TiO2-SiO2 nanoparticle-stabilised soybean oil-in-water emulsions: dispersion stability, rolling lubrication performance and surface self-cleaning effects

Abstract Vegetable oil-in-water (VO/W) emulsions are common cold rolling lubricants. However, maintaining the required dispersion for polar oil droplets for consistent lubrication and proper surface self-cleaning after rolling remains a practical challenge. In this study, titanium silicate TiO2-SiO2 nanoparticle (NP) stabilised soybean oil emulsions are produced and NPs function as dispersant, lubrication enhancer, and detergent agent to clean up oil residue are explored. Cold rolling of SS316 reveals a threshold of NPs wt %, at which stably dispersed oil droplets improve tribology and lower the rolling parameters relative to that without or at high wt % of NPs. Cleaner as-rolled strips are also obtained with NPs. Favourable results are attributed to formation of NP-coating layers on oil droplets which enhances dispersion, optimises plate-out while keeping adequate wetting, and provides a 3-body abrasive rolling as opposed to 2-body adhesion without NPs. A model of sliding-rolling lubrication in cold rolling is also discussed.

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Switchable superlyophobic zeolitic imidazolate framework-8 film-coated stainless-steel meshes for selective oil–water emulsion separation with high flux

New Journal of Chemistry ◽

10.1039/d0nj02517h ◽

2020 ◽

Vol 44 (32) ◽

pp. 13534-13541

Author(s):

Xin Gao ◽

Qiang Ma ◽

Zhengwei Jin ◽

Pei Nian ◽

Zheng Wang

Keyword(s):

Stainless Steel ◽

High Flux ◽

Water Droplets ◽

Oil Droplets ◽

Zeolitic Imidazolate Framework ◽

Water Emulsion ◽

Oil In Water ◽

Emulsion Separation ◽

Oil Water ◽

Oil Emulsions

A switchable superlyophobic ZIF-8 membrane can selectively remove oil droplets in oil-in-water emulsions via superoleophobicity and water droplets in water-in-oil emulsions via superhydrophobicity.

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Wax Morphology and Gas Exchange of Peach and Apple Leaves as Influenced by Soybean Oil Emulsions and Rain

HortScience ◽

10.21273/hortsci.33.3.464a ◽

1998 ◽

Vol 33 (3) ◽

pp. 464a-464

Author(s):

B. R. Bondada ◽

C.E. Sams ◽

D.E. Deyton ◽

J.C. Cummins

Keyword(s):

Gas Exchange ◽

Soybean Oil ◽

Stomatal Closure ◽

Leaf Age ◽

Oil Retention ◽

Apple Leaves ◽

Surface Wax ◽

Leaf Surfaces ◽

Oil Residue ◽

Oil Emulsions

A study was conducted to investigate the influence of rain on retention of soybean oil emulsions and their influence on wax morphology and gas exchange of apple and peach leaves. Peach and apple trees were grown in 19-liter pots in a greenhouse (25 °C). Two different soybean oil emulsions were sprayed on trees in a randomized block design with five replications. Twenty-four hours after the oil sprays, the trees were subjected to three rainfall regimes, 0.25, 1.25, and 2.54 cm. The surface wax and the oil residue on leaves were determined gravimetrically after chloroform extraction. A negative relationship existed between rainfall and oil retention. Peach leaves receiving 0.25, 1.25, and 2.54 cm rainfall lost 19%, 62%, and 82% of the applied oil, respectively. There were no differences in oil retention between top, middle, and bottom layers of the canopy, indicating that leaf age did not influence oil retention. Oil residue loss from apple leaves was similar to that from peach. Scanning electron microscopy revealed that the leaf wax morphology was not affected by the soybean oil emulsions and occurred as striations on both leaf surfaces. However, one of the emulsions partially washed off the waxes from apple leaf surfaces whereas the other emulsion did not exhibit this phenomenon. Furthermore, both of the soybean oil emulsions induced partial or full stomatal closure, which influenced stomatal conductance and transpiration.

