Journal of South China University of Technology(Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (7): 97-101.

• Materials Science & Technology • Previous Articles     Next Articles

Preparation of Low-Breakage Polyurea Microcapsules Containing n-Octadecane with Soft Segments

Pei Li-xia1  Yao Xin-dong2  Liu Zheng-ping1  Zhang Zheng-guo1  Gao Xue-nong1  Ji Hong-bing1    

  1. 1. Key Laboratory of Enhanced Heat Transfer and Energy Conversation of the Ministry of Education, South. China University of Technology, Guangzhou 510640, Guangdong, China ; 2. The Key Laboratory of Green Chemistry of Guangxi, Guangxi University for Nationalities, Nanning 530006, Guangxi, China
  • Received:2007-07-27 Revised:2008-01-20 Online:2008-07-25 Published:2008-07-25
  • Contact: 纪红兵（1970-），男，教授，主要从事绿色化工的研究． E-mail:cehbji@scut．edu．cn
  • About author:裴丽霞（1977-），女，讲师，主要从事功能材料的研究．E-mail：peilixia@scut．edu．cn
  • Supported by:

    国家自然科学基金资助项目（20576045）;新世纪优秀人才支持计划资助项目（NCET-06-740）;华南理工大学传热强化与过程节能教育部重点实验室开放基金资助项目（KF0607）.

PDF

669

Abstract:

Polyurea microcapsules cOntaining n-octadecane were prepared via the interfacial polymerization of lowactivity flexible isophorone diisocyanate and diethylene triamine, and then were characterized by means of FT-IR, optical microscopy and TG. Moreover, the effects of emulsifier （ polyoxyethyloctylpheny ether-10, marked with OP- 10） content and n-octadecane content on the formation and morphology of the microcapsules were investigated. The results show that, in the optimal conditions, namely, an OP-10 mass fraction of 0. 5% and a n-octadecane content of 0. 3 g/mL, well-shaped microcapsule spheres composed of n-octadecane （the core） and polyurea （the shell） can be obtained, and that the microcapsules, 1 -6 μm in diameter, possess low leakag e and good thermal stability. In addition, GC results indicate that the n-octadecane content in the microcapsules is 35.4%.

Key words: microcapsule, interfacial polymerization, n-octadecane, polyurea