Two-Stage Modeling of Tensile Strength for a Carbon-Nanotube-Based System Applicable in the Biomedical Field

This work presents a two-stage simulation for tensile strength of polymer systems reinforced with carbon nanotubes (CNT), investigating mechanical percolation onset and networking of the interphase zone. In the first stage, the tensile strength of expanded nets comprising CNT and connecting interphase was calculated using Kelly–Tyson theory. In the second step, the strength of systems containing expanded nets and polymer mediums was predicted by an expanded Takayanagi model. Numerous tentative data and analysis of factors were used to confirm the established methodology. The tentative data appropriately approved the model’s outputs, and the roles of all factors in the strength of samples were acceptable. A dense and robust interphase is necessary to create a strong system, while a thin interphase reduces the strength of samples. Slim (radius of 4 nm) and long (length of 20 μm) CNTs improve the nanocomposite strength by 650%, but thick CNTs (radius more than 14 nm) cannot strengthen the polymer mediums.