摘要：本实验以相变材料硬脂酸为芯材，无机材料碳酸钙为壁材，十二烷基硫酸钠为乳化剂，在70℃下采用原位聚合法制备硬脂酸/碳酸钙无机相变微胶囊。运用单因素实验探究芯壁比、乳化剂用量、加料方式对于微胶囊包埋率的影响。并用扫描电子显微镜、傅里叶红外光谱、差示扫描量热仪、热重分析等仪器对制备的微胶囊的形态特征、结构、热稳定性等物理特性进行分析与表征。从而得出最优工艺条件：芯壁比为12:4；乳化剂十二烷基硫酸钠（SDS）的加入量为芯材加入量的1%；滴加碳酸钠的方式采用水下注入。此时微胶囊包埋率为83.01%，微胶囊呈球状，表面光滑，致密性良好，分散状况良好，粒径小于1μm。50495
毕业论文关键字： 微胶囊；碳酸钙；相变材料；硬脂酸；原位聚合法
Preparation of inorganic MicroPCMs for calcium carbonate
Abstract：In this experiment, the stearic acid / calcium carbonate inorganic phase change microcapsules were prepared by in-situ polymerization method with phase change material stearic acid as core material, calcium carbonate as wall material and twelve sodium alkyl sulfate as emulsifier. Using single factor experiment to explore the effect of core wall ratio, emulsifier dosage and the way of adding reagents on the encapsulation efficiency of microcapsules. The morphology, structure and thermal stability of the microcapsules were characterized by scanning electron microscopy, infrared spectroscopy, differential scanning calorimetry, and thermogravimetric analysis.Then we got the optimal process conditions:the core wall ratio is 12:4;the addition amount of emulsifier twelve sodium sulfate (SDS) was 1% of the core material;the way of adding reagents was adding Na2CO3 under the water.
Key Words: microcapsule;calcium carbonate; phase change material(PCM);stearic acid;In-situ polymerization
目 录
1 微胶囊的概述 4
1.1 微胶囊定义 4
1.2 微胶囊技术 4
1.3 微胶囊种类 4
1.4 相变微胶囊的组成 5
1.4.1 芯材 5
1.4.2 壁材 6
1.5 相变微胶囊的制备方法 7
1.5.1 原位聚合法 7
1.5.2 悬浮聚合法 8
1.5.3 界面聚合法 8
1.5.4 复合凝聚法 8
1.6.1 国内研究现状 8
1.6.2 国外研究现状 10
1.7 本课题的研究目的和意义 10
2 实验药品及仪器 11
2.1 实验药品 11
2.2实验仪器 11
2.3实验原理及步骤 11
3 测试结果及表征实验 12
3.1 包埋率 12
3.1.1 芯璧比对微胶囊包埋率的影响 13
3.1.2 乳化剂用量对微胶囊包埋率的影响 14
3.1.3 加料方式对微胶囊包埋率的影响 15
3.2 表征实验 15
3.2.1 生物显微镜观察微胶囊形态 碳酸钙无机相变微胶囊的制备:http://www.751com.cn/huaxue/lunwen_53847.html