Multifunctional Flexible Composites Based on Continuous Carbon Nanotube Fiber.

摘要

Continuous carbon nanotube fibers possess high mechanical properties and electrical conductivity, demonstrating the potential of multifunctional applications in various fields. With the support of the Project Multifunctional Flexible Composites Based on Continuous Carbon Nanotube Fiber (grant No. FA9550- 11-1-0124), we systematically studied the synthesis and properties of dry-spun CNT fibers with different spinning techniques, including the tensile strength, compressive strength, microstructure evolution, torsional behavior, electromechanical response, failure behavior, and tensile stress relaxation behavior. The potential use of CNT fiber for torsional sensors have been demonstrated. The interfacial behaviors between CNT fibers and graphene film, PDMS, epoxy resins have also been examined. Molecular dynamics simulations of the fiber structural evolution from CNT array to film to fiber and the resulting mechanical behavior were conducted to gain insight into the fundamental strengthening mechanisms. To demonstrate the multifunctional applications of CNT fiber, we further designed and fabricated transparent, stretchable conductors based on CNT fibers and PDMS. Finally, the synthesis and electromechanical behavior of graphene based continuous fibers.