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Mechanical strong stretchable conductive multi-stimuli-responsive nanocomposite double network hydrogel as biosensor and actuator.
- Source :
-
Journal of Biomaterials Science -- Polymer Edition . Sep2020, Vol. 31 Issue 14, p1770-1792. 23p. - Publication Year :
- 2020
-
Abstract
- Multi-stimuli- responsive mechanical strong stretchable hydrogel has grabbed extensive attention in recent years. Here, a novel stretchable conductive biocompatible near-infrared light(NIR)-/thermal-/pH-/ionic concentration- responsive carboxymethyl chitosan (CMCTs)/graphene oxide (GO)/poly(N-isopropylacrylamide)(PNIPAm) nanocomposite double network hydrogel was fabricated through a simple one-pot in situ free radical polymerization, which is initiated by ultraviolet (UV) light and using N-(3-dimethylaminopropyl)-N-ethylcarbodiimidehydrochloride (EDC) and N,N'-bis(acryloyl)cystamine (BAC) as cross-linkers respectively, instead of toxic organic molecules. When the concentration of CMCTs, GO, EDC and BAC is 22.50, 0.103, 7.50 and 0.467 mg/mL respectively, the obtained hydrogel sample owns the highest tensile strength of 1046 kPa at failure strain of 1286% and a corresponding compressive stress of 2.37 MPa at deformation of 90%. Besides, these hydrogels have an obvious pH-/thermal-/ionic concentration-responsive properties depending on the concentration of the above mentioned factors, and their good conductive property makes them as candidate material for healthcare biosensors. Finally, we attempt to design a novel thermal-/NIR-responsive double network structure bilayer hydrogel, which has the potential use as remote actuator in dangerous places in the future. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDROGELS
*ACTUATORS
*FREE radicals
*TENSILE strength
*CHITOSAN
*IONIC conductivity
Subjects
Details
- Language :
- English
- ISSN :
- 09205063
- Volume :
- 31
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Journal of Biomaterials Science -- Polymer Edition
- Publication Type :
- Academic Journal
- Accession number :
- 145951355
- Full Text :
- https://doi.org/10.1080/09205063.2020.1775760