PARTICLEBOARD PRODUCED WITH CHROMATED COPPER ARSENATE- AND BORATE-TREATED CAIXETA WOOD: A TECHNICAL FEASIBILITY STUDY

Tiago H Almeida,Fabiane S Ferro,André L Christoforo,Francisco A R Lahr,Vinicius B De M Aquino

doi:10.1590/1809-4430-eng.agric.v41n5p567-575/2021

Abstract

Brazilian flora has more than 12 thousand tropical wood species, which can be the raw material for the construction industry. Chromated copper borate (CCB) and chromated copper arsenate (CCA) are wood preservative chemicals, which can generate toxic waste. Particleboards are usually produced from Pinus sp. and Eucalyptus sp. wood particles and a polymeric matrix (often formaldehyde-based), and they are used as raw material mainly for the furniture industry. This study aimed to investigate the technical feasibility of particleboard production using caixeta wood (Simarouba amara Aubl.) particles and bicomponent castor oil-based polyurethane resin for tropical wood waste management, as well as study the impact of CCA/CCB treatments on the performance of these panels according to NBR 14810 standards. Analysis of variance (ANOVA) tests was performed to compare ten physical and mechanical properties of the panels produced with CCA, CCB, and non-treated caixeta wood particles. The performance of caixeta wood panels was similar to the usually produced boards (using Pinus sp. and Eucalyptus sp. wood). Furthermore, preservative treatments did not change significantly the mechanical performance of panels. However, water absorption increased and thickness swelling decreased in CCA/CCB treated samples.

Highlights

Tropical Brazilian wood species are important raw materials in the building sector and are used as structural and non-structural wood components (Calil Junior et al, 2003; Ferreira et al, 2013; Lukacs et al, 2016; Fueyo et al, 2017)
Caixeta (Simarouba amara Aubl.) is a tropical Brazilian wood widely used because of its physical and mechanical properties, as well as its good appearance and coloration (Marques et al, 2006; Azevedo et al, 2010). This wood species is a raw material for timber structures and is usually classified into the C20 strength class of the Brazilian code (Gonçalez et al, 2014), with a characteristic value of 5-percentile compression strength parallel to grain of up to 20 MPa
This study aimed to investigate the technical feasibility of particleboards of chromated copper arsenate (CCA)- and Chromated copper borate (CCB)-treated caixeta wood and castor oil-based bicomponent polyurethane resin based on their physical and mechanical properties determined according to the NBR 14810 (ABNT 2018) code, besides comparing them (CCA, CCB, and untreated) to evaluate the impact of preservative treatment on panel performances

Summary

Introduction

Tropical Brazilian wood species are important raw materials in the building sector and are used as structural and non-structural wood components (doors, floors, and windows) (Calil Junior et al, 2003; Ferreira et al, 2013; Lukacs et al, 2016; Fueyo et al, 2017). Caixeta (Simarouba amara Aubl.) is a tropical Brazilian wood widely used because of its physical and mechanical properties, as well as its good appearance and coloration (Marques et al, 2006; Azevedo et al, 2010) This wood species is a raw material for timber structures and is usually classified into the C20 strength class of the Brazilian code (Gonçalez et al, 2014), with a characteristic value of 5-percentile compression strength parallel to grain of up to 20 MPa. The Brazilian furniture industry demands lots of caixeta wood, mainly for bespoke production, due to its coloration, low density (about 0.5 g/cm3), and low incidence of defects (Azevedo et al, 2010; Gonçalez et al, 2014)

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