Transverse susceptibility and polymer adsorption of magnetic ink

Author

Jeon, Kwang S. ; Shrauti, Suresh M. ; Arnold, David W. ; Lane, Alan M.

Author_Institution

Dept. of Chem. Eng., Alabama Univ., AL, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3067

Lastpage

3069

Abstract

The effect of polymer adsorption on the dispersion of magnetic inks was investigated. Co-γFe₂O₃ particles were treated with pyridine and phenol to poison acidic and basic sites present on their surfaces. The adsorption of a PVC polymer containing sulfonic acid functional groups was decreased with both chemicals, particularly when combined. Transverse susceptibility and rheology measurements were used to evaluate the degree of the dispersion of the magnetic inks. A proposed model for polymer conformation on the particle surface is used to explain the results. We demonstrate the need for both acidic and basic sites fur good dispersion and high magnetic susceptibility

Keywords

adsorption; cobalt; ferrites; flocculation; magnetic fluids; magnetic particles; magnetic susceptibility; rheology; Co-Fe₂O₃; dispersion; magnetic ink; particle surface; polymer adsorption; polymer conformation; rheology measurements; transverse susceptibility; Chemicals; Dispersion; Gaussian processes; Ink; Magnetic particles; Magnetic susceptibility; Pigmentation; Polymers; Rheology; Solvents; Surface treatment; Toxicology;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617846

Filename

617846