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.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.59624 |
| Date | January 1990 |
| Creators | Ricard, Serge |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | French |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Chemistry.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001171175, proquestno: AAIMM66351, Theses scanned by UMI/ProQuest. |
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