以聚对苯二甲酸乙二醇酯为前驱体的碳点制备及其应用

doi:10.13475/j.fzxb.20210701509

纺织学报 ›› 2022, Vol. 43 ›› Issue (02): 10-18.doi: 10.13475/j.fzxb.20210701509

以聚对苯二甲酸乙二醇酯为前驱体的碳点制备及其应用

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()

1.北京服装学院材料设计与工程学院, 北京 100029
2.北京服装学院服装材料研究开发与评价北京市重点实验室, 北京 100029
3.北京市纺织纳米纤维工程技术研究中心, 北京 100029

收稿日期:2021-07-05 修回日期:2021-11-26 出版日期:2022-02-15 发布日期:2022-03-15
通讯作者: 魏建斐
作者简介:王锐(1963—),女,教授,博士。主要研究方向为高分子材料的高性能化与功能化。
基金资助:
北京市教育委员会科技计划一般项目(KM202110012007);北京市自然科学基金面上项目(2222054);北京学者项目(RCQJ20303)

Preparation and application of carbon dots with polyethylene terephthalate as precursor

WANG Rui¹^,²^,³, LIU Yanlin¹, LIU Yunyu¹, GU Weiwen¹, LIU Ziling¹, WEI Jianfei¹^,²^,³()

1. School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
2. BeijingKey Laboratory of Clothing Materials R&D and Assessment, Beijing Institute of Fashion Technology, Beijing 100029, China
3. Beijing Engineering Research Center of Textile Nano Fiber, Beijing 100029, China

Received:2021-07-05 Revised:2021-11-26 Published:2022-02-15 Online:2022-03-15
Contact: WEI Jianfei

摘要/Abstract

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。

关键词: 聚对苯二甲酸乙二醇酯, 碳点, 荧光墨水, 热解法, 纺织废弃物高值利用

Abstract:

In response to the rapid increase in textile waste and the consequent environmental pollution and depletion of petroleum resources, using waste polyethylene terephthalate (PET) and ammonium dihydrogen phosphate as raw materials, phosphorus nitrogen doped PET based carbon dots were prepared by pyrolysis method. The optimal preparation process of PET based carbon dots and their morphology, chemical structure and fluorescent properties were studied, and their applications in fluorescent anti-counterfeiting were explored. The results showed that at the optimal conditions of the mass of PET oligomer of 5 g, the ammonium dihydrogen phosphate mass of 2 g, the reaction temperature of 260 ℃, and the reaction time of 18 h, the PET based carbon dots have a typical excitation wavelength dependence. The optimal excitation and emission wavelength is 320 nm and 390 nm respectively, and the fluorescence quantum yield can reach 18.26%. The average fluorescence lifetime is 6.96 ns. PET based carbon dots is stable in water solubility and excellent in anti-interference. The fluorescent inks, phosphors and fluorescent agar made from them all exhibit bright blue fluorescence under 365 nm ultraviolet light irradiation. The PET based carbon dots have huge application potential in data encryption, anti-counterfeiting, imaging, LED devices, and more, providing new possibilities for the high-value recycling of waste PET.

Key words: polyethylene terephthalate, carbon dots, fluorescent ink, pyrolysis method, high value utilization of textile waste

中图分类号:

TS151

王锐, 刘彦麟, 刘蕴钰, 顾伟文, 刘紫灵, 魏建斐. 以聚对苯二甲酸乙二醇酯为前驱体的碳点制备及其应用[J]. 纺织学报, 2022, 43(02): 10-18.

WANG Rui, LIU Yanlin, LIU Yunyu, GU Weiwen, LIU Ziling, WEI Jianfei. Preparation and application of carbon dots with polyethylene terephthalate as precursor[J]. Journal of Textile Research, 2022, 43(02): 10-18.

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以聚对苯二甲酸乙二醇酯为前驱体的碳点制备及其应用

Preparation and application of carbon dots with polyethylene terephthalate as precursor

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