Thermodynamics Research Center / ThermoML | Thermochimica Acta

An influence of Al2O3 nanoparticles on the caloric properties and parameters of the phase transition of isopropyl alcohol in solid phase

Zhelezny, V.[Vitaly], Motovoy, I.[Igor], Khliyeva, O.[Olga], Lukianov, N.[Nikolay]
Thermochim. Acta 2019, 671, 170-180
ABSTRACT
In present paper we investigated the influence of Al2O3 nanoparticles on the specific heat capacity of isopropyl alcohol in the temperature range 80 186 K. The measurements of the specific heat capacity were performed by an adiabatic calorimeter. It was found that below the melting temperatures the solution of isopropyl alcohol with Al2O3 nanoparticles can be in crystalline, glassy and liquid metastable states. The presence of Al2O3 nanoparticles in isopropyl alcohol leads to a decrease of the specific heat capacity and the enthalpy of phase transitions crystalline state liquid and glassy state liquid metastable state . It was demonstrated that not only presence of the nanoparticles but also the existence of the adsorbed interfacial phase from the molecules of the base liquid around the nanoparticles decreases the isopropyl alcohol melting heat. Based on obtained experimental data for the melting heat of the nanofluids of isopropyl alcohol/Al2O3 the mass fraction of the base fluid in the interfacial phase and the mean equivalent radius of nanoparticles with interfacial phase have been determined at the melting point.
Compounds
# Formula Name
1 C3H8O propan-2-ol
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
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Triple point temperature, K ; Glass
  • Glass
  • Liquid
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal
  • Crystal
  • Liquid
  • Gas
  • Adiabatic calorimetry
  • 1
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Vacuum adiabatic calorimetry
  • 14
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Glass
  • Temperature, K; Glass
  • Pressure, kPa; Glass
  • Glass
  • Vacuum adiabatic calorimetry
  • 6
  • POMD
  • 1
  • Molar heat capacity at constant pressure, J/K/mol ; Metastable liquid
  • Temperature, K; Metastable liquid
  • Pressure, kPa; Metastable liquid
  • Metastable liquid
  • Vacuum adiabatic calorimetry
  • 4