Electrorheological and dielectric behavior of new ionic liquid/silica systems

[Display omitted] •New ionic liquid based on 11-carboxyundecyltriphenylphosphonium bromide prepared.•New ionogels with ionic liquid confined in silica particles prepared.•Ionic liquid/silica ionogel suspensions with improved electrorheological behavior. New phosphonium-based ionic liquids, denoted,...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2013-09, Vol.405, p.64-70
Main Authors: Marins, Jessica A., Soares, Bluma G., Silva, Adriana A., Hurtado, Mayra G., Livi, Sebastien
Format: Article
Language:English
Subjects:
Chemical Sciences
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
condensation
Electrorheological fluids
Electrorheological suspensions
Exact sciences and technology
Fourier transform infrared spectroscopy
Fourier transforms
gelation
General and physical chemistry
hydrolysis
interleukin-2
iodides
Ionic liquids
Ionogels
Material chemistry
Networks
Permittivity
Polymers
silica
Silicon dioxide
Sol gel process
sol-gel processing
Thermogravimetric analysis
thermogravimetry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •New ionic liquid based on 11-carboxyundecyltriphenylphosphonium bromide prepared.•New ionogels with ionic liquid confined in silica particles prepared.•Ionic liquid/silica ionogel suspensions with improved electrorheological behavior. New phosphonium-based ionic liquids, denoted, 11-carboxyundecyltriphenylphosphonium bromide (IL1) and octadecyltriphenylphosphonium iodide (IL2), were employed on the sol–gel synthesis to prepare new silica-based matrices. The fastest gelation during the sol–gel process was observed in hydrolysis/condensation of tetraethoxysilane in the presence of IL1. The confinement of ionic liquids (especially IL1) inside the silica networks was suggested by thermogravimetric analysis and Fourier transform infrared spectroscopy. The resulting ionogels present higher permittivity than pure silica and were used as the solid component for the development of new electrorheological fluids, presenting good ER behavior, mainly those prepared with IL1.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2013.05.013