The Role of Oil Phase in the Stability and Physicochemical Properties of Oil-in-Water Emulsions in the Presence of Gum Tragacanth

Khadije Abdolmaleki, Mohammad Amin Mohammadifar, Zhian Sheikhi, Golshan Matinfar, Kooshan Nayebzadeh*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Different emulsions based on six types of vegetable oils (sunflower, canola, sesame, olive, coconut, and palm olein) were studied to investigate the role of the oil phase in the stability and physicochemical characteristics of oil-in-water emulsions prepared with gum tragacanth. The results indicated that the stability, rheological parameters, and size distribution of emulsions were dependent on the oil type. Based on the interfacial tension value, the type of oil did not have a significant effect on the gum tragacanth-emulsifying properties. The formulation based on sunflower and coconut oil led to producing more stable emulsion and a sample containing palm olein resulted in an unstable emulsion. Rheological analysis revealed that the sample based on palm olein showed the lowest consistency coefficient (2.10 ± 0.05 Pasn), elastic modulus (3.90 ± 0.21 Pa), and energy of cohesion (80.87 ± 1.1 J m−3). This study revealed that using oils with lower viscosity and higher density led to the higher stability of the emulsion samples.
Original languageEnglish
JournalJAOCS, Journal of the American Oil Chemists' Society
Volume96
Issue number7
Pages (from-to)795-803
Number of pages9
ISSN0003-021X
DOIs
Publication statusPublished - 2019

Keywords

  • Emulsion stability
  • Gum tragacanth
  • Rheological properties

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