Improvement of shape stability and thermal properties of PCM using polyethylene glycol (PEG)/sisal fiber cellulose (SFC)/graphene oxide (GO)

This study prepared a polyethylene glycol (PEG)/sisal fiber cellulose (SFC)/graphene oxide (GO) composite using a novel dynamic impregnating method to obtain a high-performance shape-stabilized phase change materials (PCMs). In this material, the ternary system PEG served as the latent heat storage material and SFC and GO served as the supporting materials. The structure, morphology, thermal conductivity, phase change temperature, and latent heat of the composite PCMs were characterized by fourier transform infrared spectroscopy, wide-angle X-ray diffraction, polarizing microscope, digital camera, scanning electron microscopy, differential scanning calorimetry, and thermal conductivity analysis. Results show that the composite PCMs exhibit a fine impregnation morphology and excellent shape-stabilized feature during the phase change process, the shape of the PEG/SFC/GO composite PCMs are unchanged even after being placed on a 85 A degrees C hot plate. Thermal behavior tests indicate that the composite PCM (PEG weight percentage of 80 wt.%) shows a high latent heat storage capacity of approximate 140 J/g after more than 100 thermal cycling, and exhibits good heat-conducting performance.