Related Experiment Video
Updated: Dec 31, 2025

Molecular Entanglement and Electrospinnability of Biopolymers
Published on: September 3, 2014
Viscoelasticity of olive oil/water Pickering emulsions stabilized with starch nanocrystals
Xiaoli Qian1, Yu Lu1, Wenyuan Xie2
1School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu Province, 225002, PR China.
Abstract:
The olive oil-in-water Pickering emulsions stabilized with starch nanocrystal (SNC) were prepared for the morphological and rheological studies. Different kinds of shear flows were applied and the viscoelastic responses of emulsions were detected in terms of SNC concentrations (0.2-2.0 wt%) and surface acetylation levels (0.11-0.41° of substitution). The results show that the emulsifying capacity of SNC is improved evidently after surface acetylation due to decreased surface hydrophilicity of SNC and to enhanced electrostatic repulsive effect during emulsification, which is evidenced by the gelation behavior in small amplitude oscillatory shear (SAOS) flow. The modulus and viscosity of the emulsion with acetylated SNC increase by about two orders of magnitude as compared to those of the emulsion with pristine one. The former even shows weak overshoot behavior during large amplitude oscillatory shear (LAOS) flow. This work provides valuable information on motivating development of the Pickering emulsions using SNC as particle emulsifier.
Related Concept Videos
Colloids
Colloids and Suspensions
Surface Tension, Capillary Action, and Viscosity
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
Viscosity
The SI unit of viscosity is...
Viscosity of Fluid
Elastic Strain Energy for Shearing Stresses

