Using mesoporous carbon to pack polyethylene glycol as a shape-stabilized phase change material with excellent energy storage capacity and thermal conductivity

A novel shape-stabilized phase change material was successfully prepared using polyethylene glycol (PEG) as (PCM) and mesoporous carbon FDU-15 support via the melting impregnation method. The structural thermal properties of materials were measured by TEM, SEM, XRD, FT-IR, nitrogen adsorption-desorption isotherms DSC, respectively. maximum loading PEG/FDU-15 reaches up to 75 wt%, corresponding crystallization ratio is 71%, which superior other mesoporous-based composite PCMs. Molecular dynamic (MD) analysis showed that some PEG adhered pore wall with an amorphous structure failed crystallize, ultimately resulting in a gap between latent heat theoretical value. It interesting filling could stimulate frequency shift atomic vibration FDU-15, then just fell dominant vibrational zone PEG, despite suppressed after compounding. Accordingly, conductivity more than 60% higher compared pure relates reinforced matching skeleton PCM material. applied pack for first time delivered better performance mesopore-based