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Research paper thumbnail of Hydrophobically modified polyelectrolytes used as reducing and stabilizing agent for the formation of gold nanoparticles

Colloid and Polymer Science, 2005

Research paper thumbnail of The Influence of Polyampholytes on the Phase Behavior of Microemulsion Used as Template for the Nanoparticle Formation

Journal of Dispersion Science and Technology, 2007

A series of hydrophobically modified polyampholytes has been synthesized by the copolymerization ... more A series of hydrophobically modified polyampholytes has been synthesized by the copolymerization of the cationic monomer (N,N 0-diallyl-N,N 0-dimethylammonium chloride) and the anionic monomers maleamic acid or butylmaleamic acid, and their influence on the inverse micellar region of the quaternary system sodium dodecylsulfate/toluene-pentanol (1:1)/water has been investigated. The polymers increase the water solubilization capacity of the microemulsion at a polymer concentration 5%. However, the polyampholytemodified inverse microemulsions show a temperature dependent behavior, by the formation at 408 8 8 8 8C of a narrow bicontinuous channel between the L 2 (w/o) and the L 1 (o/w) microemulsion phases. In this case, hydrophobic interactions between the surfactant alkyl tails and the hydrophobic side chains of the copolymer play an important role, too. The reverse microemulsion droplets were used as a template for the synthesis of BaSO 4 nanoparticles. The polymers, which are involved in the redispersion process, influence the size and the stability of the nanoparticles formed by preventing their aggregation. Finally, monodisperse BaSO 4 nanoparticles with an average size of 5 nm, thus, can be recovered and characterized by dynamic light scattering, zeta potential measurements, and transmission electron microscopy.

Research paper thumbnail of Hydrophobically modified polyelectrolytes used as reducing and stabilizing agent for the formation of gold nanoparticles

Colloid and Polymer Science, 2005

Research paper thumbnail of The Influence of Polyampholytes on the Phase Behavior of Microemulsion Used as Template for the Nanoparticle Formation

Journal of Dispersion Science and Technology, 2007

A series of hydrophobically modified polyampholytes has been synthesized by the copolymerization ... more A series of hydrophobically modified polyampholytes has been synthesized by the copolymerization of the cationic monomer (N,N 0-diallyl-N,N 0-dimethylammonium chloride) and the anionic monomers maleamic acid or butylmaleamic acid, and their influence on the inverse micellar region of the quaternary system sodium dodecylsulfate/toluene-pentanol (1:1)/water has been investigated. The polymers increase the water solubilization capacity of the microemulsion at a polymer concentration 5%. However, the polyampholytemodified inverse microemulsions show a temperature dependent behavior, by the formation at 408 8 8 8 8C of a narrow bicontinuous channel between the L 2 (w/o) and the L 1 (o/w) microemulsion phases. In this case, hydrophobic interactions between the surfactant alkyl tails and the hydrophobic side chains of the copolymer play an important role, too. The reverse microemulsion droplets were used as a template for the synthesis of BaSO 4 nanoparticles. The polymers, which are involved in the redispersion process, influence the size and the stability of the nanoparticles formed by preventing their aggregation. Finally, monodisperse BaSO 4 nanoparticles with an average size of 5 nm, thus, can be recovered and characterized by dynamic light scattering, zeta potential measurements, and transmission electron microscopy.

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