Surfaces, Interfaces, and Colloids: Principles and by Drew Myers

By Drew Myers

From the reports of the 1st variation: "The e-book has admirably met its acknowledged objective. the total gamut of floor and colloid technology has been offered in a accomplished demeanour with none undue oversimplification. the writer could be congratulated for his clarity." -Advanced fabrics Now in its moment variation, this paintings is still the only most precious advent to be had to the advanced quarter of floor and colloids technological know-how. specialist Drew Myers walks readers via suggestions, theories, and applications-keeping the maths to a minimal and featuring real-world case reviews to demonstrate key technological and organic techniques. He considerably reorganizes and updates the fabric to mirror the present kingdom of information within the box, delivering new chapters on absorption and organic structures as well as the real components of colloid balance, emulsions and foams, monolayer movies, surfactants, and wetting. This revision additionally boasts a far better index, greater than 2 hundred new line drawings, basic and particular bankruptcy bibliographies, and end-of-chapter difficulties. Geared to scientists, technologists, and scholars facing colloidal and floor platforms and their various commercial functions, the e-book imparts an knowing of the elemental features of surfaces, interfaces, and colloids, that's crucial for potent suggestions in assorted components of chemistry, physics, biology, drugs, engineering, and fabric sciences.

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Additional info for Surfaces, Interfaces, and Colloids: Principles and Applications, 2nd Edition

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In order for such a boundary to be stable it must possess an interfacial free energy such that work must be done to extend or enlarge the boundary or interface. If such is not the case, and if no other external forces such as gravity act to separate the phases by density, and other factors, then no energy will be required to increase the interfacial area and random forces, including the uncertainty principle, Brownian motion or the chaotic butterfly, will distort, fold, and convolute the interface until the phases become mixed.

The effects of the position of substitution on surfactant properties can be quite large and will be discussed in more detail later. If the original dodecanol is oxidized to dodecanoic acid (lauric acid) CH3(CH2)10COOH the compound still has limited solubility in water; however, when the acid is neutralized with alkali it becomes water soluble—a classic soap. The alkali carboxylate will be a reasonably good surfactant. , foaming and detergency) will improve significantly. By altering the balance between the hydrophobic group—the hydrocarbon chain or the ‘‘tail’’—and the hydrophilic group—the carboxylate or ‘‘head’’—one can gain effective control over the surfactant characteristics of a molecule and, in theory at least, design a molecule to meet the specific requirements of a system.

5. Schematic representation of a ‘‘spring’’ model of surface energy: (a) for the individual atom, location at the surface results in an unbalanced force pulling it into the bulk; (b) for the surface in general, the summation of the individual attraction for the units produces the net effect of surface tension or surface energy. general) than that due to springs in the adjacent phase. As a result, the interfacial molecules are pulled into the bulk (to the extent allowed by their finite size and repulsive interactions) and the net density of molecules in the surface region is decreased.

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