Cellulose nanocrystals (CNCs) are promising particles in the production of wood fibre nanocomposites, due to their high stiffness, mechanical strength and low density. Wood fibres are the main source of cellulose, thus allowing the direct extraction of CNCs. As an attempt to improve the quality of wood fibre panels, this work performed topographical, tribological and mechanical characterization of medium density fibreboard (MDF) reinforced with CNCs at different concentrations, by substituting from 2 to 6% of the urea formaldehyde resin by acidic CNCs. The results showed no significant differences in the topographic characteristics and abrasion wear rates due to the incorporation of CNCs, although a tendency to obtain rougher panels was observed. The addition of CNCs at low proportions affected negatively the adhesion between the resin and the fibres, compromising the mechanical properties of the panels. On the other hand, some properties such as the modulus of rupture and hardn...

中文翻译：

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纳米纤维素增强木板的表面表征，机械强度和耐磨性

纤维素纳米晶体（CNC）由于其高刚度，机械强度和低密度，是生产木纤维纳米复合材料的有前途的颗粒。木纤维是纤维素的主要来源，因此可以直接提取CNC纤维。为了改善木纤维板的质量，这项工作通过用酸性CNC取代2至6％的脲醛树脂，对以不同浓度的CNC增强的中密度纤维板（MDF）进行了形貌，摩擦学和力学表征。 。结果表明，尽管加入了CNC，但在地形特征和磨损率方面没有显着差异，尽管观察到了获得更粗糙面板的趋势。低比例添加CNCs会对树脂和纤维之间的粘合性产生负面影响，从而损害了面板的机械性能。另一方面，一些性质，例如断裂模量和硬化...