Magnetic alignment of nontronite dispersions

Melanie MacGregor-Ramiasa, Christoffer Abrahamsson, Magnus Röding, Magnus Nydén*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The time dependent alignment of exfoliated nontronite dispersions subjected to moderate magnetic field strengths (B. <. 0.8. T) is investigated. The chemical and physical properties of nontronite are thoroughly characterised as well as the phase behaviour of its aqueous dispersions at concentrations between 0.2 and 0.7. vol.%. The degree of nontronite alignment is associated with a birefringent light glow which increases with magnetic field strength, time and clay mineral concentration. Theoretical modelling indicates that the experimentally determined alignment kinetics have a characteristic timescale best described by a probability distribution. These findings are of importance for designing the optical, mechanical and barrier properties of clay polymer nanocomposites.

Original languageEnglish
Pages (from-to)167-174
Number of pages8
JournalApplied Clay Science
Volume116-117
DOIs
Publication statusPublished - Nov 2015
Externally publishedYes

Keywords

  • Nontronite
  • Magnetic-responsive
  • Magnetic alignment kinetics
  • Birefringence

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