Preparation of composite films by direct mixing of phase change material microcapsules and aqueous polyurethane

• Main Authors: Chi-Hsiang Hsu, 徐啟翔
• Other Authors: 段葉芳
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/5p9qv8

碩士 === 國立臺北科技大學 === 化學工程研究所 === 99 === In this study, composite films were prepared by direct mixing of phase change material microcapsules and aqueous polyurethane, then their surface appearance、particle size and thermoanalysis wered analyzed. The main experienment is divide into two partsto proceed. However, at the first part of the experienment, phase-change-material (PCM) microcapsules with poly(urea-formaldehyde) resin were prepared by using in-situ polymerization. The ratio of PCM and poly(urea-formaldehyde) resin,the concertration of surfactant,the rotational speed of emulsification and kinds of PCM wered be varies of experienment. The microcapsules wered analyzed by SEM,DSC,FTIR and particle size distribution analyzer. At the second part of the experienment, prepolymer of polyurethane was synthesized of polypropylene glycol (PPG)、isophorone isocyanate (IPDI) and 2,2-Bis(hydroxymethyl)propionic acid (DMPA) with prepolymer mixing process. In addition, the prepolymer was neutralized by triethyl amine (TEA) , and then reacted with ethylene diamine as chain extention agent. Finally anionic aqueous polyurethane was synthesized by adding deionized water to the above product. The particle size and thermal properties of the polyurethane were analized by DSC,TGA,FTIR and particle size distribution analyzer. At least, composite films were prepared by direct mixing of 5wt％,10wt％,15wt％,20wt％ and 25wt％ phase change material microcapsules and aqueous polyurethane, and the effects of different content percentage on thermal and mechnical properties were investaged by TGA and DSC . Melting point and Td of composite films decreased with the inceasing of the content of phase change material microcapsules, and △H of composite films inceased with the inceasing of the content of phase change material microcapsules.