Self-assembly and phase behaviour of PEI : cationic surfactant aqueous mixtures forming mesostructured films at the air/solution interface

Soft Matter ◽  
2013 ◽  
Vol 9 (15) ◽  
pp. 4003 ◽  
Author(s):  
Hansel Comas-Rojas ◽  
Carlos Enríquez-Victorero ◽  
Stephen J. Roser ◽  
Karen J. Edler ◽  
Aurora Pérez-Gramatges
Keyword(s):  
Cationic Surfactant ◽  
Self Assembly ◽  
Phase Behaviour ◽  
Aqueous Mixtures ◽  
Solution Interface

scholarly journals Self-assembly of sodium dodecylsulfate and dodecyltrimethylammonium bromide mixed surfactants with dyes in aqueous mixtures

2019 ◽  
Vol 6 (3) ◽  
pp. 181979 ◽  
Author(s):  
K. M. Sachin ◽  
Sameer A. Karpe ◽  
Man Singh ◽  
Ajaya Bhattarai
Keyword(s):  
Surface Tension ◽  
Self Assembly ◽  
Sodium Dodecylsulfate ◽  
Critical Micellar Concentration ◽  
Aqueous System ◽  
Mixed Surfactants ◽  
Dodecyltrimethylammonium Bromide ◽  
Aqueous Mixtures ◽  
Krafft Temperature ◽  
Vis Spectroscopy

The micellar property of mixed surfactant systems, cationic (dodecyltrimethylammonium bromide, DTAB) and anionic (sodium dodecylsulfate, SDS) surfactants with variable molar ratios in aqueous system has been reported by using surface tension and conductivity measurements at T = 293.15, 298.15 and 303.15 K. DTAB concentrations are varied from 1.0 × 10 −4 to 3 × 10 −4 mol l −1 in 1.0 × 10 −2 mol l −1 SDS solution while the SDS concentration is varied from 1.0 × 10 −3 to 1.5 × 10 −2 mol l −1 in approximately 5.0 × 10 −3 mol l −1 DTAB, so that such concentrations of DTAB-SDS (DTAB-rich) and SDS-DTAB (SDS-rich) solutions were chosen 3 : 1 ratio. The critical micellar concentration, as well as surface and thermodynamic properties for DTAB-rich and SDS-rich solutions, were evaluated by the surface tension ( γ ) and conductivity ( κ ) methods. The pseudo phase separation model was coupled with the dissociated Margules model for synergism. The Krafft temperature behaviour and optical analysis of mixed surfactants are studied using conductivity and UV–Vis spectroscopy, respectively. The dispersibility and stability of DTAB-rich and SDS-rich solutions with and without dyes (2.5 × 10 −5 mol l −1 of methyl orange and methylene blue) are carried out by using UV–Vis spectroscopy and dynamic light scattering.

scholarly journals Synthesis, supramolecular organization and thermotropic phase behaviour of N-acyltris(hydroxymethyl)aminomethane

RSC Advances ◽  
2018 ◽  
Vol 8 (57) ◽  
pp. 32823-32831 ◽  
Author(s):  
Sengan Megarajan ◽  
Siva Bala Subramaniyan ◽  
Sureshan Muthuswamy ◽  
Savarimuthu Philip Anthony ◽  
Jothi Arunachalam ◽  
...  
Keyword(s):  
Self Assembly ◽  
Phase Behaviour ◽  
Supramolecular Organization

Self assembly of N-acyltris(hydroxymethyl)aminomethane into interdigitized vesicles.

Self-assembly, phase behaviour and ion-conducting property of pyridinium-based ionic liquid-crystalline oligomers

2020 ◽  
pp. 1-14 ◽  
Author(s):  
Shuiyang Liu ◽  
Guiyang Yan ◽  
Jiwei Wang ◽  
Jingda Zhou ◽  
Lele Bie ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
Phase Behaviour ◽  
Conducting Property ◽  
Ion Conducting

Lyotropic Phase Behaviour and Structural Parameters of Monosaccharide and Disaccharide Guerbet Branched-Chain β-D-Glycosides