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Water reorientation dynamics in colloidal water–oil emulsions

Physical Chemistry Chemical Physics ◽

10.1039/d1cp03182a ◽

2021 ◽

Author(s):

Eliane P. van Dam ◽

Roland Gouzy ◽

Eddie Pelan ◽

Krassimir P. Velikov ◽

Huib J. Bakker

Keyword(s):

Infrared Spectroscopy ◽

Surface Area ◽

Droplet Size ◽

Total Surface Area ◽

Oil Droplets ◽

Pump Probe ◽

Oil In Water ◽

Reorientation Dynamics ◽

Oil Emulsions

Polarization resolved pump–probe infrared spectroscopy of colloidal oil-in-water emulsions demonstrates that the total surface area of oil droplets is independent of the average droplet size, indicating that the oil droplets are strongly corrugated.

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Dispersion Stability and Lubrication Performance Correlation of Vegetable Oil-In-Water Emulsions with Nanoparticle-Shielded Oil Droplets

Lubricants ◽

10.3390/lubricants6020055 ◽

2018 ◽

Vol 6 (2) ◽

pp. 55 ◽

Cited By ~ 2

Author(s):

Reza Taheri ◽

Buyung Kosasih ◽

Hongtao Zhu ◽

Anh Tieu

Keyword(s):

Vegetable Oil ◽

Dispersion Stability ◽

Oil Droplets ◽

Oil In Water ◽

Lubrication Performance

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Net CO2 Assimilation of Apple following Application of Soybean Oil

HortScience ◽

10.21273/hortsci.32.3.531c ◽

1997 ◽

Vol 32 (3) ◽

pp. 531C-531

Author(s):

R.E. Moran ◽

D.E. Deyton ◽

C.E. Sams ◽

J. Cummins ◽

C.D. Pless

Keyword(s):

Soybean Oil ◽

Fruit Trees ◽

Co2 Assimilation ◽

Net Co2 Assimilation ◽

Oil In Water ◽

Separate Treatment ◽

Oil Residue ◽

Oil Concentration ◽

Petroleum Oil

Soybean oil can be used as an alternative pesticide for fruit trees. Two separate studies were conducted to determine the effects of oil concentration on leaf phytotoxicity and net CO2 assimilation (ACO2). In one study, concentrations of 0%, 2%, 4%, and 6% soybean oil in water were applied to individual shoots with a hand-held mist bottle. In the second study, 0%, 1.0%, and 1.5% were applied to whole trees with an airblast sprayer. Petroleum oil was applied as a separate treatment. Net CO2 assimilation was measured on single leaves. Oil residue was removed from the leaf with chloroform, dried, and weighed. Chlorosis and defoliation occurred with applications of 4% and 6% soybean oil. No visible phytotoxicity occurred with 2% or less oil. Net CO2 assimilation decreased as the rate of soybean oil increased from 0% to 4% oil, but there was no difference between 4% and 6%. Net CO2 assimilation decreased with increasing oil concentration from 0% to 1.5% and recovered to the rate of the control on day 7. Net CO2 assimilation was negatively related to oil residue. At an equivalent oil residue, there was no difference in ACO2 between petroleum and soybean oil. Below a residue of 0.15 mg·cm–2, foliar phytoxicity did not occur. Reductions in ACO2 were small and did not last longer than 7 days if residues were ≤0.10 mg·cm–2.

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Visual Appearance of Oil on the Sea

Journal of Marine Science and Engineering ◽

10.3390/jmse9010097 ◽

2021 ◽

Vol 9 (1) ◽

pp. 97

Author(s):

Merv Fingas

Keyword(s):

Water Surface ◽

Oil Spills ◽

Discharge Rate ◽

Physical Explanation ◽

Visual Appearance ◽

Oil In Water ◽

Other Information ◽

Surface Discharges ◽

Oil Emulsions ◽

Spilled Oil

The visual appearance of oil spills at sea is often used as an indicator of spilled oil properties, state and slick thickness. These appearances and the oil properties that are associated with them are reviewed in this paper. The appearance of oil spills is an estimator of thickness of thin oil slicks, thinner than a rainbow sheen (<3 µm). Rainbow sheens have a strong physical explanation. Thicker oil slicks (e.g., >3 µm) are not correlated with a given oil appearance. At one time, the appearance of surface discharges from ships was thought to be correlated with discharge rate and vessel speed; however, this approach is now known to be incorrect. Oil on the sea can sometimes form water-in-oil emulsions, dependent on the properties of the oil, and these are often reddish in color. These can be detected visually, providing useful information on the state of the oil. Oil-in-water emulsions can be seen as a coffee-colored cloud below the water surface. Other information gleaned from the oil appearance includes coverage and distribution on the surface.

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