Ultra-Tough and Recyclable Ionogels Constructed by Coordinated Supramolecular Solvents.
Angew Chem Int Ed Engl
; 61(50): e202212512, 2022 Dec 12.
Article
em En
| MEDLINE
| ID: mdl-36264066
ABSTRACT
The mechanical properties of most hydrogels (ionogels) are considerably affected by covalently cross-linked networks. However, the interactions between solvent/solvent molecules and solvent/polymer chains are usually ignored. Herein, a series of ultra-tough ionogels were prepared via a supramolecular solvent, halometallate ionic liquid, in which cations and coordinating anions form a 3D supramolecular network. The linear polymer chains are physically cross-linked with supramolecular solvents synergistically enhancing the strength (14.3â
MPa), toughness (78â
MJ m-3 ), and Young's modulus (55â
MPa) of ionogels, effectively dispersing the stress concentration under load, and obtaining better fatigue resistance and higher fracture energy (198â
kJ m-2 ). Furthermore, the reversible cross-linking enables green recovery and recycling of ionogels, simply by water. This strategy shows broad applicability based on a variety of supramolecular solvents and coordinatable polymers.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2022
Tipo de documento:
Article