Obtaining cellulose nanowhiskers from waste wood by enzymatic methods

• Grant number: 16/12700-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): September 01, 2016
• Effective date (End): August 31, 2018
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Derval dos Santos Rosa
• Grantee: Clara Rodrigues Bauli
• Host Institution: Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil

Abstract

Nanocelulose and its application in the production of biodegradable materials as a reinforcing element have been targets of recent studies. Its extraction from lignocellulosic fibers is convenient not only for the abundance of the material, but also because these can be obtained from waste, such as wood reforestation discarded industry. This use can prevent generation of waste and environmental impact, since the reuse of such material prevents the release of carbon into the atmosphere, once the disposal of these residues would burn as biomass, which releases carbon dioxide into the atmosphere. This project proposes obtaining these nanocrystals (cellulose nanowhiskers) by mercerization, bleaching and finally the action of the enzyme 1,4-ß-D-endoglucanase (stage chemically less aggressive to the environment) instead of acid hydrolysis. It intends to use soft wood (pinus) sawdust as industrial waste which will be tested for different times of exposure in the enzymatic solution. Posteriorly, the residues will be characterized by Fourier transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Thermogravimetric analysis (TGA). The size of the particles will be measured by light scattering techniques. The Cellulose nanowhiskers will be used on the UFABC's research group projects, seeking their incorporation into biodegradable polymeric matrices, which allows the production of completely biodegradable nanocomposites. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BAULI, CLARA R.; ROCHA, DANIEL B.; DE OLIVEIRA, SUELI A.; ROSA, DERVAL S.. Cellulose nanostructures from wood waste with low input consumption. JOURNAL OF CLEANER PRODUCTION, v. 211, p. 408-416, FEB 20 2019. (16/12700-5)

BAULI, CLARA R.; ROCHA, DANIEL B.; ROSA, DERVAL DOS SANTOS. Composite films of ecofriendly lignocellulosic nanostructures in biodegradable polymeric matrix. SN APPLIED SCIENCES, v. 1, n. 7, JUL 2019. (18/11277-7, 16/12700-5)