| EPSRC Reference: |
GR/M05324/01 |
| Title: |
INTERACTING ELECTRIC DOUBLE-LAYERS IN LAMELLAR POLYELECTROLYTES |
| Principal Investigator: |
Hansen, Professor JP |
| Other Investigators: |
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| Department: |
Chemistry |
| Organisation: |
University of Cambridge |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 January 1999 |
Ends: |
31 December 2001 |
Value (£): |
135,454
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| EPSRC Research Topic Classifications: |
| Complex fluids & soft solids |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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State-of-the-art density functional theories (DFT) will be used to address the following problems :a) Determine the effective interaction between finite charged platelets surrounded by their highly anisotropic electric double-layers. The platelets will be modelled by rigid discs (e.g. the synthetic clay laponite), while co- and computer-ions will be modelled by point charges, and the solvent by a dielectric continuum. The problem will first be treated within linearised Poisson-Boltzmann (PB) theory.b) In a second stage a model will be improved along the following lines: non-linear PB theory; finite size of the microscopy ions; discreteness of surface charge distribution of polyions; civilised (i.e. molecular) model of solvent.c) The resulting effective interactions will be used in Monte Carlo simulations of the structure and gelation of a clay suspension as a function of platelet and salt concentrations. The investigation of the large-scale fractal structure will require the introduction of a simplified lattice model.d) Finally the case of flexible membranes will be considered, allowing for the interplay between the curvature elastic energy and the Coulomb interactions.
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Key Findings |
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Potential use in non-academic contexts |
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.cam.ac.uk |