结合可见光固化技术和乳液聚合技术应用于纳米级复合乳液的制备。选用甲基丙烯酸甲酯为单体,在可见光发光二极管最大发射波长为430nm(LED@430nm)的光源辐照下,以荧光增白剂和二苯基碘鎓六氟磷酸盐组成的二元光引发体系制备了有机改性蒙脱土(OMMT)/聚甲基丙烯酸甲酯纳米复合乳液。结果表明:高浓度十六烷基三甲基溴化铵改性所得OMMT在相同反应条件下有效地促进了单体的转化率;更重要的是,可见光引发乳液聚合反应有效地提高了纳米复合乳液传统制备方法的效率,在可见光LED光源辐照下,仅需30min即可高效制备纳米级复合乳液。
This work combined visible-light curing technology with emulsion polymerization technology for the preparation of composite emulsions with nano-scale.OMMT/Polymethyl methacrylate nanocomposite emulsions were successfully prepared by using methyl methacrylate as a monomer and a two-component photoinitiating system consisting of fluorescent brightener and diphenyl iodonium hexafluorophosphate upon exposure to visible-light LED@430 nm.The results revealed that OMMT modified by the higher concentration of CTAB promoted the conversion of monomer under the same conditions.More importantly,this visible-light induced emulsion polymerization effectively improved the efficiency of the traditional preparation method of nano-composite emulsion.Under the irradiation of visible-light LED,the composite emulsions with nano-scale was efficiently prepared in only 30min.
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基金资助
贵州省高层次留学人才创新创业项目([2020]11);贵州省科学技术基金([2020]1Y209);贵州民族大学自然科学基金(GZMU[2019]YB23)
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