ANALYTICAL ULTRACENTRIFUGATION OF MAGNETIC FLUIDS

被引:1
|
作者
SEIFERT, A
BUSKE, N
机构
[1] GERMAN INST NUTR RES,W-1505 BERGHOLZ REHBRUCKE,GERMANY
[2] FRAUNHOFER INST PROD SYST & DESIGN TECHNOL,W-1199 BERLIN,GERMANY
关键词
D O I
10.1016/0304-8853(93)91052-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The thickness h of a surfactant adsorption layer plus a solvation layer of magnetite particles dispersed in n-decane or water ('magnetic fluids') has been estimated from the sedimentation velocity using an analytical ultracentrifuge (h = 4.6 or 4.7 nm) considering Fe3O4 core radii of 4.6 and 5.0 nm, respectively. Compression experiments and the spontaneous redispersability confirm the high stability of the n-decane magnetic fluids, in agreement with theoretical considerations.
引用
收藏
页码:115 / 118
页数:4
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