Nacre-like Graphene Oxide/Cross-Linking Agent/Polyvinyl alcohol Nanocomposites with Excellent Mechanical Properties Realized by Dual Interconnected Network
발표자
()
초록
내용
Inspired by the layered structure of nacres, graphene oxide (GO)/cross-linking agent (CA)/polyvinyl alcohol (PVA) nanocomposites with high toughness and strength are successfully fabricated through a vacuum filtration method. The GO nanosheets with carboxyl and hydroxyl groups, CA with aryl groups, and the PVA molecule chains with abundant hydroxyl groups could easily form dual cross-linked hydrogen bonding networks, resulting in a strong interface interaction. As a result, the cross-linking strategy can drastically enhance the tensile strength (271.1 MPa (~ 3.6-fold)), modulus (5.71 GPa (~ 17.2-fold)), hardness (685.0 MPa (~ 6.0-fold)), and toughness (8.8 MPa (~ 38.3-fold)), which are superior to those of pristine materials. The facile fabrication process provides many opportunities to design advanced, robust, and integrated nacre-like GO/CA/PVA composites, which can be ideally applied to future aerospace utilizations, electronic protectors, robotic elements, food packaging, tissue engineering, and permeable membranes.