TY - JOUR
T1 - Imidazolium-based poly(ionic liquid)/ionic liquid solutions
T2 - Rheology, structuration and ionic transport properties
AU - Zhang, Biao
AU - Sudre, Guillaume
AU - Quintard, Guilhem
AU - Serghei, Anatoli
AU - Bernard, Julien
AU - Fleury, Etienne
AU - Charlot, Aurélia
N1 - Publisher Copyright:
© 2021
PY - 2021/12/10
Y1 - 2021/12/10
N2 - RAFT-made poly(ionic liquid) chains (PIL), poly(1-[2-acryloylethyl]-3-methylimidazolium bromide) (Poly [AEmim][Br]), have been mixed with a ionic liquid (IL), namely butylmethylimidazolium chloride ([C4mim][Cl].) The similarities in terms of structure and polarity of these molecular and macromolecular imidazolium derivatives led to homogeneous and transparent solutions. The influence of the chain molar mass and the concentration was examined through rheology investigation. It was established that the steady-shear viscosity of the solutions, and the viscoelastic properties can be finely tuned by these two parameters and by temperature. The thermal-dependence of the rheological features allowed for determining high activation energies (Ea) (around 80 kJ/mol), compared to analogous PIL aqueous solutions. Such Ea values reflect high cohesion in PIL/IL solutions, related to the formation of multiple strong interactions, such as hydrogen bonds, van der Waals forces and Coulomb interactions between ionic species. Wide-angle and small-angle X-ray scattering experiments as well as scanning electron microscopy analysis evidenced a multi-scale local homogeneity of the PIL/IL solutions, which additionally exhibit high ionic conductivity (ca. 10−3 S/cm at 30 °C), as measured by broadband dielectric spectroscopy.
AB - RAFT-made poly(ionic liquid) chains (PIL), poly(1-[2-acryloylethyl]-3-methylimidazolium bromide) (Poly [AEmim][Br]), have been mixed with a ionic liquid (IL), namely butylmethylimidazolium chloride ([C4mim][Cl].) The similarities in terms of structure and polarity of these molecular and macromolecular imidazolium derivatives led to homogeneous and transparent solutions. The influence of the chain molar mass and the concentration was examined through rheology investigation. It was established that the steady-shear viscosity of the solutions, and the viscoelastic properties can be finely tuned by these two parameters and by temperature. The thermal-dependence of the rheological features allowed for determining high activation energies (Ea) (around 80 kJ/mol), compared to analogous PIL aqueous solutions. Such Ea values reflect high cohesion in PIL/IL solutions, related to the formation of multiple strong interactions, such as hydrogen bonds, van der Waals forces and Coulomb interactions between ionic species. Wide-angle and small-angle X-ray scattering experiments as well as scanning electron microscopy analysis evidenced a multi-scale local homogeneity of the PIL/IL solutions, which additionally exhibit high ionic conductivity (ca. 10−3 S/cm at 30 °C), as measured by broadband dielectric spectroscopy.
KW - Ionic liquid
KW - poly(ionic liquid)
KW - Rheology
UR - http://www.scopus.com/inward/record.url?scp=85118502867&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2021.124305
DO - 10.1016/j.polymer.2021.124305
M3 - 文章
AN - SCOPUS:85118502867
SN - 0032-3861
VL - 237
JO - Polymer
JF - Polymer
M1 - 124305
ER -