Calcium Mediated Polyelectrolyte Adsorption on Like-Charged Surfaces

Turesson, Martin; Labbez, Christophe; Nonat, André

doi:10.1021/la2030846

Cited by 64 publications

(52 citation statements)

References 67 publications

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“…However, only recently some groups have started to explore the interaction between polyelectrolyte and like-charged membranes. [31][32][33] This study can lead to important applications in future.…”

Section: Introductionmentioning

confidence: 83%

Simulations of Polyelectrolyte Adsorption to a Dielectric Like-Charged Surface

2016

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We explore, using recently developed efficient Monte Carlo simulation method, interaction of anionic polyelectrolyte solution with a like-charged membrane. In addition to polyions, solution also contains salt with either monovalent, divalent, or trivalent counterions. In agreement with recent experimental observations, we find that multivalent counterions can lead to strong adsorption of polyions to a like charged surface.On the other hand, addition of 1:1 electrolyte diminishes the adsorption induced by the multivalent counterions. Dielectric discontinuity at the interface is found to play only a marginal role for the polyion adsorption.

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Section: Introductionmentioning

confidence: 83%

Simulations of Polyelectrolyte Adsorption to a Dielectric Like-Charged Surface

2016

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“…The carboxylic groups provide negative charges to the backbones in basic solutions, which promote their adsorption thanks to the charge reversal of the tricalcium silicate surface at high pH and/or in the presence of calcium ions. 70 The nonadsorbing side chains induce steric repulsion, responsible for the dispersive effect. 36,37 One of the main advantages of using PCEs is that their molecular structure can be modified to target the expected performances in terms of adsorption as well as dispersion.…”

Section: Sidebar 1 Pce Structure and Chemistrymentioning

confidence: 99%

Molecular and submolecular scale effects of comb‐copolymers on tri‐calcium silicate reactivity: Toward molecular design

Marchon

Juilland²,

Gallucci³

et al. 2017

J Am Ceram Soc

124

110

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The impact of organic compounds on the processing and reactivity of inorganic materials has been a source of inspiration for materials scientists for decades and continues to trigger novel and innovative applications in a broad range of disciplines. However, molecular design of such compounds to reach targeted properties remains challenging, particularly for reactive and multicomponent systems. This outstanding challenge is met here by combining a model cement, hosting different coupled reactions of dissolution, nucleation and growth, together with combcopolymers that offer large and well-controlled variations of their molecular architecture. We show that silicate reactivity is affected by a combination of molecular and submolecular scale effects of these polymers. The first can be described by scaling laws from polymer physics, whereas the second involves specific chemical interactions. In particular, the ability of these polymers to hinder dissolution appears to be crucial, something for which strong experimental evidence is provided. K E Y W O R D Scalcium silicate,

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“…The practical relevance of polyion adsorption has generated substantial theoretical [6][7][8][9][10][11][12][13][14][15][16][17][18][19] and experimental 6,16,[20][21][22][23][24][25][26][27][28][29][30][31][32] efforts. As mentioned above, surface interactions in polyelectrolyte solutions can often be regulated by increasing or decreasing the addition of simple salt.…”

Section: Introductionmentioning

confidence: 99%

Polyelectrolyte Adsorption on Solid Surfaces: Theoretical Predictions and Experimental Measurements

Xie¹,

Nylander²,

Piculell³

et al. 2013

Langmuir

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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 Nmethylpyridinium iodide), PVNP, are highly charged, and highly soluble in water. Another important aspect is that a silica surface carries a relatively high surface charge density, at this pH level. This means that we have specifically chosen to investigate adsorption under conditions where electrostatics can be expected to dominate the interactions. Of specific focus in this work is the response of the adsorption to the addition of simple salt, i.e. a process * To whom correspondence should be addressed 1 where electrostatics is gradually screened out. Theoretical predictions from a recently developed correlation-corrected classical density functional theory for polyelectrolytes, are evaluated by direct quantitative comparisons with corresponding experimental data, as obtained by ellipsometry measurements. We find that, at low concentrations of simple salt, the adsorption increases with ionic strength, reaching a maximum at intermediate levels (about 200 mM). The adsorption then drops, but retains a finite level even at very high salt concentrations, indicating the presence of non-electrostatic contributions to the adsorption. In the theoretical treatment, the strength of this relatively modest, but otherwise largely unknown, non-electrostatic surface affinity, was estimated by matching predicted and experimental slopes of adsorption curves at high ionic strength. Given these estimates for the non-electrostatic part, experimental adsorption data are essentially captured with quantitative accuracy by the classical density functional theory.

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Calcium Mediated Polyelectrolyte Adsorption on Like-Charged Surfaces

Cited by 64 publications

References 67 publications

Simulations of Polyelectrolyte Adsorption to a Dielectric Like-Charged Surface

Simulations of Polyelectrolyte Adsorption to a Dielectric Like-Charged Surface

Molecular and submolecular scale effects of comb‐copolymers on tri‐calcium silicate reactivity: Toward molecular design

Polyelectrolyte Adsorption on Solid Surfaces: Theoretical Predictions and Experimental Measurements

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