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Magnetic characterization of polyvinyl alcohol ferrogels and films

Published online by Cambridge University Press:  31 January 2011

Rebeca Hernández ,
German López ,
Daniel López ,
Manuel Vázquez  and
Carmen Mijangos
Rebeca Hernández
Affiliation:
Instituto de Ciencia y Tecnología de Polímeros, CSIC, 28006 Madrid, Spain
German López*
Affiliation:
Instituto de Ciencia y Tecnología de Polímeros, CSIC, 28006 Madrid, Spain
Daniel López
Affiliation:
Instituto de Ciencia y Tecnología de Polímeros, CSIC, 28006 Madrid, Spain
Manuel Vázquez
Affiliation:
Instituto de Ciencia de Materiales, CSIC, 28049 Madrid, Spain
Carmen Mijangos
Affiliation:
Instituto de Ciencia y Tecnología de Polímeros, CSIC, 28006 Madrid, Spain
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

This study elucidates the tunability of the magnetic properties of cobalt spinel ferrites embedded in a polyvinyl alcohol (PVA) hydrogel by changing the structure of the polymer network. We report on the preparation and characterization of sPS-CoFe2O4 ferrofluid and PVA/sulfonated polystyrene (sPS)-CoFe2O4 ferrogels obtained by submitting the samples to a different number of freezing–thawing (F–T) cycles. The magnetic properties were evaluated and interpreted as a function of the PVA/sPS-CoFe2O4 composition and final structure of the ferrogels.

Keywords

Magnetic propertiesCompositePolymer
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 8 , August 2007 , pp. 2211 - 2216
Copyright
Copyright © Materials Research Society 2007

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References

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