bioresources. com
PEER-REVIEWED BRIEF COMMUNICATION
Investigation of Pore Size Distribution by Mercury Intrusion Porosimetry (MIP) Technique Applied on Different OSB Panels Fabiane Salles Ferro, a Felipe Nascimento Arroyo, a, * Edson Fernando Castanheira Rodrigues, a Iuri Fazolin Fraga, a João Paulo Boff Almeida, a Heloiza Candeia Ruthes, a Vinícius Borges de Moura Aquino, b Elen Aparecida Martines Morales, c Matheus Henrique Morato de Moraes, a Francisco Antônio Rocco Lahr, d and André Luis Christoforo a
Mercury intrusion porosimetry (MIP) is a technique used to characterize the pore size distribution and resin penetration in lignocellulosic materials, such as oriented strand board specimens (OSB), a multilayer panel utilized in structural applications. The method is based on the isostatic injection, under very high pressure, of a non-wetting fluid (mercury) into the porous material to determine parameters such as pore size distribution and percentage of porosity of the specimens. In this study, five different OSB were analyzed; they contained different wood species, resin type, and resin content. The panels manufactured with castor oil polyurethane resin showed porosity values in the range of 54.7 and 27.8%. This was a promising result compared with those obtained for panels made with phenolic resins, which are currently commercialized in Brazil.
Keywords: Mercury porosimetry; Oriented strand board; Castor oil polyurethane resin Contact information: a: Department of Civil Engineering, Federal University of São Carlos, São Carlos, Brazil; b: Department of Civil Engineering, Federal University of the South and Southeast of Pará, Santana do Araguaia, Brazil; c: Department of Materials Science and Engineering, Paulista State University, Itapeva, Brazil; d: Structural Engineering Department, University of São Paulo, São Carlos School of Engineering, São Carlos, Brazil. Corresponding author: lipe.arroyo@gmail.com INTRODUCTION The commercial exploitation of forest resources is growing globally as a result of the many applications of wood-based products (Santos et al. 2014). From an economic point of view, the activities of the lumber industry are of paramount importance. However, logging must be done in a controlled and sustainable manner, looking for ways that lead to more appropriate use of wood (González-Garcia et al. 2014). For example, wood can be utilized as a feedstock for the production of reconstituted wood panels (Mattos et al. 2008), including oriented strand board (OSB). The European standard EN 300 (2006) defines OSB as a multilayer panel, generally composed of three to five layers and made from strand of wood with a length greater than 50 mm and less than 2 mm thick, joined together by an adhesive. The wood strands in the external layers tend to align parallel to the length of the panel and in the internal layers may be randomly distributed or aligned generally perpendicular to the external layers (Souza 2012). OSB products are used for structural applications such as walls, ceilings, floors, beams, structural components, etc. , due to their mechanical strength and good dimensional stability, competing directly with the plywood market (Mendes 2011).
6661
Ferro et al . (20 21). “Strandboard Hg porosimetry,” B io R esources 16(4), 6661-6668.
Made with FlippingBook Online document maker