密胺树脂及聚脲壁材相变微胶囊的制备与表征

发布时间：2018-02-28 05:30

  本文关键词： 相变微胶囊 界面聚合法 原位聚合法　出处：《哈尔滨工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：用微胶囊技术将相变材料进行包覆,解决了相变材料在相变温度发生流淌无法使用及和基体材料的相容性问题,将相变材料用于建筑行业,有利于降低建筑能耗,节约能源。本文研究了不同壁材制备相变微胶囊的合成工艺,并对产物的形貌及性能进行了分析表征。结果表明制备密胺树脂为壁材的微胶囊时,采用Tween和OP-10为乳化剂制备的相变微胶囊的表面形貌光滑,Tween为乳化剂时粒径分布均匀,无团聚现象。聚合温度为65℃时生成的微胶囊的表面形貌光滑,此时微胶囊的抗渗透性能优异,当乳化剂的用量为10%,形成的微胶囊分散性好。反应时间为4小时时微胶囊的表面最光洁,粒径均匀。采用界面聚合法制备聚脲壳层的微胶囊时,我们采用的是异佛二酮二异氰酸酯和胺反应,异佛二酮二异氰酸酯的毒性比一般用的2,6-甲苯二异氰酯的毒性低。采用PVA为乳化剂时制得的微胶囊的表面形貌光洁,微胶囊尺寸较大,会出现凹陷、褶皱及壳层破裂的现象。采用OP-10为乳化剂制备的微胶囊的表面光洁,粒径尺寸小,出现破壳的现象少。本文分别采用原位聚合法制备了密胺双层壳层的相变微胶囊,采用界面聚合法制备了聚脲为内壳层,密胺树脂为外壳层的相变微胶囊,结果表明,以聚脲-密胺树脂为壳层的相变微胶囊的抗渗透性能优异,而采用三聚氰胺甲醛制备的双层相变微胶囊的热焓值最高。采用壁材对芯材进行包覆,使得微胶囊的耐热温度在很大程度上得到了提高。
[Abstract]:The phase change material is coated with microencapsulation technology, which solves the problem that phase change material can not be used at phase change temperature and compatibility with matrix material. The application of phase change material in construction industry is beneficial to reduce building energy consumption. In this paper, the synthesis process of phase change microcapsules with different wall materials was studied, and the morphology and properties of the products were analyzed and characterized. The surface morphology of phase change microcapsules prepared by using Tween and OP-10 as emulsifiers is smooth. When Tween is emulsifier, the particle size distribution is uniform and there is no agglomeration. The surface morphology of the microcapsules prepared at 65 鈩，

本文编号：1545954