The main objective of this work was to further analyze the optimization of the production factors of Arundo donax L. fiberboards obtained without adhesives. The production of boards derived from Arundo donax L. without added adhesives and with high mechanical performance has already been demonstrated. This present study explored a modification in the production process through a final curing thermal treatment (final heat treatment, FHT). Since pressing time is an influential factor in the production cost, it is expected that curing allows a reduction of this time. This study compared the results obtained by three panel-production alternatives: long pressing time (tp) without curing and long and short tp with FHT. Of the two factors analyzed, pressing pressure (Pp) was the most important production factor in both the modulus of elasticity (MOE) and modulus of rupture (MOR), while curing was the most important factor for the internal bond (IB). The study shows that a FHT facilitates the distribution of lignin and a possible improvement in the quantity and quality of bonds between lignin and cellulosic fibers. As a consequence, it improves the IB, produces boards with more homogeneous physical and mechanical properties and thereby makes them more hydrophobic. The curing thermal treatment allows high performance panels to be obtained in a manner which is more ecological, quicker, and cheaper.

中文翻译：

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不添加粘合剂的芦竹纤维制得的板材生产因素的优化

这项工作的主要目的是进一步分析无粘合剂获得的芦竹纤维板的生产因素的优化。从 Arundo donax L. 生产的板材无需添加粘合剂且具有高机械性能，这已经得到证实。本研究探索了通过最终固化热处理（最终热处理，FHT）对生产过程的改进。由于压制时间是生产成本的一个影响因素，因此预计固化可以缩短该时间。本研究比较了三种面板生产替代方案获得的结果：长压制时间 (tp) 不固化和长和短 tp 使用 FHT。在分析的两个因素中，压制压力 (Pp) 是弹性模量 (MOE) 和断裂模量 (MOR) 中最重要的生产因素，而固化是内部粘合 (IB) 的最重要因素。研究表明，FHT 促进了木质素的分布，并可能改善木质素和纤维素纤维之间的结合数量和质量。因此，它提高了 IB，生产出具有更均匀物理和机械性能的板，从而使它们更疏水。固化热处理允许以更生态、更快和更便宜的方式获得高性能面板。研究表明，FHT 促进了木质素的分布，并可能改善木质素和纤维素纤维之间的结合数量和质量。因此，它提高了 IB，生产出具有更均匀物理和机械性能的板，从而使它们更疏水。固化热处理允许以更生态、更快和更便宜的方式获得高性能面板。研究表明，FHT 促进了木质素的分布，并可能改善木质素和纤维素纤维之间的结合数量和质量。因此，它提高了 IB，生产出具有更均匀物理和机械性能的板，从而使它们更疏水。固化热处理允许以更生态、更快和更便宜的方式获得高性能面板。