2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

Synthesis and Characterization Colloidal Particles from Phytosterols

L. Rossi, S. Sacanna, K.P. Velikov
Unilever Food & Health Research Institute, NL

colloidal particles, liquid crystals

Phytosterols are plant analogues for human cholesterol and are being used to control blood cholesterol levels. We report on the preparation of water dispersible phytosterol colloidal particles using antisolvent precipitation method in the presence of surfactants. Various synthesis parameters were tuned, such as surfactant and sterol concentration and antisolvent polarity, and their effect on the resulting particles were investigated. Light scattering measurements, confirmed by electron microscopic observations, were used to determine the morphology of the particles, indicating rod-like structures. A preliminary study on the phase behaviour of concentrated dispersions reveals the existence of a liquid crystal phase that further confirms the rod-like structures of the particles.

Nanotech 2008 Conference Program Abstract