物理化学学报 >> 2009, Vol. 25 >> Issue (12): 2590-2596.doi: 10.3866/PKU.WHXB20091208

研究论文 上一篇    下一篇

丙烯酸共聚物囊壁的正十八烷微胶囊的制备和性能表征

单新丽, 王建平, 刘妍, 张兴祥   

  1. 改性与功能纤维天津市重点实验室, 天津工业大学功能纤维研究所, 天津 300160
  • 收稿日期:2009-07-02 修回日期:2009-09-21 发布日期:2009-11-27
  • 通讯作者: 张兴祥 E-mail:zhangpolyu@gmail.com

Fabrication and Characterization of Microencapsulated n-Octadecane with an Acrylic Co-polymeric Shell

SHAN Xin-Li, WANG Jian-Ping, LIU Yan, ZHANG Xing-Xiang   

  1. Tianjin Municipal Key Laboratory of Fiber Modification and Functional Fibers, Institute of Functional Fibers, Tianjin Polytechnic University, Tianjin 300160, P. R. China
  • Received:2009-07-02 Revised:2009-09-21 Published:2009-11-27
  • Contact: ZHANG Xing-Xiang E-mail:zhangpolyu@gmail.com

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摘要：

以二丙烯酸1,4-丁二醇酯为交联剂, 成功制备了甲基丙烯酸甲酯-甲基丙烯酸共聚物为壁材, 正十八烷为囊芯的相变材料微胶囊. 采用扫描电子显微镜(SEM)、差示扫描量热仪(DSC)和热重分析仪(TG)分别考察了单体与芯材投料比、单体浓度和交联剂的含量对微胶囊形貌、相变热性能、热稳定性能的影响. 实验结果表明: 随着单体与芯材投料比或单体浓度的增加, 微胶囊表面均变得致密, 壁厚增加; 随着交联剂含量的增加, 微胶囊的表面变得更加致密光滑, 热稳定性显著增强; 随着单体与芯材投料比的增大, 微胶囊热焓值减小, 被包裹的囊芯含量减少.

关键词: 微胶囊, 丙烯酸, 正十八烷, 热稳定性, 交联剂

Abstract:

Microcapsules containing n-octadecane were synthesized using a methyl methacrylate/methacrylic acid co-polymeric shell with 1,4-butylene glycol diacrylate (BDDA) as a cross-linking agent. The surface morphologies, thermal physical properties, and thermal stabilities of the microencapsulated n-octadecane(MC18) were investigated by scanning electronic microscopy, differential scanning calorimetry, and thermogravimetric analysis, respectively. Experimental results showed that by increasing the mass ratio of monomer/core or the monomer concentration, the surfaces become more compact and the shell thickness increase. The thermal stability of MC18 can be improved by adding a cross-linking agent and the surface becomes much more compact and smoother by increasing the feed of the cross-linking agent BDDA. The thermal resistance temperature of MC18 improves obviously. As the mass ratio of monomer/core increases, the enthalpy of MC18 decreases and the encapsulation rate is lower.

Key words: Microcapsule, Acrylic acid, n-Octadecane, Thermal stability, Cross-linking agent