Page 28 - 201810

第 35 卷第 10 期 精 细 化 工 Vol.35, No.10
2018 年 10 月 FINE CHEMICALS Oct. 2018

功能材料
乳化-化学交联法光致变色微胶囊的制备及其性能

*
张妍妍，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：以螺吡喃光致变色染料为芯材、壳聚糖为壁材，采用乳化-化学交联法制备了粒径分布窄、平均粒径较小
的光致变色壳聚糖微胶囊。考察了乳化剂种类、超声时间、芯壁质量比对微胶囊粒径的影响，测试了光致变色
壳聚糖微胶囊的热稳定性及光致变色响应性能。结果表明：当乳化剂为质量分数 5%的 Tween80 水溶液、超声
时间 120 min、芯壁质量比为 1∶3 时，制得的微胶囊粒径分布范围窄，平均粒径 3.2 μm，密封性良好，能耐受
300 ℃左右的高温；光致变色微胶囊分散液达到变色稳态、褪色稳态的时间分别为 4.25、26.00 s，较未胶囊化
的光致变色染料分散液分别提高了 0.25、4.00 s，具有良好的光致变色灵敏性。
关键词：光致变色微胶囊；壳聚糖；乳化-化学交联法；热稳定；光致变色响应；功能材料
中图分类号：TB 34 文献标识码：A 文章编号：1003-5214 (2018) 10-1636-05

Preparation and Properties of Photochromic Microcapsule via

Emulsification-Chemical Cross-linking Method

*
ZHANG Yan-yan, YIN Yun-jie , WANG Chao-xia
（Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, College of Textiles and Clothing, Jiangnan
University, Wuxi 214122, Jiangsu, China）

Abstract: A kind of photochromic microcapsule with a narrow particle size distribution and smaller
average particle size was prepared by emulsification-chemical cross-linking method with spiropyran
photochromic dye as core material and chitosan as shell material. The effects of emulsifier type, ultrasonic
time and core/shell mass ratio on the particle size of microcapsule were investigated. The thermal stability
and photochromic properties of photochromic chitosan microcapsule were tested. The results showed that
the best emulsifier was Tween80 aqueous solution (mass fraction 5%). Ultrasonic time was 120 min and
core/shell mass ratio was 1∶3. Under these conditions, the microcapsule exhibited a narrow particle size
distribution and an average particle size of 3.2 μm. Moreover, the prepared microcapsule had good
leakproofness and was able to withstand the high temperature about 300 ℃. The time of photochromic
microcapsule dispersion liquid needed to achieve the steady state during coloration process and the time of
photochromic microcapsule dispersion liquid lost the steady state during decoloration process were 4.25 s
and 26.00 s, which were 0.25 s and 4.00 s higher than that of the photochromic dye dispersion liquid,
respectively. The results indicated that the photochromic microcapsule had good photochromic reversibility.
Key words: photochromic microcapsule; chitosan; emulsification-chemical cross-linking method; thermal
stability; photochromic response; functional materials
Foundation items: National Natural Science Foundation of China (51403083); Fundamental Research
Funds for the Central Universities (JUSRP51724B)

光致变色染料是目前研究极为活跃的新型染 其耐疲劳性降低、耐光稳定性差、形成不可逆分解
料，但易受外界环境因素和化学助剂的影响，造成 产物而失去变色效果等缺点，这导致其应用受到了

收稿日期：2017-06-13; 定用日期：2018-01-12; DOI: 10.13550/j.jxhg.20170488
基金项目：国家自然科学基金（51403083）；中央高校基本科研业务费专项资金资助（JUSRP51724B）
作者简介：张妍妍（1992—），女，硕士生。联系人：殷允杰（1983—），男，副教授，硕士生导师，E-mail：yinyunjie@jiangnan.edu.cn。