Phase change slurries (PCS) consist on a carrier fluid binary system, where water is mostly used as
continuous phase and micro-encapsulated phase change materials (MPCM) are used as dispersed phase.
PCS are used in Thermal Energy Storage (TES) for building applications, combining the latent heat capacity
of
the MPCM with the sensible heat capacity of the carrier fluid, and at the same time giving the
PCM pumpable properties. In this study, two PCS samples are compared and characterized, the commercial
Micronal® DS 5007 X from BASF and a laboratory made PCS28. Thereby, in this paper thermal
stability is studied by using thermogravimetrical analysis (TGA) and the main components of the MPCM
have been studied using Fourier transformed infrared spectroscopy (FT-IR). Moreover, TGA coupled with
FT-IR is used to study deeply the thermal decompositions of the PCS microcapsules and products derived
thereof. Finally, differential scanning calorimetry (DSC) is performed to study the melting enthalpy and
the melting temperature range of the phase change material (PCM). This paper concludes that both types
of PCS have good potential from thermal energy storage purposes such as solar space heating
applications.
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