首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Microencapsulation of octadecane as a phase-change material by interfacial polymerization in an emulsion system
Authors:Jeong-Sook Cho  Aehwa Kwon  Chang-Gi Cho
Institution:(1) Center for Advanced Functional Polymers Department of Fiber & Polymer Science Hanyang University, Seoul 133-791, Korea e-mail: cgcho@hanyang.ac.kr Tel.: +82-2-22900497 Fax: +82-2-22921053, KR
Abstract: Microcapsules containing phase-change material for thermal adaptable fiber application were synthesized and characterized. The microcapsules of about 1 μm in diameter were prepared using an interfacial polycondensation method with toluene-2,4-diisocyanate (TDI) and diethylenetriamine (DETA) as monomers in an emulsion system. Octadecane was used as a phase-change material and NP-10 which is nonionic surfactant, was used as an emulsifier. To investigate the reaction ratio of monomers, microcapsules were synthesized with 3 g TDI and 0–4 g DETA. Polyurea microcapsules were formed not only by reaction with TDI and DETA, but also by reaction of TDI with hydrolyzed TDI at the interface. TDI was reacted with DETA in the weight ratio of 3:1. NP-10 was reacted with TDI to form urethane. The microcapsules containing octadecane showed a phase change of octadecane at 29–30 °C. The core content measured using the heat of fusion of octadecane was less than that calculated. The efficiency of octadecane encapsulation increased as the core content decreased. Received: 17 July 2001 Accepted: 13 September 2001
Keywords:  Microcapsules  Interfacial polycondensation method  Octadecane  Encapsulation  Polyurea
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号