Abstract
The raw materials commonly used to produce pulp and paper in Brazil are woods from planted forests. Although with tremendous potential, the use of non-wood fibers is inexpressive. This study thus aimed to evaluate the use of sugarcane bagasse and bamboo to produce pulp and paper via physical, chemical and anatomical characterization, and to verify the influence of its properties on the process and the final product. Anatomical analysis of the fibers was performed (length and width from fibers and vessels, lumen width and cell wall thickness), as well as chemical component analysis (cellulose, hemicellulose, lignin, extractives and ash) and basic density of the materials. Moreover, felting rate, Runkel, Mulsteph and Boiler indexes, flexibility coefficient and wall fraction were generated. Results showed that both materials differed statistically in chemical properties, except for lignin content; density and anatomical properties, excluding vessel width and felting rate. Bamboo presented higher values cellulose (52.96%), minerals (2.34%), density (0.461 g/ cm³), wall fraction (67.84%) and Runkel (2.11), Mulsteph (0.90) and Boiler indices (0.81) values, whereas sugarcane bagasse presented higher hemicellulose (17.63%), extractives (12.81%) and flexibility coefficient (46.19%) values. Most properties were similar to those observed in raw materials commonly used for this purpose. Therefore, these two materials have potential for use in the pulp and paper industries.
Highlights
The raw materials commonly used to produce pulp and paper in Brazil are woods from planted forests
As principais matérias-primas dessa indústria são fibras madeireiras provenientes de florestas plantadas
O bagaço é um resíduo/ subproduto resultante do processamento industrial da canade-açúcar, gerado abundantemente
Summary
O setor de papel e celulose é um dos mais importantes e significativos ramos na indústria florestal brasileira, contribuindo com parte significativa dos plantios, balança comercial, investimentos e geração de emprego e renda. Dois tipos de fibras não madeireiras que podem ser utilizados no Brasil para produção de celulose e papel são o bagaço de cana e o bambu. Considerando a potencialidade do bagaço e do bambu para a produção de celulose e papel, existem poucos estudos que sugerem a utilização desses materiais no Brasil (Andrade et al, 2001; Azzini et al, 1996; Bilesky, 2014; Borges et al, 2018; Ciaramello, 1970). Este estudo teve como objetivo caracterizar a densidade básica e propriedades químicas e anatômicas do bagaço de cana e do bambu com a finalidade de subsidiar o uso desses materiais para a produção de celulose e papel, além de determinar os principais índices indicativos da qualidade dos papéis
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