Dissolution of coated microbubbles: The effect of nanoparticles and surfactant concentration

Azmin, Mehrdad; Mohamedi, Graciela; Edirisinghe, Mohan; Stride, Eleanor

doi:10.1016/j.msec.2012.06.019

Cited by 41 publications

(27 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was not possible to quantify precisely the surface coverage from the optical microscopy images however, nor to confirm whether the particles form multilayers. The stability imparted by the clay particles can be attributed to a reduction in the gas-liquid interfacial area available for diffusion 29 , a reduction in Laplace pressure 30,31 , the elasticity of the particle monolayer 32 or a combination of these effects. Stability of clay-coated bubbles in alkanes upon heating.…”

Section: Resultsmentioning

confidence: 99%

Stability of Clay Particle-Coated Microbubbles in Alkanes against Dissolution Induced by Heating

et al. 2017

View full text Add to dashboard Cite

We investigated the dissolution and morphological dynamics of air bubbles in alkanes stabilized by fluorinated colloidal clay particles when subjected to temperature changes. A model for bubble dissolution with time-dependent temperature reveals that increasing the temperature enhances the bubble dissolution rate in alkanes, opposite to the behavior in water, due to the differing trends in gas solubility. Experimental results for uncoated air bubbles in decane and hexadecane confirm this prediction. Clay-coated bubbles in decane and hexadecane are shown to be stable in air-saturated oil at constant temperature, where dissolution is driven mainly by the Laplace pressure. When the temperature increases from ambient, the particle-coated bubbles are prone to dissolution as the oil phase becomes under-saturated. The interfacial layer of particles is observed to undergo buckling and crumpling, without shedding of clay particles. Increasing the concentration of particles is shown to enhance the bubble stability by providing a higher resistance to dissolution. When subjected to complex temperature cycles, for which the effect of the time-dependent temperature is dominant, the clay-coated bubbles can resist long-term dissolution in conditions for which uncoated bubbles dissolve completely. These results underpin the design of ultra-stable oil foams stabilized by solid particles with improved shelf life under changing environmental conditions. † These authors contributed equally 2/21

show abstract

Section: Resultsmentioning

confidence: 99%

Stability of Clay Particle-Coated Microbubbles in Alkanes against Dissolution Induced by Heating

et al. 2017

View full text Add to dashboard Cite

show abstract

“…It is reported that this UFB exists stably for over 1 month [1]. However, the mechanism by which UFB stabilizes in the water remains to be unknown, and several theories have been proposed [1][2][3][4][5][6][7][8][9][10], but a clear mechanism has not yet been established in reality.…”

Section: Introductionmentioning

confidence: 98%

Study of Ultrafine Bubble Stabilization by Organic Material Adhesion

Sugano

Miyoshi

Inazato

2017

JAPANESE JOURNAL OF MULTIPHASE FLOW

View full text Add to dashboard Cite

We confirmed the effect of organic material adhesion as ultrafine bubble (UFB) stabilization mechanism. Organic material was added to generate UFB, and the state of UFB particles was investigated by dynamic light scattering method, transmission electron microscope (TEM), resonance mass measurement method. Disappearance of UFB was suppressed by the addition of organic material, and it was confirmed that the organic material adhered to the surface of UFB. We got the conclusion that adhesion of organic material inhibit gas dissolution from bubbles.

show abstract

“…18,19 A theoretical model has therefore been derived to describe the effects of the nanoparticles on the interfacial diffusivity and surface tension. 20 The aim of the present study was to compare the predictions of the model with experimental results and thereby investigate the use of nanoparticles as a complementary and/or alternative strategy for bubble stabilization.…”

Section: Introductionmentioning

confidence: 99%

Effects of Gold Nanoparticles on the Stability of Microbubbles

et al. 2012

View full text Add to dashboard Cite

Surfactant-coated microbubbles are utilized in a wide variety of applications, from wastewater purification to contrast agents in medical ultrasound imaging. In many of these applications, the stability of the microbubbles is crucial to their effectiveness. Controlling this, however, represents a considerable challenge. In this study, the potential for stabilizing microbubbles using solid nanoparticles adsorbed onto their surfaces was explored. A new theoretical model has been developed to describe the influence of interfacially adsorbed solid particles upon the dissolution of a gas bubble in a liquid. The aim of this work was to test experimentally the prediction of the model that the presence of the nanoparticles would inhibit gas diffusion and coalescence/disproportionation, thus increasing the life span of the bubbles. Near-monodisperse microbubbles (~100 μm diameter) were prepared using a microfluidic device and coated with a surfactant, with and without the addition of a suspension of spherical gold nanoparticles (~15 nm diameter). The experimental results confirmed the theoretical predictions that as the surface concentration of gold nanoparticles increased the bubbles underwent negligible changes in their size and size distribution over a period of 30 days at the ambient temperature and pressure. Under the same conditions, bubbles coated with the same surfactant but no nanoparticles survived only a matter of hours.

show abstract

Dissolution of coated microbubbles: The effect of nanoparticles and surfactant concentration

Cited by 41 publications

References 17 publications

Stability of Clay Particle-Coated Microbubbles in Alkanes against Dissolution Induced by Heating

Stability of Clay Particle-Coated Microbubbles in Alkanes against Dissolution Induced by Heating

Study of Ultrafine Bubble Stabilization by Organic Material Adhesion

Effects of Gold Nanoparticles on the Stability of Microbubbles

Contact Info

Product

Resources

About