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입자 영상 처리 시스템을 이용한 콜로이드 입자의 제타포텐셜 측정 및 나노유체 분산 특성 연구
이재근 ( J. K. Lee ),김성찬 ( S. C. Kim ),김희중 ( H. J. Kim ),이창건 ( C. G Lee ),주찬홍 ( C. H. Ju ),이래철 ( L. C. Lee ) 한국분무공학회 2003 한국액체미립화학회지 Vol.8 No.1
N/A Zeta potential measurements of colloid particles suspended in a liquid are performed by a Zeta Meter developed. There are many applications of colloid stability in spray technology, paints, wastewater treatment, and pharmaceuticalsc. Zeta potentials of charged particles are obtained by measuring the electrophoretic velocities of the particles using video enhanced microscopy and image analysis program. The values of zeta potential of polystyrene latex(PSL), silica(SiO_2), polyvinylidence difluoride(PVDF), silicon nitride, and alumina particles in deionized (DI) water were measured to be -40.5, -31.9, -25.2, -15.1 and -10.1 mV, respectively. The particles having high zeta potential less than -20 mV are stable in DI water, because the double layers of them have strong repulsive forces mutually, and the particles having low zeta potential over -20mV are unstable due to Van Der Waals forces. Silica(>20 nm), PSL, aluminum and PVDF particles were found to be stable that would remain separate and well disperse, while silicon nitride and alumina particles were found to be unstable that would gradually agglomerate in DI water.