Electrophoretic kinetics of concentrated TiO2 nanoparticle suspensions in aprotic solvent

Title
Electrophoretic kinetics of concentrated TiO2 nanoparticle suspensions in aprotic solvent
Authors
최인석이소연임정열이세희남기태주영창
Keywords
electrophoresis; electrophoretic mobility; TiO2 particles
Issue Date
2018-01
Publisher
Electronic materials letters
Citation
VOL 14, NO 1-82
Abstract
We studied the dependences of the concentration of additive and particle size on the electrophoretic mobility of TiO2 nanoparticles. A high concentration of TiO2 nanoparticles was dispersed in aprotic solvent, which is similar to the operating conditions of electrophoretic applications. Because spectroscopy has limits to measuring the electrophoretic mobility of concentrated suspensions in aprotic solvents, we developed a new measurement to determine the electrophoretic mobility of particles using the reflectance change according to the motion of the particles. TiO2 nanoparticles with sizes of 31 nm to 164 nm were synthesized by hydrolysis and were dispersed in cyclohexanone with a dye (Sudan Black B) for use in the new measurement method. In a concentrated suspension in aprotic solvent, the mobility of the particles was proportional to the dye concentration and was inversely proportional to the size of the particles. This infers that the particle size influences the drag force rather than the surface charge, and therefore, to increase the mobility by changing the surface charge, an additive is effective.
URI
http://pubs.kist.re.kr/handle/201004/66897
ISSN
1738-8090
Appears in Collections:
KIST Publication > Article
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