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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.)

Influence of alkaline treatment on sisal fibre applied as reinforcement agent in composites of corn starch and cellulose acetate matrices

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Author(s):
Matos de Freitas, Roberta Ranielle [1] ; do Carmo, Karina Palmizani [1] ; Rodrigues, Jessica de Souza [2] ; de Lima, Vitor Hugo [2] ; da Silva, Joelen Osmari [2] ; Botaro, Vagner Roberto [2, 1]
Total Authors: 6
Affiliation:
[1] Fed Univ Ouro Preto UFOP, St Diogo de Vasconcelos 122, BR-35400000 Ouro Preto, MG - Brazil
[2] Fed Univ Sao Carlos UFSCar, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: PLASTICS RUBBER AND COMPOSITES; v. 50, n. 1 SEP 2020.
Web of Science Citations: 0
Abstract

This study show influence of alkaline treatment on sisal fiber (SF) in different composites of starch matrices (SM) and cellulose acetate matrices (CAM). SF were modified with an aqueous 0.5M NaOH solution. Composites were prepared in proportion of 3% fiber/matrix (m/m) using casting method. The samples were characterized by Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy by Attenuated Total Reflection (FTIR-ATR), Thermogravimetric Analysis (TGA) and Dynamic-mechanical thermal analysis (DMA). Through results obtained in FTIR and TGA, it was possible to verify that alkaline treatment partially removed hemicellulose and SF lignin. With SEM, best fiber/matrix adhesion in composites prepared with modified fiber (TSF) has been proven to change fibre morphology. Through DMA analysis it was possible to observe that after addition of SF and TSF, SM composites showed improvements in mechanical properties, while TGA showed an increase in initial temperature of thermal degradation in CAM composites with addition of fiber. (AU)

FAPESP's process: 16/19896-2 - Study of dynamic thermal-mechanical behavior of polymeric hydrogels films for application as future biocompatible materials
Grantee:Vagner Roberto Botaro
Support Opportunities: Regular Research Grants