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Magnetic orientatio...
Magnetic orientation of nontronite clay in aqueous dispersions and its effect on water diffusion
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- Abrahamsson, Christoffer, 1984 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nordstierna, Lars, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nordin, Matias, 1981 (author)
- Deutsches Krebsforschungszentrum (DKFZ),German Cancer Research Center (DKFZ)
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- Dvinskikh, Sergey V. (author)
- KTH,Tillämpad fysikalisk kemi,St. Petersburg State University, Russian Federation,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH),Saint Petersburg State University - Spsu
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- Nydén, Magnus, 1970 (author)
- University of South Australia
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(creator_code:org_t)
- Elsevier BV, 2015
- 2015
- English.
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In: Journal of Colloid and Interface Science. - : Elsevier BV. - 0021-9797 .- 1095-7103. ; 437, s. 205-210
- Related links:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The diffusion rate of water in dilute clay dispersions depends on particle concentration, size, shape, aggregation and water-particle interactions. As nontronite clay particles magnetically align parallel to the magnetic field, directional self-diffusion anisotropy can be created within such dispersion. Here we study water diffusion in exfoliated nontronite clay dispersions by diffusion NMR and time-dependant 1H-NMR-imaging profiles. The dispersion clay concentration was varied between 0.3 and 0.7 vol%. After magnetic alignment of the clay particles in these dispersions a maximum difference of 20% was measured between the parallel and perpendicular self-diffusion coefficients in the dispersion with 0.7 vol% clay. A method was developed to measure water diffusion within the dispersion in the absence of a magnetic field (random clay orientation) as this is not possible with standard diffusion NMR. However, no significant difference in self-diffusion coefficient between random and aligned dispersions could be observed.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- Nontronite clay
- Magnetic alignment
- Exfoliated clay
- Anisotropic microstructure
- Diffusion
- Permeability
- Bound water
- NMR 1D imaging
- Diffusion NMR
Publication and Content Type
- ref (subject category)
- art (subject category)
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