将绿光碳纳米点（ｇ⁃ＣＤｓ）水溶液与聚丙烯酸钠（ＰＡＡＳ）复合， 制备了具有高荧光量子效率的（ｇ⁃ＣＤｓ＠ ＰＡＡＳ）复合材料． ＰＡＡＳ 因具有大量羧基基团而具有强吸水性， 能与 ｇ⁃ＣＤｓ 表面大量的羧基、 羟基及氨基基 团产生氢键作用， 使 ｇ⁃ＣＤｓ 在复合材料中维持单分散状态， 有效地克服了 ｇ⁃ＣＤｓ 在固态下因聚集而引发的荧 光猝灭问题． 这种复合方法操作简单， 制备过程中原材料无损失， ｇ⁃ＣＤｓ 负载量高达 ３０％的发光复合材料的 荧光量子效率为 ５２％． 此外， ｇ⁃ＣＤｓ＠ ＰＡＡＳ 复合材料具有良好的热稳定性、 光稳定性和耐有机溶剂等特点， 可作为颜色转换层应用于白光发光二极管．

Luminescent materials have wide application prospects in many fields, and hence they have drawn increasing attention. In this work, carbon dots(g-CDs) and polyacrylate sodium(PAAS) were used as raw materials. By combining g-CDs aqueous solution with PAAS, a luminescent composites(g-CDs@PAAS) was obtained. Because the PAAS has a large number of carboxyl group and strong water imbibition thereof, while there are lots of carboxyl, hydroxyl and amino groups on g-CDs surface, leading to the combination of PAAS with g-CDs through hydrogen bonding interaction. In the as-prepared composites, g-CDs maintain monodisperse, which effectively overcomes the aggregation-induced solid-state luminescence quenching of g-CDs. This synthetic method is simple to operate and has no loss of raw materials during the preparation. The loading g-CDs fraction in g-CDs@PAAS is up to 30%, and its photoluminescence quantum yields could achieve 52%. In addition, the g-CDs@PAAS composites have good thermal stability, photostability, and organic solvent resistance. These advantages ensure that g-CDs@PAAS composites can be used as the color conversion layer in the manufacturing of white light-emitting diode.