Electric field induced structuring in clay-oil suspensions: new insights from WAXS, SEM, leak current, dielectric permittivity, and rheometry.

Journal of physics. Condensed matter : an Institute of Physics journal · 2010 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3312

Study snapshot

PublicationJournal of physics. Condensed matter : an Institute of Physics journal · 2010

Study typeother

Reported directionUnclear

Evidence ratingInsufficient

Abstract

The electric field induced structuring in clay-oil suspensions has been studied by means of wide angle x-ray scattering (WAXS), rheometry, scanning electron microscopy (SEM), as well as leak current density and dielectric constant measurements. The clay particles' orientation distribution was inferred from the azimuthal changes of the clay diffraction peak intensity. The angular width of that distribution was quantified through an orientational order parameter. Chain and column formation processes were distinguished by comparison of the time evolution of the diffraction peak amplitude with that of the current density. Leak current density was measured for different electric field strengths E and clay particle concentrations Φ. The following scaling relation was found: [Formula: see text]. In addition, the dependence of the yield stress on the electric field and on the particle concentration was measured and shown to scale as: [Formula: see text].

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Electric-field-induced structuring in clay-oil suspensions was characterized using WAXS, SEM, rheometry, and electrical measurements. Chain and column formation processes were distinguished by comparing time evolution of diffraction peak amplitude with current density. Leak current density and yield stress were measured across different electric field strengths and clay concentrations, and scaling relations were reported (formulas not provided in the abstract).

Outcomes measured

electric-field-induced structuring (chain/column formation) in clay-oil suspensions
clay particle orientation distribution / orientational order parameter (from WAXS)
leak current density
dielectric constant / permittivity
yield stress / rheological properties

Limitations

No numerical values for electric field strength, concentrations, or scaling exponents are provided in the abstract
No exposure frequency/waveform details are stated
Not a health/biological study; outcomes are material/physical properties

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "electric field (laboratory)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "electric-field-induced structuring (chain/column formation) in clay-oil suspensions",
    "clay particle orientation distribution / orientational order parameter (from WAXS)",
    "leak current density",
    "dielectric constant / permittivity",
    "yield stress / rheological properties"
  ],
  "main_findings": "Electric-field-induced structuring in clay-oil suspensions was characterized using WAXS, SEM, rheometry, and electrical measurements. Chain and column formation processes were distinguished by comparing time evolution of diffraction peak amplitude with current density. Leak current density and yield stress were measured across different electric field strengths and clay concentrations, and scaling relations were reported (formulas not provided in the abstract).",
  "effect_direction": "unclear",
  "limitations": [
    "No numerical values for electric field strength, concentrations, or scaling exponents are provided in the abstract",
    "No exposure frequency/waveform details are stated",
    "Not a health/biological study; outcomes are material/physical properties"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electric field",
    "clay-oil suspension",
    "WAXS",
    "SEM",
    "rheometry",
    "leak current density",
    "dielectric constant",
    "orientational order parameter",
    "yield stress",
    "scaling relation"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1088/0953-8984/22/32/324104
PubMed: 21386480

Read the original paper →

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