Scholarship 24/06477-8 - Biorrefinarias - BV FAPESP
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Production and characterization of Kraft lignin nanoparticles from non-commercial Corymbia spp. and Eucalyptus spp. wood

Grant number: 24/06477-8
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Start date until: June 01, 2024
End date until: December 31, 2024
Field of knowledge:Agronomical Sciences - Forestry Resources and Forestry Engineering - Technology and Use of Forest Products
Principal Investigator:Humberto de Jesus Eufrade Junior
Grantee:Felipe Zanon Lima
Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

Forest biorefineries have been gaining prominence in recent years, especially in the valorization of residues from the pulp and paper industry. Several studies on the residual black liquor from the kraft pulp process have been conducted with the aim of providing alternative uses beyond combustion. Examples include isolation and production of kraft lignin with applications in the pharmaceutical and cosmetic industry, adhesives, polymers, among others. Faced with the challenge of utilizing kraft lignin due to the complexity of the molecule, an alternative is to break it down into smaller nanoscale parts, referred to as nanolignin, to enhance its physicochemical characteristics. This project aims to perform technological characterization of kraft lignin and nanolignin from non-commercial species of Eucalyptus and Corymbia. Lignin will be obtained through conventional kraft cooking of woods and acid precipitation (pH=2) of the black liquor, characterized by hydroxyl index and mineral content. For the transformation of kraft lignin into nanolignin, it will undergo up to ten passes through a supermasscolloider mill for nanoparticle production. The obtained nanolignin will be morphologically characterized using high-resolution electron microscopy and chemically analyzed through energy-dispersive X-ray spectroscopy. Therefore, we hope to contribute to the characterization of the chemical composition of lignin and its nanoparticles, aiming to explore their potential for different technological applications and in the development of new bioproducts derived from trees.

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