茂铁盐阳离子光引发剂在胶粘剂中的应用  

Application of ferrocenium salt as cationic photoinitiator in adhesive

作　　者：罗逸骢 李治全 刘晓暄 Luo Yicong;Li Zhiquan;Liu Xiaoxuan(Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter,School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,Guangdong,China;Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang Center,Jieyang 522000,Guangdong,China)

机构地区：[1]广东工业大学材料与能源学院,广东省功能软凝聚态物质重点实验室,广东广州510006 [2]化学与精细化工广东省试验室揭阳分中心,广东揭阳1522000

出　　处：《中国胶粘剂》2023年第5期13-18,共6页China Adhesives

基　　金：国家自然科学基金项目(51873043);广东省重点领域研发计划项目(2020B090924001);韶关市科技重点项目(210901154532282)。

摘　　要：以2种茂铁盐(I-261、I-262)作为阳离子光引发剂,成功在405 nm LED光源下实现了阳离子胶粘剂的固化。选择3种环氧类单体,即双酚A二缩水甘油醚(BADGE)、3,4-环氧环己基甲基-3,4环氧环己基甲酸酯(CE)、3,3’-[氧基双(亚甲基)]双(3-乙基氧杂环丁烷)(DOX),研究了它们在405 nm LED光源下的光固化动力学,并研究了不同阳离子光引发剂的光引发性能、茂铁盐对不同阳离子单体的引发效率、环氧树脂的热稳定性、阳离子光固化胶粘剂的拉伸剪切性能以及后固化时间对胶粘剂拉伸剪切强度的影响。研究结果表明:确定了茂铁盐作为可见光固化胶粘剂用光引发剂的实用性,在405 nm LED光源下的引发效率均强于碘鎓盐光引发剂I-250。以BADGE作为主要单体,研究了在添加不同含量的CE与DOX形成的光固化胶粘剂的拉伸剪切性能。发现在40%的添加量下,混入CE与DOX的胶粘剂比BADGE本体聚合而成的胶粘剂的拉伸剪切强度分别提高了2.19倍与1.38倍,并且后固化时间的增加能够大幅提升胶粘剂的拉伸剪切强度。本研究为可见光固化的阳离子胶粘剂提供了一种切实可行的方法。Two types of ferrocenium salt(I-261 and I-262)were used as cationic photoinitiators,the cationic adhesive was successfully cured under 405 nm LED light source.Three types of epoxy monomers were selected,namely bisphenol-A diglycidyl ether(BADGE),3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate(CE),3,3'-[oxybis(methylene)]bis(3-ethyloxetane)(DOX),their photo curing kinetics were studied under 405 nm LED light source.The photoinitiation properties of different cationic photoinitiators,the initiation efficiency of ferrocenium salt on different cationic monomers,the thermal stability of epoxy resin,the tensile shear properties of cationic light-curing adhesive and the effects of post-curing time on tensile shear strength of adhesive were also investigated.The research results showed that the practicality of ferrocenium salts as photoinitiator for visible light curing adhesive was determined,their initiation efficiency was stronger than that of iodonium salt photoinitiator I-250 under 405 nm LED light source.Using BADGE as the main monomer,the tensile shear properties of photo curing adhesive formed by adding different contents of CE and DOX were studied.It was found that with the adding amount of 40%,the tensile shear strength of the adhesive mixed with CE and DOX was2.19 times and 1.38 times respectively higher than that of the adhesive polymerized by BADGE,and the tensile shear strength of the adhesive could be significantly improved with the increase of post-curing time.This study provided a practical method for visible light curable cationic adhesive.

关 键 词：茂铁盐 可见光固化 阳离子胶粘剂 光固化动力学 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TQ433.4