Mechanical properties of carbon fiber composites modified with nano-SiO₂in the interphase

Abstract

The performance of carbon fibers-reinforced composites is dependent to a great extent on the properties of fiber-matrix interface. To improve the interfacial properties in carbon fibers/epoxy composites, nano-SiO 2 particles were introduced to the surface of carbon fibers by sizing treatment. Atomic force microscope (AFM) results showed that nano-SiO 2 particles had been introduced on the surface of carbon fibers and increase the surface roughness of carbon fibers. X-ray photoelectron spectroscopy (XPS) showed that nano-SiO 2 particles increased the content of oxygen-containing groups on carbon fibers surface. Single fiber pull-out test (IFSS) and shortbeam bending test (ILSS) results showed that the IFSS and ILSS of carbon fibers/ epoxy composites could obtain 30.8 and 10.6% improvement compared with the composites without nano-SiO 2 , respectively, when the nano-SiO 2 content was 1 wt % in sizing agents. Impact test of carbon fibers/epoxy composites treated by nanoSiO 2 containing sizing showed higher absorption energy than that of carbon fibers/ epoxy composites treated by sizing agent without nano-SiO 2 . Scanning electron microscopy (SEM) of impact fracture surface showed that the interfacial adhesion between fibers and matrix was improved after nano-SiO 2 -modified sizing treatment. Dynamic mechanical thermal analysis (DMTA) showed that the introduction of nano-SiO 2 to carbon fibers surface effectively improved the storage modulus of carbon fibers/epoxy.

Preparation and characterization of Polyethylene/Clay/Silver nanocomposites using functionalized polyethylenes as an adhesion promoter

“…Strong interactions between fillers and polymer matrix could promote an additional reinforcement for mechanical stiffening of nanocomposites. [18][19][20] This figure shows the results of dynamic mechanical analysis of neat PE and composites at 20 wt% of various compatibilizers. Storage modulus increased only slightly when using IA compared with MA compatibilizer.…”

Effect of SiO2 nanoparticles‐decorated SCF on mechanical and tribological properties of cenosphere/SCF/PEEK composites

“…In recent years, the hybrid of fibers and nanoparticles is a novel technology which can effectively improve the interface bonding between fibers and matrix . Zhang et al . treated the surface of carbon fibers with epoxy sizing agent containing nano‐SiO 2 .…”

Effect of Compatibilizer on Polyethylene/Clay/Silver Nanocomposite Properties

“…This can promote an increase in the interphase between fillers and polymer matrix and decrease the effective polymer chain mobility. In addition, these interactions could promote an additional reinforcement for mechanical stiffening of nanocomposites . It can be seen that PEgDMAE compatibilizer shows higher storage modulus and these values are even higher when composites were prepared by method A (Silver‐Compatibilizer).…”