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Comparison of micro-DSC and light scattering methods for studying the phase behavior of n-alkane in the oil-in-water dispersion


This article investigates the phase behavior of n-octacosane (C28H58) in the form of an aqueous dispersion with a particle size of about 100 nm. Samples of stable dispersions were prepared by ultrasonication without the addition of surfactants. Studies at various concentrations of n-alkane were performed by differential scanning calorimetry (DSC), powder X-ray diffraction, and light scattering methods. At low n-alkane concentrations, the sensitivity of DSC is not sufficient to detect the paraffin phase transitions. The light scattering method allows determining the phase transition temperatures (melting, crystallization, rotator phases) of n-alkane even in the 10−4 mass% dispersion.

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This work was supported by Russian Science Foundation (Grant Number 19-79-30091).

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Correspondence to Vladimir Kuryakov.

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Kuryakov, V., Zaripova, Y., Varfolomeev, M. et al. Comparison of micro-DSC and light scattering methods for studying the phase behavior of n-alkane in the oil-in-water dispersion. J Therm Anal Calorim 142, 2035–2041 (2020).

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  • Dispersions
  • n-alkanes
  • Phase transitions
  • Light scattering
  • Rotator phases