High-Resolution Ultrasonic Spectroscopy for Analysis of Industrial Emulsions and Suspensions

Smyth, Cormac; Kudryashov, Evgeny; O'Driscoll, Breda; Buckin, Vitaly

doi:10.1016/j.jala.2004.01.008

Cited by 7 publications

(4 citation statements)

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“…High-resolution ultrasound spectroscopy is a useful technique for the characterization of liquid and semi-solid samples in several fields related to material sciences such as food chemistry, agriculture, pharmaceutics and cosmetics [ 7 ]. Specifically, this technique has been employed for the investigation of structural and thermal properties of disperse systems such as micelles, emulsions, microemulsions and liposomes, providing reliable results, which can be considered as complementary to those collected by other more commonly employed techniques (e.g., calorimetry) [ 31 , 32 , 33 ]. These materials can be analysed as a function of concentration or temperature by applying high-intensity ultrasounds at low frequencies generated by a piezoelectric element that converts electricity into mechanical energy.…”

Section: Discussionmentioning

confidence: 99%

High-Resolution Ultrasound Spectroscopy for the Determination of Phospholipid Transitions in Liposomal Dispersions

et al. 2022

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High-resolution ultrasound spectroscopy (HR-US) is a spectroscopic technique using ultrasound waves at high frequencies to investigate the structural properties of dispersed materials. This technique is able to monitor the variation of ultrasound parameters (sound speed and attenuation) due to the interaction of ultrasound waves with samples as a function of temperature and concentration. Despite being employed for the characterization of several colloidal systems, there is a lack in the literature regarding the comparison between the potential of HR-US for the determination of phospholipid thermal transitions and that of other common techniques both for loaded or unloaded liposomes. Thermal transitions of liposomes composed of pure phospholipids (dimyristoylphosphatidylcholine, DMPC; dipalmitoylphosphatidylcholine, DPPC and distearoylphosphatidylcholine, DSPC), cholesterol and their mixtures were investigated by HR-US in comparison to the most commonly employed microcalorimetry (mDSC) and dynamic light scattering (DLS). Moreover, tramadol hydrochloride, caffeine or miconazole nitrate as model drugs were loaded in DPPC liposomes to study the effect of their incorporation on thermal properties of a phospholipid bilayer. HR-US provided the determination of phospholipid sol-gel transition temperatures from both attenuation and sound speed that are comparable to those calculated by mDSC and DLS techniques for all analysed liposomal dispersions, both loaded and unloaded. Therefore, HR-US is proposed here as an alternative technique to determine the transition temperature of phospholipid membrane in liposomes.

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Section: Discussionmentioning

confidence: 99%

High-Resolution Ultrasound Spectroscopy for the Determination of Phospholipid Transitions in Liposomal Dispersions

et al. 2022

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“…162 It enables determination of particle size, and the droplet concentrations. 180 It is more challenging to get accurate values for all the input data needed for an ultrasonic spectrometry than for SLS. 180 It allows the measurement of droplets diameters smaller than the one enabled by SLS, and higher droplet concentrations.…”

Section: Dynamic Light Scattering (Dls) Allows To Analyze Temporal Fl...mentioning

confidence: 99%

“…180 It is more challenging to get accurate values for all the input data needed for an ultrasonic spectrometry than for SLS. 180 It allows the measurement of droplets diameters smaller than the one enabled by SLS, and higher droplet concentrations. The laboratory must be equipped with an ultrasonic spectrometer.…”

Section: Dynamic Light Scattering (Dls) Allows To Analyze Temporal Fl...mentioning

confidence: 99%

Properties of Crude Oil-in-Water and Water-in-Crude Oil Emulsions: A Critical Review

Sousa

Matos

Pereira

2021

Ind. Eng. Chem. Res.

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Water and crude oil emulsions can be produced during oilfield operations. Since most oilfields are in the secondary or tertiary recovery stages, the amount of produced water is not negligible. Furthermore, enhanced oil recovery makes use of surfactants injection (chemical substances that lower the surface tension of the liquid) and polymer flooding (polymers are large molecules, composed of repeating blocks bounded together, which are injected to decrease the water–oil mobility ratio), leading to increased emulsion problems. Knowledge of fluid petrochemical properties and behavior is fundamental for designing the production system, transport infrastructures, and refinery layout. Depending on the fluid composition, the flow rate, and the PVT conditions, different physical behaviors and flow patterns will occur. Even though significant effort has been carried out to take a broader view of liquid–liquid models, there is a wide range of correlations to consider with different crude oil compositions and diverse field conditions. In this work, a critical review was carried out to assess the main principles that affect an emulsion, how the flow patterns are influenced by the water fraction, which equations can be used to estimate the main physical properties, and last what are the methods or techniques for identifying or characterizing an emulsion. As a result, a strong background in this matter is offered, and future research directions are synthesized.

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“…Therefore, HR-US is a very versatile method that can be used to analyze a broad range of molecular processes. Current applications of this technique include analysis of aggregation, micellization, and gelation phenomena, − phase diagrams of microemulsions, conformational transitions in polymers and biopolymers, interactions between polyelectrolytes and surfactants or amino acids, − stability of emulsions and suspensions, − polymer adsorption onto surfaces, enzymatic hydrolysis of proteins and carbohydrates, ,− and many others. Despite being employed for the characterization of numerous chemical and physical processes, there is a lack in the literature regarding the potential use of HR-US for studying the formation of polyelectrolyte complexes.…”

Section: Introductionmentioning

confidence: 99%

High-Resolution Ultrasonic Spectroscopy: Looking at the Interpolyelectrolyte Neutralization from a Different Perspective

et al. 2023

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In this study, the high-resolution ultrasonic spectroscopy (HR-US) technique was applied to examine interpolyelectrolyte neutralization. The mentioned method was tested on the example of complexation between poly(allylammonium) cations and poly(acrylate) anions in aqueous solutions at pH = 7. It was confirmed by HR-US that the type of titration (stepwise or abrupt), the direction of titration, and the type of background salt affect the outcome of interpolyelectrolyte neutralization. The obtained results were explained on the basis of ultrasonic velocity and attenuation changes in the context of suspension compressibility, a parameter that is extremely sensitive to molecular organization and intermolecular interactions. Moreover, the results of HR-US measurements proved to be consistent with previous results obtained by more traditional methods such as dynamic light scattering, microcalorimetry, and electrokinetics. This research demonstrates that HR-US is a convenient and reliable method that can be employed for the investigation of interpolyelectrolyte neutralization and polyelectrolyte-related processes.

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High-Resolution Ultrasonic Spectroscopy for Analysis of Industrial Emulsions and Suspensions

Cited by 7 publications

References 0 publications

High-Resolution Ultrasound Spectroscopy for the Determination of Phospholipid Transitions in Liposomal Dispersions

High-Resolution Ultrasound Spectroscopy for the Determination of Phospholipid Transitions in Liposomal Dispersions

Properties of Crude Oil-in-Water and Water-in-Crude Oil Emulsions: A Critical Review

High-Resolution Ultrasonic Spectroscopy: Looking at the Interpolyelectrolyte Neutralization from a Different Perspective

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