Ion Exchange of Cation-Terminated Poly(ethylene oxide) Chains on Mica Surfaces

✍ Scribed by Michael O. Geke; Ronald A. Shelden; Walter R. Caseri; Ulrich W. Suter

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 109 KB
• Volume: 189
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1997.4825

✦ Synopsis

well-defined end-group-to-surface interactions. Here, we ex-The adsorption of poly(ethylene oxide) on mica is promoted by amine the modification of mica surfaces with PEO chains cationic end groups. These cation-terminated polymers adsorb on having cationic end groups. The cationic PEO-mica system mica surfaces via ion exchange, resulting in a film of polymer is, we believe, a convenient and sensitive model system, attached to the layered silicate. The experimental ion exchange with a set of parameters that can be varied to test and extend isotherms resemble those for small cations, but with a much reexisting theories about end-tethered polymers at surfaces. duced surface-exchange capacity for the polymeric cations. The number of adsorbed chains decreases with increasing chain length while the mass adsorbed increases.