Crucial interfacial shear strength to consider an imperfect interphase in halloysite-nanotube-filled biomedical samples

Abstract

“τc” is defined as crucial interfacial shear strength for effectual shifting of stress through a deficient interphase and its role in the strength of nanocomposites filled with halloysite nanotubes (HNT) is highlighted by progressing the Kolarik model. The developed model assumes mechanical percolation, defective interphase part, and filler/interphase nets. The outputs of the model suitably follow the experimented levels of several samples. The strength of the nanocomposite improves by 15% and 45% at network strengths of 2 and 6 GPa, respectively. Additionally, the crucial interfacial shear strength of 10 and 150 MPa increase the strength of samples by 80% and 10%, respectively. Moreover, the strength of the nanocomposite improves by 18% at an interfacial shear strength of 40 MPa, while the interfacial shear strength of 80 MPa improves the strength of the system by 34%. Furthermore, the strength of samples enhances by 51% at the beginning of percolation at 0.001; however, the strength of the nanocomposite only grows by 25% at the beginning of percolation at 0.01. Accordingly, both network strength and interfacial shear strength directly govern the strength of the nanocomposite, while the crucial interfacial shear strength and the beginning of percolation adversely affect the strengthening effect.

Keywords

• Halloysite nanotubes
• Polymer nanocomposites
• Crucial interfacial shear strength
• Strength
• Imperfect interphase zone
• Mechanical percolation