دانلود رایگان مقاله رسوب دهی الکتروفورتیک اکسید گرافن در الیاف کربن

Abstract

Carbon fiber reinforced composites have been attracting increasing attention due to their excellent mechanical properties. However, the interfacial properties of carbon fiber composites tend to be weak because carbon fibers naturally show a weak wettability and adsorption with most polymers matrix. Here, we proposed a method to improve the interfacial properties of carbon fiber composites together with the tensile strength of carbon fiber. Briefly, a layer of graphene oxide (GO) was deposited on continuous carbon fibers by electrophoretic deposition in isopropyl alcohol under ultrasonic treatment. After treatment at 150 °C, the tensile strength of carbon fibers and the interfacial shear strength (IFSS) of carbon fiber/epoxy composites were enhanced by 34.58% and 69.87%, respectively. This method is believed to have applications in continuous production of high-performance carbon fiber composites.

4. Conclusion

In this study, an efficient EPD was proposed to deposit GO sheets onto the surface of carbon fiber. The deposition was carried out in isopropyl alcohol under ultrasonic treatment. It is found that both the tensile strength of carbon fiber and the IFSS of composites were improved significantly. For RGO/CF-U, the tensile strength was enhanced by 34.6% and the IFSS of RGO/CF-U composites improved by 69.9%. We believe the small GO sheets filled in the defects on the surface of carbon fiber suppressed crack propagation on the carbon fiber. Meanwhile, the chemical combination between RGO and carbon fibers, and increased surface roughness are responsible for the enhancement of IFSS in the RGO/CF composites. Moreover, this technology is very simple and 1 min is enough to finish the deposition. We believe this simple and time-saving method can be applied in versatile and scalable fabrication of high-performance carbon fiber, as well excellent carbon fiber composites.