高等学校化学研究 ›› 2010, Vol. 26 ›› Issue (3): 496-500.
• Articles • 上一篇
Preparation and Characterization of Microcapsules for Self-healing Materials
LIAO Le-ping*, ZHANG Wei, ZHAO Yang and LI Wu-Jun
- National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, P. R. China
Preparation and Characterization of Microcapsules for Self-healing Materials
LIAO Le-ping*, ZHANG Wei, ZHAO Yang and LI Wu-Jun
- National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, P. R. China
摘要：
The urea-formaldehyde(UF) capsules filled with a healing agent, a mixture of epoxy resins(epoxy 711 and E-51) as core material, were produced by means of one step in-situ polymerization. The characteristics of these microcapsules were studied via scanning electron microscopy(SEM), particle size analysis, FTIR and DSC/TGA. The results show that the dispersed and integrated microcapsules of 5 μm in shell thickness were synthesized successfully. The capsules were produced with diameters ranging from 10 to 250 μm via controlling agitation rate. Young’s mo- dulus of the capsule was a little lower than those of the epoxy resins, but the microcapsules having such a shell thickness were robust enough to survive handling during manufacturing self-healing composites. When damage occurred in the epoxy matrix, the crack could rupture the microcapsule to make the repairing agent release.