What will happen when thermoresponsive poly(N-isopropylacrylamide) is tethered on poly(ionic liquid)s?

Abstract

A thermoresponsive ionic liquid diblock copolymer shows abnormal thermoresponse, and its aqueous solution remains transparent at the phase transition temperature.

Thermoresponsive polycations

“…Luo et al studied a series of block copolymers P43a–f comprised of PNIPAM and styrene-based poly(vinylbenzyl)methylimidazolium (PVBMIm) with BF 4 − counterions. 127 As shown in Fig. 15B, copolymers with long cationic blocks are soluble at all temperatures.…”

Influence of the anionic structure and central atom of a cation on the properties of LCST-type draw solutes for forward osmosis

“…66–68 All the intensity of each peak decreases upon increasing the temperature, which seems to suggest that their protons are wrapped due to aggregation after phase transition. 69,70…”

Molecular bases for temperature sensitivity in supramolecular assemblies and their applications as thermoresponsive soft materials

“…The LCST-type behavior also vanished, as increase in P[VBMI][BF4] molar fraction resulted in less percent transmittance change. 93 Furthermore, in another example, introducing hydrophilic OEGMA300 and hydrophobic butyl methacrylate (BuMA) monomers to thermoresponsive poly(diethylene glycol methacrylate) (PDEGMA) to alter their cloud point temperature. It was shown that the cloud point increased when the content of OEGMA300 increased due to the hydrophilic effect, and the cloud point decreased as the amount of BuMA in the polymer increased due to its hydrophobicity.…”