Electrospun SiNPs/ZnNPs-SiO2/TiO2 nanofiber membrane with asymmetric wetting: Ultra-efficient separation of oil-in-water and water-in-oil emulsions in multiple extreme environments

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.

Download Full-text

Stabilization of PVA/Chitosan/TiO2 Nanofiber Membrane with Heat Treatment and Glutaraldehyde Crosslink

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/367/1/012004 ◽

2018 ◽

Vol 367 ◽

pp. 012004 ◽

Cited By ~ 3

Author(s):

Nasikhudin ◽

M. Diantoro ◽

A. Kusumaatmaja ◽

K. Triyana

Keyword(s):

Heat Treatment ◽

Nanofiber Membrane ◽

Tio2 Nanofiber

Download Full-text

An Oligoimide Particle as a Pickering Emulsion Stabilizer

Polymers ◽

10.3390/polym10101071 ◽

2018 ◽

Vol 10 (10) ◽

pp. 1071 ◽

Cited By ~ 3

Author(s):

Yu-Jin Cho ◽

Dong-Min Kim ◽

In-Ho Song ◽

Ju-Young Choi ◽

Seung-Won Jin ◽

...

Keyword(s):

Particle Concentration ◽

Pickering Emulsion ◽

Pickering Emulsions ◽

Step Method ◽

Wetting Properties ◽

Emulsion Droplets ◽

Step Procedure ◽

Oil In Water ◽

One Step ◽

Oil Emulsions

A pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA)-based oligoimide (PMDA-ODA) was synthesized by a one-step procedure using water as a solvent. The PMDA-ODA particles showed excellent partial wetting properties and were stably dispersed in both water and oil phases. A stable dispersion was not obtained with comparison PMDA-ODA particles that were synthesized by a conventional two-step method using an organic solvent. Both oil-in-water and water-in-oil Pickering emulsions were prepared using the oligoimide particles synthesized in water, and the size of the emulsion droplet was controlled based on the oligoimide particle concentration. The oligoimide particles were tested to prepare Pickering emulsions using various kinds of oils. The oil-in-water Pickering emulsions were successfully applied to prepare microcapsules of the emulsion droplets. Our new Pickering emulsion stabilizer has the advantages of easy synthesis, no need for surface modification, and the capability of stabilizing both oil-in-water and water-in-oil emulsions.

Download Full-text

Naphthenic Acids: Formation, Role in Emulsion Stability, and Recent Advances in Mass Spectrometry-Based Analytical Methods

Journal of Analytical Methods in Chemistry ◽

10.1155/2021/6078084 ◽

2021 ◽

Vol 2021 ◽

pp. 1-15

Author(s):

Roselaine Facanali ◽

Nathália de A. Porto ◽

Juliana Crucello ◽

Rogerio M. Carvalho ◽

Boniek G. Vaz ◽

...

Keyword(s):

Analytical Methods ◽

Oil And Gas ◽

Oil Quality ◽

Economic Value ◽

Oil And Gas Industry ◽

Naphthenic Acids ◽

Gas Industry ◽

Oil In Water ◽

Oil Emulsions ◽

Modern Analytical

Naphthenic acids (NAs) are compounds naturally present in most petroleum sources comprised of complex mixtures with a highly variable composition depending on their origin. Their occurrence in crude oil can cause severe corrosion problems and catalysts deactivation, decreasing oil quality and consequently impacting its productivity and economic value. NAs structures also allow them to behave as surfactants, causing the formation and stabilization of emulsions. In face of the ongoing challenge of treatment of water-in-oil (W/O) or oil-in-water (O/W) emulsions in the oil and gas industry, it is important to understand how NAs act in emulsified systems and which acids are present in the interface. Considering that, this review describes the properties of NAs, their role in the formation and stability of oil emulsions, and the modern analytical methods used for the qualitative analysis of such acids.

Download Full-text