Adsorption of gelatin to a polystyrene/water interface as a function of concentration, pH, and ionic strength.

Turner, S. F. and Clarke, S. M. and Rennie, A. R. and Thirtle, P. N. and Li, Z. X. and Thomas, R. K. and Langridge, S. and Penfold, J. (2005) Adsorption of gelatin to a polystyrene/water interface as a function of concentration, pH, and ionic strength. Langmuir, 21. pp. 10082-10088. DOI 10.1021/la050256o

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Abstract

The technique of neutron reflection has been used to investigate the adsorption of R-enriched gelatin from aqueous solution onto spun polystyrene substrates. Neutron reflection can provide information about the distribution of material perpendicular to an interface as well as total adsorbed amounts. The adsorbed layers were found to have maximum density at the surface, decaying with distance into solution. The adsorbed amount, layer thickness, and density were all seen to increase with solution concentration. Temperature was found to have little effect on adsorption. Thicker, less dense layers were observed at high pH and thinner, denser layers were observed at low pH, but the total adsorbed amount did not change significantly. The presence of sodium chloride had little effect on the adsorbed layers. The results are discussed in the context of other studies and the known amino acid sequence of R-gelatin.

Item Type:	Article
Uncontrolled Keywords:	2005 AREP 2005 P BPI IA49
Subjects:	99 - Other
Divisions:	99 - Other
Journal or Publication Title:	Langmuir
Volume:	21
Page Range:	pp. 10082-10088
Identification Number:	10.1021/la050256o
Depositing User:	Sarah Humbert
Date Deposited:	13 Aug 2010 10:58
Last Modified:	23 Jul 2013 09:59
URI:	http://eprints.esc.cam.ac.uk/id/eprint/1857

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