Interfacial stress transfer factor and tensile strength of polymer halloysite nanotubes systems

Abstract

Even though numerous papers have studied the mechanical properties of polymer halloysite nanotubes (HNT) nanocomposites by experimental characterizations, only a few researchers have simulated the characteristics of these materials. Moreover, the previous papers have disregarded the interphase features for the mechanical performance of HNT‐reinforced systems. In this article, two simple models are progressed for tensile strength of HNT‐based nanocomposites supposing HNT size and interphase section. The models' calculations are linked to the measured data and the characters of all factors in the strength are explained. In addition, the advanced models are used to define the “s” as interfacial stress transfer factor for HNT‐filled nanocomposites. The influences of various factors on the “s” are validated to approve the novel equation. All forecasts appropriately follow the measured data at various HNT loadings. “s,” interfacial shear strength, interphase thickness, and HNT length directly control the nanocomposite's strength, but HNT radius and polymer's strength have inverse effects. Additionally, the highest value of interfacial shear strength produces the maximum level of “s,” but HNT size negligibly manipulates the “s.”

Construction of core–shell‐structured halloysite nanotubes with TiO2 nanoparticles for ultra‐high‐molecular‐weight polyethylene (UHMWPE) nanocomposites with improved wear resistance

“…It has been regarded as a potential alternative to replacing carbon nanotubes for polymer reinforcement. 13,14 Recently, HNTs have been utilized as a functional filler to improve the tribological properties of polymers. [15][16][17] The introduction of HNTs contributes to the formation of tribofilm so as to improve the tribological properties of HNT/polymer composites.…”

“…Halloysite nanotube (HNT), a type of natural nanotubular clay, possesses many attractive advantages including biocompatibility, environmental friendliness, and low price. It has been regarded as a potential alternative to replacing carbon nanotubes for polymer reinforcement 13,14 . Recently, HNTs have been utilized as a functional filler to improve the tribological properties of polymers 15–17 .…”

Multifunctional epoxy/carbon composites with a fully reparable interface

“…Different mechanisms, such as surface tension, macromolecular interdiffusion, electrostatic attraction, chemical bonds, and mechanical adhesion are involved in the fiber/matrix interaction. [6][7][8] The overall effect played by these factors can be evaluated considering the interfacial shear strength (IFSS) of the composites. One of the most important methods to evaluate the IFSS is the so-called microdebonding test, 9 in which small droplets of the matrix material are deposited on fiber monofilaments.…”

“…This region has been often considered isotropic and homogeneous but recently, it has been discovered that it is composed by a multiphase structure with peculiar properties. Different mechanisms, such as surface tension, macromolecular interdiffusion, electrostatic attraction, chemical bonds, and mechanical adhesion are involved in the fiber/matrix interaction 6–8 . The overall effect played by these factors can be evaluated considering the interfacial shear strength (IFSS) of the composites.…”