Graphene oxide fiber to achieve precise and reversible macroscopic materials

Wen/Chen Gen In "Journey to the West", Monkey King can change seventy-two, and after the change, he can change back without any difference, perfectly realizing the precise and reversible character
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Unfortunately, humans in real life do not have this reversibility, but recently scientists have discovered that materials can do it
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Recently, scientists have used the two-dimensional elementary structure of graphene oxide fibers and the dynamic characteristics of large-volume shrinkage to achieve precise reversibility of macroscopic materials
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The so-called precise reversibility means that the number, size, composition, structure and performance of the object are required to be restored to the original state after a cycle of fusion and splitting
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Carbon is one of the most stable elements in nature, and graphite is the most stable element of carbon
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Scientists have discovered that at the centimeter-level macroscopic scale, graphene oxide fibers can not only be deformed and assembled, but can also be restored after being decomposed and assembled
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This shows that adaptive deformation is a unique ability of graphene oxide sheets, that is, to achieve precise and reversible splitting on a macro-scale
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In the study, the scientists used 13,500 graphene oxide fibers to fuse into a slender black column with a diameter of 1.
2 mm, which can withstand 680 times its own weight of gravity
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In order to verify the precise reversibility of the graphene oxide column, they placed the black column in a water solvent and reduced the original black column to 13,500 fibers through steps such as dissociation and splitting
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In this process, the volume expansion rate of graphene oxide reached nearly 40 times, providing sufficient space for surface deformation
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In order to verify whether the deformed graphene oxide fiber has the original function, the scientists re-woven the fiber into a flexible net, and found that the flexible net still has the corresponding strength, even if a toy car is placed on the net, it will not break
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Since the shell structure of graphene oxide fibers is as compact as skin tissue, it can maintain the integrity of a single assembled fiber, and the reversibility of fusion and splitting can also be guaranteed
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After the cycle of fusion and splitting, the size, composition, quantity, structure and performance of graphene oxide fibers can also be restored to the original state before the cycle..
Compared with previous studies, graphene oxide-based fiber materials are large in size and have strong controllability.
This has certain enlightening significance for the recovery and reuse of materials, and the study of the unique phenomena of solid interfaces in the reversible assembly process, and will be accurate in the future.
Reversible assembly will also have a positive effect
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In addition, the precise reversibility of graphene oxide-based fibers can also be replicated to other materials, such as coating a layer of graphene oxide on the surface of nylon, metal, stainless steel wire, glass fiber, etc.
, these materials can also produce "assembly-precision Restore” function
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In the future, it is hoped that through further mechanism research, more in-depth understanding of the assembly structure of two-dimensional macromolecules can be obtained, so as to broaden the practical application of this material in many fields
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