Description
Xanthan gum creates shear-thinning behavior by forming weak molecular networks that break under force.
Technical
Xanthan gum's helical structure forms a pseudoplastic fluid where intermolecular associations yield under shear stress (≥50 s⁻¹), then re-form at rest via hydrogen bonding between polysaccharide chains.
Culinary Significance
Enables stable emulsions that pour smoothly when shaken but cling to surfaces when static, preventing salad dressing separation.
Science
Primary Reaction
Non-Newtonian fluid dynamics
Parameters
Temperature
20°C optimal
0°C to 85°C range
Time
15 min hydration
Instant – Indefinite
Equipment
High-shear mixerWhisk