温致变色材料微胶囊化研究

Microencapsulation of Thermochromic Materials

1.
Testing Centre, China University of Geosciences, Wuhan 430074, China
2.
College of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China

摘要: 温致变色材料的应用通常受强酸性、强碱性及环境杂质污染等因素的影响, 以酸碱指示剂和pH值变化的熔化性化合物为变色心材的微胶囊化实验条件, 探讨了微胶囊化机理.这类变色材料的微胶囊化技术将促进其应用研究.
- 温致变色材料 /
- 微胶囊 /
- 囊心 /
- 囊壁
Abstract: The application of thermochromic materials is commonly restricted by surroundings, strong acid, strong base, impurity stain and other factors. The processing conditions of microencapsulation using thermochromic materials as the core were investigated. The thermochromic materials are composed of indicator and the compounds which change pH when heated. Also, the formation mechanism is discussed. The microencapsulation will promote the application of thermochromic materials.
- thermochromic material /
- microcapsule /
- core /
- shell

图 1 微胶囊结构扫描电镜(放大3 000倍)

Fig. 1. SEM image of microcapsule structure

下载: 全尺寸图片幻灯片

图 2 微胶囊结构扫描电镜(放大5000倍)

Fig. 2. SEM image of microcapsule structure

下载: 全尺寸图片幻灯片

表 1 乳化时间对平均粒径的影响

Table 1. Effect of emulsification time on average particle size of microcapsule

表 2 甲醛用量对微胶囊结构的影响

Table 2. Effect of various amount of methanal solution on structure of microcapsule

表 3 不同壁材对心材的影响

Table 3. Effect of different shell materials on core materials

表 4 温致变色的测定

Table 4. Determination of thermochromism

[1]	张河哲, 王玉洁, 白光月. 共缩聚酰胺胶囊的制备及其性质的研究[J]. 物理化学学报, 1993,(1): 85-88. Zhang HZ, Wang Y J, Bai G Y. Preparation and properties of co-polymerization polyamine capsules[ J]. Acta Physico-Chimica Sinica, 1993, (1): 85-88.
[2]	王庆禄, 赵贵文. 热变色材料[ J]. 化学世界, 1994, (4): 169-175. Wang Q L, Zhao G W. Thermochromism materials[ J]. Chemical World, 1994, (4): 169-175.
[3]	华中一, 陈国荣. 用于脉音激光唱片的光敏变色薄膜[J]. 复旦学报, 1992, (2): 233-238. Hau Z Y, Chen G R. A photochromatic film for recordable compact discs[ J]. Journal of Fudan University, 1992, (2): 233-238.
[4]	王玉洁, 白光月, 张河哲. 含P204聚酰胺胶囊功能性研究[J]. 物理化学学报, 1993, (6): 832-835. Wang Y J, Bai G Y, Zhang HZ. Study of the function of polamine capsule soaked in P204[J]. Acta Physico-Chimica Sinica, 1993, (6): 832-835.
[5]	Nixon J R. Microencapsulation[ M]. New York: Marcel Dekker Inc, 1976.
[6]	Hoshino H, Matsushita S, Samura H. Reversible writeerase properties of Cu-TCNQ optical recording media[ J]. Jpn Appl Phys, 1986, 25(4): 341-342.