Structural insights into the effect of cholinium-based ionic liquids on the critical micellization temperature of aqueous triblock copolymers

Imran Khan, Reddicherla Umapathi, Márcia C. Neves, João A P Coutinho, Pannuru Venkatesu

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Symmetrical poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEG-PPG-PEG) triblock copolymer with 82.5% PEG as the hydrophilic end blocks, and PPG as the hydrophobic middle block, was chosen to study the effect of ionic liquids (ILs) on the critical micellization temperature (CMT) of block copolymers in aqueous solution. In the present work, cholinium-based ILs were chosen to explore the effect of the anions on the copolymer CMT using fluorescence spectroscopy, dynamic light scattering (DLS), viscosity (η), FT-IR spectroscopy, nuclear magnetic resonance (NMR), and direct visualization of the various self-assembled nanostructures by scanning electron microscopy (SEM). The result suggests that ILs have the ability to decrease the CMT of the aqueous copolymer solution which is dependent on the nature of the anions of the ILs. The present study reveals that the hydrophobic part PPG of the copolymer has more influence on this behavior than the PEG hydrophilic part.

Original languageEnglish
Pages (from-to)8342-8351
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume18
Issue number12
DOIs
Publication statusPublished - Mar 28 2016

Fingerprint

Ionic Liquids
Micellization
Polyethylene glycols
Block copolymers
copolymers
critical temperature
glycols
Copolymers
liquids
Anions
ethylene
anions
Temperature
Propylene Glycol
Fluorescence spectroscopy
Dynamic light scattering
block copolymers
polypropylene
spectroscopy
Infrared spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

Cite this

Structural insights into the effect of cholinium-based ionic liquids on the critical micellization temperature of aqueous triblock copolymers. / Khan, Imran; Umapathi, Reddicherla; Neves, Márcia C.; Coutinho, João A P; Venkatesu, Pannuru.

In: Physical Chemistry Chemical Physics, Vol. 18, No. 12, 28.03.2016, p. 8342-8351.

Research output: Contribution to journalArticle

Khan, Imran ; Umapathi, Reddicherla ; Neves, Márcia C. ; Coutinho, João A P ; Venkatesu, Pannuru. / Structural insights into the effect of cholinium-based ionic liquids on the critical micellization temperature of aqueous triblock copolymers. In: Physical Chemistry Chemical Physics. 2016 ; Vol. 18, No. 12. pp. 8342-8351.
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