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第 35 卷第 11 期 精 细 化 工 Vol.35, No.11
2018 年 11 月 FINE CHEMICALS Nov. 2018

造纸化学品
香豆素修饰的碳量子点光稳定剂的制备与性能

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郭明媛，张光华 ，王子儒
（陕西科技大学 化学与化工学院 教育部轻化工助剂化学与技术重点实验室，陕西 西安 710021）

摘要：以柠檬酸为碳源，通过水热反应制备碳量子点，再采用 1-乙基-3-(3-二甲氨基丙基)碳二亚胺盐酸盐/N-
羟基琥珀酰亚胺（EDC/NHS）酰胺反应催化体系，将 7-氨基-4-甲基香豆素（AMC）修饰至碳量子点上，合成
出一种香豆素修饰的碳量子点光稳定剂（AMC-CQDs）。考察了其光学性能和纸张表面应用性能，运用 1931-CIE
色度坐标，初步探究了纸张返黄过程中色度变化规律。结果表明：合成的 AMC-CQDs 粒径均匀，平均粒径为
4.13 nm，具有良好的水溶性和紫外吸收性能，基本实现紫外区的全覆盖吸收，其最大荧光发射波长为 431 nm，
荧光量子产率达到 38.7%，适用于高得率浆纸张增白；当涂布淀粉糊化液中 AMC-CQDs 含量为 0.6%（以糊化
液的质量为基准，下同）时，可将纸张的初始白度提高 4.71% ISO；色度坐标显示，该碳量子点光稳定剂对于
色度坐标位于 y=1.553x0.184 附近的纸张具有良好的光物理增白效果。
关键词：高得率浆；光稳定剂；碳量子点；香豆素；荧光增白；造纸化学品
中图分类号：O482.31；TQ610.491 文献标识码：A 文章编号：1003-5214 (2018) 11-1948-09

Preparation and Properties of Coumarin-Modified Carbon
Quantum Dots as Light Stabilizer

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GUO Ming-yuan, ZHANG Guang-hua , WANG Zi-ru
（Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, College of
Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China）

Abstract: Carbon quantum dots (CQDs) were successfully prepared by a hydrothermal reaction using citric
acid as the carbon source, and then modified with 7-amino-4-methyl coumarin (AMC) in a catalyst system
containing 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-Hydroxysuccinimide
(EDC/NHS), which produced a coumarin-modified carbon light stabilizer (AMC-CQDs). The optical
properties of AMC-CQDs and its application properties on the surface of paper were studied. And the law
of change on chromaticity of the paper was analyzed by 1931-CIE chromaticity coordinates. The results
revealed that the synthesized AMC-CQDs had a uniform particle size distribution of 4.13 nm, and exhibited
good water solubility and UV absorption, which could realize a full coverage absorption in UV light area.
The maximum fluorescence emission wavelength of AMC-CQDs was 431 nm, and the fluorescence
quantum yield reached 38.7%. The initial whiteness of the paper was increased by 4.71%ISO when the
dosage of AMC-CQDs was 0.6%(based on the mass of coating starch gelatinizing solution, as the below)
in coating starch gelatinizing solution, indicating that AMC-CQDs was suitable for high yield pulp paper
whitening. In addition, the results of chromaticity coordinates showed that the carbon light stabilizer had a
good light physical whitening effect for the paper with chromaticity coordinates in the vicinity of the line
y=1.553x0.184.
Key words: high yield pulp; light stabilizer; carbon quantum dots; coumarin; fluorescent brightening;
papermaking chemicals
Foundation item: National Natural Science Foundation of China (31670596)

收稿日期：2017-09-29; 定用日期：2018-02-12; DOI: 10.13550/j.jxhg.20170788
基金项目：国家自然科学基金（31670596）
作者简介：郭明媛（1989—），女，博士生。联系人：张光华（1962—），男，教授，E-mail：zhanggh@sust.edu.cn。