UV-LED光固化体系光引发剂的新进展

本文综述了可用于UV-LED光固化体系光引发剂的研究进展，包括传统光引发剂及其衍生物（硫杂蒽酮类、二苯甲酮类和酰基膦氧化物）、新型基团的光引发剂（咔唑基、萘酰亚胺基、吩嗪基、苯丙二茂基、咪唑基和三嗪基）以及高分子光引发剂。传统光引发剂的改性和大分子光引发剂的合成，可以提高引发剂的稳定性。新型光引发剂的吸收波长与UV-LED光固化的发射波长匹配性较好，但该类光引发剂常需要加入助剂。此外，描述了氧阻聚对光固化体系的影响，指出了目前UV-LED光引发剂存在的不足，并展望了其发展应用前景。。

New development of photoinitiators for UV-LED curing system

The research progress of photoinitiatios that used in UV-LED curing system was reviewed, which including traditional photoinitiators and their derivatives (thioxanenones, diphenylmethyl ketones and acylphosphine oxides), photoinitiators of new groups (carbazolidyl, naphthalimide, phenazinyl, phenylmalinyl, imidazolidyl and triazinyl) and macromolecular photoinitiators. The stability of photoinitiator can be improved through the modification of traditional photoinitiator and synthesis of macromolecular photoinitiator. The absorption wavelength of the new photoinitiator has a good match with the emission wavelength of UV-LED curing, while this kind of photoinitiator often needs auxiliary agent. Furthermore, the influence of oxygen inhibition on photocuring system is described, the shortcomings of photoinitiators are pointed out and the development and the application of photoinitiators in the future is prospected