Utilização de co-produtos da indústria de celulose e papel no desenvolvimento de novos materiais
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Data
2024-07-19
Autores
Marcelino, Paulo Roberto Correia
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Universidade Federal do Espírito Santo
Resumo
The pulp and paper industry, during its process, generates valuable products that have found applications in various industrial areas, with emphasis on cellulose microfibrils (MFC), cellulose nanocrystals (CNC), and lignin. Cellulose microfibrils are fibers with nanometric dimensions, while cellulose nanocrystals are crystalline particles, both obtained from the cellulose molecule. Lignin, on the other hand, is a macromolecule associated with cellulose and hemicelluloses in lignocellulosic compounds. Both materials have been extensively explored in materials engineering due to their mechanical, physical, chemical, and biological properties. The use of these products is not limited to the pulp and paper industry but extends to sectors such as the textile and automotive industries, packaging production, among others. The innovative application of these materials has led to remarkable advancements in various fields, from the development of lighter and more sustainable materials to the creation of innovative solutions in different segments. Investment in research and development in this field is a way to find increasingly innovative pathways for the use of these co-products, providing both economic and environmental benefits. In this context, this work produced epoxy matrix composites with 20% epoxidized soybean oil (ESO) reinforced with varied compositions of CNC and lignin. The produced composites were characterized through mechanical tests of tensile and flexural strength, thermal analysis (TG/DSC), X-ray diffraction (XRD), scanning electron microscopy, and tests for water absorption behavior, accelerated UV-C degradation, and FTIR. It is expected that these materials will influence various properties of the composites, but, above all, that the resulting materials will present characteristics that enable new applications.
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Celulose , Lignina , Engenharia de materiais