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Role of hydration and conformational changes in adsorption dynamics of ethyl(hydroxyethyl)cellulose at the air/solution interface
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1998 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 14, 3620-3624 p.Article in journal (Refereed)
Abstract [en]

Previous studies have discussed the kinetics of the reduction in surface tension of ethyl(hydroxyethyl)cellulose (EHEC) at the air/aqueous solution interface in terms of configuration changes involved in the transfer of individual polymer segments between soluted and adsorbed state. It was suggested that the process kinetics were governed by a substantially high activation barrier. In the present study, based on molecular mechanic simulations, it is shown that a nearly activation-free path between configurations exists for EHEC due to the extreme flexibility of the polymer chain. Hence, the relatively slow kinetics of the process should rather be attributed to the step-wise transformation between conformations which is expressed as a sequence of elementary processes involving a large number of intermediate steps. This occurs over an extended time period. Also, the configuration changes involved in the uncoiling of the polymer at the interface are related to the hydration effects.

Place, publisher, year, edition, pages
1998. Vol. 14, 3620-3624 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27249OAI: oai:DiVA.org:ri-27249DiVA: diva2:1054253
Note
A1180Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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