Covalent Hydrogels with Dual Temperature and Time Memory Function Based on Supramolecular Host–Guest Complexation

Autor: Lieselot De Smet, Khaled Belal, Aurelien Vebr, Joel Lyskawa, François Stoffelbach, Richard Hoogenboom, Patrice Woisel
Přispěvatelé: Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Sorbonne Université (SU), Institut Parisien de Chimie Moléculaire (IPCM), Chimie Moléculaire de Paris Centre (FR 2769), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Universiteit Gent = Ghent University (UGENT)
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: ACS Materials Letters
ACS Materials Letters, 2022, ACS Materials Letters, 5 (1), pp.235-242. ⟨10.1021/acsmaterialslett.2c00817⟩
ISSN: 2639-4979
DOI: 10.1021/acsmaterialslett.2c00817⟩
Popis: International audience; Temperature is among the most important measured physical parameters. Despite that numerous polymeric temperature sensors having been reported, none of these systems can record the time that the object was heated to a certain temperature. Here, we report a supramolecular approach for developing a smart polymeric hydrogel capable of measuring the temperature and the duration of the heat exposure. This double memory principle is based on dual kinetic control of the dissociation of cyclobis(paraquat-p-phenylene) tetrachloride (CBPQT4+,4Cl–)-naphthalene host–guest complexes within a thermoresponsive naphthalene functionalized poly(N-isopropylacrylamide) hydrogel. Heating-induced collapse of this LCST polymer hydrogel induces host–guest complex dissociation, followed by the diffusion-controlled release of the free CBPQT4+,4Cl– host into the medium surrounding the hydrogel. This partial host release is governed by the heat exposure time and the heating temperature that controls the extent of dehydration of the hydrogel and, thus, the diffusion rate of the CBPQT4+,4Cl–. Hence, the amount of host released is an indicator for both the heating temperature and the heating time of the hydrogel and can be recorded by determining the reswelling capability of the hydrogel in water. As such, measuring the reswelling capability provides information on how long the hydrogel system was exposed to a certain temperature.
Databáze: OpenAIRE
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