The research team of Professor Yan Shuhong of The University of Science and Technology of China and Professor Liang Haiwei recently developed a new material of “ultra-lightness”, which can experience 2 million compressions still “super-bounce” without deformation, can withstand the “ice fire test” of minus 100 degrees Celsius to minus 500 degrees Celsius, leading the performance in similar materials in the world. Important application prospects. The results of Advanced Materials, a leading academic journal in the field of international materials science, have been published.
(Original title: Chinese scientists have developed ultra-light ultra-bounce material that can withstand the “ice fire test”)
Lightweight, tough and “ultra-elastic” and resistant to high and low temperatures is the ideal material for aerospace, software robots, mechanical buffering, energy damping, and more. Many materials have one or more of these properties, but all are extremely rare.
In recent years, the international academic community has tried to use carbon nanotubes and graphene to develop lightweight ultra-elastic materials, but due to the complexity of the process, but also can only prepare a millimeter-size “small object”, the size of the sample will collapse. On the other hand, some biological materials in nature have excellent mechanical properties, but since they are purely organic or organic/inorganic composite structures, they generally operate only in a very narrow temperature range. For example, the human tendon, can be constantly stretched, is a good anti-fatigue material, but it can only be in the range of human body temperature normal operation. There is wood that is light and tough, but not resistant to high temperatures because it is also an organic matter.
Recently, the team of academicians of the Chinese University of Science and Technology and Professor Liang Haiwei discovered a new method for converting structural biological materials into graphite carbon nanofiber gas gel materials through pyrolysis chemical control.
“Simply put, it’s about drawing on the structure of some natural materials in nature, and then ‘taking away’ the hydrogen and oxygen elements, leaving only carbon. In this way, professor Liang said, biomaterials can be converted into graphite materials.
Experimentally verified, the new graphite aerogel material prepared by the new method has excellent properties, light weight to about 6 mg per cubic centimeter, after 2 million compression cycles can still maintain super elasticity without deformation, in the temperature range of minus 100 degrees Celsius to minus 500 degrees Celsius can maintain super elasticity and fatigue resistance.
According to the introduction, because the new material can be “large size”, large-volume synthesis, and has the economic advantages of biological materials, in space solar cells, supercapacitors, energy bufferand and pressure sensing devices and other fields have important application prospects.