• Title, Summary, Keyword: 전기 동역학적 전위

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Fundamental Studies on the Characteristics of the Surface Electrokinetic Behavior of Particulate Matter as an Extensive Property (입자성 물질의 크기성질로서의 표면 전기적 특성 규명에 대한 기초연구)

  • O, Se-Jin;Kim, Dong-Su
    • Journal of Korean Society of Environmental Engineers
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    • v.32 no.6
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    • pp.581-586
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    • 2010
  • Generally, electrokinetic potential has been considered as an intensive property. In other words, electrokinetic potential is not affected by the amount of particulate matter. Montmorillonite, one of essential inorganic matter, was chosen to measure electrokinetic potential. The result of electrokinetic potential measuring experiment showed that the value observed to decrease as the amount of montmorillonite clay increased. This is due to the fact that total ions that adsorbed per unit mass were decreased as the amount of montmorillonite was increased. As a result, electrokinetic potential is considered as an extensive property. By using these results, total interaction energy of suspension was also checked, and revealed that total interaction energy was decreased as the amount of montmorillonite increased.

Electrokinetics Evaluation of Poly(styrene-ethylene-butylene-styrene) Based Anion Exchange Membrane (Poly(styrene-ethylene-butylene-styrene)계 고분자 음이온교환막 계면동전위 특성평가)

  • Son, Tae Yang;Yun, Jun Seong;Han, Song I;Nam, Sang Yong
    • Membrane Journal
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    • v.27 no.5
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    • pp.399-405
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    • 2017
  • The zeta potential, called an electrokinetic potential, refers to the potential difference caused by electrodynamic phenomenon, which is a value obtained by quantifying the surface charge property. The zeta potential has been actively studied for membrane fouling, confirmation of modification and substituent confirmation through surface charge analysis. The methods of measurement for zeta potential were developed on the basis of electrophoresis, electrosmosis and streaming potential. Among them, it was known that the streaming potential method was suitable for the flat sheet membrane. So, in this study, aminated poly(styrene-ethylene-butylene-styrene) membranes were prepared by introducing ammonium groups and the streaming potentials of the prepared membranes were measured by using an electrokinetic potential analyzer (SurPASS) and the results were analyzed.

A Basic Study on Micro-Electric Potential accompanied with Specimen Failure during Uniaxial Compressive Test (일축 압축에 의한 시료 파괴 시 수반되는 미소 전위에 대한 기초 연구)

  • Kim, Jong-Wook;Park, Sam-Gyu;Song, Young-Soo;Sung, Nak-Hun;Kim, Jung-Ho;Cho, Seong-Jun
    • Geophysics and Geophysical Exploration
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    • v.10 no.3
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    • pp.203-210
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    • 2007
  • As a part of basic studies on monitoring of landslides and slope stability using SP measurements, micro-electric potentials of rock samples were measured accompanied with the rock failure by a uniaxial loading test were measured. The measurement system consists of a 8 channel A/D converter with 24 bit resolution, uniaxial loading tester, strain gages and 4 sets of electrode attached to a rock sample. Rock samples of granite, limestone, and sandstone were tested. Also, mortar samples were tested in order to monitor electric-potentials of a uniform sample. Micro-electric potentials were detected in all saturated samples and the strength of them increased as the loading force increased. Sandstone samples showed the largest strength of micro-electric potential and it followed limestone and granite samples, which indicates a positive relationship with porosity of rocks. The mechanism generating these micro-electric potential can be explained in terms of electro-kinetics. In case of dry samples, micro-electric potential could be observed only in sandstone samples, where piezoelectric effect played main role due to high contents of quartz in sandstone samples. We found that biggest micro-electric potentials were observed at the electrodes near the crack surface of rock samples. This is very encouraging result that SP monitoring can be applied to predicting landsliding or to estimate collapsing position combining with monitoring of acoustic emissions.