Abstract
As basic raw materials for the formation of biodegradable film, the protein extracted from okara is inferior due to less number in amino acids versus soy protein. Sodium dodecyl sulfate and sodium silicate were tested to improve the nature of protein of this source.
Compared with the addition of sodium dodecyl sulfate to the film forming solution, the addition of sodium silicate improved remarkably the physical properties of the produced films. From the fact that the addition of sodium dodecyl sulfate to the film forming solution induced the formation of hydrophilic amino acids, while the addition of sodium silicate induced the formation of hydrophobic ones, it seems that the physical properties of the okara protein film were improved by the induction of these hydrophobic amino acids, mainly, the resistance to water vapor permeability.
