Surfactant-free "Emulsions" generated by freeze-thaw

被引：31

作者：

Burnett, GR ^{[1
]}

Atkin, R ^{[1
]}

Hicks, S ^{[1
]}

Eastoe, J ^{[1
]}

机构：

[1] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England

来源：

LANGMUIR | 2004年 / 20卷 / 14期

关键词：

D O I：

10.1021/la049923o

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The stability of surfactantless dispersions of surface chemically pure alkanes was studied in the presence and absence of dissolved gas. It was found that simply freezing and thawing a sample of oil and water results in a dispersion. A mechanism based on fingering of the insoluble oil into the aqueous phase, due to local surface tension gradients, followed by separation and nucleation into droplets, is proposed to account for this observation.

引用

页码：5673 / 5678

页数：6

共 21 条

[1] Fluorescence study of the aggregation behavior of different surfactants in aqueous solutions in the presence and in the absence of gas [J].

Alargova, RG ;

Kochijashky, II ;

Zana, R .

LANGMUIR, 1998, 14 (07) :1575-1579

[2] Role of Co-Ion specificity and dissolved atmospheric gas in colloid interaction [J].

Alfridsson, M ;

Ninham, B ;

Wall, S .

LANGMUIR, 2000, 16 (26) :10087-10091

[3] SPONTANEOUS EMULSIFICATION IN OIL-WATER-SURFACTANT SYSTEMS [J].

BENTON, WJ ;

MILLER, CA ;

FORT, T .

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, 1982, 3 (01) :1-44

[4] Forces measured between latex spheres in aqueous electrolyte: Non-DLVO behavior and sensitivity to dissolved gas [J].

Considine, RF ;

Hayes, RA ;

Horn, RG .

LANGMUIR, 1999, 15 (05) :1657-1659

[5] THE EFFECT OF ELECTROLYTES ON BUBBLE COALESCENCE IN WATER [J].

CRAIG, VSJ ;

NINHAM, BW ;

PASHLEY, RM .

JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (39) :10192-10197

[6] Direct measurement of hydrophobic forces: A study of dissolved gas, approach rate, and neutron irradiation [J].

Craig, VSJ ;

Ninham, BW ;

Pashley, RM .

LANGMUIR, 1999, 15 (04) :1562-1569

[7] Interfacial tension of the water/n-alkane interface [J].

Goebel, A ;

Lunkenheimer, K .

LANGMUIR, 1997, 13 (02) :369-372

[8]

GROVES M, 1978, J CHEM IND, P417

[9]

Hunter R. J., 1985, FDN COLLOID SCI

[10] Attraction between hydrophobic surfaces with and without gas phase [J].

Ishida, N ;

Sakamoto, M ;

Miyahara, M ;

Higashitani, K .

LANGMUIR, 2000, 16 (13) :5681-5687

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