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Article
Swelling-assisted reduction of chitosan molecular weight in the solid state using hydrogen peroxide
Chitosan in the solid state has been degraded in a controlled way by treatment with hydrogen peroxide at room temperature. Chitosan was swollen in diluted NaOH, making it more susceptible to the peroxide treat...
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Article
Effect of Various Parameters on the Stability of Silica Dispersions
For different practical applications, it is cardinal to maintain the stability of nanoparticles in aqueous suspension. The theoretical impact of pH and ultrasonication time on surface charge, particle size dis...
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Article
Polyelectrolyte-surfactant complexes and their influence on the wettability of different polymer surfaces
A novel method to modify the wettability of polymer surfaces is presented. It was found that the surface properties of polymers with different surface-free energies—polyamide 6.6, polypropylene, polyethylene a...
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Chapter
Polyelectrolyte Complexes in Flocculation Applications
This review concentrates on the interactions between oppositely charged polyelectrolytes and on the formation of complexes, which can be used for different applications such as paper retention or water treatme...
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Article
Silica microparticles surface coating by layer-by-layer or polyelectrolyte complex adsorption
This study follows the surface properties modification of some silica particles, by coating with complementary polyelectrolytes by layer-by-layer deposition or by the adsorption of preformed polyelectrolyte co...
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Article
Apparent dissociation constants of polycarboxylic acids in presence of polycations
The dissociation behaviour of poly(acrylic acid) and poly(ethylene-alt-maleic acid) has been investigated by both classical potentiometric titration and colloid titration as an alternative way. In the case of ...
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Article
Comparative rheological study of ionic semi-IPN composite hydrogels based on polyacrylamide and dextran sulphate and of polyacrylamide hydrogels
Ionic semi-interpenetrating polymer networks composite hydrogels were synthesized by free-radical polymerization using dextran sulphate (DxS), acrylamide as monomer and N,N′-methylene(bis)acrylamide as cross-link...
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Article
pH-sensitive nanostructured architectures based on synthetic and/or natural weak polyelectrolytes
This study aims to evidence the influence of polyelectrolytes structure and the number of double layers on the properties of some new nanostructured architectures formed by layer-by-layer self-assembly of comp...
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Article
Poly(dimethylaminoethylmethacrylate) hydrochloride (PDMAEM-HCl) a well behaving polycation for multilayer formation on planar surfaces
The polycation preparation of poly(dimethylaminoethylmethacrylate) hydrochloride and the multilayer formation in combination with poly(sodium 4-styrenesulphonate) as polyanion studies onto different substrates...
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Article
Influence of humic acid on the flocculation of clay
The aim of this study was to improve the flocculation of wastewater from gravel pits, especially the separation of the finely dispersed inorganic particles and the removing of humic acid. Clay was used as a mo...
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Chapter and Conference Paper
Dependence of the aggregation mode of two bidentate azo dyes in polycation/dye multilayers on the dye structure and the polycation conformation
In this paper we report the growth particularities of some polycation/azo dye multilayers built up by the alternate adsorption of one polycation with quaternary ammonium salt groups in the backbone (95 mol % of N...
