Magnetic alignment of nontronite dispersions
Artikel i vetenskaplig tidskrift, 2015

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.

Birefringence

Magnetic alignment kinetics

Nontronite

Magnetic-responsive

Författare

M. MacGregor-Ramiasa

University of South Australia

Christoffer Abrahamsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

SuMo Biomaterials

Magnus Röding

University of South Australia

Magnus Nydén

University of South Australia

Applied Clay Science

0169-1317 (ISSN)

Vol. 116-117 167-174

Ämneskategorier

Polymerkemi

DOI

10.1016/j.clay.2015.08.014