The drawbacks of the relatively high phase change temperatures, fluid leakage, and low thermal conductivity of organic phase change materials limit their applications. Expanded graphite used in this study played two roles, one was shape-stabilized container, and another was a heat transfer intensifier. Stearic acid was impregnated into expanded graphite to form the shape stabilized organic-inorganic phase change composites with a high latent heat, minute supercooling, and no fluid leakage. The results showed that the melting and solidifying enthalpies were reached up to about 168 J/g and 163 J/g, and the phase change temperature is about 53.00 deg C. The supercooling of the samples was diminished to 0.35 deg C. The optimum mixing mass ratio of the stearic acid and expanded graphite for preparing the samples was about 19:1. The samples exhibited a good thermal stability and thermal conductivity.
Compounds
#
Formula
Name
1
C18H36O2
octadecanoic acid
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
1
Triple point temperature, K ; Crystal
Crystal
Liquid
Air at 1 atmosphere
DSC
1
POMD
1
Molar enthalpy of transition or fusion, kJ/mol ; Crystal