Abstract
Bentonite is a natural clay mineral with high cationic exchange properties and plays an important role in organic-inorganic composite hydrogels. We report an organic-inorganic cross-linked self-healing hydrogel with excellent mechanical properties by introducing acrylic acid-modified bentonite (AABT) into its cross-link network. AABT with unsaturated double bonds was co-polymerized with AA to construct the hybrid cross-link network of the hydrogel. Then, the carboxyl groups in the PAA chain reacted with CS to form a physically cross-linked network with a hydrogen bond structure. As confirmed by FTIR, XRD, XPS and SEM, the AABT participated in the formation of the hydrogel network, and the hydrogen bonds between PAA and CS chains were formed. Our AABT-PAA/CS hydrogels possessed tensile strength, compressive modulus and elongation at break as high as 0.96 MPa, 4.5 MPa and 1331%, respectively. Besides, our hydrogels also exhibited excellent self-healing properties, with recovered rate stress and strain of ~76.6% and ~77.7% after 4 h, respectively.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.