Abstract ZnAl layered double hydroxides (LDH) was selected as fluorinated filler of photoactivated Bis-GMA/Bis-EMA/TEGDMA resin. The ability of LDH to intercalate fluoride anions and to release them over the time, made this material a good filler to prepare acrylic resin composites with the potential of preventing dental caries. Moreover, LDH in fluoride form was functionalized on the surface by methacrylate anions (MA) which are able to participate to the polymerization process of the resin. This strategy allowed to improve the polymer/filler interactions and subsequently the mechanical properties of the final composite. LDH containing both fluoride and methacrylate anions were prepared with different methods. The best samples, selected on the basis of mechanical properties, were obtained starting from LDH intercalated with fluoride and then exposed to a partial exchange of the fluoride with methacrylate anions (LDH-F/MA). The effect of the presence of the fillers, which were LDH-F/MA and LDH intercalated with MA (LDH-MA), on the resin degree of conversion (DC) and on mechanical properties was investigated. Composites with DC of 75% showed an improvement in the mechanical properties in comparison with those of the pure resin. Moreover, the composites were able to release fluoride anions and to recapture them when contacted with fluoride solution.

中文翻译：

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层状双氢氧化物嵌入氟离子和甲基丙烯酸根阴离子作为牙科复合材料丙烯酸树脂的多功能填料

摘要 ZnAl 层状双氢氧化物（LDH）被选为光活化 Bis-GMA/Bis-EMA/TEGDMA 树脂的氟化填料。LDH 嵌入氟阴离子并随时间释放它们的能力使这种材料成为制备具有预防龋齿潜力的丙烯酸树脂复合材料的良好填料。此外，氟化物形式的 LDH 在表面被甲基丙烯酸阴离子 (MA) 官能化，这些阴离子能够参与树脂的聚合过程。这种策略可以改善聚合物/填料的相互作用，进而改善最终复合材料的机械性能。含有氟离子和甲基丙烯酸根阴离子的 LDH 用不同的方法制备。根据机械性能选择的最佳样品，由插入氟化物的LDH开始获得，然后暴露于氟化物与甲基丙烯酸酯阴离子（LDH-F/MA）的部分交换。研究了填料 LDH-F/MA 和 LDH 与 MA (LDH-MA) 的存在对树脂转化率 (DC) 和机械性能的影响。与纯树脂相比，DC 为 75% 的复合材料的机械性能有所改善。此外，复合材料能够释放氟阴离子并在与氟溶液接触时重新捕获它们。与纯树脂相比，DC 为 75% 的复合材料的机械性能有所改善。此外，复合材料能够释放氟阴离子并在与氟溶液接触时重新捕获它们。与纯树脂相比，DC 为 75% 的复合材料的机械性能有所改善。此外，复合材料能够释放氟阴离子并在与氟溶液接触时重新捕获它们。