石蜡作为相变材料在储能领域已成为研究热点,其中一个重要问题就是石蜡的封装.以微胶囊包覆的方式对石蜡进行封装,通过界面聚合,以甲基丙烯酸甲酯聚合包覆石蜡微乳液,得到聚甲基丙烯酸甲酯包覆石蜡的核壳结构.研究了复合相变材料的包覆过程中转速、乳化剂的添加量、引发剂的添加量及包覆温度对微胶囊颗粒大小及性能的影响,并提出了微胶囊包覆过程中的"尺寸含量关系",预测了实验平衡点.当转速为2000r/min、乳化剂添加量为4%、引发剂添加量为1%、聚合温度为70℃时,得到粒径为Iμm左右的微胶囊,材料的相变储能约为110J/g,石蜡的包覆率为50%.
Paraffin phase change material has become a research focus in the energy storage field. The encapsulation of paraffin is one of the key techniques for the application purpose. The paraffin is encapsulated through interracial polymerization, using methyl methacrylate (MMA) as the coating material. The core-shell structured micro-capsule is prepared with poly-methylmethacrylate coating the paraffin. The parameters affecting the coating process is investigated, including the mechanical rotation speed, addition amounts of the emulsifier and initiator and coating temperature. The "size-content relation" of coating process is given, which is used to forecast the experimental balance point. When the rotation speed is 2000r/min, the addition amounts of emulsifier and initiator are 4%, and 1% respectively, with the coating temperature at 70℃, the optimized result is obtained. The diameter of the micro-capsule prepared under the above conditions is about 1μm. Its phase change enthalpy is about 110J/g and the coating rate of the paraffin reaches 500%.
参考文献
| [1] | Ames D A .Eutectic cool storage current developments[J].ASHRAE Journal,1990,32(04):45. |
| [2] | 郑立辉,李斌,余磊,黄雄强,沈培,李娟.石蜡微胶囊的热性能研究[J].浙江化工,2004(01):11-12. |
| [3] | 李祎彧 .石蜡微胶囊的制备及影响因素研究[D].同济大学,2007. |
| [4] | De Santis R;Ambrogi V;Carfagna C;Ambrosio L;Nicolais L .Effect of microencapsulated phase change materials on the thermo-mechanical properties of poly(methyl-methacrylate) based biomaterials[J].Journal of Materials Science. Materials in Medicine,2006(12):1219-1226. |
| [5] | 郑涛,陈克宁,黄颂军.界面聚合法制备微胶囊化阻燃剂的研究[J].印染助剂,2007(06):14-16. |
| [6] | 兰孝征,杨常光,谭志诚,孙立贤,徐芬.界面聚合法制备正二十烷微胶囊化相变储热材料[J].物理化学学报,2007(04):581-584. |
| [7] | 樊耀峰 .相变材料纳微胶囊的制备、耐热性能和过冷现象研究[D].天津工业大学,2003. |
| [8] | 苏俊峰 .用于墙体具有自调温功能相变储热微胶囊的制备及性能研究[D].天津:河北工业大学,2004. |
| [9] | 展义臻,朱平,张建波,郭肖青.相变调温海藻纤维的制备与性能研究[J].印染助剂,2006(12):20-23. |
| [10] | 李飞,马烽,程立媛.相变储能技术在建筑节能领域的应用研究[J].化工新型材料,2008(10):40-41,53. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%