Impact of fat crystallization on the resistance of W/O/W emulsions to osmotic stress: Potential for temperature-triggered release

Food Research International
Jinning LiuD Julian McClements

Abstract

Water-in-oil-in-water (W/O/W) emulsions can be designed to encapsulate, protect, and release both hydrophilic and hydrophobic functional compounds. In this study, we examined the impact of crystallizing the fat phase on the resistance of W/O/W emulsions to osmotic stress, with the aim of developing osmotic-responsive systems. Polyglycerol polyricinoleate (PGPR) was used as a hydrophobic surfactant to stabilize the inner water droplets, while Quillaja saponin and whey protein isolate (WPI) were used as hydrophilic surfactants to coat the oil droplets. The impact of fat crystallization was examined by using either a liquid (soybean oil, SO) or semi-solid (hydrogenated soybean oil, HSO) fat as the oil phase. An osmotic stress was generated by establishing a sucrose concentration gradient between the internal and external water phases. Alterations in the droplet size, morphology, and stability of the W/O/W emulsions was measured when the sucrose concentration gradient was changed. The W/O droplets in the SO-emulsions swelled/shrank when the external sucrose concentration was below/above the internal sucrose concentration, which is indicative of water diffusing into/out of the droplets. Conversely, there was no change in the size of...Continue Reading

References

May 7, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Raffaele MezzengaEric Hughes
Nov 18, 2005·Journal of Colloid and Interface Science·Jim JiaoDiane J Burgess
Nov 28, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Herzi SamehLeal-Calderon Fernando
Mar 11, 2015·Journal of the Science of Food and Agriculture·María FreireFrancisco Jiménez-Colmenero
Mar 28, 2018·Food Research International·Viktorija EisinaiteDaiva Leskauskaite
Jan 24, 2019·Magnetic Resonance in Chemistry : MRC·Veronique NelisPaul Van der Meeren
Nov 17, 2019·Food Research International·Mahesh Kharat, David Julian McClements

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Citations

Jan 14, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Anna Molet-RodríguezLaura Salvia-Trujillo
Jul 22, 2021·Gels·Tiago C PintoMiguel A Cerqueira

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