the improved Stober synthesis method. Its structure, morphology and particle size were studied by FTIR, XPS, TEM and their photophysical properties were studied by UV spectra and photoluminescence. At the same time, the effect of returning to yellow on paper was also investigated by UV aging experiment. The results showed that the synthesized fluorescent nanoparticles （SiO2/ COS-FBs）had regular spherical structure with a particle size of 90 nm. Compared with the fluorescent oligomers without nano modification, UV absorption was broadened, fluorescence intensity was improved, the brightening effect and light stability were nice in the performance of application.