Nativa, Sinop, v. 6, n. 3, p. 321-325, mai./jun. 2018. Pesquisas Agrárias e Ambientais DOI: http://dx.doi.org/10.31413/nativa.v6i3.5418 http://www.ufmt.br/nativa ISSN: 2318-7670 Potential usage of the urban pruning residue for production of wood based panels Kelly Maria Zanuzzi PALHARINI 1 , José Benedito GUIMARÃES JUNIOR 2 , Douglas Lamounier FARIA 2 , Rafael Farinassi MENDES 2 , Thiago de Paula PROTÁSIO 3 , Lourival Marin MENDES 2 1 Curso de Engenharia Florestal, Universidade Federal de Goiás, Jataí, GO, Brasil. 2 Programa de Pós-Graduação em Engenharia de Biomateriais, Universidade Federal de Lavras, Lavras, MG, Brasil. 3 Curso de Engenharia Florestal, Universidade Federal Rural da Amazônia, Parauapebas, PA, Brasil. *E-mail: jbguimaraesjr@hotmail.com Recebido em julho/2017; Aceito em dezembro/2017. ABSTRACT: The purpose of this paper was to verify the utilization potential of urban pruning residue from the woods of Licania tomentosa, Schinus molle and Tibouchina granulosa for the production of wood based panels. The materials were collected from the city of Jataí, Goiás, Brazil. The basic density and chemical analyses of these materials were evaluated. Subsequently, 3 wood based panels of each studied species were produced. The nominal density of these panels was of 0.60g/cm³, dimensions of 25 x 25 x 1.5 cm. The adhesive used was urea formaldehyde at 8% based on its content of resinous solids. The pressing cycle used will be of nominal pressure of 4.0 MPa, temperature of 160 °C and time of 15 minutes. The absorption and thickness swelling properties after 2 and 24 hours of immersion in water, apparent density, perpendicular traction and flexural strength were evaluation. The design used was entirely randomized, using the Scott-Knott average test at 5% significance. It may be concluded that the materials used for production of the panels presented basic density and proper chemical analysis characteristics for the production of wood based panels. The residue which presented greatest potential of usage for production of wood based boards was the species Schinus molle. Palavras-chave: Schinus molle, Licania tomentosa, wood boards. Potencial de aproveitamento do resíduo da desrama urbana para produção de painéis aglomerados RESUMO: O objetivo deste trabalho foi verificar o potencial de utilização do resíduo da poda urbana das madeiras de Licania tomentosa, Schinus molle e Tibouchina granulosa para produção de painéis aglomerados. Os materiais foram coletados na cidade de Jataí, Goiás, Brasil. Avaliou-se a densidade básica e análise química destes materiais. Posteriormente foram produzidos 3 painéis aglomerados de cada espécie estudada. A densidade nominal destes painéis foi de 0,60g/cm³, dimensões de 25 x 25 x 1,5cm. O adesivo utilizado foi a uréia formaldeído a 8% com base no seu teor de sólidos resinosos. O ciclo de prensagem utilizado foi de pressão nominal de 4,0 MPa, temperatura de 160° C e tempo de 15 minutos. Avaliou-se as propriedades de absorção e inchamento em espessura após 2 e 24 horas de imersão em água, densidade aparente, tração perpendicular e flexão estática. O delineamento utilizado foi o inteiramente casualizado, com utilização do teste de médias de Scott-Knott a 5% de significância. Pode-se concluir que os materiais utilizados para produção dos painéis apresentaram características de densidade básica e análise química adequada para a produção de painéis aglomerados. O resíduo que apresentou maior potencial de ser utilizado para produção de chapas aglomeradas foi a espécie Schinus molle. Keywords: Schinus molle, Licania tomentosa, chapas de madeira. 1. INTRODUCTION Arborization in urbanized areas offers a number of advantages, such as noise reduction, microclimate modifications, visual field change, wildlife habitat improvement, as well as urban recreation and leisure (CEMIG, 2011). Most of the species used require periodic action of pruning its branches, especially to meet the characteristic requirements of the essences, on what concerns their development and longevity and ensure the safety in relation to electric power transmission cables (CHAHUD et al., 2012). The material resulting from urban pruning is considered a residue, and may become a risk for the environment and society. As a consequence, their allocation on landfills results in extra costs for the cities, compromises large areas for disposal, increases the risk of fire in these landfills and wasteland, leads to landscape deterioration, air and water pollution (ROCHA et al., 2015). Thus, one of the alternatives for the use of these residues is to use them as plywood panels. According to Iwakiri (2005), conventional wood based panels are a type of wood panel produced from particles of lignocellulosic materials; the adhesion between them occurs through a specific adhesive and under adequate conditions of pressure and temperature. This type of panel presents as one of its greatest advantages in relation to solid wood and even other panels, the possibility of using forest and agroindustrial residues as raw material for their confection (GUIMARÃES JUNIOR et