摘要：本课题以液体石蜡为芯材，聚苯乙烯为壁材，利用悬浮聚合法制备了聚苯乙烯相变微胶囊。采用红外光谱和热重分析的测试技术对所制备的相变微胶囊的结构组成及热性能进行了分析与表征。本文讨论了芯壁比、反应温度、预聚时间、反应时间等因素对微胶囊产量、包埋率及包埋效率的影响。综合实验结果表明，在85℃、芯壁比为1:1的条件下，预聚时间为150min，反应时间6h时，所制备得到的微胶囊最高包埋率为50.42%，包埋效率为83.40%。通过热重分析仪(TG)表征微胶囊，得出结论微胶囊在170℃以下具有良好的热稳定性能，并且包埋率最高，包埋效率最大。38714
毕业论文关键词： 微胶囊；聚苯乙烯；相变材料
Preparation and characterization of paraffin phase change microcapsule in polystyrene
Abstract: A phase change microcapsule was prepared by suspension polymerization method using paraffin wax, polystyrene as the core material and shell material, respectively.The distribution shell structure and the thermal properties of the microcapsule were investigated by FT-IR and TG.This paper discusses the emulsion of liquid paraffin, reaction temperature and reaction time effect of the production of microcapsules, the embedding rate, embedding efficiency.Experimental results show that the microcapsules uniform particle size, good thermal stability, embedding and embedding efficiency is relatively high rate, the reaction conditions are as follows, , the ratio of core material and wall material is 1:1, The temperature of reaction was 85 ℃, the time of reaction was 6 hours. By the data statistics analysis results that the maximum characterize embedded microcapsules was 50.42%,efficiency of embedding was 83.40%. Obtained by thermal gravimetric analyzer microcapsules have good thermal stability below 170 ℃,the embedding rate is highest, the embedding efficiency is the largest.
Key Words：microcapsule; phase change material; polystyrene
目 录
摘要 i
Abstract ii
目录 iii
1 绪论 1
1.1 相变材料 1
1.1.1 相变材料概述 1
1.1.2 相变材料分类 1
1.1.3 相变材料的研究现状 2
1.2 微胶囊技术及其发展 2
1.2.1 微胶囊技术的概述 2
1.3 微胶囊相变材料(MCPCM) 3
1.3.1 微胶囊相变材料定义及其分类 3
1.3.2 微胶囊相变材料的特性 4
1.3.3 微胶囊相变材料制备方法 4
1.4 苯乙烯和聚苯乙烯 5
1.4.1 苯乙烯 5
1.4.2 聚苯乙烯 6
1.5 本课题的内容及意义 6
2 分析 7
2.1 实验原理 7
2.2 实验原料及仪器 7
2.2.1 实验原料 7
2.2.2 实验仪器 7
3 设计 8
3.1 实验准备 8
3.1.1 AIBN的纯化 8
3.1.2 苯乙烯去阻聚剂 8
3.2 实验方法 8
3.3 实验内容 9
3.3.1 芯壁比对微胶囊制备的影响 9
3.3.2 反应温度对微胶囊制备的影响 10
3.3.3 反应预聚时间对微胶囊制备的影响 11
3.3.4 反应时间对微胶囊制备的影响 11
3.4 微胶囊的测试及表征 12
3.4.1 Fourier红外光谱仪 12 聚苯乙烯相变微胶囊的制备与分析:http://www.youerw.com/huaxue/lunwen_37752.html