Cosolvent Effects on the Aggregation and Micellar Growth of Ester-Containing Gemini Surfactants

Javadian, Soheila; Lashgari, Shirin; Kakemam, Jamal; Aghdastinat, Hasti; Tehrani‐Bagha, Ali Reza

doi:10.1021/acs.jced.9b01132

Cited by 6 publications

(6 citation statements)

References 53 publications

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“…Phospholipids comprising liposomes, which have received considerable attention as drug carriers, consist of both hydrophobic and hydrophilic parts, such as surfactant molecules. The shape and size of micelles, − micelles stability, − and viscosity behavior − have become key factors in delivering medicine to affected areas. Recently, the ligand–receptor binding and capture efficiency for ligand-functionalized vesicles under Poiseuille flow have been reported using coarse-grained molecular simulation .…”

Section: Introductionmentioning

confidence: 99%

Effect of the Janus Amphiphilic Wall on the Viscosity Behavior of Aqueous Surfactant Solutions

2020

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The effects of the chemical nature of an interface are one of the key parameters which can affect self-assembly and rheological behavior. To date, several studies have reported selfassembled structures and rheological behaviors in the development of various functional materials. In this study, we investigated the self-assembly and viscosity behavior of aqueous surfactant solutions confined in three types of Janus amphiphilic nanotubes (JANTs), which have two, four, and eight sequential domains, respectively, using molecular simulation. We found that the viscosity behavior depends on the surfactant concentration and the chemical nature of the wall surface. For instance, although the concentration levels of the surfactants are the same (c = 10%), completely different viscosity behaviors were observed in the two sequential domains (Newtonian-like) and the four and eight sequential domains (strong shear-thinning) of the JANTs. Our simulations demonstrated how the rheological properties of aqueous surfactant solutions, including viscosity and velocity profiles, can be controlled by the chemical nature of the JANT wall surface, effect of confinement, and their self-assembly structures. Considering the foregoing, we hope that our study offers new knowledge on nanofluid systems.

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Section: Introductionmentioning

confidence: 99%

Effect of the Janus Amphiphilic Wall on the Viscosity Behavior of Aqueous Surfactant Solutions

2020

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“…It can be reasonably explained that the thermal motion of Vi-Si 3 pyrCl intensifies with the increase of the temperature. On the contrary, the β values of Vi-Si 3 minCl and Ph-Si 3 minCl increase with the increase of the temperature caused by the intermolecular interactions. ,− …”

Section: Resultsmentioning

confidence: 93%

“…Meanwhile, the break point on these κ– C curves corresponds to the cmc values. Below the cmc, the increase of κ is directly caused by the increasing number of free Vi-Si 3 min + /Vi-Si 3 pyr + /Ph-Si 3 min + and Cl – for Vi-Si 3 minCl, Vi-Si 3 pyrCl, and Ph-Si 3 minCl series, respectively, whereas at the high concentration (above the cmc), owing to the formation of aggregates, the increase rate of κ is smaller. − …”

Section: Resultsmentioning

confidence: 95%

Aggregation Behavior and Intermolecular Interaction of Cationic Trisiloxane Surfactants: Effects of Unsaturation

Chen

Tan

2020

Langmuir

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Imidazolium/pyridinium-based trisiloxane surfactants containing a phenyl or vinyl group in the hydrophobic siloxane chain, bis-(vinyldimethylsiloxy)methylsilylpropyl-pyridinium chloride (Vi-Si 3 pyrCl), bis-(vinyldimethylsiloxy)methylsilylpropyl-imidazolium chloride (Vi-Si 3 minCl), and bis(phenyldimethylsiloxy)methylsilylpropylimidazolium chloride (Ph-Si 3 minCl), were synthesized and confirmed by nuclear magnetic resonance (NMR) ( 1 H, 13 C, and 29 Si NMR), mass spectrometry, and Fourier transform infrared spectrometry. The effect of the phenyl/vinyl group on their micellization behavior was studied by surface tension, electric conductivity, dynamic light scattering, 2D nuclear Overhauser effect spectroscopy (NOESY) NMR, and transmission electron microscopy. Owing to the hydrophobicity of the siloxane groups and cationic head groups, the critical micelle concentration (cmc) values follow the order Ph-Si 3 minCl < Vi-Si 3 pyrCl < Vi-Si 3 minCl < Si 3 pyrCl. Ph-Si 3 minCl has a larger γ cmc value, resulting from the introduction of the phenyldimethylsiloxy unit (π−π stacking interaction). The β values of Vi-Si 3 minCl and Ph-Si 3 minCl increase with the increase in temperature, which is attributed to the intermolecular interaction which hinders the association of Cl − with the imidazolium ring and confirmed by 2D NOESY NMR. In aqueous solutions, the investigated cationic trisiloxane surfactants can self-assemble into spherical aggregates.

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“…Amongst the varied additives reported, study addressing alcohols has turned up to be very interesting. Alcohols exhibit different solution properties depending on its chain length i.e., the short-chain alcohols act as cosolvents, medium-chain alcohols act as cosolvents/ cosurfactants while long-chain alcohols act as cosurfactants [8, [23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Self‐assembly and solution behavior of cationic surfactants in water‐trifluoroethanol environment: An experimental and theoretical approach

Kumar,

Padsala,

Mayursing

et al. 2024

J Surfact & Detergents

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The micellization behavior of conventional cationic surfactant: tetradecyltrimethylammonium bromide (TTAB), and Gemini surfactant (GS): N,N′‐ditetradecyl‐N,N,N′,N′‐tetramethyl‐N,N′‐ethanediyl‐diammonium dibromide (14‐2‐14) in water and water‐trifluoroethanol (TFE) solvent mixture has been examined using tensiometric and small‐angle neutron scattering (SANS) techniques. Critical micelle concentration (CMC), and various interfacial parameters such as surface tension at CMC (γCMC), surface pressure at CMC (πCMC), maximum surface excess concentration (Γmax), and minimum area occupied by the head group (Amin) were evaluated for our examined systems at 303.15 K. It was observed that with the increase in TFE concentration, the CMC of the tested cationic surfactants decreased, thereby favoring the micellization in the presence of the surface‐active TFE. Furthermore, the geometry and aggregation number (Nagg) of surfactant micelles were inferred using SANS that revealed the decrease in micelle size of cationic surfactants. Additionally, the computational simulation study provided an insight into the molecular interactions in the examined system that validated our experimental findings.

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Cosolvent Effects on the Aggregation and Micellar Growth of Ester-Containing Gemini Surfactants

Cited by 6 publications

References 53 publications

Effect of the Janus Amphiphilic Wall on the Viscosity Behavior of Aqueous Surfactant Solutions

Effect of the Janus Amphiphilic Wall on the Viscosity Behavior of Aqueous Surfactant Solutions

Aggregation Behavior and Intermolecular Interaction of Cationic Trisiloxane Surfactants: Effects of Unsaturation

Self‐assembly and solution behavior of cationic surfactants in water‐trifluoroethanol environment: An experimental and theoretical approach

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