Multifunctional nanocomposites based on alignment of graphene nanoplatelets

Case ID:

2023-026

BACKGROUND

Since its isolation in 2004, applications for graphene (atomic-scaled carbon hexagonal lattice) have been highly sought after, particularly due to its lightweight nature, high modulus, strength, and surface area to volume ratio. A promising form is created by employing graphene nanoplatelets in resin and orienting them with an electric field to produce a polymer nanocomposite. The resin has drastically improved mechanical performance and predictable thermal and electrical properties. However, current processes result in alignment along one axis, affecting properties in only one direction, instead of creating a plane of nanoplatelets. Many researchers have tried to achieve graphene orientation along two axes to establish a planar alignment enabling three-directional control of properties, without success. Lacking the ability to control graphene nanoplatelets in more than one direction hinders the potential of this technology from being realized.

SUMMARY OF TECHNOLOGY

Researchers at OSU have developed a novel method to produce multifunctional nanocomposites with precisely aligned graphene nanoplatelets. Broadly, graphene nanoplatelets can be positioned within a matrix such as epoxy resin on two dimensional axes, creating a planar alignment. The graphene nanoplatelets are dispersed into a liquid resin matrix and during curing, electrical fields induce an alignment lattice in a planar fashion. This results in the ability to control material properties in three directions, whereas the current state of the art can only achieve this unidirectionally. Alignment control to this degree can induce anisotropic modulus, fracture toughness, electrical, and thermal properties, enabling advancements in a wide range of material applications, from armor to battery electrolytes to lightning strike protection.

POTENTIAL AREAS OF APPLICATION