Complexation between dodecyl sulfate surfactant and zein protein in solution.
Interactions between sodium dodecyl sulfate and zein protein, a model system for the understanding of the effect of surfactants on skin, were investigated using a range of techniques involving UV-vis spectroscopy, TOC (total organic carbon analysis), electrophoresis, and static and dynamic light scattering. Zein protein was solubilized by SDS. The adsorption of SDS onto insoluble protein fraction caused the zeta potential of the complex to become more negative. From these values, we calculated the Gibbs energy of absorption, which decreases when the SDS concentration is raised. Finally the structure of the complex, based on the analysis by static and dynamic light scattering, is proposed to be rod like.
Ruso
Juan M
JM
NSF IUCR Center for Advanced Studies in Novel Surfactants, Langmuir Center for Colloid and Interfaces, Columbia University, New York, New York 10027, USA.
Deo
Namita
N
Somasundaran
P
P
D000327:Adsorption; D008027:Light; D012542:Scattering, Radiation; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry* / Q000528:radiation effects; D012996:Solutions / Q000737:chemistry / Q000528:radiation effects; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry* / Q000528:radiation effects; D015028:Zein / Q000737:chemistry* / Q000528:radiation effects
D012996:Solutions; D013501:Surface-Active Agents; D012967:Sodium Dodecyl Sulfate; D015028:Zein