Preparation and Characterization of Lauric Acid/Modified Fly Ash/Graphene Composite as Low-Cost and Eco-Friendly Phase Change Materials for Thermal Energy Storage

Fly ash is a kind of industrial solid waste that considered “hazardous waste”. In this study, supporting matrix modified fly (MFA) was employed to package lauric acid (LA) via facile direct impregnation method involving less experimental error. A low-cost and eco-friendly form-stable phase change material (PCM) LA/MFA/graphene (G) fabricated, with G as the thermal conductivity enhancer. The preparation leakage testing an LA/MFA/G PCM (FSPCM) were investigated in detail. test results indicated good efficiency obtained using MFA higher specific surface area richer pore structure pack LA. Then, composites characterized scanning electronic microscope (SEM), Fourier transform infrared spectroscope (FTIR), differential calorimeter (DSC), gravimetric analyzer (TGA). showed excellent form stability by adding matrix. SEM analysis LA could be well dispersed into MFA. FTIR demonstrated components FSPCM quite compatible. DSC illustrated (5 wt. %) had melting point 45.38 °C latent heat 41.08 J/g. TGA revealed prepared better compared within its working temperature range. addition, effects on transfer performance examined. short, simple process error can contribute performance. research not only improved comprehensive utilization waste, but also promotes application field building energy conservation.