基于二苯乙烯荧光增白剂的多功能光稳定剂的合成及性能

Synthesis and Properties of Multifunctional Light Stabilizer Based on Triazine-Stilbene Fluorescent Brightening Agents

以三聚氯氰为交联单体,将紫外线吸收剂2,4-二羟基二苯甲酮与二苯乙烯型荧光增白剂引入同一分子中,再与聚乙二醇系列产品发生缩聚反应合成了结构新颖的多功能光稳定剂(FBs)。采用红外光谱、核磁共振波谱、紫外光谱、荧光光谱等分析方法对其分子结构及光学性质进行了表征和初步研究,并考察其在纸张上的应用效果。结果表明,经光照后,双三嗪氨基二苯乙烯荧光增白剂(VBL)活性组分只占28.86%,而多功能光稳定剂FBs-400占61.80%,并且质量浓度超过1 g/L后出现荧光浓度自猝灭,比VBL(1×10-5kg/L)使用范围更广;紫外光加速老化实验表明,合成的多功能光稳定剂对纸张增白效果及光抑制效果更好,能显著提高光化学稳定性。

The multifunctional light stabilizer was synthesized through joining the 2, 4-dihydroxy- benzophenone （a ultraviolet absorber）, triazine-stilbene fluorescent brighteners and the series of polyethylene glycol（PEG） in the same molecule with cyanuric Chloride as the crosslinking monomer. The molecular structures were characterized by means of IR spectra and 1HNMR, the physical properties were examined by UV spectra and photoluminescence （PL） spectra, and the application effect of the light stabilizer in paper sheet was tested. The results show that the active ingredient of triazine-stilbene fluorescent brighteners （ VBL ） was 28.86% , while the active ingredient of the muhifunctional light stabilizer （FBs -400 ） was 61.8% after illumination. The fluorescence was quenched when the concentration of the light stabilizer was over 1 g/L, and its range of application is wider than that of VBL（ 1 ×10 -5 kg/L）. The brightening effect and light stability of the muhifunctional light stabilizer are nice in the performance of application. At the same time, its light stability is significantly improved.