毕业论文

打赏
当前位置: 毕业论文 > 物理论文 >

多种因数对微胶囊相变材料的影响

时间:2019-08-03 10:16来源:毕业论文
采用原位聚合法,选用壁材为脲醛树脂,芯材为价廉易得的十二醇相变材料,乳化剂为OP-10,分散乳化剂为SMA树脂,合成了微胶囊相变材料。通过改变芯材与壁材的质量比(2:1、3:1、4:

摘要:近年来,虽然我国建筑规模迅速扩大。但遗憾的是,占全社会能耗20%以上的北方,绝大部分还是采用火力发电和燃煤锅炉,这给环境带来了严重的污染。所以利用微胶囊技术包覆相变材料制得微胶囊相变材料,能很好地解决诸多问题:如当相变材料为液态时具有流动性,不易储存,易污染环境;传热效率慢等,引起人们地广泛关注,成为人们研究的热点。
本实验采用原位聚合法,选用壁材为脲醛树脂,芯材为价廉易得的十二醇相变材料,乳化剂为OP-10,分散乳化剂为SMA树脂,合成了微胶囊相变材料。通过改变芯材与壁材的质量比(2:1、3:1、4:1)的实验;改变尿素和三聚氰胺的摩尔比(4:0、3:1、2:2、1:3、0:4)的实验;改变NaCl的质量(分别取芯材的4%、5%、6%)进行实验。同时利用傅立叶变换红外/拉曼光谱仪、扫描电镜对样品性能进行分析和表征。37797
毕业论文关键词:相变材料;微胶囊;原位聚合法;脲醛树脂;十二醇
Influence of various factors on the micro-encapsulated phase change material
Abstract: In recent years,although the scale of China's rapidly expanding construction. Unfortunately,accounting for more than 20% of energy consumption in the north society,the vast majority still use thermal power and coal-fired boilers,which caused serious environmental pollution. So the use of microencapsulation technology covering the phase change material prepared microencapsulated phase change materials,can solve many problems: a fluidity as when the phase change material is liquid,easy to store,easy to pollute the environment;and slow heat transfer efficiency,causing people to attention,become a research focus. 源-自*六'维:论.文]网[www.lwfree.cn
In this study,in-situ polymerization,the choice of wall material is urea-formaldehyde resin,the core material is inexpensive and readily available dodecanol phase change material, emulsifier OP-10,dispersing emulsifier SMA resin,synthetic micro-encapsulated phase change material. By changing the quality of the core material and wall material ratio (2:1,3:1,4:1) test;Changing the molar ratio of urea and melamine (4:0,3: 1,2:2,1:3,0:4) experiments;Change the quality of NaCl (4% were taken of the core material,5%,6%) experiment. While using Fourier transform infrared / Raman spectroscopy,scanning electron microscopy sample performance analysis and characterization.
Keywords:    Phase change materials;Microcapsules;Situ polymerization;Urea-formaldehyde resin;Dodecanol
目录
摘要    ii
Abstract    ii
目录    iv
1    绪论    1
1.1    选题背景及意义    1
1.2    相变材料    1
1.2.1    概述    1
1.2.2    相变材料的分类[38]    2
1.2.3    相变材料的选择    2
1.3    微胶囊技术的发展    3
1.3.1    概述    3
1.3.2    选择芯材和壁材[1]    3
1.3.3    制备微胶囊的常见方法    4
1.4    微胶囊相变材料的研究进展    5
1.4.1    国外研究进展    5
1.4.2    国内研究进展    5
1.5    本课题主要研究内容    5
1.6    实验方案    6
1.7    实验方法    6 源-自*六'维:论.文]网[www.lwfree.cn
2    十二醇/脲醛微胶囊相变材料的制备    6
2.1    引言[1]    6
2.2    微胶囊相变材料的制备原料及方法的选择    6 多种因数对微胶囊相变材料的影响:http://www.lwfree.cn/wuli/20190803/36659.html
------分隔线----------------------------
推荐内容