Description
Xanthan gum forms shear-thinning pseudoplastic suspensions that prevent sedimentation of particulates through viscoelastic network formation.
Technical
Xanthan's helical structure (cellulose backbone with trisaccharide side chains) creates intermolecular associations via hydrogen bonding and polymer entanglement, producing yield-stress fluids that resist particle settling. The polyanionic character from glucuronic acid residues enhances hydration and electrostatic stabilization.
Culinary Significance
Enables stable emulsions and suspensions without altering flavor at ultralow concentrations, revolutionizing shelf-stable dressings and sauces.
Science
Primary Reaction
Hydrocolloid hydration and network formation
Parameters
Temperature
25°C optimal
0°C to 80°C range
Time
15 min hydration
instant – indefinite
Equipment