Microstructure and properties of carbon fiber sized with pickering emulsion based on graphene oxide sheets and its composite with epoxy resin

Abstract

The Graphene oxide (GO) sheets were used for preparing the epoxy resin Pickering emulsion. The particle size and the zeta potential of the Pickering emulsion were measured to evaluate its stability. The stable emulsion could be served as the film former of sizing agent for carbon fiber (CF). The effect of the Pickering emulsion stabilized by GO sheets on the properties of CF and the interfacial adhesion property of CF reinforced composite were investigated. Scanning electron microscopy (SEM) images showed that there existed a layer of sizing agent film with GO sheets evenly on the CF surface. Abrasion resistance and stiffness values of CF were tested and the results indicated that the sized CF conformed to the requirement of CF handleability. The interlaminar shear strength (ILSS) test indicated that the interfacial adhesion of the composite could be greatly improved. The fracture surfaces of CF composites were examined by SEM after ILSS tests. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42285.

Enhanced mechanical and thermal properties of short carbon fiber reinforced polypropylene composites by graphene oxide

“…The results are shown in Fig. e and f. The FTIR results of graphite and GO were discussed and consistent with our previous report . In Fig.…”

“…The AFM image of the lamellae of GO is demonstrated in Fig. c and d. The result reveals that the thickness of irregular GO is about 1 nm, which is a symbolic feature for the exfoliated GO .…”

“…The GO sheets were synthesized according to the modified Hummers and Offeman's methods as described in our previous reports .…”

Nanoscale toughening of carbon fiber‐reinforced epoxy composites through different surface treatments

“…Large surface roughness (60.3 nm) along with high ‐C=O content (33.14%) could sufficiently provide a stronger physicochemical bonding and strengthen contact region in the interface. This phenomenon is consistent with previous Wang's research : CFs covered by GO sheets had wrinkled textures as well as pendant oxygen‐based groups, facilitating wettability and forming strong hydrogen bonds between CF and EP resin.…”

“…To be specific, both IFSS and ILSS of GO‐deposited CFRP composites witness remarkable increase (37.5% and 25.3%) compared with virgin CFs. This is because a rougher and functional surface is in favor of stronger interfacial adhesion in CF/GO composites , as shown in Fig. a.…”