纺织学报 ›› 2022, Vol. 43 ›› Issue (02): 10-18.doi: 10.13475/j.fzxb.20210701509
王锐1,2,3, 刘彦麟1, 刘蕴钰1, 顾伟文1, 刘紫灵1, 魏建斐1,2,3()
WANG Rui1,2,3, LIU Yanlin1, LIU Yunyu1, GU Weiwen1, LIU Ziling1, WEI Jianfei1,2,3()
摘要:
针对纺织废弃物的急剧增加以及随之带来的环境污染和石油资源枯竭问题,以聚对苯二甲酸乙二醇酯(PET)和磷酸氢二铵为原料,采用热解法制备了性能优异的磷氮元素掺杂PET基碳点。探究了PET基碳点的最优制备工艺及其形貌结构、化学结构和荧光性能等,探索了其在荧光防伪等方面的应用。得到最优制备工艺为:PET低聚物质量为5 g,磷酸氢二铵质量为2 g,反应温度为260 ℃,反应时间为18 h。该条件下制备的PET基碳点具有典型的激发波长依赖性,其最佳激发光波长为320 nm,最佳发射光波长为390 nm,荧光量子产率可达18.26%,平均荧光寿命为6.96 ns;PET基碳点具有稳定的水溶性和优良的抗干扰性,用其制成的荧光墨水、荧光粉与荧光琼脂在365 nm紫外光照射下均呈现出明亮的蓝色荧光。该PET基碳点在数据加密、防伪、成像、LED器件等方面存在巨大应用潜力,为废弃PET的高值回收利用提供了新的可能。
中图分类号:
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