Interpolymer complexation: comparisons of bulk and interfacial structures

Langmuir : the ACS Journal of Surfaces and Colloids
Beatrice CattozStuart W Prescott

Abstract

The interactions between the strong polyelectrolyte sodium poly(styrenesulfonate), NaPSS, and the neutral polymer poly(vinylpyrrolidone), PVP, were investigated in bulk and at the silica/solution interface using a combination of diffusion nuclear magnetic resonance spectroscopy (NMR), small-angle neutron scattering (SANS), solvent relaxation NMR, and ellipsometry. We show for the first time that complex formation occurs between NaPSS and PVP in solution; the complexes formed were shown not to be influenced by pH variation, whereas increasing the ionic strength increases the complexation of NaPSS but does not influence the PVP directly. The complexes formed contained a large proportion of NaPSS. Study of these interactions at the silica interface demonstrated that complexes also form at the nanoparticle interface where PVP is added in the system prior to NaPSS. For a constant PVP concentration and varying NaPSS concentration, the system remains stable until NaPSS is added in excess, which leads to depletion flocculation. Surface complex formation using the layer-by-layer technique was also reported at a planar silica interface.

References

Dec 1, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·William E Smith, Charles F Zukoski
Feb 21, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Charlie FloodPatricia Revell
Aug 13, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Joseph B Schlenoff
Oct 1, 2010·Chemical Society Reviews·Georgina K SuchFrank Caruso
Jan 7, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Alexander ShovskyPer M Claesson
Jun 28, 2011·Advanced Drug Delivery Reviews·Melgardt M de VilliersYuri M Lvov
Dec 23, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Beatrice CattozStuart W Prescott
Mar 23, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Beatrice CattozStuart W Prescott
Nov 10, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Catherine L CooperStuart W Prescott
Sep 26, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Catherine L CooperStuart W Prescott

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Citations

Jul 13, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Zengyi WeiStuart W Prescott

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