二苯甲酮LED光引发剂的合成及性能研究  

The Synthesis and Performance of Benzophenone-based LED Photoinitiators

作　　者：武青青 王洪 张青 李付绍 邓明森[1] Wu Qingqing;Wang Hong;Zhang Qing;Li Fushao;Deng Mingsen(Guizhou Provincial Key Laboratory of Computational Nano-Material Science,Guizhou Education University,Guiyang 550018,China)

机构地区：[1]贵州师范学院,贵州省纳米材料与计算重点实验室,贵阳550018

出　　处：《涂料工业》2024年第4期37-46,共10页Paint & Coatings Industry

基　　金：国家自然科学基金(52062006);贵州省创新团队[Grant QKHPTRC(2020)5023];贵州师范学院奖补资金项目(2023GZJB001);贵州省高等学校大学生创新创业训练计划项目(S202214223076)。

摘　　要：为了延长二苯甲酮光引发剂的吸收波长,使其与LED光源更好的匹配,本研究将苄氨基基团引入二苯甲酮结构,合成了3种4-双苄胺基二苯甲酮衍生物,其吸收波长延长至400 nm,与不同波长(365~405 nm)的LED光源能较好的匹配。利用实时红外对其光聚合动力学进行测试,通过电化学测试以及光降解测试等对其作用机理进行研究。结果表明:双苄胺基二苯甲酮衍生物是一类高效的LED光引发剂,其可作为单组分光引发剂引发1,6-己二醇二丙烯酸酯发生自由基聚合,双键转化率可达80%~83%。与碘鎓盐复配,引发阳离子聚合时环氧单体转化率可达45%,引发自由基-阳离子混杂光固化时双键转化率为69%~71%,环氧单体转化率为58%~61%,在自由基聚合及互穿网络聚合物结构光固化材料制备方面存在潜在应用价值。In order to extend the absorption region of benzophenone derivatives for better matching with LED light sources,three 4-bis(benzylamino)benzophenone derivatives were synthesized by introducing benzylamino group into benzophenone structure.Their absorption wavelengths were extended to 400 nm,which could well match with LEDs at 365-405 nm.The photopolymerization kinetics was studied by real-time FT-IR,and the photoinitiation mechanism was clarified by electrochemical tests and photodegradation tests.The results showed that bis(benzylamino)benzophenone derivative was an efficient LED photoinitiator,which could initiate the free radical polymerization of 1,6-hexanediol diacrylate with the double bond conversion of 80%-83%.When combined with iodonium salt,the epoxy monomer conversion reached 45%for cationic polymerization,the double bond and epoxy monomer conversion rates were 69%-71%and 58%-61%,respectively,for radical-cation hybrid photocuring,showing potential application value in the field of free radical polymerization and interpenetrating polymer network photocurable material preparation.

关 键 词：二苯甲酮衍生物 光引发剂 互穿聚合物网络 

分 类 号：TQ637.83[化学工程—精细化工]