Microencapsulated n-octadecane with different methylmethacrylate-based copolymer shells as phase change materials for thermal energy storage

Preparation and characterization of flame retardant phase change materials by microencapsulated paraffin and diethyl ethylphosphonate with poly(methacrylic acid‐co‐ethyl methacrylate) shell

“…4 C, respectively, while pure paraffin has a melting point of 26.3 C and a crystallization point of 28.8 C. It was found that the melting points and crystallization points of all microPCMs decreased or increased slightly in comparison with those of pure n-octadecane. These results are consistent with earlier findings, 12,26,31,32 indicating that the low thermal conductivity of the polymer can slow down heat transferring through the microPCMs.…”

Supercooling elimination of phase change materials (PCMs) microcapsules

“…Results have shown that the crystallization temperature of the PCMMCs was about 10 C lower than that of non-encapsulated PCM, while the melting temperature was very slightly affected. The same results were reported using same method but with poly methyl methacrylate instead of poly(divinylbenzene) as a polymer shell [8,9]. Different attempts were conducted to reduce supercooling of PCMMCs such as the controlling of the size of the PCMMCs [10,11], adding nucleating agent or metal additives to the PCM prior to encapsulation [12e14] or by optimizing the composition and structure of the capsule shells [15].…”

Macroencapsulation and characterization of phase change materials for latent heat thermal energy storage systems

“…Considerable work has been carried out on the microencapsulation of the low melting (50-120°C) inorganic salt hydrates and organic materials such as waxes, terpenes, and low molecular weight polymers [23][24][25][26][27]6]. Compared to macroencapsulation, the microencapsulation of PCMs provides faster charging and discharging rates because of the smaller distance for heat transfer.…”