Tecnologia em Metalurgia, Materiais e Mineração
https://tecnologiammm.com.br/article/doi/10.4322/2176-1523.0857
Tecnologia em Metalurgia, Materiais e Mineração
Artigo Original

PRODUÇÃO DE NANOFIBRAS DE CARBONO A PARTIR DE RESÍDUOS DE LUVAS CIRÚRGICAS

PRODUCTION OF CARBON NANOFIBERS FROM SURGICAL GLOVES

Alves, Joner Oliveira; Tenório, Jorge Alberto Soares; Zhuo, Chuanwei; Levendis, Yiannis Angelo

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Resumo

O látex tem sido aplicado em diversos produtos, desde material hospitalar a balões de festas, acarretando em um grande volume de resíduos deste polímero. Neste trabalho foi estudado o reaproveitamento de resíduos de látex como matéria-prima para produção de nanofibras de carbono. Para tanto, amostras de luvas cirúrgicas de látex foram incineradas em um forno elétrico sob uma temperatura de 1000 °C e atmosfera controlada com adições de jatos de O2 e N2 . O efluente da queima foi submetido a um filtro de SiC e repassado a um segundo forno mantido a 1000 °C. Telas de aço inoxidável AISI 304 foram dispostas no forno secundário para atuarem como catalisador. Partículas de carbono sólido foram formadas na superfície da tela catalisadora. A microscopia eletrônica de varredura foi empregada para verificar a microestrutura das partículas produzidas. Os resultados mostraram a formação de nanofibras de carbono com comprimentos da ordem de 50 µm e diâmetros entre 80 e 200 nm. Outra estrutura formada apresentou características semelhantes da grafita.

Palavras-chave

Látex, Catálise, Combustão, Nanomateriais.

Abstract

The latex has been used in several products, from hospital materials to balloons party, generating a large amount of wastes from this polymer. This study investigated the reuse of waste latex as raw material to produce carbon nanofibers. For this purpose, latex samples from surgical gloves were incinerated in an electric furnace at temperature of 1000 °C, and atmosphere controlled by additions of O2 and N2 jets. The combustion effluent was subjected to a SiC filter and transferred to a second furnace maintained at 1000 °C. AISI 304 stainless steel meshes were introduced in the second furnace in order to work as a catalyst. Solid carbon particles were formed on the surface of the metal catalyst. The scanning electron microscopy was used to characterize the microstructure of the produced particles. Results showed the formation of carbon nanofibers with lengths of about 50 micron and diameters in the range of 80-200 nm. Another formed structure has characteristics similar of the graphite.

Keywords

Latex, Catalysis, Combustion, Nanomaterials.

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