Colloidal Stability of Polymer Colloids with Different Interfacial Properties: Mechanisms

Ortega-Vinuesa, J.L.; Martín-Rodríguez, Agustín; Hidalgo‐Álvarez, R.

doi:10.1006/jcis.1996.0619

Cited by 109 publications

(98 citation statements)

References 7 publications

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“…Spielman 7) , and Vinuesa et al 8) discussed the stability factor by considering the frictional force and suggested the importance of the effect of the frictional factor on the dispersion stability. Therefore, the frictional force should play an important role in the dispersion stability of emulsions.…”

mentioning

confidence: 99%

Effect of oil droplet size on activation energy for coalescence of oil droplets in an O/W emulsion

Miyagawa

Katsuki

Matsuno

et al. 2015

Bioscience, Biotechnology, and Biochemistry

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confidence: 99%

Effect of oil droplet size on activation energy for coalescence of oil droplets in an O/W emulsion

Miyagawa

Katsuki

Matsuno

et al. 2015

Bioscience, Biotechnology, and Biochemistry

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“…, 1×10 −20 and 1×10 −19 J. 20,23,27) Further, a mean distance between the surfaces of two particles h is given as shown in Fig. 18.…”

Section: Discussionmentioning

confidence: 99%

“…17. Some researchers have reported that polystyrene particle has the surface potential ψ of tens of millivolts [21][22][23] and the Hamaker constant A of about 1×10 −21 J. 23) For polystyrene, we pay attention to the curves (i) and (ii) in On the other hand, in the case of silica, it is known that the surface potential is several millivolts [24][25][26] Fig.…”

Section: Discussionmentioning

confidence: 99%

Flow of Dilute Colloidal Dispersions in Water through a Small Orifice

Toga

Hasegawa

Narumi

2007

J. Soc. Rheol., Jpn

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Fluctuation of flows through a small orifice has been measured for water and two kinds of colloidal dispersions including fine particles about 100 nm in diameter with 1 % volume fraction in water. In this volume fraction, a surface potential of the particles is composed of an electrostatic repulsion and a van der Waals attraction and it affects flow properties. Experiments clarify that a specific flow instability occurs for water at the Reynolds number about 60, and the dispersion of polystyrene particles having strong repulsion increases the specific flow instability in low salt concentrations(LSC) but makes it disappear in high salt concentrations(HSC). Meanwhile, it is found that the dispersion of silica particles having strong attraction is stable in flows except the specific flow instability in LSC but it suppresses the specific flow instability in HSC as in the case of polystyrene particles. Criterion whether the orifice flow is stable or not is predicted by comparison of the second minimum location of the surface potential and the mean surfaces distance of the particles.

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“…It is normally assumed that ψ and ζ are similar, in particular at low ζ values [31]. Based on the DLVO theory, colloidal suspensions are predicted to be more stable with increased values of calculated interaction energies [32]. Colloidal size distribution in bulk suspensions measured using the CPS Disc…”

Section: Dlvo Theory Calculationsmentioning

confidence: 99%

Sodium meta-autunite colloids: Synthesis, characterization, and stability

Zheng

Wan

Song

et al. 2006

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Waste forms of U such as those in the United States Department of Energy's Hanford Site often contain high concentrations of Na and P. Low solubility sodium uranyl phosphates such as sodium meta-autunite have the potential to form mobile colloids that can facilitate transport of this radionuclide. In order to understand the geochemical behavior of uranyl phosphate colloids, we synthesized sodium meta-autunite colloids, and characterized their morphology, chemical composition, structure, dehydration, and surface charge. The stability of these synthetic plate-shaped colloids was tested with respect to time and pH. The highest aggregation rate was observed at pH 3, and the rate decreases as pH increases, indicating that higher stability of colloid dispersion under neutral and alkaline pH conditions. The synthetic colloids are all negatively charged and no isoelectric points were found over a pH range of 3 to 9. The zeta-potentials of the colloids in the phosphate solution show a strong pH-dependence in the more acidic range over time, but are relatively constant in the neutral and alkaline pH range. The geochemical behavior of the synthetic colloids can be interpreted using DLVO theory.The results suggest that formation of mobile sodium meta-autunite colloids can enhance the transport of U in some contaminated sediments.

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Colloidal Stability of Polymer Colloids with Different Interfacial Properties: Mechanisms

Cited by 109 publications

References 7 publications

Effect of oil droplet size on activation energy for coalescence of oil droplets in an O/W emulsion

Effect of oil droplet size on activation energy for coalescence of oil droplets in an O/W emulsion

Flow of Dilute Colloidal Dispersions in Water through a Small Orifice

Sodium meta-autunite colloids: Synthesis, characterization, and stability

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