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Effect of counterion valency and ionic strength on polyelectrolyte adsorption
YKI – Ytkemiska institutet.
1994 (Engelska)Ingår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 10, s. 1580-1583Artikel i tidskrift (Refereegranskat)
Abstract [en]

The adsorption of cationic polyelectrolytes onto negatively charged mica from solutions of variable ionic strength was studied using the interferometric surface force technique. The results show that the structure of the adsorbed layer of polyelectrolyte is strongly dependent on the ionic strength of the solution from which the initial adsorption takes place, rather than the valency of the counter-ion. Within the time for one experiment (1 week) it was not feasible to achieve the same layer structure by a stepwise increase of the ionic strength, as was obtained when the adsorption of the polyelectrolyte was carried out directly from the solution of the higher ionic strength. A mechanism for attraction due to counter-ion-bridges when large, flexible counter-ions are present in the solution is suggested.

Ort, förlag, år, upplaga, sidor
1994. Vol. 10, s. 1580-1583
Nationell ämneskategori
Naturvetenskap
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URN: urn:nbn:se:ri:diva-27278OAI: oai:DiVA.org:ri-27278DiVA, id: diva2:1054282
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A889Tillgänglig från: 2016-12-08 Skapad: 2016-12-08 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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