自修复微胶囊的制备与表征

Preparation and Characterization of Microcapsules for Self-healing Material

以双环戊二烯(DCPD)为芯材、脲醛树脂为壁材,利用原位聚合法合成自修复微胶囊。采用光学显微镜观察了微胶囊的形成过程,傅里叶红外光谱表征了微胶囊的化学成分,热失重分析仪和激光粒度仪表征了微胶囊的热稳定性和粒径分布。研究表明,脲醛树脂能将芯材DCPD良好包封,微胶囊形貌质量好,分散效果好,热稳定性好,粒径分布较窄,平均粒径为10.394μm。

Microcapsules for self-healing material were synthesized by in-situ polymerization with urea-formaldehyde resin as the shell material and dicyclopentadiene as the core material. The formation process of microcapsules was observed by using optical microseopy（OM）. The chemical structure was characterized by fourier transform infra- red（FTIR）. The thermal stability and particle size distribution of microcapsules were analyzed by thermogravimetric analysis （TGA） and laser particle size analyzer. The results indicate that dicyclopentadiene is well encapsulated by urea-formaldehyde resin. The microcapsules with smooth surface and good dispersibility are prepared. The microcapsules are obtained with good chemical stability and narrow particle size distribution, and the average particle size is 10. 394μm.