阳离子光引发剂敏化的研究进展

doi:10.7517/j.issn.1674-0475.2013.01.009

摘要/Abstract

摘要： 常用的阳离子光引发剂吸收波长在250—300 nm,与紫外光固化设备的辐射波长不匹配,光引发速率和效率低.本文介绍了阳离子光引发剂的种类、特点以及使引发剂体系吸收红移的研究,着重总结了阳离子光引发剂的敏化理论和技术.概述的敏化机理包括:能量转移、自由基氧化、激发态复合物和碎片加成.常用敏化方法有:添加光敏剂、扩大分子共轭使吸收红移和键合生色基团.文章还对新型阳离子光引发剂和光敏剂的设计和应用给予了展望.

关键词: 紫外光固化, 阳离子光引发剂, 光敏剂, 光敏化机理

Abstract: The curing rate and quantum efficiency of cationic photoinitiators are relatively low because the UV absorption of the photoinitiators ranges from 250 nm to 300 nm normally and does not match with the wavelength of light from UV light sources. To make the absorption red-shift, many efforts have been devoted onto the photosensitization of the photoinitiators. The achievements on the sensitization of the cationic photoinitiators have been summarized here. The sensitization is mainly based on the mechanisms as energy transfer, oxidation of free radical,electron transfer via exciplexes and addition fragmentation reaction. The methods adopted for the sensitization include adding photosensitizer,expanding molecular conjugation and attaching chromophore. The development of the photoinitiators and photosensitizers has been outlined and the applications of novel cationic photoinitiators and photosensitizers have been forecasted.

Key words: UV curing, cationic photoinitiator, photosensitizer, sensitization

中图分类号:

张洪, 李建雄, 刘安华. 阳离子光引发剂敏化的研究进展[J]. 影像科学与光化学, 2013, 31(1): 69-78.

ZHANG Hong, LI Jian-xiong, LIU An-hua. Progresses on Sensitization of Cationic Photoinitiators[J]. Imaging Science and Photochemistry, 2013, 31(1): 69-78.

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