Surface properties and bulk rheology of Sterculia apetala gum exudate dispersions

摘要: Abstract Exudate gums of Sterculia genus trees are known to have interesting thickening, emulsifying and stabilising properties. Surface tension measurements, dilatational surface viscoelastic properties bulk rheology results support the idea that gum exudate from apetala is capable adsorbing at surfaces produces aqueous dispersions with enhanced viscosity viscoelasticity. The rheological characterization was performed as a function concentration (0.5–3 w/v %) 25 °C. Aqueous S. exhibited flow steady shear which changed Newtonian thinning in range studied. Furthermore, such showed gel-like behaviour above 2% under small amplitude oscillatory measurements. Dynamic were explored by means pendant drop method (0.1–3 decrease significant elasticity monolayer adsorbed suggest may play role an emulsifier O/W emulsions.