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Ultrasonic-assist photopolymerization initiated by triphenylamine derivatives: from the construction of one-component photoinitiating systems via fluorescence-tuning strategy
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V
J
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DOI：10.1016/j.dyepig.2026.113667.png)
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Abstract
En 中文
Photo-induced polymerization plays a very important role in the synthesis of polymer materials. In order to promote the printing performance, ultrasonic power has been introduced into the photocuring technique based on photopolymerization. Such a method could significantly enhance the depth of polymerization, making the objects printed with outsize feasible. However, corresponding chemical mechanisms are still unclear as well as the chemical structures of initiators need to be optimized. Herein this work, four synthesized fluorescent compounds with triphenylamine group were introduced into so-called Ultrasonic-assist photopolymerization, where some of them were proved to construct one-component photoinitiating systems (PISs) and efficiently photo-initiate the photopolymerization of acrylate monomer in the absence of other co-initiator and additive. Remarkably, considering the fact that the radicals generated from these fluorescent dyes are hard to be detected by the electron spin resonance-spin trapping technique (EPR), corresponding chemical mechanisms were systematically examined by investigating the variation of their fluorescence and fluorescence lifetimes. What's more, such a method was also provide a facile way for studying the effects on photoinitiation capacities given by ultrasonic power. In fact, two hot-exciton materials involved in this work, which possess active reverse intersystem crossing and proper concentration of triplet exciton, can be regarded as new models for structurally designing high-performance photoinitiators (PIs) with better photoinitiation abilities and tunable fluorescence under ultrasonic optimization.
Keywords:
Ultrasonic-assist photopolymerization
Donor-acceptor structure
Free radical polymerization
3D printing
Fluorescence-tuning
Journal
IF:
4.2
Papers:
1.3W
Citations:
2.9W
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