Tailored viscoelasticity of a polymer cellular structure through nanoscale entanglement of carbon nanotubes.

ABSTRACT: A three-dimensional carbon nanotube (CNT) cellular structure presents a unique revelation of microstructure dependent mechanical and viscoelastic properties. Tailored CNT-CNT entanglement demonstrated a direct impact on both the strength and viscosity of the structure. Unlike traditional foams, an increase in the CNT-CNT entanglement progressively increases both the strength and the viscosity. The study reveals that an effective load is directly transferred within the structure through the short-range entanglements (nodes) resulting in an enhanced mechanical strength, whereas the long-range entanglements (bundles) regulate the energy absorption capacity. A three-dimensional structure of entangled CNT-CNT shows ∼15 and ∼26 times enhancement in the storage and loss moduli, respectively. The

SUBMITTER: Ghosh R 

PROVIDER: S-EPMC9417187 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature