Jump to main content
Jump to site search


Facile fabrication of thermo/redox responsive hydrogels based on a dual crosslinked matrix for a smart on–off switch

Author affiliations

Abstract

Stimuli-responsive or “smart” soft materials have raised considerable attention due to their ability to spontaneously respond to external environmental variations and have a great potential for wide applications. Herein, a thermo/redox responsive hydrogel is facilely constructed based on a dual crosslinked matrix: the primary chemical crosslinked copolymer is composed of thermo-responsive poly(N-isopropylacrylamide) (PNIPAM) and poly(ionic liquid), and the secondary physical crosslinking component is generated by the ionic coordination between iron ions and carboxyl groups in the poly(ionic liquid). The non-covalent ion coordination crosslinking is introduced into a covalently crosslinked network, which further strengthens the soft PNIPAM matrix and enhances the mechanical performances of the hydrogels. The excellent thermosensitivity of PNIPAM and the good conductive property of poly(ionic liquid) provide the hydrogel with an attractive performance as a thermo-responsive switch. Moreover, the trapped iron ions in the network endow the hydrogels with redox-responsiveness, which could be reversibly chemically oxidized and reduced. The mechanical strength of hydrogels could also be tuned by the crosslinked capacity of iron ions within the gel matrix between the strong binding of the oxidized state (Fe3+) and poor coordination of the reduced state (Fe2+). These stimuli-responsive hydrogels have the potential to be used as smart materials for stimuli-responsive devices.

Graphical abstract: Facile fabrication of thermo/redox responsive hydrogels based on a dual crosslinked matrix for a smart on–off switch

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Mar 2018, accepted on 28 Apr 2018 and first published on 01 May 2018


Article type: Paper
DOI: 10.1039/C8SM00504D
Citation: Soft Matter, 2018, Advance Article
  •   Request permissions

    Facile fabrication of thermo/redox responsive hydrogels based on a dual crosslinked matrix for a smart on–off switch

    N. Sun, P. Sun, A. Wu, X. Qiao, F. Lu and L. Zheng, Soft Matter, 2018, Advance Article , DOI: 10.1039/C8SM00504D

Search articles by author

Spotlight

Advertisements