Microindentation of Microencapsulated Phase Change Materials
Due to the small size of microcapsules (1-1000 µm) used in a large number of applications, the individual rupture force of an individual particle has been difficult to obtain. A new technique involving nanomechanical testing was used in this study. We propose a standard method of testing the individual rupture force of Micronal®DS5008 microcapsules with an average size of approximately 11.2µm. Microcapsules were subjected to compressive force testing to determine the amount of force required to rupture the microcapsules. In order to find the mechanical properties of these microcapsules a standard nanoindentation system was setup with a 10µm radius diamond head cone indentation tip and the individual microcapsules were compressed till rupture occurred.
George Ferguson, Ashvin Thambyah, Michael A Hodgson and Kelly Wade
A. Rahman et al., "Microindentation of Microencapsulated Phase Change Materials", Advanced Materials Research, Vol. 275, pp. 85-88, 2011