NDLI: Phase behaviour and temperature-responsive properties of a gemini surfactant/Brij-30/water system

Content Provider	Royal Society of Chemistry (RSC)
Author	Guo, Yan Wei, Xilian Zhang, Qirui Yao, Meihuan Han, Chuanhong Zhang, Yingtian Chen, Xiaoxiao
Copyright Year	2017
Abstract	The phase behaviour of a ternary system composed of cationic gemini surfactant 2-hydroxypropyl-1,3-bis(myristyldimethylammonium chloride) (14-3(OH)-14(2Cl)), nonionic surfactant polyoxyethylene laurel ether (C12H25(OCH2CH2)10OH, Brij-30) and H2O was studied and its phase diagram was determined. In several different phase regions identified in the phase diagram, the viscoelastic worm-like micellar solution region was investigated. The focus of the investigation was the increase in the viscosity of the micellar solution with the temperature and the Brij-30 content, as suggested by a partial region of the triangular phase diagram. With an increase in the Brij-30 content or temperature, one-dimensional micellar growth occurred, and a maximum appeared in the zero-shear viscosity, η0, versus Brij-30 content or temperature curves; this was true for mixed solutions containing 14-3(OH)-14(2Cl) and Brij-30 in different mass ratios (WBrij-30/W14-3(OH)-14(2Cl)). After the maximum point, the decrease in viscosity is the result of the micellar shortening in the size with Brij-30 content and of the micellar branching in the network structure with temperature. This rheological analysis was performed to investigate the structural changes in different solutions as well as the effects of various factors on micellar growth. Various techniques were used to study the phase-transition processes occurring in this system, including cryogenic transmission electron microscopy, small-angle X-ray scattering measurements, and differential scanning calorimetry. The transition mechanisms of the aggregates were analysed on the basis of the obtained results.
Starting Page	1171
Ending Page	1181
Page Count	11
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	13
Issue Number	6
Journal	Soft Matter
DOI	10.1039/c6sm02654k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Water Viscoelasticity Viscosity Differential scanning calorimetry Ether Phase diagram Rheology Cryogenic transmission electron microscopy Gemini Observatory Micelle Surfactant Small-angle X-ray scattering Chloride Polyethylene glycol
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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