Methanol-water solutions: a bi-percolating liquid mixture

Details Methanol-water solutions: a bi-percolating liquid mixture Methanol-water solutions: a bi-percolating liquid mixture

2004-12-16

arxiv.org/abs/cond-mat/0412436v1

J Chem Phys 121(13) (2004) 6456-6462

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 6 figures

Scientific paper

10.1063/1.1789951

An extensive series of neutron diffraction experiments and molecular dynamics simulations has shown that mixtures of methanol and water exhibit extended structures in solution despite the components being fully miscible in all proportions. Of particular interest is a concentration region(methanol mole fraction between 0.27 and 0.54) where {\em both} methanol and water appear to form separate, percolating networks. This is the concentration range where many transport properties and thermodynamic excess functions reach extremal values. The observed concentration dependence of several of these material properties of the solution may therefore have a structural origin.

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