Page 69 - 《精细化工》2020年第5期
P. 69
第 37 卷第 5 期 精 细 化 工 Vol.37, No.5
202 0 年 5 月 FINE CHEMICALS May 2020
功能材料
溶剂挥发法制备高密封性光致变色微胶囊
*
王腾飞,殷允杰 ,王潮霞
(江南大学 纺织服装学院 生态纺织教育部重点实验室,江苏 无锡 214122)
摘要:通过溶剂挥发法制备了以聚甲基丙烯酸甲酯为壳材、N-羟乙基-3,3-二甲基-6-硝基吲哚啉螺吡喃为芯材的
光致变色微胶囊。采用 FTIR、SEM、粒径分析仪、分光光度计、测色配色仪对微胶囊的微观形貌、粒径和颜色
等进行了表征。结果表明,芯壁质量比(芯/壁)对微胶囊的形貌和性能有显著影响,当芯壁质量比为 2∶1 时,
微胶囊具有良好的颜色性能,变色前后色差为 ΔE CMC 大于 20,并且包覆严密、表面光滑。当芯壁质量比大于 2∶
1 后,微胶囊不能很好地包覆。光致变色微胶囊在紫外光照射下会立即变色,完全变色时间为 16 s,其在紫外
光-可见光照射 30 个循环后,仍具有优异的光致变色灵敏性。
关键词:微胶囊;聚甲基丙烯酸甲酯;光致变色响应;螺吡喃;功能材料
中图分类号:TB34 文献标识码:A 文章编号:1003-5214 (2020) 05-0919-07
Preparation of high sealing photochromic microcapsules via
solvent evaporation method
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WANG Tengfei, YIN Yunjie , WANG Chaoxia
(Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, College of Textiles and Clothing,
Jiangnan University, Wuxi 214122, Jiangsu, China)
Abstract: Photochromic microcapsules with polymethyl methacrylate as shell material and 3′,3′-dimethyl-
6-nitro-spiro[2H-1-benzopyran-2,2′-indoline]-1′-ethanol as core material were prepared by solvent
evaporation method. FTIR, SEM, particle size analyzer, spectrophotometer and colorimeter were used to
characterize the microstructure, particle size, and color of the microcapsules. The results showed that the
core-shell mass ratio had a significant effect on the morphology and performance of the microcapsules.
When the core-shell mass ratio was 2∶1, the microcapsules had good color performances, and the color
difference before and after color change (ΔE CMC) was greater than 20, and the microcapsules possessed
strict and smooth surface. While the core-shell mass ratio was larger than 2∶1, the microcapsules were not
formed well. The as-prepared microcapsules immediately change color when exposed to ultraviolet light,
and the complete discoloration time was 16 s. After 30 cycles of UV-Vis light irradiation, the microcapsules
still exhibited excellent photochromic sensitivity.
Key words: microcapsules; polymethyl methacrylate; photochromic response; spiropyran; functional
materials
光致变色材料是具有不同吸收光谱的化学物质 致变色材料容易受到环境的影响,有的还需要借助
[1]
在两种形式之间可逆光转化 ,主要包括偶氮苯、 溶剂来显色,这限制了它的应用范围。光致变色聚
[2]
二芳基乙烯、螺吡喃等 。其在光响应的太阳镜和 合物粒子相对于小分子荧光团具有良好的光稳定性
[5]
[4]
[3]
荧光纳米探针 等方面已经得到广泛应用。但是光 和亮度,在智能服装、防伪 、光信息存储 、光调
收稿日期:2019-11-21; 定用日期:2020-02-11; DOI: 10.13550/j.jxhg.20191097
基金项目:国家自然科学基金(21975107);中央高校基本科研业务费专项资金资助(JUSRP51724B);江苏省自然科学基金
(SBK2019020945)
作者简介:王腾飞(1994—),男,硕士生,E-mail:384737003@qq.com。联系人:殷允杰(1983—),男,副教授,E-mail:
yinyunjie@jiangnan.edu.cn。