基于多重氢键自愈合光学胶的制备与性能研究  

Preparation and performance study of multiple hydrogen bonds-based self-healing optical adhesive

作　　者：叶迪辉 汪加胜 唐舫成 乔立根 齐圣光 曾西洋 Ye Dihui;Wang Jiasheng;Tang Fangcheng;Qiao Ligen;Qi Shengguang;Zeng Xiyang(Guangzhou Lushan New Materials Co.,Ltd.,Guangzhou 510530,Guangdong,China;Guangzhou Lushan Advanced Materials Co.,Ltd.,Guangzhou 510530,Guangdong,China)

机构地区：[1]广州鹿山新材料股份有限公司,广东广州510530 [2]广州鹿山先进材料有限公司,广东广州510530

出　　处：《中国胶粘剂》2024年第8期22-28,45,共8页China Adhesives

基　　金：港澳科技成果来粤产业化专题(柔性显示用光学透明胶在复杂环境下的关键性能研究及产业化开发)(2023A0505030017)。

摘　　要：在消费电子和5G通讯快速发展趋势下,OCA光学胶在光电子领域的需求持续增加。然而,在OCA光学胶的使用或加工过程中,常常会出现由材料缺陷而导致材料性能变差的问题,甚至进一步导致材料的报废,这使得具有自愈合能力的OCA光学胶表现出巨大的市场潜力。本文制备了一种含四重氢键的2-脲基-4[1H]-嘧啶酮甲基丙烯酸甲酯(UPyMA)单体,将质量分数分别为5%、10%、15%和20%的UPyMA引入到聚氨酯丙烯酸酯、丙烯酸-2-乙基己基酯和丙烯酸异冰片酯共聚物体系中。使用2-羟基-2-甲基苯基丙烷-1-酮作为光引发剂,γ-缩水甘油醚氧丙基三甲氧基硅烷作为增黏剂,通过紫外光引发聚合制备了一系列具有自愈合功能的OCA光学胶,并测定或表征了其结构、透光率、流变性能、拉伸性能以及自愈合等性能。研究结果表明:(1)成功制备了UPyMA和一系列具有自愈合功能的OCA光学胶。(2)所有OCA光学胶都未产生气泡和晶点,并且它们雾度都小于0.50,可满足触控显示领域产品对OCA光学胶的需求。(3)对加入UPyMA不同质量分数(0~20%)的OCA光学胶进行不锈钢板的180°剥离力测试,当UPyMA含量为15%时,粘接力最大(为25.5 N)。(4)分析了添加不同含量UPyMA的OCA光学胶储能模量(G')和损耗模量(G″)的温度依赖性。所有OCA光学胶在室温下具有较好的流动性和界面润湿性能,从而赋予了OCA光学胶较好的粘接性能。(5)加入UPyMA后的自愈合效率明显提高,为延长材料使用寿命提供了有利条件。(6)高温高湿耐老化试验表明,所制备产品均可满足应用要求,表明其在高温高湿下具有较好的耐老化性能。Under the rapid development trend of consumer electronics and 5G communication,the demand for OCA optical adhesive in the field of optoelectronics continues to increase.However,during the use or processing of OCA optical adhesive,the problem of deterioration of material properties due to material defects often occurs,even further leading to the scrapping of materials,which makes OCA optical adhesive with self-healing ability show great market potential.In this paper,2-ureido-4[1H]-pyrimidinone methacrylate(UPy MA) monomer containing quadruple hydrogen bonds was prepared,and UPyMA with mass fractions of 5%,10%,15%,and 20% was introduced into a copolymer system of polyurethane acrylate,2-ethylhexylacrylate and isobornyl acrylate,respectively.A series of OCA optical adhesives with self-healing function were prepared by UV induced polymerization,with 2-hydroxy-2-methylphenylpropane-1-ketone as the photoinitiator and γ-glycidoxypropyltrimethoxysilane as the tackifier agent.Their structures,light transmittance,rheological properties,tensile properties,and self-healing properties were measured or characterized.The research results showed that,(1) UPyMA and a series of OCA optical adhesives with self-healing function were successfully prepared.(2) All OCA optical adhesives did not produce bubbles or crystal dots,and their haze was all less than 0.50,which could meet the demand for OCA optical adhesives in the field of touch display products.(3) The 180° peel strength of OCA optical adhesives with different mass fractions(0-20%) of UPyMA was tested on stainless steel plates.When the UPyMA content was 15%,the bonding power was the highest(25.5 N).(4) The temperature dependence of storage modulus(G') and loss modulus(G″) of OCA optical adhesives with different contents of UPyMA was analyzed.All OCA optical adhesives had good flowability and interfacial wetting properties at room temperature,which endowed OCA optical adhesives with good bonding properties.(5) The self-healing efficiency was significantly improved after a

关 键 词：OCA光学胶 UPyMA单体 紫外光引发聚合 自愈合 

分 类 号：TQ430[化学工程]