Preparation of Sodium Decylphosphate: Physical Chemical Measurements and Elaboration of the Binary Lyotropic Phase Diagram

Abstract

Preparation and analysis of sodium decylphosphate, and elaboration of the binary phase diagram with water as solvent are presented. Lyomesophases isotropic, nematic calamitic and hexagonal are present and were studied by polarizing microscopy, small angle x-ray scattering, densimetry and refratometry. The results are compared with a related surfactant system, sodium decylsulphate.

Key Words:

• Sodium decylphosfate
• phase diagram
• density
• refractometry
• x-ray analysis