The Film Formation Mechanism of High Water-Based Emulsions

2010 ◽  
Author(s):  
Jianbin Luo ◽  
Liran Ma
Keyword(s):  
Formation Mechanism ◽  
Film Formation ◽  
High Water ◽  
Metal Working ◽  
Water Emulsion ◽  
Volume Percentage ◽  
Oil In Water ◽  
Oil Concentration ◽  
Oil In Water Emulsion ◽  
Film Formation Mechanism

The oil-in-water emulsion has been widely used as lubricant in metal working such as metal rolling and cutting. The film formation ability of emulsion was considered as an important factor for evaluating the lubricating effectiveness. Although the film formation characteristics have been widely investigated, the mechanism is still not well understood. Furthermore there were seldom results reported on the emulsion with an oil volume percentage less than 1%. The film formation characteristic of emulsions with ultra-low oil concentration (0.005vol%) between a smooth plate and a highly polished steel ball was investigated. The effects of oil concentration and emulsifier concentration were investigated. New viewpoints on the film formation mechanism of emulsion were proposed.

scholarly journals Experimental insight into the chemical corrosion mechanism of copper with an oil-in-water emulsion solution

RSC Advances ◽  
2018 ◽  
Vol 8 (18) ◽  
pp. 9833-9840 ◽  
Author(s):  
Xudong Yan ◽  
Jianlin Sun ◽  
Yanan Meng
Keyword(s):  
Corrosion Mechanism ◽  
Metal Working ◽  
Working Process ◽  
Water Emulsion ◽  
Chemical Corrosion ◽  
Oil In Water ◽  
Copper Storage ◽  
Oil In Water Emulsion ◽  
Insight Into

Chemical corrosion mechanism of copper in an oil-in-water (O/W) emulsion is worthy of study since it would contribute to emulsion-lubrication in a metal-working process and for copper storage.

Mussel-inspired modification of a polymer membrane for ultra-high water permeability and oil-in-water emulsion separation

2014 ◽  
Vol 2 (26) ◽  
pp. 10225-10230 ◽  
Author(s):  
Hao-Cheng Yang ◽  
Kun-Jian Liao ◽  
He Huang ◽  
Qing-Yun Wu ◽  
Ling-Shu Wan ◽  
...  
Keyword(s):  
Water Permeability ◽  
Atmospheric Pressure ◽  
High Water ◽  
Polymer Membrane ◽  
Water Emulsion ◽  
Surface Hydrophilicity ◽  
Oil In Water ◽  
Emulsion Separation ◽  
Oil Water ◽  
Oil In Water Emulsion

Polydopamine/polyethyleneimine-decorated membranes were fabricated with excellent surface hydrophilicity and high water permeability for oil/water emulsion separation under atmospheric pressure.

A Model for Lubrication by Oil-in-Water Emulsions

2009 ◽  
Vol 132 (1) ◽  
Author(s):  
Sy-Wei Lo ◽  
Tzu-Chun Yang ◽  
Yong-An Cian ◽  
Kuo-Cheng Huang
Keyword(s):  
Film Thickness ◽  
Volume Fraction ◽  
Ph Value ◽  
Oil Viscosity ◽  
Water Emulsion ◽  
Oil In Water ◽  
Critical Volume Fraction ◽  
Oil Concentration ◽  
Dynamics Simulations ◽  
Oil In Water Emulsion

A model for oil-in-water emulsion has been developed in this paper. A group of viscosity coefficients transiting smoothly and incessantly from the thick film region to the thin film region is defined. The contributions from disperse and continuous phases to the total lubricant pressure and pressure gradient are functions of the oil concentration and the film thickness. The parameters used in these functions are determined by a series of computational fluid dynamics simulations. The onset of inversion and the viscosity after inversion are also investigated. It is found that the critical volume fraction of oil in the inception of inversion is dependent on the oil viscosity and a factor regarding the combined effects from the emulsifier, pH value, droplet size, and the shear rate. A series of simulations using the proposed model has been carried out and compared with the experimental results, such as the film thickness and the extension of oil pool for various rolling speeds and supply oil concentrations. The numerical outputs are basically in agreement with the experiments.

Investigation of the film formation mechanism of oil-in-water (O/W) emulsions

Soft Matter ◽  
2011 ◽  
Vol 7 (9) ◽  
pp. 4207 ◽  
Author(s):  
Liran Ma ◽  
Chenhui Zhang ◽  
Jianbin Luo
Keyword(s):  
Formation Mechanism ◽  
Film Formation ◽  
Oil In Water ◽  
Film Formation Mechanism

Film forming characteristics of oil-in-water emulsion with super-low oil concentration

2009 ◽  
Vol 340 (1-3) ◽  
pp. 70-76 ◽  
Author(s):  
Liran Ma ◽  
Jianbin Luo ◽  
Chenhui Zhang ◽  
Shuhai Liu ◽  
Xinchun Lu ◽  
...  
Keyword(s):  
Water Emulsion ◽  
Oil In Water ◽  
Film Forming ◽  
Oil Concentration ◽  
Forming Characteristics ◽  
Oil In Water Emulsion

The design of lubricious oil-in-water emulsions

1997 ◽  
Vol 211 (3) ◽  
pp. 195-208 ◽  
Author(s):  
M Ratoi-Salagean ◽  
H Spikes ◽  
R Hoogendoorn
Keyword(s):  
Film Formation ◽  
Elastohydrodynamic Lubrication ◽  
Surface Wetting ◽  
Water Emulsion ◽  
Base Oil ◽  
Dispersed Oil ◽  
Oil In Water ◽  
Key Factor ◽  
Phase Surface ◽  
Oil In Water Emulsion

Oil-in-water emulsions, as used in metal working and fire-resistant hydraulic fluids, often show poor lubricating performance and one reason for this is their inability to form effective elastohydrodynamic films. This paper considers how the composition of an oil-in-water emulsion contributes to its lubricating properties. A key factor in oil-in-water emulsion performance lies in the ability of the dispersed oil droplets to wet polar metal surfaces and thus promote full elastohydrodynamic lubrication, without starvation, up to high speeds. In this paper it is shown how this ability can be quantified in terms of measurable surface chemical parameters. Based on this work, three rules for designing lubricious oil-in-water emulsions are proposed. Where possible (a) the emulsifier concentration used should be just below its critical micelle concentration value, (b) the base oil should be polar and (c) the base oil should be viscous. The first two of these factors will promote oil-phase surface wetting while the third will ensure thick-film formation in the full elastohydrodynamic regime.

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