From reverse worms to reverse vesicles formed by mixed zwitterionic and non-ionic surfactants in cyclohexane

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15694-15700 ◽  
Author(s):  
Ge Yang ◽  
Jianxi Zhao
Keyword(s):  
Wormlike Micelles ◽  
Ionic Surfactants ◽  
Reverse Vesicles

SB-12 with C12E4 forms reverse wormlike micelles or reverse vesicles in cyclohexane depending on the ratio of C12E4 to SB-12.

scholarly journals Analytical modeling of micelle growth. 4. Molecular thermodynamics of wormlike micelles from ionic surfactants: Theory vs. experiment

2021 ◽  
Vol 584 ◽  
pp. 561-581 ◽  
Author(s):  
Krassimir D. Danov ◽  
Peter A. Kralchevsky ◽  
Rumyana D. Stanimirova ◽  
Simeon D. Stoyanov ◽  
Joanne L. Cook ◽  
...  
Keyword(s):  
Analytical Modeling ◽  
Wormlike Micelles ◽  
Ionic Surfactants ◽  
Molecular Thermodynamics

Polymer-like Wormlike Micelles of Ionic Surfactants: Structure and Rheological Properties

2019 ◽  
Vol 61 (2) ◽  
pp. 215-225 ◽  
Author(s):  
Alexander L. Kwiatkowski ◽  
Vyacheslav S. Molchanov ◽  
Olga E. Philippova
Keyword(s):  
Rheological Properties ◽  
Wormlike Micelles ◽  
Ionic Surfactants

Adsorption of ionic and non-ionic surfactants by wool charring waste

1981 ◽  
Vol 31 (1) ◽  
pp. 395-400 ◽  
Author(s):  
Francis Perineau ◽  
Antoine Gaset
Keyword(s):  
Ionic Surfactants

Artemisinin (ART) Drug Delivery Using Mixed Non-ionic Surfactants and Evaluation of Their Efficiency in Different Cancer Cell Lines

2017 ◽  
Vol 4 (4) ◽  
Author(s):  
Elnaz Asgharkhani ◽  
Aazam Najmafshar ◽  
Mohsen Chiani
Keyword(s):  
Zeta Potential ◽  
Cell Line ◽  
Mtt Assay ◽  
Therapeutic Index ◽  
Stability Study ◽  
Polydispersity Index ◽  
Ionic Surfactants ◽  
Cytotoxicity Test ◽  
Molar Ratios ◽  
Chemotherapy Agent

This study aims to investigate the effects of different non-ionic surfactants on physicochemical properties of ART niosomes. ART is a natural compound that is used as an antimalarial and chemotherapy agent in medicine. ART has low bioavailability, stability and solubility. In order to solve these problems and enhancing the efficiency of the drug, nanotechnology was used. In the present study, several niosomal formulations of ART prepared using different molar ratios of Span 60 : Tween 60 : PEG-600: ART in PBS. These three formulations were FI (1:1:0.5:0.5), FII (2:1:0.5:0.5) and FIII (1:2:0.5:0.5), respectively. The encapsulation efficiency was measured by HPLC and the drug release was evaluated by dialysis method. The cytotoxicity test was determined by MTT assay. The size, zeta potential and polydispersity index of the vesicles was measured by Zeta Sizer. Stability study was performed within two months. The MTT assay results showed that cytotoxicity effect of these formulations on MCF-7 cell line is better than C6 cell line and the FIII had the best results for both of them. The entrapment efficiencies of the formulations I, II and III were obtained 82.2±1.88%, 75.5±0.92% and 95.5±1.23%, respectively. The results of size, zeta potential and polydispersity index indicated that the size of the vesicles is below 200 nm, their surface charge is about -35 mV and they were monodisperse. Stability and release study indicated that the formulation III has the best stability and release pattern. Therefore, the use of PEGylated niosomal ART can effectively improve its therapeutic index, stability and solubility.

Probing the Dynamic Self-Assembly Behaviour of Photoswitchable Wormlike Micelles in Real Time

2018 ◽  
Author(s):  
Elaine A. Kelly ◽  
Judith E. Houston ◽  
Rachel Evans
Keyword(s):  
Real Time ◽  
Absorption Spectroscopy ◽  
Self Assembly ◽  
Uv Light ◽  
Wormlike Micelles ◽  
Tetraethylene Glycol ◽  
Light Illumination ◽  
First Time ◽  
Dependent Processes

Understanding the dynamic self-assembly behaviour of azobenzene photosurfactants (AzoPS) is crucial to advance their use in controlled release applications such as<i></i>drug delivery and micellar catalysis. Currently, their behaviour in the equilibrium <i>cis-</i>and <i>trans</i>-photostationary states is more widely understood than during the photoisomerisation process itself. Here, we investigate the time-dependent self-assembly of the different photoisomers of a model neutral AzoPS, <a>tetraethylene glycol mono(4′,4-octyloxy,octyl-azobenzene) </a>(C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>) using small-angle neutron scattering (SANS). We show that the incorporation of <i>in-situ</i>UV-Vis absorption spectroscopy with SANS allows the scattering profile, and hence micelle shape, to be correlated with the extent of photoisomerisation in real-time. It was observed that C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>could switch between wormlike micelles (<i>trans</i>native state) and fractal aggregates (under UV light), with changes in the self-assembled structure arising concurrently with changes in the absorption spectrum. Wormlike micelles could be recovered within 60 seconds of blue light illumination. To the best of our knowledge, this is the first time the degree of AzoPS photoisomerisation has been tracked <i>in</i><i>-situ</i>through combined UV-Vis absorption spectroscopy-SANS measurements. This technique could be widely used to gain mechanistic and kinetic insights into light-dependent processes that are reliant on self-assembly.

Nonaqueous Photorheological Fluids Based on Light-Responsive Reverse Wormlike Micelles

Langmuir ◽  
2010 ◽  
Vol 26 (8) ◽  
pp. 5405-5411 ◽  
Author(s):  
Rakesh Kumar ◽  
Aimee M. Ketner ◽  
Srinivasa R. Raghavan
Keyword(s):  
Wormlike Micelles ◽  
Photorheological Fluids
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