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Preparation of In Situ Magnetically Loaded Cellulose Fibers

Published online by Cambridge University Press:  16 February 2011

Serge Ricard  and
Robert H. Marchessault
Serge Ricard
Affiliation:
Dept. of Chemistry, McGill Univ., Montreal (Quebec), Canada, H3A 2A7
Robert H. Marchessault
Affiliation:
Dept. of Chemistry, McGill Univ., Montreal (Quebec), Canada, H3A 2A7
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Abstract

Magnetic paper handsheets with pigment loadings in the order of 10–30%, depending on the experimental conditions, have been made using the established “lumen-loading” technology. These sheets have bulk magnetic properties comparable with the computer floppy-disk products. In order to minimize the particle size of pigments and thereby explore a new level of optical and magnetic properties, in situ synthesis of pigment particles is a second approach. This chemistry starts with a carboxymethylcellulose substrate with ion-exchange properties for Fe(ll). The substrates, before and after oxidation reactions to produce ferrite particles, are characterized by: conductimetric titration, x-ray diffraction, thermogravimetric analysis, and magnetization determination. Electron microscopy and diffraction provide insight on the ferrite morphologicals. These specialty fibers allow exploration of new concepts in papermaking, information storage, security printing and paper handling.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 197: Symposium U – Materials Interactions Relevant to the Pulp, Paper and Wood Industries , 1990 , 319
Copyright
Copyright © Materials Research Society 1990

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References

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