What You Need to Know
Xanthan's helical structure aligns under shear stress, breaking temporary hydrogen bonds between polymer chains. This reduces apparent viscosity via decreased intermolecular friction. Upon rest, the network reforms via cation-mediated chain associations (notably with Ca²⁺ or Na⁺).
Allows sauces to flow when poured but cling to surfaces without dripping—critical for plating precision and sensory delivery.
Key Parameters
Temperature
20°C
0°C - 100°C
Time
5 sec shear duration
Instantaneous (milliseconds) - Indefinite (reversible)
Equipment
Steps
- 1.
Ferran Adrià's Spherical Olive Gel (elBulli (2003)): Enables fluid gel injection while maintaining spherical integrity
- 2.
Heston Blumenthal's Hot & Cold Tea (The Fat Duck): Shear-thinning allows simultaneous perception of temperature layers
The Science
Primary Reaction
Shear-induced disentanglement of xanthan helices