| 초록 |
Graphene oxide (GO) exhibits good dispersibility and colloidal stability in an aqueous solution based on its functional groups on the basal plane and edges. These properties enable solution processing of GO for various forms of GO-based products such as fiber, membrane, aerogel, etc. In the processing of these applications, controlling the colloidal properties of GO dispersion is essential as they can ultimately change the physical property of GO products. For example, gelation of GO colloids can dramatically increase the mechanical modulus of GO fiber. Here, we propose a strategy to induce the gelation of GO and thus form a network structure via mild thermal annealing. The mild thermal annealing retains the functionality of GO but induces gelation without any additives, which can expand its applicability to various GO gel state-based processing such as 3D printing and dry spinning. |
