Adsorption of poly‐4‐vinylpyridine onto glass surfaces

Peyser, Paul; Ullman, Robert

doi:10.1002/pol.1965.100030911

Cited by 10 publications

(13 citation statements)

References 12 publications

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“…In many experiments the total amount of adsorbed polymer per unit area Γ is measured as function of the physical characteristics of the system such as the charge fraction f , the pH of the solution or the salt concentration c salt [91]- [98]. This quantity can be easily obtained from our scaling expressions yielding…”

Section: Low-salt Regime D ≪ κ −1 and ψ S = Constantmentioning

confidence: 99%

Polyelectrolytes in Solution and at Surfaces

Netz

Andelman

2003

Encyclopedia of Electrochemistry

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This chapter deals with charged polymers (polyelectrolytes) in solution and at surfaces. The behavior of polyelectrolytes is markedly different from that of neutral polymers. In bulk solutions, i.e. disregarding the surface effect, there are two unique features to charged polymers: first, due to the presence of long-ranged electrostatic repulsion between charged monomers, the polymer conformations are much more extended, giving rise to a very small overlap concentration and high solution viscosity. Second, the presence of a large number of counter-ions increases the osmotic pressure of polyelectrolyte solutions, making such polymers water soluble as is of great importance to many applications. At surfaces, the same interplay between monomer-monomer repulsion and counter-ion degrees of freedom leads to a number of special properties. In particular, the adsorption behavior depends on both the concentration of polymers and added salt in the bulk. We first describe the adsorption behavior of single polyelectrolyte molecules, and discuss the necessary conditions to obtain an adsorbed layer and characterize its width. Depending on the stiffness of the polyelectrolyte, the layer can be flat and compressed or coiled and extended. We then proceed and discuss the adsorption of polyelectrolytes from semi-dilute solutions. Mean-field theory profiles of polyelectrolyte adsorption are calculated as function of surface charge density (or surface potential), the amount of salt in the system and the charge fraction on the chains. The phenomenon of charge inversion is reviewed and its relevance to the formation of multilayers is explained. The review ends with a short overview of the behavior of grafted polyelectrolytes.

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Section: Low-salt Regime D ≪ κ −1 and ψ S = Constantmentioning

confidence: 99%

Polyelectrolytes in Solution and at Surfaces

Netz

Andelman

2003

Encyclopedia of Electrochemistry

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“…In many experiments, the total amount of polymer surface excess Γ is measured as a function of the bulk polymer concentration, pH and/or ionic strength of the bulk solution [178]- [185]. (For reviews see, e.g.…”

Section: Adsorption Of Polyelectrolytes -Mean Fieldmentioning

confidence: 99%

Neutral and charged polymers at interfaces

2003

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Chain-like macromolecules (polymers) show characteristic adsorption properties due to their flexibility and internal degrees of freedom, when attracted to surfaces and interfaces. In this review we discuss concepts and features that are relevant to the adsorption of neutral and charged polymers at equilibrium, including the type of polymer/surface interaction, the solvent quality, the characteristics of the surface, and the polymer structure. We pay special attention to the case of charged polymers (polyelectrolytes) that have a special importance due to their water solubility. We present a summary of recent progress in this rapidly evolving field. Because many experimental studies are performed with rather stiff biopolymers, we discuss in detail the case of semi-flexible polymers in addition to flexible ones. We first review the behavior of neutral and charged chains in solution. Then, the adsorption of a single polymer chain is considered. Next, the adsorption and depletion processes in the many-chain case are reviewed. Profiles, changes in the surface tension and polymer surface excess are presented. Mean-field and corrections due to fluctuations and lateral correlations are discussed. The force of interaction between two adsorbed layers, which is important in understanding colloidal stability, is characterized. The behavior of grafted polymers is also reviewed, both for neutral and charged polymer brushes.

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“…For example, many colloidal suspensions can be stabilized by the adsorption of polyelectrolytes. In many experiments, the total amount of polymer adsorbed on a surface (the polymer surface excess) is measured as a function of the bulk polymer concentration, pH and/or ionic strength of the bulk solution [1][2][3][4][5][6][7][8]. (For reviews see, e.g., refs.…”

Section: Introductionmentioning

confidence: 99%