NMR solvent relaxation studies on concentrated particulate dispersions

Cosgrove, Terence, Jack, Kevin S., Green, Nicholas, Obey, Timothy M. and Wood, Matthew (1999). NMR solvent relaxation studies on concentrated particulate dispersions. In Srinivas Manne and Gregory G. Warr (Ed.), Supramolecular Structure in Confined Geometries (pp. 153-168) Washington, DC, U.S.A.: American Chemical Society. doi:10.1021/bk-1999-0736.ch010


Author Cosgrove, Terence
Jack, Kevin S.
Green, Nicholas
Obey, Timothy M.
Wood, Matthew
Title of chapter NMR solvent relaxation studies on concentrated particulate dispersions
Title of book Supramolecular Structure in Confined Geometries
Place of Publication Washington, DC, U.S.A.
Publisher American Chemical Society
Publication Year 1999
Sub-type Other
DOI 10.1021/bk-1999-0736.ch010
Series ACS Symposium Series
ISBN 9780841236158; 0841236151; 9780841217348; 0841217343; 0097-6156; 1947-5918
Editor Srinivas Manne
Gregory G. Warr
Volume number 736
Chapter number 10
Start page 153
End page 168
Total pages 16
Total chapters 17
Language eng
Formatted Abstract/Summary
The technique of 1H NMR solvent relaxation has been used to probe the effect of the adsorption of polymers at particle/water interfaces. On inorganic oxide surfaces the pure water relaxation was strongly enhanced but on a latex surface, the effect was much weaker due to its more hydrophobic character. The effect of polymer adsorption on all the oxide materials studied increased the specific relaxation weight of water: the effect for poly (vinyl pyrrolidone) (PVP) adsorption on silica was much stronger than for poly(ethylene oxide) (PEO) and in a competitive adsorption study the PVP was found to displace the PEO. On a clay surface, a strong molecular weight effect was found on the bound solvent probability (p). Similar data for a series of PEO samples with a similar molecular weight but different end groups and for a cyclic polymer also showed very different effects. The results are discussed in terms of different surface conformations. The NMR method is shown to be a very simple tool to measure competitive adsorption.
© 1999 American Chemical Society
Q-Index Code B1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Book Chapter
Collection: Centre for Microscopy and Microanalysis Publications
 
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Created: Tue, 01 Mar 2011, 16:48:10 EST by Dr Kevin Jack on behalf of Centre for Microscopy and Microanalysis