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Электронный каталог: Krakovsky, I. - Investigation of the Interaction of Ionic Surfactants with Epoxy-Based Hydrogels by SANS
Krakovsky, I. - Investigation of the Interaction of Ionic Surfactants with Epoxy-Based Hydrogels by SANS
Статья
Автор: Krakovsky, I.
Langmuir [Electronic resource]: Investigation of the Interaction of Ionic Surfactants with Epoxy-Based Hydrogels by SANS
б.г.
ISBN отсутствует
Автор: Krakovsky, I.
Langmuir [Electronic resource]: Investigation of the Interaction of Ionic Surfactants with Epoxy-Based Hydrogels by SANS
б.г.
ISBN отсутствует
На полку
Статья
Krakovsky, I.
Investigation of the Interaction of Ionic Surfactants with Epoxy-Based Hydrogels by SANS / I.Krakovsky, T.V.Tropin, O.I.Ivankov, V.Petrenko. – Text: electronic // Langmuir. – 2025. – Vol. 41, No. 6. – P. 3895-3908. – URL: https://pubs.acs.org/doi/epdf/10.1021/acs.langmuir.4c04062. – Bibliogr.: P.3906-3908.
We investigated the effect of two ionic surfactants on thecomposition and structure of hydrogels obtained by swelling an epoxy amphiphilicpolymer network (APN) using a combination of gravimetry and small-angleneutron scattering (SANS). Stoichiometric epoxy APN was synthesized by thereaction of diamino and diepoxy-terminated polypropylene (POP) and polyoxy-ethylene (POE). Sub- and supercritical solutions of surfactants with either cationic(myristyltrimethylammonium bromide (C&sub(14)TAB)) or anionic (sodium dodecylsulfate (SDS)) headgroups in heavy water were used in the preparation of thehydrogels. At supercritical concentrations, SDS exhibited a much stronger effect onthe composition and structure of the hydrogels than C&sub(14)TAB. The details of thehydrogel structure were deduced by general analysis and fitting of the experimentalSANS profiles to two model scattering functions exploiting the Percus−Yevick hard-sphere (HS) model and rescaled mean sphericalapproximation (RMSA), respectively. In the former model, valid for the hydrogels prepared in low concentrated surfactant solutions,spherical domains of average radius of ca. 39−45 Å from a highly swollen network dispersed in a matrix of a poorly swollen networkmixed with the bound alkyl surfactant tails were revealed. In the latter model, hydrogels prepared in surfactant solutions ofsufficiently high concentrations consist of surfactant micelles dispersed in a matrix of a highly swollen network. The average radii ofthe C&sub(14)TAB and SDS micelles formed in the hydrogels were ca. 28 and 17 Å, respectively. The strong binding of surfactant tails withPOP chains and dragging of large amounts of highly mobile counterions inside the hydrogels were responsible for the effectsobserved. This study provides important information about the surfactant organization inside polymer hydrogels, which is importantfor their applications.
ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 342 г1 - Замедление и диффузия нейтронов. Дифракция
Krakovsky, I.
Investigation of the Interaction of Ionic Surfactants with Epoxy-Based Hydrogels by SANS / I.Krakovsky, T.V.Tropin, O.I.Ivankov, V.Petrenko. – Text: electronic // Langmuir. – 2025. – Vol. 41, No. 6. – P. 3895-3908. – URL: https://pubs.acs.org/doi/epdf/10.1021/acs.langmuir.4c04062. – Bibliogr.: P.3906-3908.
We investigated the effect of two ionic surfactants on thecomposition and structure of hydrogels obtained by swelling an epoxy amphiphilicpolymer network (APN) using a combination of gravimetry and small-angleneutron scattering (SANS). Stoichiometric epoxy APN was synthesized by thereaction of diamino and diepoxy-terminated polypropylene (POP) and polyoxy-ethylene (POE). Sub- and supercritical solutions of surfactants with either cationic(myristyltrimethylammonium bromide (C&sub(14)TAB)) or anionic (sodium dodecylsulfate (SDS)) headgroups in heavy water were used in the preparation of thehydrogels. At supercritical concentrations, SDS exhibited a much stronger effect onthe composition and structure of the hydrogels than C&sub(14)TAB. The details of thehydrogel structure were deduced by general analysis and fitting of the experimentalSANS profiles to two model scattering functions exploiting the Percus−Yevick hard-sphere (HS) model and rescaled mean sphericalapproximation (RMSA), respectively. In the former model, valid for the hydrogels prepared in low concentrated surfactant solutions,spherical domains of average radius of ca. 39−45 Å from a highly swollen network dispersed in a matrix of a poorly swollen networkmixed with the bound alkyl surfactant tails were revealed. In the latter model, hydrogels prepared in surfactant solutions ofsufficiently high concentrations consist of surfactant micelles dispersed in a matrix of a highly swollen network. The average radii ofthe C&sub(14)TAB and SDS micelles formed in the hydrogels were ca. 28 and 17 Å, respectively. The strong binding of surfactant tails withPOP chains and dragging of large amounts of highly mobile counterions inside the hydrogels were responsible for the effectsobserved. This study provides important information about the surfactant organization inside polymer hydrogels, which is importantfor their applications.
ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 342 г1 - Замедление и диффузия нейтронов. Дифракция
