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Title of Journal: Korean J Chem Eng

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Abbravation: Korean Journal of Chemical Engineering

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Springer US

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DOI

10.1016/0024-6301(95)90402-6

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1975-7220

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Characterization of surface charge and zeta potent

Authors: Gyeong Sook Cho DongHyun Lee Hyung Mi Lim SeungHo Lee Chongyoup Kim Dae Sung Kim
Publish Date: 2014/06/25
Volume: 31, Issue: 11, Pages: 2088-2093
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Abstract

Colloidal silica is prepared by hydrolysis of TEOS direct oxidation of Si powder condensation of silicic acid etc There are differences in surface reactivity of silica particle due to the preparation routes Therefore it is useful to evaluate surface properties accurately in order to understand the physiochemical properties of the products The surface charge density site density and zeta potential with respect to three types of colloidal silica were estimated and discussed The surface charge density was different depending on preparation method It is decreasing in the order of direct oxidation ion exchange TEOS hydrolysis The zeta potential is decreasing in the order of ion exchange TEOS hydrolysis direct oxidation The order in surface charge density is different from that in zeta potential because of the difference in stability depending on the particle size and surface charge density

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