微胶囊防晒剂的研制  

Preparation of microcapsule sun-screening agent

作　　者：刘剑萍[1] 黄永秋[2] 徐昌曦[2] 刘应应[3] 

机构地区：[1]东华大学化学化工学院,上海200051 [2]东华大学材料科学与工程学院,上海200051 [3]浙江省经济贸易委员会,杭州310012

出　　处：《化工新型材料》2004年第7期46-48,共3页New Chemical Materials

摘　　要：以乳液状纳米级的TiO2 为芯材 ,采用明胶和壳聚糖作为壁材 ,通过复凝聚反应制备了包裹TiO2 的微胶囊。考察了种子浓度、pH值和心壁比等工艺条件对微胶囊产率和形态的影响。采用电子显微镜观测微胶囊的外观和粒径 ,结果表明 ,微胶囊的大小为几百纳米。同时 ,还考察了微胶囊对 2 80～ 5 5 0nm的光的吸收效果 ,结果显示 ,TiO2Using TiO 2 emulsion as core materials, glutin and chitosan as shell materials, TiO 2 impregnated microcapsule was prepared via complex coacervation procedure. The impacts of seed concentration, pH value and core/shell ratio for the productive rate and morphology of the microcapsule were discussed. The SEM photos show the diameter of the microcapsule is about 300～500nm under the favorable conditions. The absorbance of this microcapsule for UV-light was investigated to determine its sun-screening ability, and the results show that it has powerful absorbance for the dangerous UVB.

关 键 词：明胶 壳聚糖 复凝聚反应 制备 微胶囊 防晒剂 纳米超微Ti02 氧化铊 氨基苯甲酸 水杨酸 氧化锌 

分 类 号：TQ658[化学工程—精细化工]