Polyelectrolyte Adsorption on Solid Surfaces: Theoretical Predictions and Experimental Measurements
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چکیده
منابع مشابه
Polyelectrolyte adsorption on solid surfaces: theoretical predictions and experimental measurements.
This work utilizes a combination of theory and experiments to explore the adsorption of two different cationic polyelectrolytes onto oppositely charged silica surfaces at pH 9. Both polymers, poly(diallyldimethylammonium chloride), PDADMAC, and poly(4-vinyl N-methylpyridinium iodide), PVNP, are highly charged and highly soluble in water. Another important aspect is that a silica surface carries...
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We present an experimental and theoretical study to provide further insight into the mechanism of CO chemisorption on 2 carbonaceous surfaces. The differential heat of CO adsorption at low and high coverages was determined in the temperature 2 range 553–593 K. We found that the heat profile has two distinct energetic zones that suggest two different adsorption processes. In the low-coverage reg...
متن کاملPolyelectrolyte adsorption
The problem of charged polymer chains (polyelectrolytes) as they adsorb on a planar surface is addressed theoretically. We review the basic mechanisms and theory underlying polyelectrolyte adsorption on a single surface in two situations: adsorption of a single charged chain, and adsorption from a bulk solution in θ solvent conditions. The behavior of flexible and semi-rigid chains is discussed...
متن کاملPolyelectrolyte adsorption
2014 The adsorption of uncharged polymers is, due to numerous efforts over past decades, fairly well understood. Some insight exists into the structure of the adsorbed layer, and the effect of the important parameters molecular weight, solvency and polymer/surface interaction has been investigated. Theory and experiment are beginning to converge. The polyelectrolyte adsorption process, however,...
متن کاملPolyelectrolyte Adsorption on Charged Substrate
The behavior of a polyelectrolyte adsorbed on a charged substrate of high-dielectric constant is studied by both Monte-Carlo simulation and analytical methods. It is found that in a low enough ionic strength medium, the adsorption transition is first-order where the substrate surface charge still keeps repulsive. The monomer density at the adsorbed surface is identified as the order parameter. ...
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ژورنال
عنوان ژورنال: Langmuir
سال: 2013
ISSN: 0743-7463,1520-5827
DOI: 10.1021/la4020702