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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 8
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: IRANIAN POLYMER JOURNAL; v. 28, n. 5, p. 425-433, MAY 2019.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 17/05485-3 - Evaluation of chromium adsorption in carboxymethylcelulose obtained from corn straw modified and activated with different ionic liquids
Grantee:José Carlos de Andrade Neto
Support Opportunities: Scholarships in Brazil - Master