摘要：以密胺树脂为壁材，十二醇为芯材，利用原位聚合法制备了相变微胶囊。并采用电子显微镜、红外光谱、热重分析等测试技术对所制备的相变微胶囊的形貌特征、粒径大小、结构组成及热性能进行了分析与表征。讨论了体系浓度、芯壁比、搅拌速度等因素对微胶囊粒径及包埋率的影响。结果表明，密胺树脂对十二醇成功包埋，得到球形相变微胶囊。当乳化剂使用SMA和SDBS复配，乳化剂用量在5%，转速2000R/min之后包埋率最高；而随系统浓度的增大，微胶囊粒径呈现增大趋势，但包埋率不断减小；芯壁比对微胶囊粒径大小及分布影响很小，但综合考虑微胶囊的包埋率与芯材的利用率，芯壁比为2: 1时为最佳选择；微胶囊粒径随转速的增大而减小，但微胶囊的包埋率与芯材的利用率皆呈现先下降后上升趋势。经热重表征微胶囊最佳包埋率为62.27%.20115
毕业论文关键字：微胶囊；相变材料；十二醇；原位聚合法
Preparation of lauryl alcohol phase change microcapsule in melamine–formaldehyde resins
Abstract: Use melamine–formaldehyde resin as wall material, lauryl alcohol as the core material, the use of in situ polymerization of the organic phase change microcapsules. The use of biological microscopes, infrared spectroscopy, thermal analysis techniques such as testing phase transition prepared microcapsules morphology, particle size, composition and thermal performance analysis and characterization. Discusses the system concentration, the core wall ratio, stirring speed and other factors on microcapsule size and embedding rate. The results show that the success of melamine–formaldehyde resin lauryl alcohol embedded, to obtain spherical organic phase change microcapsules. When used by SMA and SDBS, emulsification in when embedding 2000r/min highest rate; while increasing concentration with the system, microcapsule particle size showed increasing trend, but the rate has been reduced embedding small; core microcapsule wall compared to the particle size and its distribution effect is small, but considering the microcapsule embedded core material utilization rate and the core wall ratio of 2: 1 is the best choice; microcapsule size with the speed decreases, but the embedded microcapsules utilization rate and the core material are first decreased and then increased. Characterized by the gravimetric best embedded microcapsules was 62.27%; 150℃g less microcapsules with good thermal stability.
Key Words: microcapsule; phase change material; lauryl alcohol;In situ polymerization
 目录
摘要 i
Abstract i
目录ii       
1 绪论    1
1.1 微胶囊及相变微胶囊概述    1
1.1.1 微胶囊概述    1
1.1.2 相变材料概述    1
1.1.3 微胶囊相变材料概述    1
1.1.4 微胶囊壁材选择    2
1.1.5 微胶囊制备方法    2
1.2 相变材料    2
1.2.1 相变材料概念    2
1.2.2 相变材料分类    3
1.2.3 相变材料的研究现状    3
1.2.4 相变材料微胶囊制备方法    3
1.3 微胶囊的改性    5
1.4 本课题的内容及意义    5
2 实验原理和方法    7
2.1 实验原料及仪器    7
2.1.1 实验原料    7
2.1.2 实验仪器    7
2.2 实验原理    7
2.2.1 原位聚合原理    7
2.2.2 M-F合成原理    8
2.3 实验方法    9
2.4 实验内容    9
2.4.1十二醇的乳化对微胶囊制备的影响    9
2.4.2 系统浓度对微胶囊大小的影响    11 改性密胺树脂相变微胶囊的制备:http://www.751com.cn/huaxue/lunwen_11759.html