Abstract
Microencapsulated paraffin wax/polyaniline was prepared using a simple in situ polymerization technique, and its performance characteristics were investigated. Weight losses of samples were determined by Thermal Gravimetry Analysis (TGA). The microencapsulated samples with 23% and 49% paraffin showed less decomposition after 330 °C than with higher percentage of paraffin. These samples were then subjected to a thermal cycling test. Thermal properties of microencapsulated paraffin wax were evaluated by Differential Scanning Calorimeter (DSC). Structure stability and compatibility of core and coating materials were also tested by Fourier transform infrared spectrophotometer (FTIR), and the surface morphology of the samples are shown by Field Emission Scanning Electron Microscopy (FESEM). It has been found that the microencapsulated paraffin waxes show little change in the latent heat of fusion and melting temperature after one thousand thermal recycles. Besides, the chemical characteristics and structural profile remained constant after one thousand thermal cycling tests. Therefore, microencapsulated paraffin wax/polyaniline is a stable material that can be used for thermal energy storage systems.
Highlights
Introduction330 °C than with higher percentage of paraffin
Thermal Gravimetry Analysis (TGA) results show that the thermal stability of the microencapsulated paraffin wax/polyaniline with the ratio of (1:9) and (2:8) is better than that of
Differential Scanning Calorimeter (DSC) results indicated that the average latent heats of melting and freezing of the microencapsulated paraffin wax/polyaniline were around 30–32 J/g and
Summary
330 °C than with higher percentage of paraffin These samples were subjected to a thermal cycling test. It has been found that the microencapsulated paraffin waxes show little change in the latent heat of fusion and melting temperature after one thousand thermal recycles. Microencapsulated paraffin wax/polyaniline is a stable material that can be used for thermal energy storage systems. PCMs are able to absorb and release large amounts of latent heat according to the increase and decrease in the temperature of the surroundings. They are classified as organic, inorganic and eutectic compounds [1,2,3].
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