群青粒子的微胶囊化机理及其表面分维  

Mechanism of Microencapsulation of Ultramarine Particle and Surface Fractal Dimensionality

作　　者：杨桂琴[1] 严乐美[1] 张万东[1] 崔建中[1] 郭从容[1] 王雪松[1] 

机构地区：[1]天津大学化学系

出　　处：《化学工业与工程》1997年第1期20-24,共5页Chemical Industry and Engineering

基　　金：国家自然科学基金

摘　　要：本文研究了油包水（Ｗ／Ｏ）乳液中群青粒子微胶囊化的机理，并探讨了粒子表面分形维数与其表面形貌的关系。结果表明，在Ｗ／Ｏ乳液中群青粒子进入乳液的液珠内形成“微型反应器”，使微胶囊化反应在液珠内的群青粒子表面进行，形成硅胶囊膜，有效地提高了群青的耐酸性；粒子的表面分维可量化表征粒子的表面形貌。In this paper,microencapsulation mechanism of ultramarine particles in W/O emulsion was investigated.We made an approach to the relationship between surface fractal dimensionality(D) and surface shape of particles.The results show:In W/O emulsion, ultramarine particles get into aqueous beads of emulsion , forming “microreactor”. The reaction of microencapsulation takes place on the surface of particles in beads of W/O emulsion, which forms membrane of silicagel capsule,and the acid-resistance of ultramarine can be effectively improved. Shape of particle surface can be quantitatively characterized by surface fractal dimensionality.Value D may be used for explaining acid-reistance of ultramarine.

关 键 词：群青 微胶囊化 分形 油包水乳液 无机颜料 颜料 

分 类 号：TQ622.23[化学工程—精细化工]