Cientistas inventaram o material mais forte e mais leve da Terra

Cientistas inventaram o material mais forte e mais leve da Terra

Cientistas do MIT descobriram um material extremamente forte e excepcionalmente leve que terá inúmeras aplicações.


Durante anos, os pesquisadores souberam que o carbono, quando organizado de uma certa maneira, pode ser muito forte. Caso em questão: grafeno.

O grafeno, que até agora era o material mais forte conhecido do homem, é feito a partir de uma folha extremamente fina de átomos de carbono dispostos em duas dimensões.

Mas há uma desvantagem: embora seja notável por sua magreza e propriedades elétricas únicas, é muito difícil criar materiais tridimensionais úteis a partir de grafeno.

Agora, uma equipe de pesquisadores do MIT descobriu que pegar em pequenos flocos de grafeno e fundí-los seguindo uma estrutura em forma de malha não só retém a força do material, mas o grafeno também permanece poroso.

Com base em experimentos conduzidos em modelos 3D impressos, os pesquisadores determinaram que este novo material, com sua geometria distinta, é realmente mais forte do que o grafeno - tornando-o 10 vezes mais forte do que o aço, com apenas 5% de sua densidade.



A descoberta de um material que é extremamente forte, mas excepcionalmente leve terá inúmeras aplicações. Como informa o MIT:

As novas descobertas mostram que o aspecto crucial das novas formas 3D tem mais a ver com a sua configuração geométrica incomum do que com o próprio material, o que sugere que materiais semelhantes, fortes e leves podem ser feitos a partir de uma variedade de materiais as criar características geométricas similares.

"Você pode usar o material de grafeno real ou usar a geometria que descobrimos com outros materiais, como polímeros ou metais", diz Markus Buehler, chefe do Departamento de Engenharia Civil e Ambiental (CEE) do MIT e Professor de Engenharia da McAfee.

"Você pode substituir o material em si por qualquer coisa, a geometria é o fator dominante, é algo que tem potencial para se transferir para muitas coisas". Projetos estruturais em grande escala, como pontes, podem seguir a geometria para garantir que a estrutura seja forte e sólida.

A construção pode revelar-se mais fácil, dado que o material utilizado será agora significativamente mais leve. Devido à sua natureza porosa, também pode ser aplicado a sistemas de filtração.

"Esta pesquisa mostra uma direção promissora ao unir a força de materiais 2D ao poder do projeto de arquitetura de materiais", diz Huajian Gao, professor de engenharia na Universidade de Brown, que não esteve envolvido neste trabalho. [Futurism]
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