Ultrasound assisted preparation of emulsion of coconut oil in water: Understanding the effect of operating parameters and comparison of reactor designs

Ramisetty, Kiran A.; Pandit, Aniruddha B.; Gogate, Parag R.

doi:10.1016/j.cep.2014.12.006

Cited by 78 publications

(38 citation statements)

References 20 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reduced effectiveness at low energy density and high oil phase volume is consistent with 370 observations of conventional ultrasonic emulsification as reported by Ramisetty, Pandit, and 371 Gogate (2015). It can be explained by the fact that the applied energy becomes more 372 dispersed/distributed among a larger oil volume, resulting in less size disruption per 373 volume/mass.…”

supporting

confidence: 72%

Preparation of water-in-oil-in-water emulsions by low frequency ultrasound using skim milk and sunflower oil

et al. 2017

View full text Add to dashboard Cite

15Double emulsions of water-in-oil-in-water (W1/O/W2) type were prepared in skim milk using 16 20 kHz ultrasound. Ultrasonic emulsification provides a simple and quick yet effective protocol 17 by which double emulsions can be created using low amounts of surfactant. The fat 18 displacement and shelf stability of the emulsions were found to be dependent on the amount of 19 sonication power delivered during the dispersion of the W1/O emulsion into skim milk. 20 Acoustic intensity was manipulated to control the size distribution of the outer shell of the 21 emulsion droplets to a range similar to that of fat globules in unhomogenized whole milk. The 22 encapsulation yield (proportion of W1/O droplets subsequently encapsulated within the 23 W1/O/W2 double emulsion) varied from 5 to 35 %. The variation could be due to 24 coalescence/aggregation of water phase droplets within the initially formed W1/O emulsion. 25 The resultant double emulsion droplets were found to be relatively stable over 7 days.26

show abstract

supporting

confidence: 72%

Preparation of water-in-oil-in-water emulsions by low frequency ultrasound using skim milk and sunflower oil

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The cycle or pulse mode indicates the power discharge: continuously for 1 or interrupted for 0.5 and 0.75 (power discharge for 0.75 seconds, followed by 0.25 seconds pause). The interrupted application of ultrasounds proved to be effective in emulsification processes, so the same technique was tested with the nanocrystal formation [ 15 ].…”

Section: Discussionmentioning

confidence: 99%

“…Other researchers reported sonication at 30 to 70% amplitude, which resulted in the decrease of crystal size and increase in temperature [ 7 , 15 ]. They had to limit the amplitude values so that the produced heat would not determine the melting of the active principles.…”

Section: Discussionmentioning

confidence: 99%

Optimization of the sonication process for meloxicam nanocrystals preparation

Iurian

Tomuță

Rus

et al. 2015

Medicine and Pharmacy Reports

View full text Add to dashboard Cite

Background and aimsMeloxicam, a widely recommended AINS, presents poor water solubility, which limits its bioavailability and effect onset. The objective of this study is the investigation of the most important factors that influence the efficiency of sonication in the preparation of meloxicam nanocrystals.MethodsThe effects of crucial technological sonication parameters (amplitude, time and applied cycle) on the crystal sizes and dissolution were investigated using a central composite experimental design with three factors and three levels. Different mathematical models were applied for the evaluation of the influence of each factor on the measured responses.ResultsThe amplitude and the time were found as the most important variables. Their increase determined significant size reduction and homogeneity due to cavitation phenomenon, while the applied cycle was less important. The crystal size greatly influenced dissolution; a strong correlation was noted between small crystals and fast dissolution after freeze-drying the nanosuspensions. The optimal formulation was obtained by sonication at 100% amplitude, for 45 minutes and cycle 1, conditions which led to 600 nm crystals with 0.521 polydispersion index. The morphological analysis revealed small, round-shaped crystals with narrow size distribution.ConclusionsThe results provided the optimal sonication conditions needed to obtain meloxicam nanosuspensions with high drug dissolution capacity.

show abstract

“…[31] In the literature, the most commonly used processes are mechanical stirring, ultrasonication and high pressure homogenization. Homogenization by ultrasound has been highlighted in food emulsion research [15,[32][33][34][35] and results showed to be an efficient method for obtaining emulsions with droplet size in micrometers or nanometers. The ultrasound homogenization mechanism is based on cavitation, in which high intensity ultrasound waves impact the liquid surface, forming high velocity jets, and are responsible for the droplet formation.…”

Section: Introductionmentioning

confidence: 99%

Stability of lime essential oil emulsion prepared using biopolymers and ultrasound treatment

Campelo

Junqueira

Resende

et al. 2017

International Journal of Food Properties

View full text Add to dashboard Cite

The objective of this study was to investigate the kinetic stability of lime essential oil emulsion using gum arabic (GA) and whey protein isolate (WPI) biopolymers as emulsifiers and stabilizers. Different solid compositions were evaluated: GA, GA/WPI (1:1) and WPI, as well as oil concentration (5.0, 7.5 and 10% w/w). Emulsions were prepared using an ultrasonic homogenizer. Viscosity, oil droplet size, zeta potential, pH and conductivity were measured to predict the emulsion stability over a period of 4 h (estimated time until complete drying in microencapsulation processes). Emulsion rheological behaviour and microstructure were characterized. All emulsions were stable during the time period analysed, and no destabilization characteristic was observed. The pH, conductivity and viscosity showed no significant difference (p > 0.05) over the 4-h period. Emulsions with WPI showed higher zeta potential values, confirming the biopolymer electrosteric stabilization. The combination of wall materials (GA/WPI) and the oil concentration increased the average droplet size. The results of the apparent viscosity at shear rate of 100 s −1 confirmed the emulsions stability. These values did not change significantly considering the fresh emulsions and emulsions after 4 h of preparation. The emulsifying biopolymers showed to be excellent natural stabilizers for lime essential oil emulsions, highlighting the results using WPI.

show abstract

Ultrasound assisted preparation of emulsion of coconut oil in water: Understanding the effect of operating parameters and comparison of reactor designs

Cited by 78 publications

References 20 publications

Preparation of water-in-oil-in-water emulsions by low frequency ultrasound using skim milk and sunflower oil

Preparation of water-in-oil-in-water emulsions by low frequency ultrasound using skim milk and sunflower oil

Optimization of the sonication process for meloxicam nanocrystals preparation

Stability of lime essential oil emulsion prepared using biopolymers and ultrasound treatment

Contact Info

Product

Resources

About