Download Formation and Properties of Clay-Polymer Complexes by B. K. G. Theng PDF
By B. K. G. Theng
Formation and homes of Clay-Polymer Complexes presents a accomplished account of the reactions among clay minerals and natural polymers. The booklet opens with a dialogue of the buildings of universal clay minerals, clays colloid chemistry, and the behaviour of natural polymers at clay surfaces. this can be by way of a scientific remedy of advanced formation among clay minerals and diverse periods of man-made and of course happening polymers, an outline of the houses of the ensuing complexes and, anyplace acceptable, their sensible purposes. The publication can have a brand new separate bankruptcy on clay-polymer nanocomposites. each one bankruptcy is written as a self-contained overview paper, giving a listing of connection with the unique literature.
- Describes the $64000 improvement in clay-polymer nanocomposites
- Contains new figures and diagrams
- Extenisve revision of the former edition
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Extra info for Formation and Properties of Clay-Polymer Complexes
Sample text
1977. Density and structure of allophane. Clay Minerals, 1 2 : 2 89-2 98. , 1975. Vermiculites. E. Gieseking (Editor), Soil Components, Vol. 2. Inorganic Components. Springer Verlag, Berlin, pp. 155-189. F. , 1961. Complexes of vermiculite with amino acids. Nature (London), 1 9 1 : 1389. E. , 1973. The Chemistry of Clay Minerals. Elsevier, Amsterdam, 213 pp. , 1958. Der Kationenaustausch bei den Mineralen der Glimmer-, Vermikulitund Montmorillonitgruppe. Zeitschrift fur Anorganische und Allgemeine Chemie, 297: 257-286.
This is particularly 40 true when porous adsorbents, such as clays, are used. Equilibrium is normally assumed t o have been attained when the amount of polymer in solution remains sensibly constant with time. g. 1) been examined, where the quantities in brackets refer to concentration, and the subscripts b and s to the bulk (solution) and surface (adsorbed) phases, respectively. 1) is shifted far t o the right and this is reflected in the small temperature effect of the process and in the shape of the isotherm, as described below.
It may be disrupted by raising the pH of, or by adding polyanions to, the suspension through which treatments the positive edge charge is neutralised and then reversed. 2% w/v) Na’-montmorillonite suspension enhances particle dispersion or dissociation as indicated by a reduction in viscosity of the system (Van Olphen, 1963). Although the diffuse double layers are thereby slightly compressed, the resulting decrease in edge-to-face interaction apparently exceeds that in face-to-face interaction, leading t o a breakdown of the cardhouse structure.