H₂O₂-microwave treated graphite stabilized stearic acid as a composite phase change material for thermal energy storage

Abstract

Flake graphite (FG) was treated by microwave radiation in hydrogen peroxide solution and used to support stearic acid (SA) to synthesize SA/FG composites for thermal energy storage. Furthermore, the mechanism of the enhanced performance of SA/FG 3 was further revealed by monitoring functional groups of the surface of FG and demonstrated on the atomic-scale. Infrared imaging showed SA/FG 3 possessed superior thermal-regulated properties. Therefore, all these thermal properties indicate SA/FG 3 has potential for application in thermal energy storage systems.

Effects of Wet Chemical Oxidation on Surface Functionalization and Morphology of Highly Oriented Pyrolytic Graphite

“…The C-OH functional groups can have similar to binding energies of ether groups 67, 72-75 (532.5-533.5 eV) and epoxy groups (532.3 eV). 73,74,76 Other references (see Table S10 in the supporting information section) also confirm that a slightly higher binding energy is expected for the hydroxyl group of the COOH group at 533-535 eV 67,68,73,74,77,78 , in agreement with our assignment, and 530.6-531.6 eV for the C=O entity in the COOH group.…”

Effects of Wet Chemical Oxidation on Surface Functionalization and Morphology of Highly Oriented Pyrolytic Graphite

“…The C-OH functional groups can have similar to binding energies of ether groups 67,[72][73][74][75] (532.5-533.5 eV) and epoxy groups (532.3 eV). 73,74,76 Other references (see Table S10 in the supporting information section) also confirm that a slightly higher binding energy is expected for the hydroxyl group of the COOH group at 533-535 eV 67,68,73,74,77,78 , in agreement with our assignment, and 530.6-531.6 eV for the C=O entity in the COOH group.…”

Stearic Acid/Inorganic Porous Matrix Phase Change Composite for Hot Water Systems

“…Yi et al [13] proposed a core-shell MMT/stearic acid composite with more than 80% stearic acid inside and the thermal conductivity was achieved with a 159.46% increase by MMT nanosheets. (2) Absorbing stearic acid into porous materials such as carbon materials, metal foams, dioxides, clays, expanded vermiculite (EV), and so on [14,15,16,17,18,19,20,21,22,23,24]. For example, Li et al [16] investigated the effects of a carbonized 3D reduced graphene/metal-organic framework on the thermal energy storage performance of stearic acid.…”