Chinese scientists have developed super tough green materials by imitating shells

 Chinese scientists have developed super tough green materials by imitating shells

Shell is a kind of natural material with excellent performance, which is made of brick mud structure layer by layer. Recently, academician Yu Shuhongs team successfully constructed a brick fiber shell like layered structure by using two natural components, namely, nano clay sheet and bacterial cellulose, and developed a high-performance composite film material by aerosol assisted biosynthesis.

Simply put, bacterial cellulose is a substance secreted by bacteria after eating glucose, which is thin and long like a rope. Guan Qingfang, a member of the research team and a postdoctoral fellow at the University of science and technology of China, said that combining it with flake clay was like binding layers of bricks with a rope net to form a new material with strong performance.

The experimental results show that the strength of the new film material reaches 482 MPa, which is more than 6 times of the commercial plastic film. It has good flexibility and can be folded into various shapes without obvious damage after unfolding. The new material also has excellent light transmittance, achieving a high transparency of more than 73% and a high optical haze of more than 80% in the visible light range of the human eye.

Like the effect of wool glass, it allows light to penetrate but not to be dazzling, and this uniformity is very important for making devices such as mobile screens. Guanqingfang said.

Traditional plastic film is easy to soften and deform at high temperature. Compared with this new material, this new material has excellent thermal stability. When the temperature changes by 100 u2103, the size change is only 3 / 10000, and the structure and performance are still stable at 250 u2103.

Whats more, the unique raw material composition makes the new material green and pollution-free in the whole life cycle. Bacterial cellulose will degrade naturally in soil about two months.

Recently, cell Publishing Groups academic journal matter published the research results. It is known that this new type of material has the advantages of high flexibility, low cost and so on. At present, the scientific research team is actively promoting the application and industrialization.

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