Potencialidades de duas espécies de bambu (Bambusa vulgaris e Dendrocalamus giganteus) para produção de pisos engenheirados do tipo multilaminado

• Ano de defesa: 2024
• Autor(a) principal: Nicacio, Marcos Alves
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Doutorado em Ciências Florestais; Centro de Ciências Agrárias e Engenharias; UFES; Programa de Pós-Graduação em Ciências Florestais
• Palavras-chave em Português: Tratamentos químico e térmico; Caracterização física; Colorimetria; Ensaio biológico; Ensaios de simulação em pisos; Bambu; Bambusa vulgaris; Dendrocalamus giganteus; Chemical and thermal treatments; Physical characterization; Colorimetry; Biological test; Simulation tests on floors; Recursos Florestais e Engenharia Florestal
• Link de acesso: http://repositorio.ufes.br/handle/10/18180

Bamboo, used for years in Asia for various applications, is underutilized and undervalued in Brazil, often associated with temporary constructions and poverty. This has deterred financial investments and the interest of the scientific community in exploring its potential in various projects. This study aimed to evaluate the potential of two bamboo species, Bambusa vulgaris Schrad. ex J.C. Wendl. and Dendrocalamus giganteus Munro, for engineered flooring production. Thermal treatments were conducted at temperatures of 140°C, 170°C, and 200°C, along with chemical treatments using boric acid, sodium borate, and sodium octaborate. Colorimetric analyses were performed using the Commission Internacionale L'Eclairage - CIE L* a* b* system (L* - light-dark, a* - red green, and b* - yellow-blue), along with tests involving drywood and subterranean termites, and simulations of flooring use, including abrasion, rolling load, and impact tests. Thermal treatments resulted in significant changes in the properties of B. vulgaris and D. giganteus bamboos, including a reduction in mass loss and increases in ash and total extractive contents, particularly at 200°C. Additionally, there was progressive darkening of the material and alterations in color coordinates (L*, a*, b*), with more pronounced effects at higher temperatures. However, thermal treatments proved less effective that those chemical treatments against termites. In flooring simulation tests, thermal treatments yielded lower values overall, except in abrasion tests where most of them performed comparably to the durability standard of tropical hardwood floors. In conclusion, the engineered bamboo flooring tested presents viable alternatives for residential use, except for the 200°C thermal treatment