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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Attainment of cellulose acetate from coir fiber submitted to pretreatment with IL n-butylammonium acetate

Texto completo
Autor(es):
de Andrade Neto, Jose Carlos [1] ; de Almeida, Andressa Carolina [1] ; Machado, Camila dos Santos [1] ; Coelho, Daniella Olmo [1] ; Mourad, Najib [1] ; Teixeira, Natalia Siqueira [1] ; Pereira, Gilberto Jose [2] ; Morandim-Giannetti, Andreia de Araujo [1]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Ctr Univ FEI, Dept Chem Engn, Ave Humberto de Alencar Castelo Branco 3972, BR-09850901 Sao Bernardo Do Campo, SP - Brazil
[2] Ctr Univ FEI, Dept Mat Engn, Av Humberto de Alencar Castelo Branco 3972, BR-09850901 Sao Bernardo Do Campo, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: IRANIAN POLYMER JOURNAL; v. 28, n. 5, p. 425-433, MAY 2019.
Citações Web of Science: 0
Resumo

Cellulose acetate was obtained from the coir fiber submitted to the treatment with the IL. The coir fiber was initially subjected to treatment with the n-butylammonium acetate IL (CFIL) and subsequent bleaching (CFILB). By analyzing the CFILB, it was possible to observe a delignification of 6.10% in relation to the natural material and an 8.1% increase in the concentration of cellulose. The results from SEM, XRD, and FTIR-ART confirm the modifications in the fiber. After characterizing the treated coir fiber and obtaining the cellulose acetate, analyses by NMR confirmed its regeneration with a degree of substitution at 2.92. FTIR analyses corroborate with the obtained data, verifying the presence of the main adsorption bands. The XRD analysis of cellulose acetate shows peaks at 8.5 degrees regarding the randomness after the acetylation of cellulose, as well as peaks between 18 degrees and 22.5 degrees regarding the packing of carbon atoms due to the Van der Waals forces, which confirm the production of cellulose acetate. The thermal analysis shows that decomposition events occurred in two stages, indicating the thermal decomposition of the remaining cellulose, which did not undergo acetylation, and attribution to its thermal degradation. (AU)

Processo FAPESP: 17/05485-3 - Avaliação da adsorção de cromo em carboximetilcelulose obtida a partir de palha de milho modificada e ativada com diferentes líquidos iônicos
Beneficiário:José Carlos de Andrade Neto
Linha de fomento: Bolsas no Brasil - Mestrado