Transfer of electroactive agents of different molecular size through the polyelectrolyte membranes

Elżbieciak-Wodka, Magdalena; Kolasińska-Sojka, Marta; Wodka, Dawid; Nowak, Paweł; Warszyński, Piotr

doi:10.1016/j.jelechem.2011.07.039

Cited by 10 publications

(7 citation statements)

References 45 publications

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“…where the numerical value refers to water at room temperature. This expression can be obtained from eqn (23) by setting the exponential factor and the resistance function to unity. Experimentally observed aggregation rates in the fast regime are normally comparable to the Smoluchowski value, but they are oen somewhat smaller.…”

Section: Particle Aggregation Induced By Polyelectrolytesmentioning

confidence: 99%

“…[19][20][21] Such coatings may be used to control surface properties, including wetting, lubrication, adhesion, or biological resistance. 22,23 Certain PEs offer the possibility to tune these properties through external stimuli, such as temperature or solution composition. 24,25 PEs interact strongly with solid substrates, and in turn, they may substantially alter the respective surface characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Polyelectrolyte adsorption, interparticle forces, and colloidal aggregation

et al. 2014

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This review summarizes the current understanding of adsorption of polyelectrolytes to oppositely charged solid substrates, the resulting interaction forces between such substrates, and consequences for colloidal particle aggregation. The following conclusions can be reached based on experimental findings. Polyelectrolytes adsorb to oppositely charged solid substrates irreversibly up to saturation, whereby loose and thin monolayers are formed. The adsorbed polyelectrolytes normally carry a substantial amount of charge, which leads to a charge reversal. Frequently, the adsorbed films are laterally heterogeneous. With increasing salt levels, the adsorbed mass increases leading to thicker and more homogeneous films. Interaction forces between surfaces coated with saturated polyelectrolyte layers are governed at low salt levels by repulsive electric double layer interactions, and particle suspensions are stable under these conditions. At appropriately high salt levels, the forces become attractive, principally due to van der Waals interactions, but eventually also through other forces, and suspensions become unstable. This situation can be rationalized with the classical theory of Derjaguin, Landau, Verwey, and Overbeek (DLVO). Due to the irreversible nature of the adsorption process, stable unsaturated layers form in colloidal particle suspensions at lower polyelectrolyte doses. An unsaturated polyelectrolyte layer can neutralize the overall particle surface charge. Away from the charge reversal point, electric double layer forces are dominant and particle suspensions are stable. As the charge reversal point is approached, attractive van der Waals forces become important, and particle suspensions become unstable. This behaviour is again in line with the DLVO theory, which may even apply quantitatively, provided the polyelectrolyte films are sufficiently laterally homogeneous. For heterogeneous films, additional attractive patch-charge interactions may become important. Depletion interactions may also lead to attractive forces and suspension destabilization, but such interactions become important only at high polyelectrolyte concentrations.

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Section: Particle Aggregation Induced By Polyelectrolytesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyelectrolyte adsorption, interparticle forces, and colloidal aggregation

et al. 2014

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“…Polyelectrolyte coatings are important in many technological applications, such as the stabilization of colloidal dispersions, the fabrication of antifouling coatings, the performance of shampoos and conditioning formulations in cosmetics, or the modification of the wettability of separation membranes [1][2][3][4]. This widespread use of polyelectrolyte coatings or layers in science and technology is due to the ability of most charged polymers to modify the surface properties of the substrates, such as the wettability, lubrication, adhesion or biological resistance [5,6]. The relevance and impact of polyelectrolyte layers has fostered extensive research, both experimental [7][8][9] and theoretical [10][11][12][13], for disentangling the driving forces governing the deposition process and their effects on the physico-chemical properties and structure of the surfaces [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Deposition of Synthetic and Bio-Based Polycations onto Negatively Charged Solid Surfaces: Effect of the Polymer Cationicity, Ionic Strength, and the Addition of an Anionic Surfactant

Hernández-Rivas

Guzmán

Fernández‐Peña

et al. 2020

Colloids and Interfaces

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The deposition of layers of different polycations (synthetic or derived from natural, renewable resources) onto oppositely charged surfaces has been studied using ellipsometry and quartz crystal microbalance with dissipation monitoring (QCM-D). Information about the thickness of the deposited layers and their water content was ascertained. The adsorption of the different polycations onto negatively charged surfaces was found to be a complex process, which is influenced by the chemical nature of the polymer chains, ionic strength, polymer concentration and the addition of additives such as surfactants. The experimental picture shows a good agreement with theoretical calculations performed using the Self-Consistent Mean Field (SCF) approach. The results show that the electrostatically-driven deposition can be tuned by modifying the physico-chemical properties of the solutions and the chemical nature of the adsorbed polymer. This versatile approach is a big step forward in aiding the design of new polymers for many industrial applications and, in particular, the design of sustainable washing formulations for cosmetic applications.

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“…Many variables have strong influence on the buildup process of polyelectrolyte multilayers, like: solvent quality of polyelectrolytes [36], pH [37], temperature [31] and ionic strength [38,39]. Since the physico-chemical properties of multilayer films greatly depend on the conditions in which films grow, it is very important to understand how those parameters govern their structure.…”

Section: Introductionmentioning

confidence: 99%