Influence of charge density and calcium salt on stiffness of polysaccharides multilayer film

- Pectin-chitosan multilayer film on colloidal particles is examined by electro-optics.
- Information on film stiffness is obtained from electro-optical effects at high fields.
- Film stiffness depends on polyelectrolyte charge density and divalent salt concentration.
- Anomalous electro-optical behavior is related to operation of elasto-hydrodynamic effect.