Preparation and properties of graphene oxide grafted methoxy polyethylene glycol phase change material.

To solve the problems of easy leakage and low thermal conductivity in the use of phase change materials-methoxy polyethylene glycol (MPEG), a shaped phase change material FSPCM with spongy graphene oxide (SG) as the carrier was prepared by a combination of chemical and physical methods. The chemical structure, phase change properties, high temperature thermal deformation effect of FSPCM were tested using infrared spectrometer, Raman spectrometer, differential scanning calorimeter, thermal bench and thermal conductivity meter. The results indicate that MPEG is successfully loaded onto SG by physical adsorption and esterification. The phase transition temperature is 37.5 °C and the melting enthalpy is 129.7 J/g when the mass fraction of SG in FSPCM is 6%, with an enthalpy efficiency of 95.2%, and the high temperature heat setting effect is still good at 250 °C. After blending FSPCM with polypropylene (PP), the phase change temperature of the blended material is 32.9 °C and the melting enthalpy is 12.1 J/g. The thermal conductivity of the blended material is improved by 35% compared with that of pure PP, indicating that the shaped phase change material is expected to be used in polypropylene phase change fibers. [ABSTRACT FROM AUTHOR]