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Magnetic alignment of nontronite dispersions

M. MacGregor-Ramiasa ; Christoffer Abrahamsson (Institutionen för kemi och kemiteknik, Teknisk ytkemi ; SuMo Biomaterials) ; M. Röding ; M. Nydén
Applied Clay Science (0169-1317). Vol. 116-117 (2015), p. 167-174.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Birefringence, Magnetic alignment kinetics, Magnetic-responsive, Nontronite



Denna post skapades 2015-09-17. Senast ändrad 2016-03-21.
CPL Pubid: 222659

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Teknisk ytkemi
SuMo Biomaterials

Ämnesområden

Polymerkemi

Chalmers infrastruktur