Solvent relaxation NMR can be used to investigate polymer adsorption to nanoparticles. Here we outline recent studies where there is competition for polymer adsorption by different surfaces; this is of particular interest in industrial formulations, which usually contain a wide range of components. Figure 1 shows the situation in which there is competition between particles with different surface chemistries. The relaxation rate was predicted for each adsorption scenario, and we found that PVP is preferentially adsorbed to silica particles.

R2sp vs particle concentration

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Last edited: Friday September 10, 2010

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