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New 3D printing process, graphene aerogel is more refined

2019-05-14
Two dimensional material-Graphene
Graphene is a two-dimensional material with unique properties, but to make full use of it, it must be reproduced in 3D. The good news is that researchers at Virginia Tech have demonstrated their newly developed 3D printed graphene aerogel solution with a much higher resolution than previously. In general, graphene only needs to be in the form of "a single-layer thickness of carbon atom sheet". Although it has been applied in some cases, it is still far from the actual investment.

New technology related to graphene aerogels
New technology allows graphene aerogels to be 3D printed into larger shapes
Simply stacking materials can reduce their strength and unique electrical, chemical, and optical properties, because there is not much difference from ordinary graphite at this time.
However, the porous form of "graphene aerogel" managed to fill the voids of 2D graphene with air. Other methods involve forging graphene into a 3D shape using a laser, compressing into a porous coral structure, foam 3D printing, or being supported by carbon nanotubes.
Graphene aerogels are extremely lightweight and can even be placed on strawberry filaments without falling.
The problem with graphene aerogels is that the method of shaping them into the desired shape is not at all simple. In the past, it could be squeezed into filaments that were as thin as 100 microns, but it was difficult to make further breakthroughs.
Graphene and 3D printing Technology
The new study at Virginia Tech is to improve this. The author of the paper, Zheng Xiaoyu, said: "With this technology, you can create very limited structures. But because there is no support, the fineness is quite limited and you can't get more free form factors."
All they do is design these graphene layers into any high-resolution shape you want. To this end, the researchers prepared a hydrogel from graphene oxide and added cross-linked sheets. It is then separated using ultrasonic waves and combined with a light sensitive acrylate polymer.
Next, the team can use time-projection micro-stereolithography – a very accurate form of 3D printing that builds structures on a scale – creating rigid long chains of polymer with graphene oxide inside.