Does the Addition of Cotton Wastes Affect the Properties of Particleboards?

ABSTRACT A wide range of materials for the development of new products can be obtained from natural resources. Good examples of these materials are lignocellulosic wastes, which are a good alternative for the production of particleboards. This study aimed to evaluate the feasibility of using cotton wastes in association to eucalyptus particles in the production of particleboards. Cotton waste proportions used were 0, 10, 20 and 30%. Urea formaldehyde (UF) adhesive was applied at 12%, based on dry the weight of particles. Physical and mechanical tests were performed in order to evaluate panels. Water Absorption (2 and 24 h) and Internal Bond (IB) showed not significant effect with increased percentage of cotton waste. Thickness Swelling (2 and 24 h) of particleboards increased with increased percentage of waste material. The Modulus of Elasticity for cotton waste particleboards ranged from 726.47 ± 99.98 to 205.12 ± 66.24 MPa, while the Modulus of Rupture ranged from 8.63 ± 1.39 to 3.87 ± 0.75 MPa. According to results, cotton wastes could be added to particleboards up to the percentage of 9%, being indicated for the manufacture of some types of furniture such as doors and sides.

摘要 从自然资源中可获取用于新产品开发的多种材料，其中木质纤维素废弃物（lignocellulosic wastes）便是典型代表，其是生产刨花板（particleboards）的优质替代原料。本研究旨在评估将棉废料与桉木颗粒复配用于刨花板生产的可行性。实验设置的棉废料添加比例分别为0%、10%、20%和30%。以颗粒干重为基准，脲醛树脂（Urea Formaldehyde, UF）胶粘剂的施胶量为12%。为评估板材性能，对其开展了物理力学性能测试：2小时与24小时吸水率以及内结合强度（Internal Bond, IB）的测试结果显示，棉废料添加比例的提升对上述两项指标无显著影响；而刨花板的2小时与24小时厚度膨胀率则随废料添加比例的升高而增大。棉废料基刨花板的弹性模量（Modulus of Elasticity）范围为726.47±99.98 MPa至205.12±66.24 MPa，断裂模量（Modulus of Rupture）范围为8.63±1.39 MPa至3.87±0.75 MPa。综合实验结果可知，棉废料在刨花板中的添加比例最高可达9%，该材料适用于制造门板、侧板等多款家具产品。