✦ LIBER ✦

Adsorption Studies of Nonionic Surfactants onto Polyvinyltoluene Microlatexes in Aqueous Medium

✍ Scribed by J. Santhanalakshmi; S. Balaji

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 76 KB
Volume: 232
Category: Article
ISSN: 0021-9797
DOI: 10.1006/jcis.2000.7206

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✦ Synopsis

Negatively charged polyvinyltoluene (PVT) microlatexes of various dimensions were prepared by polymerization of the corresponding vinyltoluene-in-water microemulsion precursors containing sodium dodecyl sulfate and n-pentanol. PVT microlatexes were used as adsorbents for adsorption of nonionic surfactants such as Tween 80, Tween 20, and Triton X-100. The extents of adsorption were known from the differences in the diffusion coefficient of the PVT microlatexes containing a solubilized suitable electroactive probe. The surface excess ( ), equilibrium constant of adsorption (K ads ), molecular cross-sectional surface area (σ ), intercalation ratio (κ), etc., were determined for sodium dodecyl sulfate composition variation and ionic strength effects. A surface reconstruction model was proposed to rationalize the results.

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