| Форма представления | Статьи в зарубежных журналах и сборниках |
| Год публикации | 2020 |
| Язык | английский |
|
Зуев Юрий Федорович, автор
Кусова Александра Михайловна, автор
Сальников Вадим Владимирович, автор
Туранов Александр Николаевич, автор
|
|
Исхакова Алина Камильевна, автор
|
| Библиографическое описание на языке оригинала |
Zueva O.S., Kusova A.M., Makarova A.O., Turanov A., Iskhakovan A. Salnikov V.V., Zuev Y.F. Reciprocal effects of multi-walled carbon nanotubes and oppositely charged surfactants in bulk water and at interfaces. Colloids and Surfaces A, Volume 603, 20 October 2020, 125296. DOI: 10.1016/j.colsurfa. |
| Аннотация |
In this work we made the complementary use of nuclear magnetic resonance spectroscopy, dynamic light
scattering, electric conductivity and surface tension methods to study the micellization of cationic surfactants
cetyl trimethylammonium bromide (CTAB) and dodecyltrimethylammonium bromide (DTAB), as well as anionic
surfactant sodium dodecyl sulfate (SDS) in the presence of multi-walled carbon nanotubes (CNT). It was shown
that the CNTs is effectively dispersed in water medium due to the adsorption of surfactant ions at CNT surface.
The NMR spectral analysis (chemical shifts and line broadening) specified that surfactants interact with CNTs
surface both by alkyl chains and by charged head groups. For cationic CTAB and DTAB this interaction occurs
mainly through methylene (CH 2 ) n groups of alkyl radicals, at the same time, the anionic SDS interacts with the
CNTs surface by terminal methyl groups (CH 3 ). Interaction specificity of cationic and anionic surfactants leads to
their different structural organization to CNT surface. Experimental observations make it possible to propose the
model where the attraction of cationic DTAB and CTAB positively charged head groups with negatively charged
CNT surface results to the orientation of cationic surfactants along CNT surface. In contrast to positively charged
DTAB and CTAB the repulsion of SDS with negatively charged head group from CNT surface and contacted SDS
terminal groups results in the normal orientation of anionic surfactant to CNT surface. The consistency of
proposed orientation model arrived from conductivity study of surfactant-CNT dispersions. According to con-
ductivity data, the non-micellized cationic surfactants follow complete dissociation in the presence of CNT no
matter are they free or bound to CNT. On the contrary the absence of complete dissociation of anionic surfactant
in the pre-micellar systems may be the result of SDS ordering on CNT surface and forming the charged surface
with double electric layer binding the portion of counter-ions. |
| Ключевые слова |
Multi-walled carbon nanotubes (CNTs), Water dispersions, Cationic and anionic surfactants, Adsorption, Superficial ordering |
| Название журнала |
Colloids and Surfaces A: Physicochemical and Engineering Aspects
|
| URL |
https://doi.org/10.1016/j.colsurfa.2020.125296 |
| Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на эту карточку |
https://repository.kpfu.ru/?p_id=239185 |
Полная запись метаданных  |
| Поле DC |
Значение |
Язык |
| dc.contributor.author |
Зуев Юрий Федорович |
ru_RU |
| dc.contributor.author |
Кусова Александра Михайловна |
ru_RU |
| dc.contributor.author |
Сальников Вадим Владимирович |
ru_RU |
| dc.contributor.author |
Туранов Александр Николаевич |
ru_RU |
| dc.contributor.author |
Исхакова Алина Камильевна |
ru_RU |
| dc.date.accessioned |
2020-01-01T00:00:00Z |
ru_RU |
| dc.date.available |
2020-01-01T00:00:00Z |
ru_RU |
| dc.date.issued |
2020 |
ru_RU |
| dc.identifier.citation |
Zueva O.S., Kusova A.M., Makarova A.O., Turanov A., Iskhakovan A. Salnikov V.V., Zuev Y.F. Reciprocal effects of multi-walled carbon nanotubes and oppositely charged surfactants in bulk water and at interfaces. Colloids and Surfaces A, Volume 603, 20 October 2020, 125296. DOI: 10.1016/j.colsurfa. |
ru_RU |
| dc.identifier.uri |
https://repository.kpfu.ru/?p_id=239185 |
ru_RU |
| dc.description.abstract |
Colloids and Surfaces A: Physicochemical and Engineering Aspects |
ru_RU |
| dc.description.abstract |
In this work we made the complementary use of nuclear magnetic resonance spectroscopy, dynamic light
scattering, electric conductivity and surface tension methods to study the micellization of cationic surfactants
cetyl trimethylammonium bromide (CTAB) and dodecyltrimethylammonium bromide (DTAB), as well as anionic
surfactant sodium dodecyl sulfate (SDS) in the presence of multi-walled carbon nanotubes (CNT). It was shown
that the CNTs is effectively dispersed in water medium due to the adsorption of surfactant ions at CNT surface.
The NMR spectral analysis (chemical shifts and line broadening) specified that surfactants interact with CNTs
surface both by alkyl chains and by charged head groups. For cationic CTAB and DTAB this interaction occurs
mainly through methylene (CH 2 ) n groups of alkyl radicals, at the same time, the anionic SDS interacts with the
CNTs surface by terminal methyl groups (CH 3 ). Interaction specificity of cationic and anionic surfactants leads to
their different structural organization to CNT surface. Experimental observations make it possible to propose the
model where the attraction of cationic DTAB and CTAB positively charged head groups with negatively charged
CNT surface results to the orientation of cationic surfactants along CNT surface. In contrast to positively charged
DTAB and CTAB the repulsion of SDS with negatively charged head group from CNT surface and contacted SDS
terminal groups results in the normal orientation of anionic surfactant to CNT surface. The consistency of
proposed orientation model arrived from conductivity study of surfactant-CNT dispersions. According to con-
ductivity data, the non-micellized cationic surfactants follow complete dissociation in the presence of CNT no
matter are they free or bound to CNT. On the contrary the absence of complete dissociation of anionic surfactant
in the pre-micellar systems may be the result of SDS ordering on CNT surface and forming the charged surface
with double electric layer binding the portion of counter-ions. |
ru_RU |
| dc.language.iso |
ru |
ru_RU |
| dc.subject |
Multi-walled carbon nanotubes (CNTs) |
ru_RU |
| dc.subject |
Water dispersions |
ru_RU |
| dc.subject |
Cationic and anionic surfactants |
ru_RU |
| dc.subject |
Adsorption |
ru_RU |
| dc.subject |
Superficial ordering |
ru_RU |
| dc.title |
Reciprocal effects of multi-walled carbon nanotubes and oppositely charged surfactants in bulk water and at interfaces |
ru_RU |
| dc.type |
Статьи в зарубежных журналах и сборниках |
ru_RU |
|
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