AI Article Synopsis
- The study presents a new method to create stable montmorillonite-protein complexes by using proteins from hen-egg albumen.
- Analysis through techniques like SDS-PAGE, XRD, and TEM shows that specific proteins adsorb onto the clay surface, leading to the breakdown of clay stacks into smaller platelets.
- Additionally, when the protein-to-silicate ratio exceeds 20, the proteins cause the platelets to reaggregate into larger, disordered particles, with size measurements indicating significant differences in particle size based on the protein interaction.
Article Abstract
In the study we demonstrate a method to obtain stable, exfoliated montmorillonite-protein complexes by adsorption of the proteins extracted from hen-egg albumen. Analysis of the process by means of sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) revealed that the complexes are formed by sequential adsorption of ovotransferrin, ovalbumins, ovomucoid and lysozyme on the surface of the silicate. Structural studies performed by X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicated that the adsorption of ovotransferrin and albumins is accompanied by disintegration of clay stacks into discrete platelets. Further analysis by dynamic light scattering (DLS) revealed that at protein to silicate weight ratios exceeding 20, the synergistic adsorption of albumen components leads to reaggregation of silicate platelets into disordered, microgel-like particles. By means of DLS it was found that exfoliation predominantly leads to formation of particles with average hydrodynamic radii (R(h)) of 0.19 μm while their aggregation causes formation of particles having R(h) in of approx. 0.5 μm and larger.
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| http://dx.doi.org/10.1016/j.jcis.2012.02.009 | DOI Listing |
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