Interpolymer Complexation: Comparisons of Bulk and Interfacial Structures

Beatrice Cattoz, Wiebe Matthijs de Vos, Terence Cosgrove, Martin Crossman, Youssef Espidel, Stuart W. Prescott

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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
Original languageEnglish
Pages (from-to)4151-4159
JournalLangmuir
Volume31
Issue number14
DOIs
Publication statusPublished - 2015

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Keywords

  • METIS-313189
  • IR-98106

Cite this

Cattoz, B., de Vos, W. M., Cosgrove, T., Crossman, M., Espidel, Y., & Prescott, S. W. (2015). Interpolymer Complexation: Comparisons of Bulk and Interfacial Structures. Langmuir, 31(14), 4151-4159. https://doi.org/10.1021/la503870b