Double Layer Capacitance Measurements To Characterize the Water Intrusion into Porous Materials
| Autor: | Pradeep Kumar Sow, Luke Damron, Hoda Talebian, Zhaowei Lu, Walter Mérida |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Double-layer capacitance Analytical chemistry 02 engineering and technology Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Cross section (physics) General Energy Pressure measurement law Fiber Wetting Physical and Theoretical Chemistry Composite material 0210 nano-technology Porous medium |
| Zdroj: | The Journal of Physical Chemistry C. 120:24794-24802 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b07861 |
| Popis: | In this work, we have proposed and substantiated a novel approach to study the dynamic wetting behavior during water intrusion, demonstrated for a porous carbon fiber substrate. The proposed methodology quantifies the evolution of the wetted interfacial area during intrusion by electrochemically measuring the double layer capacitance, which is proportional to the solid–liquid interfacial area. We investigated the intrusion behavior for three commercially available substrates with distinct thicknesses and internal microstructures, using a combination of capacitance and pressure measurements. For the same imbibed volume of water, the pressure increase was comparable, while the capacitance increase was distinct for the substrates with dissimilar internal microstructures. The hydraulic radius and the cross section of the intruding meniscus of water reduced during the course of intrusion. A correlation between the capacitance and the pressure–volume work has been proposed as a measure for quantifying the favor... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|