Title:
A Multistep Mild Process for Preparation of Nanocellulose from Orange Bagasse
Author(s):
Mariño, M., Camila C. R., Tasic, L.
Document(s):
Paper
Abstract:
In this study, biomasses with low lignin contents, named industrial orange bagasse (IOB-Citrosuco, Matão, SP) and orange bagasse in natura (OBN), were investigated as starting materials for the production of nanocellulose under mild conditions. These last account for both acid hydrolysis (at 100 °C and pH 2.0) and alkaline hydrolysis (with NaOH 1.6-4.0%, m/v), performed at 120 ºC, followed by bleaching (with NaClO2 1-3% m/v) at 70 ºC. After chemical and mechanical treatments, it was possible to obtain a cellulosic material with high cellulose content and around 60% of crystallinity. Emission scanning electron microscopy technique (ESEM) results showed that the nanofibers produced from IOB presented a mean diameter of 20.5 nm ± 7.20; while 18.4 nm ± 5.88 were found for nanofibers from OBN; a network distribution of mainly D-glucose building blocks was characteristic of these biobased materials. The Crystallinity Index (CI), which is an important parameter for assessing the quality of the biomaterial, was determined using X-ray diffraction (XRD) and solid-state nuclear magnetic resonance (CP-MAS NMR). The multi-step process reported here for nanocellulose extraction is a green alternative for the treatment of orange waste with numerous potential applications such as the production of high performance nanocomposites.
Keywords:
cellulose, agroindustrial residues, hydrolysis, biobased products, green chemistry
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Production and application of biobased chemicals
Event:
24th European Biomass Conference and Exhibition
Session:
3BO.11.2
Pages:
1025 - 1032
ISBN:
978-88-89407-165
Paper DOI:
10.5071/24thEUBCE2016-3BO.11.2
Price:
FREE
