The thickening principle of xanthan gum is quite simple, and it can be summarized in three key points:
1. The "unfolding" of macromolecules into a network in water
Xanthan gum is a long-chain polysaccharide. Upon contact with water, it rapidly absorbs water, expands, and disperses. Countless long chains entangle and interlock, forming a three-dimensional network structure in water. This network traps water molecules, preventing them from flowing freely, thus making the overall mixture thicker and more viscous.
2. A unique rigid double helix structure
Unlike other substances that become limp in water, xanthan gum forms a stable double helix structure that is rigid and firm. This structure enables it to thicken significantly even in small quantities and remain stable.
3. Electrostatic repulsion prevents agglomeration and sedimentation
Xanthan gum molecules carry a negative charge, causing them to repel each other. As a result, they remain evenly dispersed in water without clumping or layering, ensuring a stable thickening effect.
