Next Article in Journal
miR-218 Inhibits Erythroid Differentiation and Alters Iron Metabolism by Targeting ALAS2 in K562 Cells
Next Article in Special Issue
Micellization Behavior of Long-Chain Substituted Alkylguanidinium Surfactants
Previous Article in Journal
Chronic Hepatitis B with Spontaneous Severe Acute Exacerbation
Previous Article in Special Issue
Ionic Liquids 2014 and Selected Papers from ILMAT 2013: Highlighting the Ever-Growing Potential of Ionic Liquids
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle
Int. J. Mol. Sci. 2015, 16(12), 28146-28155; doi:10.3390/ijms161226096

The Formation of pH-Sensitive Wormlike Micelles in Ionic Liquids Driven by the Binding Ability of Anthranilic Acid

1
School of Energy Resources, China University of Geosciences, Beijing 100083, China
2
Sinopec Shengli Oilfield Research Institute of Petroleum Engineering, Dongying 257000, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Andreas Taubert and Peter Hesemann
Received: 19 September 2015 / Revised: 16 November 2015 / Accepted: 20 November 2015 / Published: 26 November 2015
(This article belongs to the Special Issue Ionic Liquids 2016 and Selected Papers from ILMAT III)
View Full-Text   |   Download PDF [9030 KB, uploaded 26 November 2015]   |  

Abstract

Wormlike micelles are typically formed by mixing cationic and anionic surfactants because of attractive interactions in oppositely charged head-groups. The structural transitions of wormlike micelles triggered by pH in ionic liquids composed of N-alkyl-N-methylpyrrolidinium bromide-based ILs (ionic liquids) and anthranilic acid were investigated. These structures were found responsible for the variations in flow properties identified by rheology and dynamic light scattering, and account for the structures observed with cryogenic transmission electron microscopy (Cryo-TEM). High-viscosity, shear-thinning behavior, and Maxwell-type dynamic rheology shown by the system at certain pH values suggested that spherical micelles grow into entangled wormlike micelles. Light scattering profiles also supported the notion of pH-sensitive microstructural transitions in the solution. Cryo-TEM images confirmed the presence of spherical micelles in the low-viscosity sample and entangled wormlike micelles in the peak viscosity sample. Nuclear magnetic resonance spectroscopy analysis revealed that the pH sensitivity of ionic liquid systems originated from the pH-dependent binding ability of anthranilic acid to the cationic headgroup of ionic liquids. View Full-Text
Keywords: pH-sensitive; wormlike micelles; rheology; morphological variation; formation mechanism pH-sensitive; wormlike micelles; rheology; morphological variation; formation mechanism
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

You, Q.; Zhang, Y.; Wang, H.; Fan, H.; Guo, J.; Li, M. The Formation of pH-Sensitive Wormlike Micelles in Ionic Liquids Driven by the Binding Ability of Anthranilic Acid. Int. J. Mol. Sci. 2015, 16, 28146-28155.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top