New insights into the structure of polyelectrolyte complexes

Gärdlund, Linda; Wågberg, Lars; Norgren, Magnus

doi:10.1016/j.jcis.2007.03.075

Cited by 33 publications

(29 citation statements)

References 35 publications

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“…Comparing the QCM-D and SPAR values gives an approximate water content of the complexes of 66% at pH 7. This is of the same order of magnitude as found earlier for these types of complexes [17], assuming that the immobilized water detected in the QCM-D experiments is localized solely inside the complexes.…”

Section: The Influence Of Ph On the Adsorption Of Pecssupporting

confidence: 85%

“…Huygens" software (Dullware, the Netherlands), employing a fourlayer optical model, assuming a PEC layer thickness of 5 nm and a dn/dc value of 0.232 L/kg, calculated as outlined in Gärdlund et al [17]. The measurements were made using the same procedure as in the QCM-D measurements.…”

Section: Stagnation Point Adsorption Reflectometry (Spar)mentioning

confidence: 99%

“…Earlier investigations [17] found that free polyelectrolyte can cause significant disturbances in adsorption studies if, for example, a stagnation point adsorption setup is used in which fresh polyelectrolyte is constantly fed to the boundary of the stagnation point. To prepare PECs as free as possible of unreacted polyelectrolyte, the complexes used for SPAR adsorption measurements were ultrafiltered.…”

Section: Influence Of Filtration On the Properties Of Jet-mixed Complmentioning

confidence: 99%

“…In this model, the adsorbed polymer is assumed to be distributed in a homogeneous layer on the surface and the change in the polarizability of the surface layer is directly related to the refractive index increment of the adsorbed species. Since the PECs are spherical [17], a surface theoretically fully saturated with PEC would still not be completely covered with polymer because the packing of spherical objects does not allow for 100% coverage.…”

Section: Adsorption Behavior Of Polyelectrolyte Complexesmentioning

confidence: 99%

See 3 more Smart Citations

Using jet mixing to prepare polyelectrolyte complexes: Complex properties and their interaction with silicon oxide surfaces

Ankerfors

Ondaral

Wågberg

et al. 2010

Journal of Colloid and Interface Science

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Section: The Influence Of Ph On the Adsorption Of Pecssupporting

confidence: 85%

Section: Stagnation Point Adsorption Reflectometry (Spar)mentioning

confidence: 99%

Section: Influence Of Filtration On the Properties Of Jet-mixed Complmentioning

confidence: 99%

Section: Adsorption Behavior Of Polyelectrolyte Complexesmentioning

confidence: 99%

See 2 more Smart Citations

Using jet mixing to prepare polyelectrolyte complexes: Complex properties and their interaction with silicon oxide surfaces

Ankerfors

Ondaral

Wågberg

et al. 2010

Journal of Colloid and Interface Science

Self Cite

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“…They result from an electrostatic binding between oppositely charged chains, with counterions release (Michaels et al, 1965;Sukhorukov et al, 1998;Petrov et al, 2003;Dautzenberg and Kriz, 2003;Schatz et al, 2004;Ga¨rdlund et al, 2007;Saether et al, 2008). PEC can be composed of natural and/or synthetic polyions, charged surfactants, etc.…”

Section: Introductionmentioning

confidence: 99%

Formation of Soft NanoparticlesviaPolyelectrolyte Complexation: A Viscometric Study

Rondon

Argillier

Moan

et al. 2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Nous avons aussi mesure´la viscosite´relative des suspensions; la fraction volumique des particules a pu eˆtre estime´e en faisant l'hypothe`se que la contribution des particules et du polycation en exce`s sont inde´pendantes. Nous avons pu e´tablir l'e´volution de la stoechiome´trie des PEC et de leur fraction volumique en fonction du ratio PAH/PSS dans le me´lange initial et du pH. Nos re´sultats montrent que l'accessibilite´des charges (conformation des chaines) de´termine a`la fois la stoechiome´trie et le niveau de compaction des complexes.Abstract -Formation of Soft Nanoparticles via Polyelectrolyte Complexation: A Viscometric Study -This paper describes the formation of soft nanoparticles resulting from electrostatically driven complexation of oppositely charged polyelectrolytes. The system was composed of a strong polyanion (PolyStyrene Sulfonate, PSS) and a weak polycation (Poly(Allylamine) Hydrochloride, PAH) in large excess. Soft nanoparticles were obtained by pouring a PSS solution into a PAH one under constant stirring. The PolyElectrolyte Complexes (PEC) were characterized through a viscometric study complemented by Dynamic Light Scattering (DLS), electrophoretic mobility and suspension turbidity measurements. PEC suspensions were centrifuged and by measuring the viscosity of the supernatant, we were able to estimate the free polycation concentration and hence the percentage of complexed polycation. We also measured the relative viscosity of the suspensions; from the estimated contribution of the PEC particles and of the polycation in excess, the average particle volume fraction was estimated. From all viscometric data, we could derive the evolution of the binding stoichiometry in PEC and of the effective particle volume fraction as a function of the mixing ratio (ratio of the cationic to anionic groups) and of the pH. Our results emphasize the importance of charge accessibility in controlling both the stoichiometry and packing density of the complexes.

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Sizing, Shaping and Pharmaceutical Applications of Polyelectrolyte Complex Nanoparticles

Müller

2012

Advances in Polymer Science

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New insights into the structure of polyelectrolyte complexes

Cited by 33 publications

References 35 publications

Using jet mixing to prepare polyelectrolyte complexes: Complex properties and their interaction with silicon oxide surfaces

Using jet mixing to prepare polyelectrolyte complexes: Complex properties and their interaction with silicon oxide surfaces

Formation of Soft NanoparticlesviaPolyelectrolyte Complexation: A Viscometric Study

Sizing, Shaping and Pharmaceutical Applications of Polyelectrolyte Complex Nanoparticles

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