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It turns out that graphene also has the special function of repelling mosquitoes.

Time : 2019-09-30 Hits : 12

As a two-dimensional nano-material, graphene has excellent physical and chemical properties. It is the thinnest but hardest nano-material discovered by human beings at present. Its hardness is 200 times that of steel. It has excellent electrical and optical properties, and its resistivity is only 10-6_.· M, is the lowest resistivity material in the world at present; it has good thermal conductivity, with a thermal conductivity of 5300 W/(m.K) at room temperature, and has exceeded the limit of isomorphic bulk graphite, carbon nanotubes and diamonds, far exceeding metal materials such as silver and copper; it has high specific surface activity, excellent adsorption performance and dares to absorb 800 lead. Mg/g, much higher than activated carbon.

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Graphene, as a very flexible super "universal" material, can be used to manufacture solar cells, body armor, night vision devices, etc. Recently, a study by Brown University in the United States shows that graphene oxide, a derivative of graphene, also has mosquito repellent effect, when the tester coats the skin with transparent graphene oxide thin film. After the film, it was found that few mosquitoes would stay outside the surface of the dry graphene oxide film. Even if the mosquito stayed, it would be difficult to penetrate the graphene oxide film. This means that graphene oxide can become a barrier to interfere with mosquitoes.

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It is worth noting that mosquitoes would have identified the location of the target object by detecting the chemical composition of human skin, but when the tester wrapped the clothes with graphene oxide, the mosquitoes not only did not bite the protected skin, but also did not bite the exposed skin

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"We thought graphene oxide was a physical barrier that prevented mosquitoes from biting, but when we finished these experiments, we began to think that graphene oxide was also a chemical barrier that prevented mosquitoes from feeling human existence," said Cintia Castilho, the lead author of the study and a student of Dr. Brown.

William Suk of NIEHS Superfund Research Program Doctor said that the knowledge gained from this study could lead to the development of new mosquito-repellent clothing, so that people in tropical areas can reduce the probability of mosquito-induced infectious diseases, such as dengue fever, Japanese encephalitis, etc., and also reduce the number of mosquito-repellent products used, without affecting the nervous system due to excessive spraying.

(Source: Textile Reporter)

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