Further Application Of Carbon Aerogels
Further application of carbon aerogels
Researchers have developed carbon aerogels that can be stretched to 3 times their original length and recovered. The product has the same strength of elasticity as rubber belts. By using the existing properties of aerogels (including ultra-low density, light weight, high porosity and high conductivity) and reversible tensile properties, the applications of carbon aerogels have been greatly increased.
It is proved that pure inorganic materials can also have rubber elasticity. Rubber carbon aerogels create a new type of material, which combines ultra light, constant temperature, high elasticity and good mechanical properties.
Demand for stretchable electronic devices is increasing. Recently, researchers have been seeking ways to improve the elasticity of carbon aerogels, which usually do not get good elastic properties.
In this new work, scientists have designed a carbon aerogel consisting of graphene (a two-dimensional material) and multi walled carbon nanotubes (carbon nanotubes, one-dimensional materials), which are assembled into four levels from nanometer to centimeter. In order to make materials into aerogels, the researchers made ink composed of graphene oxide and nanotubes, and then formed aerogels through inkjet printing.
In the test, the researchers proved that the tensile strength of the new aerogel was 5 times higher than that of the previous aerogel. They also found that strong atom binding between graphene and carbon nanotubes produced synergistic effects, resulting in greater elasticity and stability. In addition, the new aerogels can withstand extreme temperatures, which are different from most previous attempts in extensible aerogels, which become viscous or brittle when exposed to heat or cold.
In order to be applied to other fields, the researchers attached three new stretchable aerogels to the joints of snake like robots. Aerogels are used as sensors to monitor the movement and configuration of robots. Unlike traditional sensors that can only detect unidirectional deformation, aerogel sensors can distinguish multiple configurations, indicating that the new generation of sensors has the ability to recognize complex shape changes logically.
Other potential applications of extensible aerogels include wearable electronic devices, aerospace applications, capacity and energy storage as well as light mechanical equipment, especially at extreme temperatures.
This rubber carbon aerogel produced many possibilities. "First, the strength and young modulus of carbon rubber [tensile elasticity] are lower than that of polymer elastomers. In general, the young's modulus of polymer rubber is 1-2 orders of magnitude higher than that of our carbon rubber.
"Secondly, we are working hard to improve the mechanical properties of carbon aerogels to withstand extreme and complex deformation, such as higher elongation and twist. At the same time, more application fields of this new type of carbon rubber can be explored, and other types of inorganic rubber grading and collaborative assembly methods can be used.