摘要
光产碱剂作为光固化材料体系中的关键组分,对光固化速率及固化材料性能有重要影响。本文以氧杂蒽酮作为生色团,脒类化合物DBN作为强碱基团,设计并合成了一种新型单组分氧杂蒽酮还原态脒类光产碱剂,并系统探究了其光物理和光化学行为。结果表明,氧杂蒽酮还原态脒类光产碱剂在345 nm区域具有较强吸收,光解后释放的强碱DBN可有效引发巯基-环氧体系聚合。与商品化苄基还原态脒类光产碱剂相比,氧杂蒽酮生色团的引入使光产碱剂的吸收波长红移,能更好地匹配365 nm LED光源;与离子型硫杂蒽酮光产碱剂相比,氧杂蒽酮还原态脒类光产碱剂在光解过程中不产生二氧化碳,且催化效率更高,具有良好的应用前景。
As a key component of photocuring system, a photobase generator has an important influence on the photocuring rate and properties of the cured materials. In this paper, a novel unimolecular amidine-based photobase generator, containing a xanthone as a chromophore and DBN as a latent active base functionality, was designed and synthesized. The photophysical and photochemical behaviors were systematically investigated.The results show that the synthesized photobase generator has strong absorption at 345 nm,and the DBN released after photolysis can effectively catalyze the polymerization of thiol-epoxy system.Compared with the commercial latent benzyl amidine photobase generator,the introduced xanthone chromophore makes the absorption wavelength red shift,matching with the 365 nm LED light.Compared with the ionic thioxantone-based photobase generator,the nonionic photobase generator does not produce CO2 after photolysis,which offer it great potentials for various applications.
作者
郑元俭
杨一男
陆华侨
刘仁
李治全
ZHENG Yuanjian;YANG Yi'nan;LU Huaqiao;LIU Ren;LI Zhiquan(International Research Center frr Photrresponsive Molecules and Materials,Jiangnan University,Wuxi 214122,J iangsu,P.R.China;School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,Jiangsu,P.R.China)
出处
《影像科学与光化学》
CAS
2020年第1期27-36,共10页
Imaging Science and Photochemistry
基金
国家自然科学基金项目（21404048）资助
