Print various shapes graphene airgel 3D
Liftis probably the most famous in 2010 two scientists with in-depth research on graphene, share Nobel Prize in Physics. Recently came news of Fudan University, the school with researchers at the National University of Singapore cooperation in research and development, seeking to prepare new graphene high efficiency, the core of this technology will be very easy to \”zoom in\” to the industry. With the traditional papers, different paths enterprises, the research group is completely the opposite of to – – 2013 innovations, patented in 2014, in 2015 after the domestic patent transferred to a company, just published online in \”Nature Communications?.\” One group leader, Department of Macromolecular Science, Fudan University, State Key Laboratory of Molecular Engineering of Polymers Lu Hongbin, said: \”Good things should be put off, probably down a little bit better.\” Innovative products become functional additives graphene not only because the Nobel Prize is well known, it has long been closely linked with life. Already exists in nature, but it is difficult to peel out of a single layer structure. The graphene layer is laminated graphite, graphite 1 mm thick layer comprising approximately 3,000,000 graphene. Pencil lightly across the paper, leaving traces of it could be several layers of graphene. Its perfect two-dimensional structure, graphene has become many innovative products, functional additives. After addition of specific example, which is a polymer coating with barrier properties can extend the life of the paint coating; conductive agent was added to make a battery, may be more convenient for electronic transport, improve charging speed; electrothermal apparatus and add some fibers that special conductive, thermal conductivity, allowing product performance to a new level. So useful things, that better preparation also become the target of academia and industry together to compete. Two scientists at the University of Manchester, UK Andre? Jim and Kostya? Tarnovo consumer Love found that they can use a very simple way to get thinner and thinner graphite flakes. They peeled off from highly oriented pyrolytic graphite graphite sheet, then the sheet is adhered on both surfaces of a special tape, the tear tape, the graphite sheet can be divided into two, the operation is repeated so that thinner sheet, Finally, they give only a sheet comprising a single layer of carbon atoms, that is graphene. After that, a new method for the preparation of graphene after another, after five years of development, it was found that the graphene into the realm of industrial production has been close. Graphene solve the problem of large-scale applications for graphene,Luhong Bin given three \”best\” rate: thinnest conventional materials, only 0.335 nm; the highest intensity, is 100 times stronger than steel; better thermal conductivity than the metallic silver higher than 10 times, in addition to its electron mobility high rate two orders of magnitude higher than that of silicon. The new two-dimensional material, in many fields of intelligent equipment, aerospace, energy storage and environmental governance huge application potential, is an important strategic emerging materials. But how to achieve high-quality graphene with high efficiency, large-scale preparation, has been a key problem restricting the large-scale application. In fact, the graphene is a naturally occurring in nature, the ideal solution is prepared from natural flake graphite, graphene to be peeled off in a particular solvent in the liquid phase. In other words, since the graphene is hydrophobic, the active agent must be added in a large amount of peeling environmental fluid, otherwise difficult to peel. Common practice often prepared graphene 1 t, 3 t need to add an oxidizing agent such as potassium permanganate, it changes to graphene oxide, and then reducing the release, the process oxidation, reduction, and many cleaning wastewater generated, and let graphene lost some unique properties. How to overcome these challenges? The researchers used a non TF stable dispersion policy, by introducing a very small amount of oxygen-containing functional groups ionizable in the graphene surface, fast, high yield at very high concentrations peeling peeling 90% or more as a single product graphene lattice defects and less effective solution to the large-scale application of graphene in storage and transport problems. Further, the graphene phase aqueous slurry prepared by this method exhibit excellent rheological properties, various shapes can be prepared directly by 3D printing graphene Aerogels , such as the storage graphene , applications of environmental management, multi-functional composite materials has opened up new avenues.