Preparation and Thermal Properties of 1-Hexadecanol-Palmitic Acid Eutectic Mixture/Activated Carbon Composite Phase Change Material for Thermal Energy Storage

摘要

In this study,a new kind of 1-hexadecanol-palmitic acid(HDPA)binary eutectic mixture and the composite phase change materials(PCMs)composed of HD-PA absorbed into activated carbon(AC)pores with different mass percentage of 50,55,60,and 65% were prepared by vacuum impregnation method.The chemical structural,thermal stability and thermal durability of HD-PA/AC composite phase change materials(CPCMs)with different mass fraction of HD-PA was characterized by Fourier transformation infrared(FT-IR)spectrometer,differential scanning calorimetry(DSC)and thermogravimetric analyzer(TGA),respectively.The specific surface area of AC were determined to be 760 m~2g~(-1)and abundant mesopores and micropores with the sizes at 1.8 and 0.6 nm were observed according to the N2 adsorption-desorption measurement.DSC results showed that the onset melting temperature and latent heat of novel HD-PA eutectic were 50.2 °C and 226.6 Jg~(-1),respectively.The addition of AC to the PCM of binary HD-PA eutectic can enhance its thermal stability,durability and thermal energy storage-release rate.The form-stable HD-PA/AC CPCM can be used as energy storage materials in many fields owing to its good thermal properties and chemical stability.