This work investigates the feasibility of producing low density particleboards using an adhesive system based on sour cassava starch, taking advantage of its adhesive and self-expansion properties. Relevant properties of the produced particleboards were evaluated according to European Standards including: density, internal bond, moisture content and thickness swelling. Low density particleboards were produced with densities between 207 kg/m(3) and 407 kg/m(3). The best performance corresponded to particleboard with a density of 318 kg/m(3), an internal bond strength of 0.67 N/mm(2), and a thickness swelling of 8.7%. These values meet the standard requirements of general purpose lightweight boards for use in dry conditions. Heat post-treatment (24 h at 80 degrees C) led to lower internal bond strength, due to retrogradation (recrystallization of amylose and amylopectin chains upon cooling) causing higher rigidity of the starch binder. However, it showed to have a significant effect on decreasing the thickness swelling.
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机译：这项工作研究了利用基于酸性木薯淀粉的粘合剂系统生产低密度刨花板的可行性，并利用了其粘合性和自膨胀特性。所生产的刨花板的相关性能根据欧洲标准进行了评估，包括：密度，内部结合力，水分含量和厚度膨胀。低密度刨花板的生产密度在207 kg / m（3）和407 kg / m（3）之间。最佳性能对应于密度为318 kg / m（3），内部粘结强度为0.67 N / mm（2）和厚度膨胀为8.7％的刨花板。这些值满足在干燥条件下使用的通用轻质板的标准要求。加热后处理（在80摄氏度下24小时）由于凝结（冷却后直链淀粉和支链淀粉链的重结晶）导致淀粉结合剂具有较高的刚性，从而导致较低的内部结合强度。然而，它显示出对减小厚度溶胀具有显著作用。
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