LED封装用透明环氧的抗紫外老化性能研究

发光二极管（LED）作为新型高效固体光源,具有长寿命、节能、绿色环保等显著优点,其经济和社会意义巨大。本文以复合材料这一学科前沿为研究方向,以提高LED封装用环氧树脂的老化寿命为目的,分两个阶段对LED封装用环氧树脂进行了改性研究。研究发现,所选各种光稳定剂对环氧树脂均有抗紫外老化作用,其中氧化锌的抗紫外老化能力最强,采用0.07wt%ZnO增强的ZnO环/氧纳米复合材料封装的LED比用EP-400封装的LED寿命提高76%。受阻胺类光稳定剂与紫外吸收剂共同使用时具有协同效应,最佳改性环氧树脂封装的LED比未经改性环氧封装的LED的寿命提高了170%。

Research on Uvioresistant Aging Properties of LED Discoloration of Transparent Epoxy Resins as Encapsulating Materials

AS the new kind of high efficiency of social light power,the light-emitting diode（LED） has the characteristic of longevity,energy-saving,and the potential economic and social value.At the same time,discoloration of epoxy resins as encapsulating materials and maintenance of light output intensity have become the major issues.The results indicate that all the selected photo-stabilizers have excellent compatibility with epoxy.It was shown that ZnO possesses the best photo-stabilization effect and the lifetime of LED has been improved by 76%.Moreover,the simultaneous usage of organic photo-stabilizers of HALS with UV-absorbers show a synergetic effect on the lifetime of LED lamps and the lifetime of LED encapsulated with the optimally modified epoxy resin has been improved by 170% compared to the LED lamp encapsulated with the pure transparent epoxy resin（EP-400）.