Abstract The combination of organic and inorganic components has become an challenging for the generation of new materials with preeminent properties over pure constituents. In the present work, a novel hybrid photoinitiator for free radical photopolymerization, belonging to the thioxanthone derivatives, was obtained via chemical joint between silica and 2-chlorothioxanthone (CTX) under a mild preparation condition. This multifunctional supported photoinitiator (silica-s-CTX) can not only initiate the photopolymerization with higher efficiency than traditional photoinitiator CTX, but also prominently improve the dispersion of nanoparticles in the epoxy acrylates resin which brings to the preeminent mechanical properties of UV-cured coatings. Importantly, the amount of residual-free PIs in silica-s-CTX curing system shows a significant decrease comparing with the filled and unfilled CTX curing system. After endowing the silica nanoparticles with photo-initiated performance, it may offer new scientific and technological opportunities for the preparation of high performance UV-curing coatings.

中文翻译：

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作为多功能光引发剂的有机和无机杂化纳米粒子的合成及其在紫外光固化环氧丙烯酸酯基涂料体系中的应用

摘要 有机和无机组分的结合已成为产生具有优于纯组分性能的新材料的挑战。在目前的工作中，通过二氧化硅和 2-氯噻吨酮 (CTX) 之间的化学结合，在温和的制备条件下，获得了一种新型的用于自由基光聚合的杂化光引发剂，属于噻吨酮衍生物。这种多功能负载型光​​引发剂 (silica-s-CTX) 不仅能以比传统光引发剂 CTX 更高的效率引发光聚合，而且显着改善纳米粒子在环氧丙烯酸酯树脂中的分散性，从而使 UV 固化涂料具有卓越的机械性能. 重要的，与填充和未填充的 CTX 固化体系相比，silica-s-CTX 固化体系中无残留 PI 的数量显着减少。赋予二氧化硅纳米粒子光引发性能后，可能为制备高性能紫外线固化涂料提供新的科学技术机会。