Graphene Oxide (GO) has been announced as a highly anticipated material because solution process is applicable, utilizing its high solubility in various solvents, which is important for industrial application. Taking advantage of soluble process, GO c...
Graphene Oxide (GO) has been announced as a highly anticipated material because solution process is applicable, utilizing its high solubility in various solvents, which is important for industrial application. Taking advantage of soluble process, GO can be processed as a various form such as a film, fiber, membrane, composite and etc. Among them, in a couple of years, GO liquid crystalline (LC) fiber has been received great attention due to high expectations in terms of multifunctional performances. Compared with other materials such as Carbon Nanotube fiber (CNTF) and Carbon Fiber (CF), unfortunately, the mechanical property of GO LC fiber is relatively low. This is mainly because many voids were created when they are assembled into the fiber form. In other words, the nature of high aspect ratio of GO sheets as well as various oxide groups in GO sheets inevitably induces voids in GO fiber. Accordingly, there have been many efforts to fill these voids with other materials so as to increase the mechanical property of GO fiber. In this study, since functional groups of NFC are capable of hydrogen bonding with GO, we used Nano Fibrillated Cellulose (NFC) as a filler for GO/NFC composite fiber. It is found that LC phase in aqueous media for NFC and GO shows both nematic phase and no phase separation, indicating good miscibility between two materials. After that, we make a composite fiber enhanced by making interfacial bonding between two materials using Ethylenediamine (EDA). The EDA treated GO/NFC composite fiber showed enhanced mechanical property about 13.6 times higher than that of pristine GO fiber.