A zeta potential and rheology study using electroacoustic spectroscopy on aqueous boron carbide suspensions

Dawes, Maxwell; Blackburn, S.; Greenwood, R.; Charles, S.

doi:10.1016/j.ceramint.2018.07.079

Cited by 14 publications

(8 citation statements)

References 19 publications

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“…[ 30 ] Protein research [ 25 ] explores the rheological behaviour of materials with this technique. [ 31,32 ]…”

Section: Descriptionmentioning

confidence: 99%

“…[30] Protein research [25] explores the rheological behaviour of materials with this technique. [31,32] This paper concentrates on the electrophoretic light dispersion technique. In capillary cells, a laser beam passing through a sample charge the particle and they move at a frequency, f, depending on the laser wavelength, λ, and the scattering angle, θ:…”

Section: Introductionmentioning

confidence: 99%

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Experimental methods in chemical engineering: Zeta potential

et al. 2021

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Zeta potential (ZP) is a parameter that expresses the electrochemical equilibrium between particles and liquids like in nanoparticle (NP) colloidal solutions with applications in medicine, pharmaceuticals, chemical production, mineral processing, and water and soil purification. Smoluchowski's theory applies to the ZP particles that are larger the interfacial layer but neglects surface conductivity. The Debye-Hückel theory correctly approximates the concentration of ions in a double layer but fails to account for the dependence of ZP on the concentration of counterions. Determining ZP of NPs is essential to proper NP characterization. For instance, developing well-defined therapeutic-relevant nanoformulations needs information on NPs size, surface charge, stability and agglomeration behaviour. This approach has many practical challenges, from inadequate knowledge of operating standards to sampling, data interpretation and good laboratory practice for the experiments replicability. However, in drug delivery research, very little literature can provide a clear, succinct explanation of these techniques. Looking for specific guidelines to overcome frequently encountered problems during ZP measurements. This article explores factors influencing colloidal particle stability. Measurement criteria such as applied voltage, number of measurements, electrophoretic mobility (EPM), size distribution, surface shape, temperature, viscosity, particle concentration, zeta potential, nanoparticles, colloidal suspension, electrophoretic mobility, and pH.

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“…[ 30 ] Protein research [ 25 ] explores the rheological behaviour of materials with this technique. [ 31,32 ]…”

Section: Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental methods in chemical engineering: Zeta potential

et al. 2021

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“…Compared with control emulsion samples, the f-potential of HSE US , HSE LUHS29 , HSE LUHS183 , HSE LUHS210 and HSE LUHS245 samples was lower by 14.2%, 14.0%, 14.3%, 19.4% and 30.4%, respectively. f-potential allows determination of the electric charge distribution surrounding particles in a suspension (Dawes et al, 2018). High values of squared f-potential correlate directly to the magnitude of electrostatic repulsion, with values of f 2 greater than 625 mV 2 (f < À25 mV or f > 25 mV) generally being regarded as indicating high colloidal stability (Salopek et al,…”

Section: Stability Characteristics Of the Prepared Emulsionsmentioning

confidence: 99%

Technology and characterisation of whole hemp seed beverages prepared from ultrasonicated and fermented whole seed paste

Bartkienė

Zokaitytė

Lėlė

et al. 2019

Int J of Food Sci Tech

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The aim of this study was to apply fermentation with Pediococcus acidilactici LUHS29, P. pentosaceus LUHS183, Lactobacillus casei LUHS210 and L. uvarum LUHS245 strains, as well as ultrasonication (US) for whole hemp (Cannabis sativa L.) seed paste (HSP) treatment and preparation of emulsions (HSE). Additionally, the biogenic amine (BA) content and antimicrobial properties of the prepared products were evaluated. It was found that US and fermentation reduced total bacteria count in HSP. The highest BA content was found in US-treated HSP (639.87 mg kg À1). HSE US , HSE LUHS29 , HSE LUHS183 , HSE LUHS210 and HSE LUHS245 samples showed lower f-potential. The highest overall acceptability (OA) was established for HSE LUHS245 , and correlations were established between the emotions induced by the different HSE products and OA. Pure LAB showed a broad variety of pathogen inhibition; however, the antimicrobial activity of HSP was very low, and HSE did not show any antimicrobial properties. Finally, treatment with selected LAB can be recommended for preparation of stable emulsions, and the most acceptable beverages can be obtained by using LUHS245 strain.

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“…13 It can be seen from Figure 1b that the characteristic peak of SiO 2 (1050 cm −1 ) disappears after HF etching, indicating that SiO 2 on the surface of SiC powder reacts with HF. [20][21][22] It can be seen from the zeta potential analysis that the removal of impure ions by pickling and HF etching SiO 2 , followed by calcination to form a new SiO 2 layer, is advantageous for the dispersion of SiC particles. 18,19 It can be seen from Figure 2 SEM pictures that after 2.0% HCl washing (Figure 2A), 20% HF etching ( Figure 2B), and 750°C calcination treatment ( Figure 2C), the particle size and morphology of SiC powder did not change greatly, and all of them showed irregular sheet or block structure.…”

Section: Impure Ion Analysismentioning

confidence: 99%

“…The absolute value of zeta potential reached a maximum value of 75.1 mV at pH = 11.0, indicating that the powder was easily dispersed. [20][21][22] It can be seen from the zeta potential analysis that the removal of impure ions by pickling and HF etching SiO 2 , followed by calcination to form a new SiO 2 layer, is advantageous for the dispersion of SiC particles. Therefore, the influence of SiO 2 layer on the SiC surface was further studied by the rheology.…”

Section: Almentioning

confidence: 99%

Influence of surface oxide layer of SiC powder on the rheological properties of its slurry

Gao

Wang

Zhao

et al. 2019

Int J Applied Ceramic Tech

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In this paper, the influence of surface oxide layer of SiC powder on the rheological behavior of its slurry was studied by acid washing, HF etching, and calcination oxidation processes. Zeta potential, particle size, inductively coupled plasma atomic emission spectrometry (ICP‐AES), energy dispersive X‐ray spectroscopy, and viscosity tests indicated the main factor that resulted in high viscosity of slurry is impure ions existing either on the powder surface or in the water phase, rather than the surface oxide layer. After the impure ions are removed, the surface oxide layer formed at a calcination temperature range of 400°C‐750°C does not cause an increase in the slurry viscosity, but contributes to an improvement in the rheological properties of SiC slurry.

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A zeta potential and rheology study using electroacoustic spectroscopy on aqueous boron carbide suspensions

Cited by 14 publications

References 19 publications

Experimental methods in chemical engineering: Zeta potential

Experimental methods in chemical engineering: Zeta potential

Technology and characterisation of whole hemp seed beverages prepared from ultrasonicated and fermented whole seed paste

Influence of surface oxide layer of SiC powder on the rheological properties of its slurry

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