Thermal properties and characterization of palmitic acid/nano silicon dioxide/graphene nanoplatelet for thermal energy storage

Abstract

Palmitic acid (PA), nano silicon dioxide (nano SiO 2 ), and graphene nanoplatelets (GNPs) were fabricated to composite phase change materials (PCMs) for thermal energy storage. PA acted as PCM, nano SiO 2 was used as supporting material. GNP as thermal conductivity promoter was added to modify composite PCM. Nano SiO 2 has good adsorption property and can adsorb liquid PCM to prevent leakage. Leakage measurement indicated that PA maximum content in composite PCM is 70 wt%. Chemical and crystal structures, and microstructure of composite PCM were tested by Fourier transformation infrared spectroscope, X-ray diffractometer and scanning electronic microscope, which showed that the raw materials are well mixed by physical action. Differential scanning calorimeter result presented that composite PCM possess phase change temperature at about 60 C and latent heat of 128.42 kJ/ kg. Thermogravimetric analyzer and thermal cycle experiment showed that composite PCM have outstanding thermal stability and durability. Thermal conductivity apparatus measurement results indicated that thermal conductivity of composite PCM with 5 wt% GNP is 1.65 times that of composite PCM without GNP. Therefore, this composite PCM are potential materials for thermal energy storage. K E Y W O R D Scomposite phase change material, graphene nanoplatelet, nano silicon dioxide, thermal energy storage, thermal property

Gamma irradiation, thermal conductivity, and phase change tests of the cement‐hyperbranched poly amino‐ester‐block‐poly cabrolactone‐polyurathane plaster‐lead oxide and arsenic oxide composite for development of radiation shielding material

“…Also from the phase change enthalpy, it can be seen that the heat of the composite alters with the increase of adding percentage material content 73‐77 . As can be seen evidently from the figures, the DSC properties of the composites are varied depending on the heat confinement rates and energy capacities 78‐81 …”

A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

“…1, 3 and 5% wt. graphene nanoplatelets (GNP) were also investigated as an additive for palmitic acid-silica NPs composite PCMs [ 148 ]. The maximum loading without leakage of the PA-SiO 2 material was determined to be 70% wt.…”

Form‐stable phase‐change materials supported by 1‐octadecylamine‐modified montmorillonite for latent heat storage

“…1,2 Organic phase-change materials (PCMs) used as LHS devices are an exceptionally promising approach to alleviate these aforementioned concerns by providing reversibly high thermal energy storage (TES) capacities with isothermal operating characteristics during the phase transition process. [3][4][5][6] Recently, organic PCMs, such as paraffin wax, [7][8][9] fatty alcohols, [10][11][12][13] fatty acids, [14][15][16] fatty amines, [17][18][19] and polyethylene glycol, 20,21 have been extensively employed as TES and thermal management systems (TMS) for energy-saving buildings, [22][23][24][25][26] electronic devices, 27,28 lithium-ion batteries, [29][30][31][32] solar energy harvesting plants, 33,34 waste heat recovery, 35 and smart thermos-regulated textiles 36 according to their various merits, such as high Dongli Fan and Yuan Meng contributed equally to this work.…”