Rheological behavior and mechanism of pH-responsive wormlike micelle variations induced by isomers of phthalic acid

Soft Matter ◽  
2018 ◽  
Vol 14 (22) ◽  
pp. 4445-4452 ◽  
Author(s):  
Wanli Kang ◽  
Yilu Zhao ◽  
Pengxiang Wang ◽  
Zhe Li ◽  
Xiaoyu Hou ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Rheological Behavior ◽  
Phthalic Acid ◽  
Wormlike Micelles ◽  
Ph Responsive ◽  
Wormlike Micelle

Responsive wormlike micelles (WLMs) constructed by different carboxylic acids are fascinating.

Study on the effect of the organic acid structure on the rheological behavior and aggregate transformation of a pH-responsive wormlike micelle system

Soft Matter ◽  
2019 ◽  
Vol 15 (15) ◽  
pp. 3160-3167 ◽  
Author(s):  
Wanli Kang ◽  
Xiaoyu Hou ◽  
Pengxiang Wang ◽  
Yilu Zhao ◽  
Tongyu Zhu ◽  
...  
Keyword(s):  
Organic Acid ◽  
Rheological Behavior ◽  
Rheological Behaviour ◽  
Ph Responsive ◽  
Wormlike Micelle ◽  
System P ◽  
Acid Structure ◽  
Micelle System

The effect of the organic acid structure on the rheological behaviour and aggregate transformation of a pH-responsive wormlike micelle system has been researched.

scholarly journals pH-Responsive Rheological Properties and Microstructure Transition in Mixture of Anionic Gemini/Cationic Monomeric Surfactants

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 5013
Author(s):  
Maozhang Tian ◽  
Xi Chen ◽  
Xinyuan Zou ◽  
Yuchen Qian ◽  
Zhang Liu ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Gemini Surfactant ◽  
Total Concentration ◽  
Mixed System ◽  
Wormlike Micelles ◽  
Spontaneous Curvature ◽  
Ph Responsive ◽  
Zero Shear Viscosity ◽  
Wormlike Micelle ◽  
Viscosity Enhancement

Surfactant aggregates have long been considered as a tool to improve drug delivery and have been widely used in medical products. The pH-responsive aggregation behavior in anionic gemini surfactant 1,3-bis(N-dodecyl-N-propanesulfonate sodium)-propane (C12C3C12(SO3)2) and its mixture with a cationic monomeric surfactant cetyltrimethylammonium bromide (CTAB) have been investigated. The spherical-to-wormlike micelle transition was successfully realized in C12C3C12(SO3)2 through decreasing the pH, while the rheological properties were perfectly enhanced for the formation of wormlike micelles. Especially at 140 mM and pH 6.7, the mixture showed high viscoelasticity, and the maximum of the zero-shear viscosity reached 1530 Pa·s. Acting as a sulfobetaine zwitterionic gemini surfactant, the electrostatic attraction, the hydrogen bond and the short spacer of C12C3C12(SO3)2 molecules were all responsible for the significant micellar growth. Upon adding CTAB, the similar transition could also be realized at a low pH, and the further transformation to branched micelles occurred by adjusting the total concentration. Although the mixtures did not approach the viscosity maximum appearing in the C12C3C12(SO3)2 solution, CTAB addition is more favorable for viscosity enhancement in the wormlike-micelle region. The weakened charges of the headgroups in a catanionic mixed system minimizes the micellar spontaneous curvature and enhances the intermolecular hydrogen-bonding interaction between C12C3C12(SO3)2, facilitating the formation of a viscous solution, which would greatly induce entanglement and even the fusion of wormlike micelles, thus resulting in branched microstructures and a decline of viscosity.

ADSORPTION LIQUID CHROMATOGRAPHY OF ETHANOL ELUATE OF ETHANOL EXTRACT OF GREEN WALNUTS+LEAVES (LUGLANS REGIA L., NUT FAMILY - LUGLANDACEAC) (Message VI)

2021 ◽  
Vol 7 (2) ◽  
pp. 17-22
Author(s):  
V. Platonov ◽  
Aleksandr Hadarcev ◽  
G. Suhih ◽  
M. Volochaeva ◽  
I. Dunaeva
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Chemical Composition ◽  
Carboxylic Acids ◽  
Phthalic Acid ◽  
Ethanol Extract ◽  
X Ray ◽  
Chromatography Mass Spectrometry ◽  
Column Adsorption ◽  
Structural Formulas

