Capsule particles are widely used for various industrial applications. The interfacial photo-cross-linking of spherical polymer particles is a facile and safe approach for preparing capsule polymer particles. However, only ultraviolet light (e.g., λ = 265 nm) is used for the interfacial photo-cross-linking because the cinnamate group has been used as a ultraviolet light reactive group. In this study, we synthesize derivatives of 2-cinnamoylethyl methacrylate (CEMA) by introducing different substituents (o-nitro, m-nitro, p-nitro, and p-dimethylamino groups) to regulate the absorption wavelength of the photoreactive monomers. Using the photoreactive polymers comprising p-nitro-substituted CEMA, the interfacial photo-cross-linking reaction proceeds with λ = 365 nm LED light. Furthermore, interfacial photo-cross-linking proceeds with photoreactive polymers comprising p-dimethylamino-substituted CEMA with λ = 465 nm LED light as a visible light source. Moreover, the prepared hollow polymer particles with p-dimethylamino-substituted CEMA show the fluorescence property. Finally, we demonstrated wavelength-controlled selective interfacial photo-cross-linking of a polymer particle mixture comprising different photoreactive groups. Moreover, we successfully performed the interfacial photo-cross-linking of polymer particles with visible light.

中文翻译：

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使用具有取代肉桂酸酯的光反应性聚合物制造聚合物胶囊的可见光诱导界面光交联

胶囊颗粒广泛用于各种工业应用。球形聚合物颗粒的界面光交联是制备胶囊聚合物颗粒的简便且安全的方法。然而，由于肉桂酸酯基团已被用作紫外光反应基团，因此仅使用紫外光(例如，λ＝265nm)进行界面光交联。在本研究中，我们通过引入不同的取代基（邻硝基、间硝基、对硝基和对二甲氨基）来调节光反应单体的吸收波长，合成了甲基丙烯酸2-肉桂酰乙酯（CEMA）的衍生物。使用包含对硝基取代的 CEMA 的光反应性聚合物，界面光交联反应在 λ = 365 nm LED 光下进行。此外，界面光交联采用包含对二甲氨基取代的CEMA的光反应性聚合物进行，其中λ=465 nm LED光作为可见光源。此外，所制备的具有对二甲氨基取代的CEMA的中空聚合物颗粒显示出荧光性能。最后，我们证明了包含不同光反应基团的聚合物颗粒混合物的波长控制选择性界面光交联。此外，我们成功地在可见光下进行了聚合物颗粒的界面光交联。