Abstract

The spacing between atoms and molecules at interfaces and within materials is extremely important in determining the properties of such interfaces and materials. In surfactant monolayers at the air-water interface, it has been shown that small changes in molecular packing lead to large changes in the interfacial properties. Changes in intermolecular distance as small as 0.04 Å have been attributed to the effect of mixing surfactants of different chain lengths. This paper discusses the effect of these sub-angstrom distance changes on foaming, micellar stability, melting points, bubble size, surface viscosity, lubrication, environmental remediation, enhanced oil recovery, and microemulsion stability that result from chain length compatibility.

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