The aim of the study was to perform column adsorption liquid chromatography in order to obtain ethanol eluate, after preliminary sequential elution of ethanol extract with solvents in the order of their polarity: n–hexane, toluene, chloroform, acetone; to study in detail the chemical composition of this eluate by chromatography-mass spectrometry and X-ray fluorescence spectroscopy, with the intensification of compounds determining the composition of eluate, obtaining their masses -spectra, structural formulas, determination of the nature of trace elements. Materials and methods of research. A detailed study of the chemical composition of acetone eluate of ethanol extract of walnuts+ leaves was carried out using column adsorption liquid chromatography, chromato-mass spectrometry and X-ray fluorescence analysis. The results and their discussion. The features of the chemical composition of ethanol eluate of the product of column adsorption liquid chromatography of ethanol extract were studied, the qualitative composition and quantitative content of compounds identified in the first one were established by chromatography-mass spectrometry. Mass spectra and structural formulas were obtained for 31 individual eluate compounds. Ethanol eluate is characterized by the following indicators of structural and group composition (mass. % of eluate): esters of phthalic acid - 52.14, silicon and sulfur-containing compounds, respectively - 20.19 and 6.43, hydrocarbons - 15.38, glycosides - 2.21, alcohols - 1.92, carboxylic acids - 1.07, sterols - 0.89. It is assumed that the pharmacological effect of ethanol eluate is mainly determined by a set of free carboxylic acids, as well as phthalic acid, formed as a result of biochemical and hydrological transesterification of its esters containing compounds, alcohols, glycosides and sterols. Organosilicon compounds during hydrolysis give silica in the size of nanoparticles, which play the role of carriers of the above compounds to various organs of a living organism, as well as drainage of blood vessels from the products of cell metabolism, for example, cholesterol, various fats, etc. A comparative characteristic of the chemical composition of all ethanol extract eluates was carried out, the effectiveness of column adsorption liquid chromatography was shown.

pH-Responsive Wormlike Micelles Formed by an Anionic Surfactant Derived from Rosin

2020 ◽  
Vol 68 (37) ◽  
pp. 10063-10070
Author(s):  
Zhaolan Zhai ◽  
Shengfeng Ye ◽  
Xinyan Yan ◽  
Zhanqian Song ◽  
Shibin Shang ◽  
...  
Keyword(s):  
Anionic Surfactant ◽  
Wormlike Micelles ◽  
Ph Responsive

Synergistic effect of pH-responsive wormlike micelles based on a simple amphiphile

Soft Matter ◽  
2016 ◽  
Vol 12 (20) ◽  
pp. 4549-4556 ◽  
Author(s):  
Xuepeng Wu ◽  
Yining Wu ◽  
Shuai Yang ◽  
Mingwei Zhao ◽  
Mingwei Gao ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Wormlike Micelles ◽  
Ph Responsive ◽  
Effect Of Ph

pH-Responsive Wormlike Micelles

2015 ◽  
pp. 41-48
Author(s):  
Yujun Feng ◽  
Zonglin Chu ◽  
Cécile A. Dreiss
Keyword(s):  
Wormlike Micelles ◽  
Ph Responsive

Cryogenic wormlike micelles

Soft Matter ◽  
2019 ◽  
Vol 15 (12) ◽  
pp. 2511-2516 ◽  
Author(s):  
Hongyao Yin ◽  
Yujun Feng ◽  
Peixun Li ◽  
James Doutch ◽  
Yixiu Han ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Rheological Behavior ◽  
Self Assembly ◽  
Mixed Solvent ◽  
Freezing Point ◽  
The Self ◽  
Wormlike Micelles ◽  
Micellar Solutions ◽  
Zwitterionic Surfactant

Cryogenic wormlike micellar solutions with a freezing point far below 0 °C and unique rheological behavior are fabricated from the self-assembly of a C22-tailed zwitterionic surfactant in a mixed solvent of ethylene glycol and water. Such fluids could find applications in areas where viscoelasticity is highly desired at subfreezing temperatures.

Wormlike micelles with a unique ladder shape formed by a C22-tailed zwitterionic surfactant bearing a bulky piperazine group

Soft Matter ◽  
2019 ◽  
Vol 15 (38) ◽  
pp. 7644-7653 ◽  
Author(s):  
Yugui Han ◽  
Yefei Wang ◽  
Xianghai Meng ◽  
Qiuxia Wang ◽  
Xiaodong Han
Keyword(s):  
Shear Rate ◽  
Rheological Behavior ◽  
Wormlike Micelles ◽  
Zwitterionic Surfactant ◽  
Shape Structure

The unique ladder shape structure of the assembled EDPS WLMs would change with the increase of the shear rate, which was responsible for the abnormal rheological behavior.

Rheological behavior and Ibuprofen delivery applications of pH responsive composite alginate hydrogels

2016 ◽  
Vol 139 ◽  
pp. 211-218 ◽  
Author(s):  
Suraya Jabeen ◽  
Masrat Maswal ◽  
Oyais Ahmad Chat ◽  
Ghulam Mohammad Rather ◽  
Aijaz Ahmad Dar
Keyword(s):  
Rheological Behavior ◽  
Ph Responsive ◽  
Alginate Hydrogels
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