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Fibres et papier à propriétés magnétiques

The fundamental objectives of this research is to produce and study magnetically loaded fibers and magnetic paper. The lumen-loading of commercially available ferrimagnetic (Fe$ sb3$O$ sb4$, $ gamma$-Fe$ sb2$O$ sb3$) and ferromagnetic (CrO$ sb2$) pigments was first performed as a "physical" approach to prepare magnetic paper. Our experiments resulted in the determination of the "kraft pulp/$ gamma$-Fe$ sb2$O$ sb3$ pigment" composite as an optimal combination of optical, mechanical and magnetic properties. / We have also developed a "chemical" process for the preparation of magnetic fibers which consists of using a cellulosic substrate with ion-exchange properties for Fe(II), i.e. Na-carboxymethylcellulose, as a host matrix for the growth of very small iron oxide particles. The in situ oxidation reaction of Fe(OH)$ sb2$ in the fiber cell walls yielded to superparamagnetic ferrite particles of about 100 A. / Because magnetism is a value added property for paper, our specialty fibers allow exploration of new concepts in papermaking (e.g. fiber orientation during paper formation), information storage, paper handling in copiers, magnetographic printing, etc.

Identiferoai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.59624
Date January 1990
CreatorsRicard, Serge
PublisherMcGill University
Source SetsLibrary and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada
LanguageFrench
Detected LanguageEnglish
TypeElectronic Thesis or Dissertation
Formatapplication/pdf
CoverageMaster of Science (Department of Chemistry.)
RightsAll items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated.
Relationalephsysno: 001171175, proquestno: AAIMM66351, Theses scanned by UMI/ProQuest.

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