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首页> 外文期刊>RSC Advances >Multifunctional biphenyl derivatives as photosensitisers in various types of photopolymerization processes, including IPN formation, 3D printing of photocurable multiwalled carbon nanotubes (MWCNTs) fluorescent composites
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Multifunctional biphenyl derivatives as photosensitisers in various types of photopolymerization processes, including IPN formation, 3D printing of photocurable multiwalled carbon nanotubes (MWCNTs) fluorescent composites

机译：多官能联苯基衍生物作为各种类型的光聚合过程中的光敏剂，包括IPN形成，光固化多壁碳纳米管的3D印刷（MWCNT）荧光复合材料

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A series of 2-(diethylamino)-4-(1-ethylpropyl)-6-phenyl-benzene-1,3-dicarbonitrile derivatives were investigated in terms of photosensitisation in various photopolymerization processes in UV-A and vis light conditions. A full spectroscopic analysis of the tested compounds was performed. In addition to excellent spectroscopic properties, these compounds enable highly efficient photopolymerization processes, including free-radical, cationic and hybrid photopolymerization. As proven by a real-time FTIR study, these photosensitisers allow the formation of both thin and thick layers from different monomers. Finally, the investigated 2-(diethylamino)-4-(1-ethylpropyl)-6-phenyl-benzene-1,3-dicarbonitrile derivatives were used to obtain multiwalled carbon nanotubes (MWCNTs) composites for which the degree of conversion was determined using real-time FT-IR and Photo-Differential Scanning Calorimetry (Photo-DSC). Selected derivatives were applied as photosensitisers in two-component photoinitiating systems, operating according to the mechanism of photo-oxidation and photo-reduction, for the preparation of photo-cured MWCNTs composites. The importance of the quantity of multiwalled carbon nanotubes (MWCNTs) added to the polymeric matrix on the curing degree is also discussed in this study. The structures of the MWCNTs composites were analysed using an optical and fluorescence microscope. Moreover, this study also examines the applicability of new photoinitiator systems for printing nanocomposites by vat photopolymerization, which has gained increasing attention in recent years. Therefore, photocurable nanocomposite resin based on methacrylates was used for 3D printing in room temperature and atmospheric conditions, under a visible LED with emission at 405 nm, in order to obtain fluorescent photocurable patterns.
机译：在UV-A和Vis光条件下，在各种光聚合方法中的光敏性方面研究了一系列2-（二乙基氨基）-4-（1-乙基丙基）-6-苯基 - 苯-1,3-二羰基腈衍生物。进行测试化合物的全光谱分析。除了优异的光谱性质之外，这些化合物还能高效的光聚合方法，包括自由基，阳离子和杂化光聚合。经过实时的FTIR研究证明，这些光敏率允许从不同单体形成薄和厚的层。最后，使用所研究的2-（二乙基氨基）-4-（1-乙基丙基）-6-苯基 - 苯 - 苯-1,3-二羰基腈衍生物来获得多晶的碳纳米管（MWCNT）复合材料，使用转化程度实时FT-IR和光差分扫描量热法（Photo-DSC）。选择的衍生物在双组分光诱导系统中施加光敏剂，根据光氧化和光照的机理操作，用于制备光固化的MWCNTs复合材料。在该研究中还讨论了在聚合物基质上添加到聚合物基质上的多壁碳纳米管（MWCNT）的重要性。使用光学和荧光显微镜分析MWCNTS复合材料的结构。此外，本研究还研究了通过增值税光聚合的新型光引发剂系统对印刷纳米复合材料的适用性，近年来越来越受到关注。因此，基于甲基丙烯酸酯的光固化纳米复合材料在室温和大气条件下用于3D印刷，在405nm处发射的可见LED下，以获得荧光可光固化图案。

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