桐油在紫外光照条件下的光固化活性研究  

Study onphotocuring activity of tung oil under UV light

作　　者：张利 李普旺[1,2] 杨子明 何祖宇[1,2] 周伟 李积华 焦静[1,2] 周闯 ZHANGLi;LI Puwang;YANG Ziming;HE Zuyu;ZHOU Wei;LI Jihua;JIAO Jing;ZHOU Chuang(Key Laboratory of Tropical Crop Products Processing of Ministry of Agriculture and Rural Affairs,Agricultural Products Processing Research Institute,Chinese Academy of Tropical Agricultural Sciences,Guangdong 524001,China;Hainan Key Laboratory of Storage&processing of fruits and vegetables,Zhanjiang 524001,China)

机构地区：[1]中国热带农业科学院农产品加工研究所,农业农村部热带作物产品加工重点实验室,广东湛江524001 [2]海南省果蔬贮藏与加工重点实验室,广东湛江524001

出　　处：《功能材料》2020年第3期3089-3095,共7页Journal of Functional Materials

基　　金：海南省自然科学基金资助项目(219QN295,219QN294);中国热带农业科学院基本科研业务费专项资助项目资助(1630122017009,1630122017014);广东省现代农业产业技术体系创新团队建设专项资金资助项目(2019KJ140);广东省自然科学基金资助项目(2019A1515010714)

摘　　要：通过将桐油置于在不同的环境中,观察其成膜固化情况,研究桐油的光固化活性,通过测定桐油固化过程中的红外光谱、紫外光谱、过氧化值等来揭示桐油的光固化机理。研究结果表明:桐油的光固化过程包括氧化聚合反应和自由基聚合为主,其中以氧化聚合反应为主;氧气在桐油的光固化过程中起着关键的作用,氧气的主要作用是当桐油受光照后发生氢提取反应后,所形成的自由基与氧气形成氢过氧化物,促使桐油发生氧化聚合反应;阳离子光引发剂可以大大促进桐油光固化成膜,并且成膜具有良好的热稳定性。In this paper,tung oil was placed in different environments to observe the solidification behavior and explore the photocuring activity of tung oil.And the photocuring mechanism of tung oil was revealed by measuring the FTIR spectrum,UV spectrum,peroxide value,and so on.The results showed that the photocuring reaction process of tung oil mainly included oxidative polymerization and free radical polymerization,among which oxidative polymerization was the main reaction.Oxygen played a key role in the photocuring process of tung oil.The main function of oxygen was to form hydroperoxides with the free radicals formed after the reaction of hydrogen extraction of tung oil under UV light,which promoted the oxidative polymerization of tung oil.And the cationic photoinitiator could greatly promote the photocuring of tung oil and the formed film had a good thermal stability.

关 键 词：桐油 紫外光 光固化活性 光引发剂 氧化聚合 

分 类 号：TQ322.41[化学工程—合成树脂塑料工业]