Effect of Degassing on the Formation and Stability of Surfactant-Free Emulsions and Fine Teflon Dispersions
作者： R. M. Pashley
DOI: 10.1021/JP026744B
关键词: Dispersion (chemistry) 、 Surface-active agents 、 Oil droplet 、 Chemical engineering 、 Surfactant free 、 Chemistry 、 Organic chemistry 、 Hydrocarbon 、 Oil in water
摘要: The results reported here demonstrate that the formation of surfactant-free, oil-in-water emulsions is significantly enhanced by almost complete removal dissolved gases. However, in an apparent contradiction, reintroduction gases does not destabilize already formed emulsions. Removal enables much more turbid and stable hydrocarbon oil water emulsions, which can be further studied without effects various additives, often needed as stabilizers. observations suggest dispersion droplets opposed attractive, hydrophobic force, dependent on presence gas. once formed, stability appeared to unaffected any attractive either gassed or degassed conditions. Degassing was also found enhance fine Teflon particles water.
acs.org
sci-hub.se 参考文章(15)
David C Diamond, Bradford A Jameson, Jutta Bonin, Michinori Kohara, Shinobu Abe, Heihachi Itoh, Toshihiko Komatsu, Mineo Arita, Shusuke Kuge, Akio Nomoto, ADME Osterhaus, Radu Crainic, Eckard Wimmer, Antigenic variation and resistance to neutralization in poliovirus type 1 Science. ,vol. 229, pp. 1090- 1093 ,(1985) , 10.1126/SCIENCE.2412292
Joseph S D'Arrigo, Toyoko Imae, Physical characteristics of ultrastable lipid-coated microbubbles joint international conference on information sciences. ,vol. 149, pp. 592- 595 ,(1992) , 10.1016/0021-9797(92)90447-T
Mikael Alfridsson, Barry Ninham, Staffan Wall, Role of Co-Ion Specificity and Dissolved Atmospheric Gas in Colloid Interaction Langmuir. ,vol. 16, pp. 10087- 10091 ,(2000) , 10.1021/LA000841J
H. K. CHRISTENSON, P. M. CLAESSON, Cavitation and the Interaction Between Macroscopic Hydrophobic Surfaces Science. ,vol. 239, pp. 390- 392 ,(1988) , 10.1126/SCIENCE.239.4838.390
Naoyuki Ishida, Masanobu Sakamoto, Minoru Miyahara, Ko Higashitani, Attraction between hydrophobic surfaces with and without gas phase Langmuir. ,vol. 16, pp. 5681- 5687 ,(2000) , 10.1021/LA991146I
R. F. Considine, R. A. Hayes, R. G. Horn, Forces Measured between Latex Spheres in Aqueous Electrolyte: Non-DLVO Behavior and Sensitivity to Dissolved Gas Langmuir. ,vol. 15, pp. 1657- 1659 ,(1999) , 10.1021/LA980900H
Toshio Sakai, Keiji Kamogawa, Fuminori Harusawa, Nobuyuki Momozawa, Hideki Sakai, Masahiko Abe, Direct Observation of Flocculation/Coalescence of Metastable Oil Droplets in Surfactant-free Oil/Water Emulsion by Freeze-Fracture Electron Microscopy Langmuir. ,vol. 17, pp. 255- 259 ,(2001) , 10.1021/LA000917B
R. Pashley, P. McGuiggan, B. Ninham, D. Evans, Attractive forces between uncharged hydrophobic surfaces: direct measurements in aqueous solution. Science. ,vol. 229, pp. 1088- 1089 ,(1985) , 10.1126/SCIENCE.4035349
R. G. Alargova, I. I. Kochijashky, R. Zana, Fluorescence Study of the Aggregation Behavior of Different Surfactants in Aqueous Solutions in the Presence and in the Absence of Gas Langmuir. ,vol. 14, pp. 1575- 1579 ,(1998) , 10.1021/LA971008Y
Jacob Israelachvili, Richard Pashley, The hydrophobic interaction is long range, decaying exponentially with distance Nature. ,vol. 300, pp. 341- 342 ,(1982) , 10.1038/300341A0