Progression of Ouali model by the strengthening and percolating efficacies of interphase for polymer halloysite nanotubes composites applicable in the biomedical products

The Ouali model is used to approximate the tensile strength of a halloysite nanotube (HNT) system after the start of percolation. The proposed model reflects the interphase and its roles in the percolation start and strengthening of samples. The outputs of the proposed model are matched to tested data, and the impressions of all parameters on the strength of the samples are evaluated. Experimentally measured results of numerous examples as well as parametric studies validate the established model. The strength of the nanocomposite is directly associated with the depth (t) and strength (σ_i) of the interphase section. At t = 5 nm, the strength of the system improves by 6%, whereas at t = 40 nm, the strength of the nanocomposite increases by 46%. At σ_i = 50 MPa, the strength of the samples increases by 5%, whereas at σ_i = 400 MPa, it increases by 35%. Furthermore, the results show an inverse correlation between the strength of the system and the HNT radius. The HNT concentration directly affects the strength, and at an HNT volume portion of 0.04, the strength of the nanocomposite increases significantly by 78%. Nonetheless, the percolation start and HNT length do not significantly affect the strength of the nanocomposites. The present samples can be applied in the biomedical fields, due to their excellent properties.