Linked Life Data

9803940

Source:http://linkedlifedata.com/resource/pubmed/id/9803940

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5-6
pubmed:dateCreated
1999-2-24
pubmed:abstractText
Surfactant adsorption layers on polystyrene latex particles are investigated concerning their equilibrium exchange dynamics with surfactant molecules in solution. Pulsed field gradient (PFG) nuclear magnetic resonance (NMR) self-diffusion measurements of the nonionic surfactant C12(EO)5 are performed, making use of the difference of the diffusion coefficients of adsorbed and free surfactant in solution. On variation of the gradient pulse spacing the echo decay data show a transition from fast to slow exchange, giving the possibility of a quantitative evaluation. A two-site model is applied to fit the data and obtain average residence times of the surfactant in both sites. The results are consistent with diffusion-controlled adsorption of surfactant monomers and additional micellar contributions to the exchange, whereas no evidence for kinetic barriers is found for these nonionic surfactants on the relevant timescale (10 ms).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0730-725X
pubmed:author
pubmed:issnType
Print
pubmed:volume
16
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
683-5
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:articleTitle
Exchange dynamics of surfactants in adsorption layers investigated by PFG NMR diffusion.
pubmed:affiliation
Chemical Center, University of Lund, Sweden. monika.schonhoff@fkem1.lu.se
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't