| 초록 |
Graphene oxide liquid crystal (GO LC) has attracted much attention in graphene-based applications such as fibers and films. As the processing of the applications requires a good colloidal stability of GO suspension, understanding GO as two-dimensional colloids is important. For example, GO suspension easily vitrify near 1 wt% of GO accompanying the viscosity increase which can decrease the processiblity in the application level. Thus, for more advanced GO-based applications, a deeper understanding towards the colloidal properties and its molecular level structures are required. Here, we studied the colloidal stability and the microstructure of GO LC with extensive small angle x-ray scattering and rheometry experiments. We show that adding polymer into GO suspensions can improve the colloidal stability and reduce the viscosity of suspension via molecular weight dependent polymer induced interactions. |
