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A Package of Established Analytical Tools to Investigate the Solid-State Alteration of Lipid-Based Excipients
Published on: August 9, 2022
Solid-liquid interfacial energy of neopentylglycol
Y Ocak1, S Akbulut, K Keşlioğlu
1Faculty of Arts and Sciences, Department of Physics, Erciyes University, 38039 Kayseri, Turkey.
Journal of Colloid and Interface Science
|February 12, 2008
Summary
Researchers measured neopentylglycol (NPG) properties using a horizontal temperature gradient. Key findings include interfacial and grain boundary energies, crucial for understanding NPG
Area of Science:
- Materials Science
- Physical Chemistry
Background:
- Understanding the properties of organic solids like neopentylglycol (NPG) is essential for various applications.
- Grain boundaries and solid-liquid interfaces significantly influence material behavior.
Purpose of the Study:
- To directly observe grain boundary groove shapes in equilibrated solid neopentylglycol (NPG) with its melt.
- To determine key thermodynamic and physical properties of NPG from these observations.
Main Methods:
- Utilized a horizontal temperature gradient stage for direct observation of grain boundary groove shapes.
- Analyzed groove morphology to calculate Gibbs-Thomson coefficient, solid-liquid interfacial energy, and grain boundary energy.
- Measured the ratio of thermal conductivity between the liquid and solid phases of NPG.
Main Results:
- Determined the Gibbs-Thomson coefficient (Gamma) of NPG to be (7.4+/-0.7)x10(-8) Km.
- Quantified the solid-liquid interfacial energy (sigma(SL)) as (7.9+/-1.2)x10(-3) Jm(-2).
- Calculated the grain boundary energy (sigma(gb)) to be (15.4+/-2.5)x10(-3) Jm(-2).
- Measured the ratio of thermal conductivity (liquid/solid) for NPG as 1.07 at its melting temperature.
Conclusions:
- The study successfully determined critical interfacial and thermodynamic properties of neopentylglycol.
- These quantified values provide valuable data for materials science and physical chemistry research involving NPG.
- The findings contribute to a deeper understanding of phase transitions and interface phenomena in organic materials.
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