Effect of EGCG and GA on the Interfacial Behavior of Zein Colloidal Particles
In this research,zein micelles by the antisolvent method were prepared combined with epigallocatechin gallate(EGCG)and gallic acid(GA),which contained various o-phenyltriol structural units.Dynamic light scattering,interfacial swelling rheology and Langmuir-Blodgett were used to comparatively study the effects of EGCG and GA on the surface properties and interfacial behavior of zein micelles.The results showed that EGCG and GA reduced the surface wettability by exposing the hydrophilic groups of zein micelles or masking hydrophobic groups of zein.The stronger interactions between EGCG and zein led to the formation of a denser structure,which significantly reduced the particle size of zein micelles.At the same time,the reduction of surface hydrophobicity of micelles slowed down the high interfacial adsorption rate of zein particles.This caused the strong hydrophobicity,and prolonged the adsorption and rearrangement time of the composite particles at the oil/water interface.And it also formed an interfacial membrane with viscoelasticity.
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