Structural insights into the effect of cholinium-based ionic liquids on the critical micellization temperature of aqueous triblock copolymers
authors Khan, I; Umapathi, R; Neves, MC; Coutinho, JAP; Venkatesu, P
nationality International
journal PHYSICAL CHEMISTRY CHEMICAL PHYSICS
keywords AMPHIPHILIC BLOCK-COPOLYMERS; PPG-PEG-PPG; BIPHASIC SYSTEMS; AGGREGATION BEHAVIOR; TETRAETHYLENE GLYCOL; POLYETHYLENE-GLYCOL; FTIR SPECTROSCOPY; PHASE-SEPARATION; MICELLAR SYSTEMS; WATER
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 (Z), 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.
publisher ROYAL SOC CHEMISTRY
issn 1463-9076
year published 2016
volume 18
issue 12
beginning page 8342
ending page 8351
digital object identifier (doi) 10.1039/c5cp07079a
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Physics
unique article identifier WOS:000372249100004
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 3.906
5 year journal impact factor 4.224
category normalized journal impact factor percentile 73.037
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg