Abstract
Although bilayer hydrogel (BLGEL) has received increasing interest owing to their promising applications in artificial muscles, soft robotics, and flexible electronics, it is still a challenging task to realize controllable deformation-recovery and shape memory in one hydrogel. Herein, a novel type of freeze-thaw bilayer hydrogel (F-BLGEL) was successfully fabricated, including a top layer of the semi-interpenetrating network of polyacrylamide-chitosan (PAM-CS) and a bottom layer of the copolymerization network of P (N-isopropylacrylamide-2-acrylamido-2-methylpropanesulfonic acid) (P(NIPAm-AMPS)). Not limited with the unidirectional temporary deformation occurs in 30 s, the hydrogel is also achieved permanent deformation in the opposite direction, and the deformation recovery process can be accurately controlled by calculating the deformation recovery rate, so that the F-BLGEL hydrogel exhibits the outstanding controllable deformation-recovery performance. The shape fixation ratio Rf and shape recovery ratio Rr reached 200% and 100%, respectively, the hydrogel has excellent fatigue resistance in the five-cycle test, which reflects excellent shape memory ability. Overall, based on the intelligent responsive, the F-BLGEL hydrogel was designed as a temperature-controlled device, which can be treated as a candidate material for intelligent controlled device.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
