双调复合微胶囊材料的制备及热湿性能研究

发布时间：2018-06-13 05:14

  本文选题：相变微胶囊 + 原位聚合法　； 参考：《西安建筑科技大学》2013年硕士论文

【摘要】：随着我国经济增长速度的不断加快，能源紧缺的现状呼吁着节能策略的推出，促使科研工作者在节能领域进一步开拓新的研究方向。其中在建筑领域节能技术方面，利用相变微胶囊封装技术所达到的储能效果，将其应用在建筑围护结构，通过储(放)能作用的发挥，达到解决建筑室内温度稳定所需最小能量的目的。因此，如何在节能领域有效利用能源并能满足人们居住的舒适度，开发研究具有储能储湿性能的建筑材料，成为该领域研究难点之一。 本文首先选取价格低廉的相变石蜡为核、高吸油性树脂聚丙烯酸酯为内壳，采用化学合成方法，开展了大量探索试验，获得性能良好的单壳相变微胶囊，，确定其主要参数分别为芯壁比5:2、乳化剂用量和乳化时间分别为4%和20min，在此基础上，选取高吸水性树脂聚丙烯酸钠为壁材，利用界面聚合法制备具有调温调湿性能的双壳相变微胶囊。 其次，利用电子扫描显微镜(SEM)、红外光谱分析、饱和盐溶液法、差示扫描量热仪(DSC)以及热重（TG）对单、双壳相变微胶囊分别进行了形貌、结构、热湿性能、稳定性的表征。测试结果表明：双壳相变微胶囊的外观形状呈现出近似球形、壳层包覆完整；与单壳相变微胶囊相比，具有较好的吸放湿能力，而且对相变石蜡发生固—液相变时阻滞作用更好，可耐温度可达到123℃。 利用建筑石膏自身具有的调湿性能并作为抹灰材料的实际应用情况，将本文制备的双壳相变微胶囊按照不同比例掺入到石膏胶凝材料中，制作相变储能储湿石膏基试件，在一定的模拟环境下对试件进行了储能试验和吸放湿性能试验。结果表明：所研究的相变储能石膏基材料具有适宜的相变温度及一定的储（放）热能力，且吸放湿性能良好。
[Abstract]:With the acceleration of economic growth in our country, the current situation of energy shortage calls for the introduction of energy-saving strategies, which urges researchers to further develop a new research direction in the field of energy conservation. In the field of building energy saving technology, using phase change microencapsulation technology to achieve the effect of energy storage, apply it to the building envelope structure, through the use of energy storage (discharge) function, To achieve the purpose of solving the minimum energy required for indoor temperature stability. Therefore, how to effectively use energy in the field of energy conservation and can meet the comfort of people, the development and research of energy storage and moisture storage of building materials has become one of the difficulties in this field. In this paper, phase change paraffin (PCP) with low price was selected as core, polyacrylate as inner shell and polyacrylate as inner shell. By chemical synthesis, a large number of exploratory experiments were carried out to obtain single-shell phase change microcapsules with good performance. The main parameters were determined as core wall ratio of 5: 2, emulsifier dosage of 4% and emulsifying time of 20 min. On this basis, sodium polyacrylate, a superabsorbent resin, was selected as wall material. Double shell phase change microcapsules were prepared by interfacial polymerization. Secondly, single and double shell phase change microcapsules were characterized by SEM, infrared spectroscopy, saturated salt solution method, differential scanning calorimeter (DSC) and thermogravimetric (TG), respectively. The results show that the appearance shape of double shell phase change microcapsule is approximately spherical, and the shell coating is complete, and compared with single shell phase change microcapsule, it has better moisture absorption and desorption ability. Moreover, it is better to block phase change paraffin in solid and liquid phase, and the temperature can be up to 123 鈩

本文编号：2012853