Stabilization of Gold Nanoparticles with Block Copolymers of Styrene and 4-Vinylpyridine Synthesized by Reversible Chain Transfer Polymerization

Derikov, Y.I.; Yablanovich, A.D.; Litmanovich, E.A.; Amarantov, S.V.; Chernikova, E.V.; Kudryavtsev, Y.V.

Авторы: Derikov Y.I., Yablanovich A.D., Litmanovich E.A., Amarantov S.V., Chernikova E.V., Kudryavtsev Y.V.
Журнал: Polymer Science, Series B
Том: 63
Номер: 6
Год издания: 2021
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 882
Последняя страница: 893
DOI: 10.1134/s1560090421060087
Аннотация: The behavior of composites based on block copolymers of styrene and 4-vinylpyridine andspherical gold nanoparticles in dimethylformamide is studied by static and dynamic light scattering, as well as small-angle X-ray scattering. In the absence of nanoparticles, the copolymer with a molar mass of about 104 g/mol synthesized by controlled radical reversible chain transfer polymerization forms micelles from a small number of chains in a medium that is a good solvent for both blocks. At the same time, the sol of nanoparticles stabilized with tetraoctylammonium bromide in dimethylformamide forms flocculestens of nanometers in size. The addition of the block copolymer leads to the destruction of floccules and stabilization of nanoparticles in micelles with a radius of about 5 nm. An even more efficient way to obtain stable composites is the ligand exchange of a low molecular mass nanoparticle stabilizer for the block copolymer in a tetrahydrofuran–ethanol mixed solvent. Such a composite has good film-forming ability, and the concentration of gold nanoparticles in it can be increased by centrifugation to at least 43 wt %.After the transfer of the composite to dimethylformamide, micelles with a wide size distribution are formed, the average size of which is about 10 nm. The stabilizing ability of the block copolymer decreases with a decrease in the content of 4-vinylpyridine units which provide interaction with the surface of gold nanoparticles.
Добавил в систему: Черникова Елена Вячеславовна

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Stabilization of Gold Nanoparticles with Block Copolymers of Styrene and 4-Vinylpyridine Synthesized by Reversible Chain Transfer Polymerizationстатья

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