Determination of the zeta potential of porous substrates by droplet deflection: II. Generation of electrokinetic flow in a nonpolar liquid

Langmuir : the ACS Journal of Surfaces and Colloids
Dominik P J BarzPaul H Steen

Abstract

Here we study the nature and extent of free electrical charges in nonpolar liquids, using a recently introduced technique of observing droplet deflection generated by electrokinetic flow in a porous substrate. In the presence of dispersed water, surfactant molecules agglomerate and inverted micelles are generated which may act as charge carriers. In the present work, the conductivities of solutions of a nonpolar liquid with several concentrations of a dissolved surfactant are measured by electrical transients. The induced current densities are proportional to the applied voltage, indicating that the solutions represent an ohmic system. The conductivity does not scale simply with the surfactant concentration, though. It is inferred that different micellization mechanisms exist depending on the surfactant concentration, and a model is sketched. Further experiments reveal that flows of such solutions can be generated within saturated porous substrates when they are subjected to moderate electric fields. An investigation of the phenomena leads to the conclusion that these flows exist due to the presence of an electrical double layer; that is, they are of electrokinetic (electroosmotic) origin. Hence, the measured electrokinetic flo...Continue Reading

References

Jan 1, 1980·Topics in Current Chemistry·H F Eicke
Nov 13, 2003·Journal of Colloid and Interface Science·Shuhuai Yao, Juan G Santiago
May 18, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·M F HsuD A Weitz
Aug 11, 2005·Proceedings of the National Academy of Sciences of the United States of America·Michael J VogelPaul H Steen
Sep 7, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Junhyung KimLuc J M Schlangen
Apr 25, 2006·Journal of Colloid and Interface Science·Filip StrubbeKristiaan Neyts
Mar 21, 2007·Journal of Colloid and Interface Science·A V DelgadoUNKNOWN International Union of Pure and Applied Chemistry, Physical and Biophysical Chemistry Division IUPAC Technical Report
Jan 18, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·D C PrieveR Bethea
Jun 10, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·G Seth RobertsPaul Bartlett

❮ Previous
Next ❯

Citations

Aug 26, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Mary E ParentDick Henze
Jun 12, 2012·Physical Chemistry Chemical Physics : PCCP·Amparo M Gallardo-MorenoM Luisa González-Martín
Aug 24, 2010·Journal of Colloid and Interface Science·Saran PoovarodomJohn C Berg
Mar 30, 2010·Journal of Colloid and Interface Science·Saran Poovarodom, John C Berg
Apr 22, 2015·Advances in Colloid and Interface Science·Matthew Michael Gacek, John C Berg
Nov 29, 2012·Physical Chemistry Chemical Physics : PCCP·Gregory N Smith, Julian Eastoe
Nov 25, 2018·International Journal of Biological Macromolecules·Jian ZhangYaoming Liu

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Langmuir : the ACS Journal of Surfaces and Colloids
Dennis C PrieveR Bethea
Langmuir : the ACS Journal of Surfaces and Colloids
G Seth RobertsPaul Bartlett
Langmuir : the ACS Journal of Surfaces and Colloids
M F HsuDavid A Weitz
Langmuir : the ACS Journal of Surfaces and Colloids
Qiong GuoSven Holger Behrens
Langmuir : the ACS Journal of Surfaces and Colloids
Junhyung KimLuc J M Schlangen
© 2022 Meta ULC. All rights reserved