三嗪氨基二苯乙烯型荧光增白剂改性及其应用前景

Modification and Application Prospects of Triazine-stilbene Fluorescent Brighteners

介绍了三嗪基氨基二苯乙烯型荧光增白剂的结构、性质、增白机理及影响其增白效果的因素,重点讨论了其合成、共聚改性以及缩聚改性。按照亲核性由弱到强次序,原料依次与三聚氯氰反应,通过高分子改性,可使其荧光反式活性分子固定在大分子链上,显著提高其增白性能、光化学稳定性和荧光量子产率,同时降低其光致异构现象。指出今后应重点开发高效环保液态型及耐强酸强碱的荧光增白剂,并认为缩聚改性、膜分离技术、复配增效以及开发合适的显白剂将是研究热点。

The structure, properties, whitening mechanism and the factors affected the whitening effect of triazine-stilbene fluorescent brighteners were introduced. The synthesis, polymer modification and cationic modification were discussed. According to size of nucleophilicity, materials reacted with cyanuric chloride in turn. Through the polymer modification, the trans-activity molecules were fixed into long-chains. This method could enhance the whitening performance and photochemical stability, increased the quantum yield of fluoreascence, and decreased photoinduced isomeric phenomena. And through the cationic modification, the acid/alkali as well as cationic polymer resistances were higher and the application was wider. The development of brighteners which had environment-friendly nature, liquid highly active, resistance to strong acid or base should given the emphases. Polycondensation modification, membrane filtration, and exploitation of suitable marked brightening agent would become the research hotspots.