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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.)

Use of ball mill to prepare nanocellulose from eucalyptus biomass: Challenges and process optimization by combined method

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Author(s):
Ferreira, Rafaela R. [1] ; Souza, Alana G. [1] ; Nunes, Lucas L. [1] ; Shahi, Naresh [2] ; Rangari, Vijaya K. [3] ; Rosa, Derval dos Santos [1]
Total Authors: 6
Affiliation:
[1] Univ Fed ABC UFABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas C, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil
[2] Tuskegee Univ, Integrat Biosci IBS Grad Sch PHD Program, Tuskegee, AL 26088 - USA
[3] Tuskegee Univ, Dept Mat Sci & Engn, Tuskegee, AL 26088 - USA
Total Affiliations: 3
Document type: Journal article
Source: MATERIALS TODAY COMMUNICATIONS; v. 22, MAR 2020.
Web of Science Citations: 0
Abstract

A combination of mechanical methods was developed to obtain a suspension of nanocellulose (NC) from Eucalyptus sawdust. In this two-step process, the ball milling (1-4 h) was followed by a high-intensity ultrasound (10- 30 min) irradiation. The prepared samples were characterized using Fourier-transform infrared spectroscopy, Raman, dynamic and static light scattering, Zeta potential, X-ray diffraction, X-ray photoelectron spectroscopy, Thermogravimetric analysis, Field-emission scanning electron microscopy, and Transmission electron microscopy. The crystallinity was calculated using different methods and compared. The mechanical grinding results in a random and irregular break of the fibers. In a combined method, the ultrasound waves generate more defibrillation and separation of the nanofibers and, consequently, the reduction of fiber diameters. The highintensity ultrasound promoted an increase in the homogeneity, crystallinity, and electrostatic and thermal stability of the NC suspension. The samples milled for 2 h and 20 min ultrasound irradiation presented the highefficiency in obtaining NC. (AU)

FAPESP's process: 18/25239-0 - Evaluation of dispersion of modified cellulose nanostructures in bionanocomposites
Grantee:Derval dos Santos Rosa
Support Opportunities: Scholarships abroad - Research
FAPESP's process: 18/11277-7 - PBAT films with cellulose nanostructures treated with essential oils encapsulated for active packaging
Grantee:Derval dos Santos Rosa
Support Opportunities: Regular Research Grants