Amphiphilic polymers of N-vinylpyrrolidone and their protective properties during the formation of metal nanoparticles

The possibility of using amphiphilic polymers of N-vinylpyrrolidone as polymer protectors of metal nanoparticles is researched. When metal ions are reduced in aqueous solutions of the corresponding salts in the presence of amphiphilic polymers, copper nanoparticles with a diameter of 4-12 nm or pall...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-09, Vol.919 (2), p.22046
Main Authors: Ostaeva, G Yu, Morenko, I V, Isaeva, I Yu, Eliseeva, E A, Kuskov, A N
Format: Article
Language:English
Subjects:
Aqueous solutions
Gold
Micelles
Nanoparticles
Oxidation resistance
Palladium
Polymers
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Summary:The possibility of using amphiphilic polymers of N-vinylpyrrolidone as polymer protectors of metal nanoparticles is researched. When metal ions are reduced in aqueous solutions of the corresponding salts in the presence of amphiphilic polymers, copper nanoparticles with a diameter of 4-12 nm or palladium particles with a diameter of 3-5 nm are formed. Nanoparticles are included in rather large aggregates of micelles of amphiphilic polymers. It was found that extremely stable sols are formed in the presence of amphiphilic polymers. In this case, the stability of sols to irreversible aggregation and oxidation of metal nanoparticles increases both with increasing length of the polymer's hydrophilic chains and with increasing length of hydrophobic fragments. In the presence of a low-molecular-weight electrolyte, particles with a smaller diameter are formed. However, the resistance of metal nanoparticles to oxidation is reduced by 6-10 times.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/919/2/022046