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Effect of Reaction Conditions on the Size and Size Distribution of Magnetite Nanoparticles Coated with Siloxane  

윤관한 (금오공과대학교 신소재시스템공학부)
한창민 (금오공과대학교 신소재시스템공학부)
장용민 (경북대학교 진단방사선과)
Publication Information
Polymer(Korea) / v.28, no.2, 2004 , pp. 170-176 More about this Journal
Abstract
The effect of reaction conditions on the size and size distribution of superparamagnetic iron oxide coated with siloxane was big investigated by using dynamic light scattering. The hydrogen bond between the hydroxyl groups on tile surface of the magnetite and silanol was confirmed by FT-IR. The size of nanoparticles increased with the reaction temperature, but decreased with monomer contents and agitation speeds. There was not a big difference in size of nanoparticles, prepared by different reaction conditions, but its distribution was in the range of 14∼41nm. All samples exhibited the superparamagnetic nature. The magnetic susceptibility of the nanoparticles increased with the reaction temperature while it decreased with the monomer content and agitation speed.
Keywords
contrast agent; siloxane; superparamagnetic iron oxide; size and size distribution;
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