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Chemicals, plastics and rubber industries

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Spontaneous formation of fractal structures on triglyceride surfaces with reference to their super water-repellent properties

Article Abstract:

The spontaneous formation of fractal structures is seen on triglyceride surfaces, which have shown the water-repellent property. The spontaneous formation of fractal structures have resulted from the phase transition from the metastable [alpha] to the stable [beta] crystalline phase and the growth of a lot of microcrystals, where the rates of phase transition and the super water-repellent formation have depended on the temperature and the molecular size.

Triglycerides, Structure

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Role of aerosil dispersion on the activated kinetics of the L[C.sub.1-x][Sil.sub.x] system

Article Abstract:

The role of aerosil dispersion on activated phase transitions of bulk octylcyanobiphenyl (8CB) liquid crystals is explored by performing heating rate-dependent experiments. Infrared (IR) spectroscopy has indicated a shift to higher frequency, corresponding to a Si-O bond as the density of the aerosil increases, and can be explained in terms of surface and molecular interactions between aerosil nanoparticles and 8CB liquid crystal molecules.

Spectra, Infrared spectroscopy, Phenyl compounds

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Viscosity measurements of water at high temperatures and pressures using dynamic light scattering

Article Abstract:

The application of a dynamic light scattering (DLS) photometer to measure viscosity of water at high temperatures and pressures up to the supercritical state is demonstrated. The viscosity of water is measured successfully up to 297 degrees Celsius and at constant pressure of 25 MPa, using colloidal gold as the probe, but the applicability of the technique is limited by the colloidal and chemical stabilities of the probe particles used.

Measurement, Viscosity, Light scattering, Water temperature

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