Obtenção de nanocelulose do resíduo de bagaço de cana-de-açúcar para o reforço em máscaras cirúrgicas de Tecido Não Tecido (TNT)
Nenhuma Miniatura disponível
Data
2022-05-25
Autores
Zortea, Luciana Ferreira
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal do Espírito Santo
Resumo
The Covid-19 pandemic has brought up the discussion about the effectiveness of personal protective equipment (PPE). Among the improvement research of PPE, nanocellulose films stand out and the sugarcane bagasse is the lignocellulosic residue used for the production of nanocellulose. The objective of the work was to produce and characterize cellulose nanofibrils from sugarcane bagasse residue and apply them in surgical masks made of NWT. The sugarcane bagasse was chemically treated and XRD, FTIR and chemical characterizations were performed. To obtain the nanofibrils the combination of enzymatic hydrolysis and mechanical fibrillation (NFC-HE) and the mechanical fibrillation process (NFC) were used. The application of the cellulose nanofibrils on the NWT masks was performed by spray coating technique. Bacterial filtration and breathability analyses were performed on the coated masks. The results showed that the NFC-HE films presented better characteristics in relation to contact angle, density, porosity, transmittance and transparency and vapor permeability than the NFC films. The masks that received the coating showed an average filtration efficiency of 99.68% (NFC) and 99.80% (NFC-HE). Regarding breathability, the NFCHE coated masks presented mean values of 79.75 Pa/cm² and the NFC coated ones mean values of 106.00 Pa/cm². The results obtained in this study showed that the pretreatment of enzymatic hydrolysis before mechanical processing to obtain nanocellulose significantly improves their quality and that the coating of nanocellulose can be applied to improve the barrier capacity of materials used in the manufacture of surgical masks.
Descrição
Palavras-chave
Resíduos agroindustriais , Hidrólise enzimática , Nanofibrilas de celulose , Máscaras cirúrgicas de TNT