大学化学 >> 2022, Vol. 37 >> Issue (5): 2110031.doi: 10.3866/PKU.DXHX202110031

所属专题： 第2届全国大学生化学实验创新设计竞赛

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细乳液聚合制备光致变色胶体粒子及其防伪应用

林众1, 邓海涛1, 陆健航1, 张培盛1,2,*(), 李国斌1, 周智华1, 陈建1,2,*()   

  1. 1 湖南科技大学化学化工学院, 湖南 湘潭 411100
    2 湖南科技大学理论有机化学与功能分子教育部重点实验室, 湖南 湘潭 411100
  • 收稿日期:2021-10-12 录用日期:2021-11-04 发布日期:2022-03-23
  • 通讯作者: 张培盛,陈建 E-mail:pszhang07@gmail.com;cj0066@gmail.com
  • 作者简介:Email: cj0066@gmail.com (陈建)
    Email: pszhang07@gmail.com (张培盛)
  • 基金资助:
    国家自然科学基金面上项目(5177306);国家自然科学基金面上项目(52173278);湖南省杰出青年科学基金(2021JJ10029);湖南省优秀青年基金项目(2020JJ3021);化工与材料国家级实验教学示范中心项目(教高厅函2016[7]);“应用化学”湖南省“十三五”综合改革试点专业项目(湘教通2016[276]号)

Preparation of Photochromic Colloidal Particles by Miniemulsion Polymerization and Investigation of Its Anti-Counterfeiting Applications

Zhong Lin1, Haitao Deng1, Jianhang Lu1, Peisheng Zhang1,2,*(), Guobin Li1, Zhihua Zhou1, Jian Chen1,2,*()   

  1. 1 School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411100, Hunan Province, China
    2 Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan University of Science and Technology, Xiangtan 411100, Hunan Province, China
  • Received:2021-10-12 Accepted:2021-11-04 Published:2022-03-23
  • Contact: Peisheng Zhang,Jian Chen E-mail:pszhang07@gmail.com;cj0066@gmail.com

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摘要：

细乳液聚合技术具有操作简便、绿色经济、适用范围广等优点，可以很好地应用于本科生新创性实验教学中；同时，通过在细乳液聚合中引入具有光致变色特性的螺吡喃衍生物，使制备的胶体粒子具有明显的光致变色和荧光开关特性，还可以进一步激发学生的实验兴趣和对科研的亲近感。本文通过一步细乳液聚合法，在75 ℃下聚合反应3 h制备了含螺吡喃衍生物——2-(3’, 3’-二甲基-6-硝基螺[苯并吡喃-2, 2’-吲哚啉]-1’-基)乙基-甲基丙烯酸酯(SPMA)的光致变色胶体粒子，利用激光粒度分析仪、紫外-可见吸收光谱仪和荧光光谱仪对胶体粒子进行粒径和光谱测试。结果表明，所制备的胶体粒子的粒径在60 nm左右，它在紫外光和可见光刺激下表现出明显的光致变色和荧光开关性质。初步的防伪应用表明其在荧光防伪上具有很大的应用价值。

关键词: 细乳液聚合, 光致变色, 胶体粒子, 螺吡喃, 防伪

Abstract:

Miniemulsion polymerization technology has several advantages, including simple operation, use of green technology, and a wide range of applications, and can be used for innovative experimental teaching for undergraduates. By introducing spiropyran derivatives with photochromic properties into the miniemulsion polymerization, the prepared colloidal particles have apparent photochromic and photoswitchable fluorescent properties, which may further stimulate students' interest in experiments and foster a sense of closeness to scientific research. In this paper, a one-step miniemulsion polymerization method was used to prepare photochromic colloidal particles containing spiropyran derivatives, that's 2-(3', 3'-dimethyl-6-nitrospiro[chromene-2, 2'-indolin]-1'-yl)ethyl methacrylate (SPMA), at 75 ℃ for 3 h. The particle size and spectra of the colloidal particles were measured using a laser particle size analyzer, UV-Vis absorption spectrometer, and fluorescence spectrometer. The results show that the particle size of the prepared colloidal particles is approximately 60 nm, and they exhibit obvious photochromic and photoswitchable fluorescent properties under ultraviolet and visible light. Preliminary studies show they have valuable fluorescent anti-counterfeiting applications.

Key words: Miniemulsion polymerization, Photochromic, Colloidal particles, Spiropyran, Anti-counterfeiting