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

Wormlike Micelles

2017 ◽  
Keyword(s):  
Wormlike Micelles

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.

Molecular Basis for the Morphological Transitions of Surfactant Wormlike Micelles Triggered by Encapsulated Nonpolar Molecules

Langmuir ◽  
2021 ◽  
Vol 37 (10) ◽  
pp. 3093-3103
Author(s):  
Gervasio Zaldivar ◽  
Martin Conda-Sheridan ◽  
Mario Tagliazucchi
Keyword(s):  
Molecular Basis ◽  
Wormlike Micelles ◽  
Morphological Transitions ◽  
Nonpolar Molecules

Effect of aromatic acid on the rheological behaviors and microstructural mechanism of wormlike micelles in betaine surfactant

2021 ◽  
pp. 115908
Author(s):  
Silvia John Mushi ◽  
Wanli Kang ◽  
Hongbin Yang ◽  
Zhe Li ◽  
Kenzhebek Ibrashev ◽  
...  
Keyword(s):  
Aromatic Acid ◽  
Wormlike Micelles ◽  
Rheological Behaviors ◽  
Microstructural Mechanism

Synergistic effects in flows of mixtures of wormlike micelles and hydroxyethyl celluloses with or without hydrophobic modifications

2008 ◽  
Vol 322 (1) ◽  
pp. 65-72 ◽  
Author(s):  
M.R. Rojas ◽  
A.J. Müller ◽  
A.E. Sáez
Keyword(s):  
Synergistic Effects ◽  
Wormlike Micelles

Treatment of Malignant Brain Tumor by Tumor-Triggered Programmed Wormlike Micelles with Precise Targeting and Deep Penetration

2016 ◽  
Vol 26 (23) ◽  
pp. 4201-4212 ◽  
Author(s):  
Lijuan Zeng ◽  
Lili Zou ◽  
Haijun Yu ◽  
Xinyu He ◽  
Haiqiang Cao ◽  
...  
Keyword(s):  
Brain Tumor ◽  
Malignant Brain Tumor ◽  
Wormlike Micelles ◽  
Deep Penetration

scholarly journals Change in Characteristics of Wormlike Micelles of Hexaoxyethylene Tetradecyl and Decyl Ethers (C14E6 and C10E6) with Uptake of n-Dodecane

2008 ◽  
Vol 40 (5) ◽  
pp. 442-449 ◽  
Author(s):  
Marina Ochi ◽  
Sayaka Matsue ◽  
Yoshiyuki Einaga
Keyword(s):  
Wormlike Micelles

Cryogenic electron microscopy of rodlike or wormlike micelles in aqueous solutions of nonionic surfactant hexaethylene glycol monohexadecyl ether

Langmuir ◽  
1992 ◽  
Vol 8 (9) ◽  
pp. 2200-2205 ◽  
Author(s):  
Z. Lin ◽  
L. E. Scriven ◽  
H. T. Davis
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solutions ◽  
Nonionic Surfactant ◽  
Wormlike Micelles
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