Introduction of Phase Change Material into Sustainable Carbon Materials for Enhanced Shape Stability and Thermal Conductivity

摘要

New sustainable carbon materials were synthesized from a lowprice and eco-friendly carrot via hydrothermal reaction and carbonization approach.Afterwards,palmitic acid(PA)was impregnated into the carrot-derived carbon material(CCM)to prepare PA@CCM composites through vacuum impregnation method.The thermal properties and shape stability of PA@CCM composites were evaluated by differential scanning calorimetry(DSC),thermal conductivity and thermal cycling tests.Owing to the special hybrid microstructure of the CCMs,the loading ratio of PA in PA@CCM composites could reach up to 85.3% with the latent heat of 166.4 Jg~(-1).More importantly,the PA@CCM composites show negligible leakage above the melting point of PA,exhibiting excellent shape stability.Compared with pristine PA,the thermal conductivity of PA@CCM composites could greatly enhanced by 145.5%.Thus,PA@CCM composites can be considered as a promising candidate for thermal energy storage applications.