How Does a Smart Polymer Respond to Imidazolium-Based Ionic Liquids?
| Autor: | Reddicherla Umapathi, Payal Narang, Awanish Kumar, Pannuru Venkatesu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Hofmeister series Renewable Energy Sustainability and the Environment Chemistry General Chemical Engineering Inorganic chemistry 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Smart polymer Fluorescence Lower critical solution temperature 0104 chemical sciences chemistry.chemical_compound Ionic liquid Environmental Chemistry Research article Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 6:1400-1410 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.7b03790 |
| Popis: | In this research article, we have explored the changes in the lower critical solution temperature (LCST) of the poly(N-vinylcaprolactam) (PVCL) in the presence of imidazolium-based ionic liquids (ILs) with fixed cation 1-butyl-3-methylimidazolium cation [Bmim+], and commonly used anions such as SCN–, I–, Br–, Cl–, CH3COO–, and HSO4–. The series of anions also reflect the Hofmeister series of ILs. The results reveal that the LCST of the PVCL increases with increasing IL concentration. Interestingly, the results are the reverse of the PNIPAM with the same ILs where the LCST of PNIPAM decreases linearly with increase in the IL concentration following the Hofmeister series. Herein, we observed that the increase in the LCST of PVCL follows the order of ILs as, HSO4– < CH3COO– < Cl– < Br– < I– < SCN–. This is the reverse order for Hofmeister series anions effect on the polymer. Furthermore, the different kind of interactions occur between ILs and PVCL observed using UV-absorbance, fluorescence, and FTIR spectro... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|