Study on the enhancement of the interface performance between CF and polyimide by triethylamine grafting nano‐TiO₂ particles

Abstract

The TiO2 is grafted by triethylamine and is introduced on the surface of the carbon fiber, which improves the wettability and activity of the carbon fiber surface and at the same time strengthens the carbon fiber/polyimide composite. Fourier transform infrared spectroscopy (FTIR) and X‐ray photoelectron spectroscopy (XPS) confirmed the triethylamine grafting successfully on TiO2. Scanning electron microscope (SEM) results show that when the trimethylamine concentration is 1.0%, a uniform coating is formed on the surface of the carbon fiber. The interlaminar shear strength (ILSS) and interfacial shear strength (IFSS) were increased by 32% and 69%, respectively.

A new strategy for improvement of interface and mechanical properties of carbon fiber/epoxy composites by grafting graphene oxide onto carbon fiber with hyperbranched polymers via thiol‐ene click chemistry

“…Chemical grafting of nanomaterials such as carbon nanotube (CNT), graphene oxide (GO), and nano titanium dioxide (nano TiO 2 ) is a common surface modification method for preparing high-performance CFs. [22][23][24][25][26] The introduction of nanomaterials not only promotes stress transfer and prevents internal stress concentration but also increases the diversity and selectivity of the CF surface. As a typical carbon nanomaterial, GO presents a series of outstanding traits, including high strength, flexibility, and huge surface area.…”

A coordination-connected flexible-rigid hybrid nanoparticles coating for the interfacial enhancement of carbon fiber/polyetheretherketone composites

“…As a rigid nanoparticle, nano-TiO 2 could impede crack propagation and alleviate stress concentrations [20]. Li et al [21] grafted nano-TiO 2 onto CF surface to enhance the interfacial interaction of CF/polyimide (PI) composites, which strengthened the ILSS by 32%. However, the introduction of a signi cant number of rigid particles at the interface could cause a propensity for load transfer to penetrate deeply into the CF rather than propagate along the interface, thereby promoting the brittle failure at the interface [22,23].…”