Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different Hydrophobicity
Wormlike surfactant micelles are widely used in various applications including fracturing technology in oil industry, template synthesis of different nanoobjects, micellar copolymerization of hydrophilic and hydrophobic monomers, and so forth. Most of those applications suggest the solubilization of...
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/24/4445 |
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| author | Andrey V. Shibaev Alexander S. Ospennikov Elizaveta K. Kuznetsova Alexander I. Kuklin Teimur M. Aliev Valentin V. Novikov Olga E. Philippova |
| author_facet | Andrey V. Shibaev Alexander S. Ospennikov Elizaveta K. Kuznetsova Alexander I. Kuklin Teimur M. Aliev Valentin V. Novikov Olga E. Philippova |
| author_sort | Andrey V. Shibaev |
| collection | DOAJ |
| description | Wormlike surfactant micelles are widely used in various applications including fracturing technology in oil industry, template synthesis of different nanoobjects, micellar copolymerization of hydrophilic and hydrophobic monomers, and so forth. Most of those applications suggest the solubilization of different additives in the micelles. The present paper is aimed at the comparative study of the effect of the solubilization of hydrophobic (n-decane and 1-phenylhexane) and hydrophilic (N-isopropylacrylamide and acrylamide) substances on the rheological properties and structure of the micelles using several complementary techniques including rheometry, small angle neutron scattering, dynamic light scattering, and diffusion ordered NMR spectroscopy. For these studies, mixed micelles of potassium oleate and n-octyltrimethylammonium bromide containing the excess of either anionic or cationic surfactants were used. It was shown that hydrophobic additives are completely solubilized inside the micelles being localized deep in the core (n-decane, 1-phenylhexane) or near the core/corona interface (1-phenylhexane). At the same time, only a small fraction of hydrophilic additives (14% of N-isopropylacrylamide and 4% of acrylamide) penetrate the micelles being localized at the corona area. Despite different localization of the additives inside the micelles, all of them induce the breaking of wormlike micelles with the formation of either ellipsoidal microemulsion droplets (in the case of hydrophobic additives) or ellipsoidal surfactant micelles (in the case of hydrophilic additives). The breaking of micelles results in the drop of viscosity of the solution up to water value. The main result of this paper consists in the observation of the fact that for all the additives under study, the dependences of the viscosity on the volume fraction of additive lie on the same master curve being shifted along the volume fraction axis by a certain factor depending on the hydrophobicity of the added species. Those data are quite useful for various applications of wormlike surfactant micelles suggesting the solubilization of different additives inside them. |
| first_indexed | 2024-03-09T16:01:26Z |
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| id | doaj.art-8cbf58bbe28d42c0aa020c83595f6953 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T16:01:26Z |
| publishDate | 2022-12-01 |
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| series | Nanomaterials |
| spelling | doaj.art-8cbf58bbe28d42c0aa020c83595f69532023-11-24T17:04:30ZengMDPI AGNanomaterials2079-49912022-12-011224444510.3390/nano12244445Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different HydrophobicityAndrey V. Shibaev0Alexander S. Ospennikov1Elizaveta K. Kuznetsova2Alexander I. Kuklin3Teimur M. Aliev4Valentin V. Novikov5Olga E. Philippova6Physics Department, Moscow State University, 119991 Moscow, RussiaPhysics Department, Moscow State University, 119991 Moscow, RussiaPhysics Department, Moscow State University, 119991 Moscow, RussiaFrank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, RussiaA. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, RussiaMoscow Institute of Physics and Technology, 141701 Dolgoprudny, RussiaPhysics Department, Moscow State University, 119991 Moscow, RussiaWormlike surfactant micelles are widely used in various applications including fracturing technology in oil industry, template synthesis of different nanoobjects, micellar copolymerization of hydrophilic and hydrophobic monomers, and so forth. Most of those applications suggest the solubilization of different additives in the micelles. The present paper is aimed at the comparative study of the effect of the solubilization of hydrophobic (n-decane and 1-phenylhexane) and hydrophilic (N-isopropylacrylamide and acrylamide) substances on the rheological properties and structure of the micelles using several complementary techniques including rheometry, small angle neutron scattering, dynamic light scattering, and diffusion ordered NMR spectroscopy. For these studies, mixed micelles of potassium oleate and n-octyltrimethylammonium bromide containing the excess of either anionic or cationic surfactants were used. It was shown that hydrophobic additives are completely solubilized inside the micelles being localized deep in the core (n-decane, 1-phenylhexane) or near the core/corona interface (1-phenylhexane). At the same time, only a small fraction of hydrophilic additives (14% of N-isopropylacrylamide and 4% of acrylamide) penetrate the micelles being localized at the corona area. Despite different localization of the additives inside the micelles, all of them induce the breaking of wormlike micelles with the formation of either ellipsoidal microemulsion droplets (in the case of hydrophobic additives) or ellipsoidal surfactant micelles (in the case of hydrophilic additives). The breaking of micelles results in the drop of viscosity of the solution up to water value. The main result of this paper consists in the observation of the fact that for all the additives under study, the dependences of the viscosity on the volume fraction of additive lie on the same master curve being shifted along the volume fraction axis by a certain factor depending on the hydrophobicity of the added species. Those data are quite useful for various applications of wormlike surfactant micelles suggesting the solubilization of different additives inside them.https://www.mdpi.com/2079-4991/12/24/4445wormlike surfactant micellesviscositysolubilizationdiffusion-ordered NMR spectroscopy (DOSY) |
| spellingShingle | Andrey V. Shibaev Alexander S. Ospennikov Elizaveta K. Kuznetsova Alexander I. Kuklin Teimur M. Aliev Valentin V. Novikov Olga E. Philippova Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different Hydrophobicity Nanomaterials wormlike surfactant micelles viscosity solubilization diffusion-ordered NMR spectroscopy (DOSY) |
| title | Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different Hydrophobicity |
| title_full | Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different Hydrophobicity |
| title_fullStr | Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different Hydrophobicity |
| title_full_unstemmed | Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different Hydrophobicity |
| title_short | Universal Character of Breaking of Wormlike Surfactant Micelles by Additives of Different Hydrophobicity |
| title_sort | universal character of breaking of wormlike surfactant micelles by additives of different hydrophobicity |
| topic | wormlike surfactant micelles viscosity solubilization diffusion-ordered NMR spectroscopy (DOSY) |
| url | https://www.mdpi.com/2079-4991/12/24/4445 |
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