Rheological behavior of magnetic pulp fiber suspensions

Jorge H. Sánchez, Xiomara Pineda, Germán C. Quintana, Adriana P. Herrera

Resultado de la investigación: Contribución a una publicación especializadaArtículo

Resumen

This paper is focused on the rheology of magnetic pulp suspensions in absence and presence of an external magnetic field. Magnetic fibers were prepared by the lumen loading method using bleached eucalyptus fibers and cobalt ferrite (CoFe2O4) nanoparticles. The effect of mass consistency, temperature, concentration of magnetic fibers, and magnetic field strength on yield stress and apparent viscosity of the suspensions were investigated. In the absence of an applied field, a dependence of yield stress with consistency, as well as with the percentage of magnetic fibers present in the suspension, was found. In flow tests, all the suspensions exhibited shear-thinning behavior, showing that the viscosity is only affected by the consistency of the suspension. On the other hand, magnetorheological measurements show a negative effect of the applied magnetic field on the viscosity of the suspension. Application: The modification of cellulose fibers with magnetic particles offers a series of advantages that range from the possibility of manipulating the orientation and flocculation of suspended fibers to its use in the production of magnetic paper for the purposes of coding and storage, multi-printing, and magnetic protection, among

Idioma originalInglés
Páginas393-403
Número de páginas11
Volumen20
N.º6
Publicación especializadaTappi Journal
DOI
EstadoPublicada - jun. 2021

Nota bibliográfica

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© TAPPI Press 2021.

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