2014 ◽  
Vol 895 ◽  
pp. 111-115 ◽  
Author(s):  
Hairul A.A. Hamid ◽  
Rauzah Hashim ◽  
John M. Seddon ◽  
Nicholas J. Brooks
Keyword(s):  
Self Assembly ◽  
Room Temperature ◽  
Structural Parameters ◽  
Phase Behaviour ◽  
Hydroxyl Groups ◽  
X Ray Diffraction ◽  
X Ray ◽  
Branched Chain ◽  
Optical Polarizing Microscopy ◽  
Water Contents

The phase behaviour and self-assembly structural parameters of a pair of monosaccharide and disaccharide Guerbet branched-chain β-D-glycosides, namely 2-octyldodecyl β-D-glucoside (β-Glc-C12C8) and 2-octyldodecyl β-D-maltoside (β-Mal-C12C8), have been studied by means of optical polarizing microscopy (OPM) and small-angle X-ray diffraction at room temperature (25°C). These compounds are sugar-based glycolipid surfactants having a total chain length of C20, and differ based on the increasing number of hydroxyl groups of the sugar headgroup (glucose and maltose). The repeat spacings obtained by X-ray diffraction as a function of water content have been used to determine the limiting hydration for the two glycosides. At room temperature, β-Glc-C12C8 and β-Mal-C12C8 have limiting hydrations of 22 wt% and 25 wt%, corresponding to 8 10 and 10 12 water molecules per glycoside, respectively. At all water contents between 5 and 29 wt % water, these compounds adopt inverse hexagonal (HII) or fluid lamellar (Lα) phases. The structural parameters of these phases have been determined from the diffraction data, from the X-ray repeat spacings, densities and concentration of the glycosides.

Self-assembly of highly asymmetric, poly(ionic liquid)-rich diblock copolymers and the effects of simple structural modification on phase behaviour

2019 ◽  
Vol 10 (6) ◽  
pp. 751-765 ◽  
Author(s):  
Alyssa W. May ◽  
Zhangxing Shi ◽  
Dilanji B. Wijayasekara ◽  
Douglas L. Gin ◽  
Travis S. Bailey
Keyword(s):  
Ionic Liquid ◽  
Phase Behavior ◽  
Self Assembly ◽  
Structural Modification ◽  
Diblock Copolymers ◽  
Alkyl Substituent ◽  
Phase Behaviour ◽  
Phase Boundaries ◽  
Poly Ionic Liquid

A series of ATRP-synthesized poly(IL) diblock copolymers exhibit morphological phase behavior with shifted phase boundaries and alkyl substituent dependent segregation.

β-Cyclodextrin induced hierarchical self-assembly of a cationic surfactant bearing an adamantane end group in aqueous solution

Soft Matter ◽  
2016 ◽  
Vol 12 (48) ◽  
pp. 9641-9648 ◽  
Author(s):  
Jiao Wang ◽  
Meihuan Yao ◽  
Qintang Li ◽  
Sijing Yi ◽  
Xiao Chen
Keyword(s):  
Aqueous Solution ◽  
Cationic Surfactant ◽  
Self Assembly ◽  
End Group

THE ELECTROCHEMICAL STUDIES ON A SELF-ASSEMBLED VIOLOGEN MONOLAYER USING QUARTZ CRYSTAL MICROBALANCE

2002 ◽  
Vol 01 (05n06) ◽  
pp. 593-596 ◽  
Author(s):  
J. Y. OCK ◽  
H. K. SHIN ◽  
Y. S. KWON ◽  
S. H. SONG ◽  
S. M. CHANG ◽  
...  
Keyword(s):  
Self Assembly ◽  
Quartz Crystal ◽  
Surface Coverage ◽  
Gold Surface ◽  
Frequency Change ◽  
Self Assembled Monolayer ◽  
Solution Interface ◽  
Reversible Redox ◽  
Mass Detector ◽  
Self Assembled

The electrochemical behavior of viologen self-assembled monolayer has been investigated with QCM, which has been known as ng order mass detector. The self-assembly process of viologen was monitored using resonant frequency (ΔF) and resonant resistance (R). The QCM measurements indicated a mass adsorption for viologen assembling on the gold surface with a frequency change of about 300, 135 Hz and its surface coverage (Γ) was calculated to be 5.02 × 10-9 and 1.64 × 10-9 mol/cm2. A reversible redox process was also observed and analyzed with an ionic interaction at the viologen/solution interface using ΔF.

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