Concentrated reverse micelles in a random graft block copolymer system: structure and in-situ synthesis of silver nanoparticles

Rodríguez‐Abreu, Carlos; Lazzari, Massimo; Varade, Dharmesh; Kaneko, Masaya; Aramaki, Kenji; López‐Quintela, M. Arturo

doi:10.1007/s00396-006-1612-6

Cited by 18 publications

(13 citation statements)

References 38 publications

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“…It is known that siloxane-containing amphiphilic compounds substan- ), because of the very low cohesive energy of PDMS. [13] Based on this fact, we assumed that in the particular case of PDMS-containing copolymers, surface tension measurements in certain organic solvents may provide important information about micellization. One limiting condition would be that the surface tension of the solvent is high enough in order to allow proper experimental observation.…”

Section: Resultsmentioning

confidence: 99%

Micellization of a Siloxane‐Based Segmented Copolymer in Organic Solvents and its Use as a Tool for Metal Complex Nanoparticles

Racleş¹,

Cazacu²,

Ioanid³

et al. 2008

Macromol. Rapid Commun.

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The micellization of a polysiloxane‐ketimine has been studied in solvents of different polarity, i.e., dimethylformamide (DMF) and toluene. The critical micelle concentration was determined from surface tension measurements ‐in DMF‐, and from viscosity variation with concentration. Metal complex nanoparticles have been synthesized from this macromolecular ligand in DMF and in toluene, using the formed micelles as templates. Spectroscopic data (IR and UV‐vis) confirmed the metal complexation. TEM observations revealed the formation of nanoparticles with different morphologies, which were consistent with the assumed conformation of the ligand in solutions of the two selective solvents.magnified image

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Section: Resultsmentioning

confidence: 99%

Micellization of a Siloxane‐Based Segmented Copolymer in Organic Solvents and its Use as a Tool for Metal Complex Nanoparticles

Racleş¹,

Cazacu²,

Ioanid³

et al. 2008

Macromol. Rapid Commun.

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“…Apart from conventional applications of SS, recently they are also found to be useful in the synthesis of silver nanoparticles, [5] as a membrane material for cancerous cell, [6] as polymer gel electrolytes [7] in advanced devices like Li-ion batteries=solar cell. In all these advanced applications, the microcrystalline phase and association behavior of SS play a vital role in the presence of some other nonelectrolytes such as ethanol, formamide, urea, etc.…”

Section: Introductionmentioning

confidence: 99%

Nonelectrolyte-Induced Micellar Shape Changes in Aqueous Solutions of Silicone Surfactants

Soni

Vekariya

Sastry

et al. 2014

Journal of Dispersion Science and Technology

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Dynamic light scattering, cloud point (CP), and surface tension studies have been carried out to examine the influence of six (including two acetates, two alkoxyethanols, and two sugars) nonelectrolyte additives on two silicone surfactants based on poly (dimethyl siloxane)-graftpolyethers in aqueous solutions. The results indicate that the presence of alkoxyethanols induced the oblate ellipsoidal to spherical micellar transition, while sugars increase the size of the ellipsoidal micelles. The effect of cosolvent or additives on critical micelle concentration (CMC) and CP is discussed on the basis of water structure making and breaking effect. The thermodynamic and surface active parameters were calculated from the surface tension isotherm curves.

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“…At present, polymers are widely used for this purpose. Among stabilizers of silver nanoparticles there are homopolymers such as poly(ethylene glycol),9 poly(vinyl pyrrolidon),1 poly(pyridyl acetylene) etc.,10 amphiphilic block copolymers,11 graft copolymers,12 and polymeric‐inorganic hybrids 13, 14. Amphiphilic block and graft copolymers, which formed micellar structures, were used as stabilizers of silver nanodispersions mainly in organic mediums.…”

Section: Introductionmentioning

confidence: 99%

Syntheses of Silver Nanoparticles in the Matrices of Block and Graft Copolymers and Polymer‐Inorganic Hybrid in Aqueous Solutions

Fedorchuk

Zheltonozhskaya

Gomza

et al. 2012

Macromolecular Symposia

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In the present work we have synthesized two-component block-and graft copolymers MOPEO-b-PAAm, PAAm-b-PEO-b-PAAm and PVA-g-PAAm comprised methoxypoly(ethylene oxide), poly(ethylene oxide) or poly(vinyl alcohol) and chemically complementary polyacrylamide and also the grafted polymer-inorganic hybrid SiO 2 -g-PAAm based on monodispersed silica nanoparticles. These copolymers we used as special matrices in the process of borohydride reduction of Agþ ions. It was established the influence of chemical nature, molecular architecture and concentration of the matrices and the content of silver nitrate on some reaction parameters, size and stability of Ag-nanoparticles in aqueous solutions.

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Concentrated reverse micelles in a random graft block copolymer system: structure and in-situ synthesis of silver nanoparticles

Cited by 18 publications

References 38 publications

Micellization of a Siloxane‐Based Segmented Copolymer in Organic Solvents and its Use as a Tool for Metal Complex Nanoparticles

Micellization of a Siloxane‐Based Segmented Copolymer in Organic Solvents and its Use as a Tool for Metal Complex Nanoparticles

Nonelectrolyte-Induced Micellar Shape Changes in Aqueous Solutions of Silicone Surfactants

Syntheses of Silver Nanoparticles in the Matrices of Block and Graft Copolymers and Polymer‐Inorganic Hybrid in Aqueous Solutions

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