Dispersion of Fe 3O 4 suspensions using sodium dodecylbenzene sulphonate as dispersant

Dispersion of Fe 3O 4–water suspension is enhanced with appropriate decision of solution pH and the amount of dispersant, sodium dodecylbenzene sulphonate. Active adsorption of dispersant onto Fe 3O 4 takes place only at pH levels below the isoelectric point. The median diameter is reduced with an i...

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Bibliographic Details
Published inMaterials letters Vol. 61; no. 18; pp. 3974 - 3977
Main Authors Lee, Hyoung-Ho, Yamaoka, Shoichi, Murayama, Norihiro, Shibata, Junji
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2007
Subjects
Dispersion
Fe 3O 4
Magnetic materials
Powder technology
Sodium dodecylbenzene sulphonate
Powder technology
Sodium dodecylbenzene sulphonate
Fe 3O 4
Magnetic materials
Dispersion
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Summary:Dispersion of Fe 3O 4–water suspension is enhanced with appropriate decision of solution pH and the amount of dispersant, sodium dodecylbenzene sulphonate. Active adsorption of dispersant onto Fe 3O 4 takes place only at pH levels below the isoelectric point. The median diameter is reduced with an increase in the adsorption amount of dispersant at first, and then it increases remarkably with higher adsorption. Change in Fe 3O 4 particle size according to the adsorption amount of dispersant is explained on the basis of contact angle measurements which relate to hydrophobicity or hydrophilicity of Fe 3O 4 particles.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2006.12.091