The Influence of Surfactant on Sizing Agents and the Interface of CF/PEEK Composites

The effect of sodium dodecylbenzenesulfonate (SDBS) surfactant on dispersion performance of sodium styrene sulfonate hydrate modified polyethersulfone (sPES) sizing and the interface of carbon fiber reinforced polyether ether ketone (CF/PEEK) composites was studied. The addition of SDBS reduced the particle size of the sPES dispersed in water, improving the film-forming and stabilization of the sizing agent. It was found that the SDBS would not affect the interfacial adhesion of CF/PEEK composites when the weight of SDBS was below 0.6 wt%, but the excessive amount of SDBS seriously reduced the interface strength in composites. Finally, the enhancement mechanism of the sPES/SDBS sizing agent for CF/PEEK composites interface was elaborated.