Physical performance of particleboards using Castor oil-based adhesive

ABSTRACT Reconstituted wood panels are widely used in various branches of the wood industry, such as in the furniture sectors and various segments of urban and rural construction. In Brazil, agricultural and forestry residues are abundantly generated, making feasible the study, development and application of alternative and sustainable materials, produced from the use of these wastes. The aim of this study was to produce high-density homogenous panels with wood residues of Pinus elliottii and oat hulls (Avena sativa), pressed with two types of adhesive, castor oil-based polyurethane and melamine formaldehyde, and to evaluate the physical performance of these panels. The physical performance of the panels was evaluated based on the ABNT NBR 14810: 2006, ANSI A208.1: 1999 and BS EN 312: 2003 standards. Analysis of variance (ANOVA) was performed to test the influence of the factors percentage of oat hull, percentage of adhesive and type of adhesive, and the interactions between these factors on the physical properties of the panels. The results indicated physical properties, in some treatments superior to the requirements stipulated by the consulted standards. It was concluded that the panels produced with the castor oil-based polyurethane adhesive showed better physical performance when compared with the panels produced with the melamine formaldehyde adhesive.

摘要
重组木板材（reconstituted wood panels）广泛应用于木材工业的诸多分支领域，例如家具制造业以及城乡建设的各类细分场景。在巴西，农林业残余物产量充沛，使得利用这类废弃物制备替代型可持续材料的研究、开发与应用具备可行性。本研究旨在利用湿地松（Pinus elliottii）与燕麦壳（Avena sativa）的木材残余物，辅以两种胶粘剂——蓖麻油基聚氨酯（castor oil-based polyurethane）与三聚氰胺甲醛（melamine formaldehyde）——压制成高密度均质板材，并对这类板材的物理性能进行评估。
本研究依据ABNT NBR 14810:2006、ANSI A208.1:1999以及BS EN 312:2003三项标准对板材的物理性能开展评估。通过方差分析（Analysis of Variance, ANOVA）检验燕麦壳占比、胶粘剂占比、胶粘剂类型这三个因素及其交互作用对板材物理性能的影响。研究结果显示，部分处理组的板材物理性能优于所参考标准规定的要求。本研究最终得出结论：相较于采用三聚氰胺甲醛胶粘剂制备的板材，使用蓖麻油基聚氨酯胶粘剂制备的板材具备更优异的物理性能。