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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.)

Using Commercial Enzymes to Produce Cellulose Nanofibers from Soybean Straw

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Martelli-Tosi, Milena ; Torricillas, Marcela da Silva ; Martins, Maria Alice ; Garrido de Assis, Odilio Benedito ; Tapia-Blacido, Delia Rita
Total Authors: 5
Document type: Journal article
Source: Journal of Nanomaterials; 2016.
Web of Science Citations: 15

This study used commercial enzymes to isolate cellulose nanofibrils (CN) and produce sugars from chemically pretreated soybean straw (SS) (stem, leaves, and pods) by alkali (NaOH 5 or 17.5% v/v at 90 degrees C for 1 h or at 30 degrees C for 15 h) and bleaching (NaClO2 3.3% or H2O2 4%) pretreatments. Depending on the pretreatment applied to the soybean straw, the yield of CN varied from 6.3 to 7.5 g of CN/100 g of SS regardless of the concentration of the alkaline solution (5 or 17.5%). The CN had diameter of 15 nm, measured over 300 nm in length, and had high electrical stability (zeta potentials ranged from -20.8 to -24.5). Given the XRD patterns, the crystallinity index (CrI) of CN ranged from 45 to 68%, depending on the chemical pretreatment the startingmaterial was submitted to. CN obtained from SS treated with NaOH 17.5% and H2O2 (CrI = 45%) displayed better thermal stability probably because a lignin-cellulose complex emerged. The soluble fraction obtained in the first step of CN production contained a large amount of reducing sugars (11.2 to 30.4 g/100 g of SS). SS seems to be a new promising industrial source to produce CN via enzymatic-mechanical treatment, leading to large amounts of reducing sugars for use in bioenergy production. (AU)

FAPESP's process: 16/16222-0 - Using commercial enzymes to produce cellulose nanofibers from soybean straw
Grantee:Milena Martelli Tosi
Support Opportunities: Regular Research Grants - Publications - Scientific article
FAPESP's process: 12/22154-7 - Isolation of cellulose nanofibers from soybean by-products and their applicability as reinforcement material in biodegradable films
Grantee:Milena Martelli Tosi
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 14/02432-8 - Isolation of cellulose nanofibers from soybean by-products using chemical, enzymatic and physical treatments
Grantee:Marcela da Silva Torricillas
Support Opportunities: Scholarships in Brazil - Scientific Initiation