3D-printing graphene oxidize based on directional freezing

This paper aims to provide a new process that is based on micro-dispensing and directional freezing to fabricate macro and micro controllable 3D graphene aerogel. In the first section, a design model of the proposed system to print 3D graphene oxide is presented, and the configurations are discussed in detail. The presented new method is contrasted to other few graphene 3D printing process. A process planning is provided includes the complete fabrication process and printing process. The physics mechanism behind the process is illustrated. A list of 2.5D and 3D printed samples are shown. Graphene Oxide solution is an easy to print material for micro-dispensing device, we successfully printed GO solutions in a stable and reliable way. Our freezing based 3D printing process matches well with freeze drying technology, which together composes the key step for fabricating truly 3D graphene aerogel.