In this work, the feasibility of producing low-cost, recyclable and biodegradable binderless all-cellulose fibreboards was demonstrated through the successful manufacturing of self-binding composites based on recycled paper and kraft fibres. These all-cellulose composites were made by a simple and environmentally friendly solvent-free mechanical fibrillation method using water as a processing aid. Kraft fibres and recycled paper pulp were mixed in a 30/70 w/w ratio and refined simultaneously in a Valley beater for different periods of time. The mechanical properties of the composites, consisting of a ‘matrix’ of recycled paper reinforced with kraft fibres, were highly dependent on the level of fibrillation of the kraft fibres. Optimal levels of fibrillation resulted in a good balance of self-binding properties and reinforcing efficiency. The hot-pressed all-cellulose panels exhibited a flexural strength of 75 MPa and a modulus of 5·9 GPa, which are impressive values compared with those of conventional fibreboard materials. In addition, these panels showed better water resistance than some existing wood panel products. These binder-free all-cellulose composites have potential as cost-effective sustainable alternatives to existing panel board products, as they are entirely made from renewable and recycled materials, which at the end of life can potentially be recycled or composted, making them perfectly fit for a circular economy.

中文翻译：

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将低成本的再生纸转变为高价值的无粘合剂全纤维素面板产品

在这项工作中，通过成功制造基于再生纸和牛皮纸纤维的自粘合复合材料，证明了生产低成本，可回收和可生物降解的无粘合剂全纤维素纤维板的可行性。这些全纤维素复合材料是通过使用水作为加工助剂的简单且环保的无溶剂机械原纤化方法制成的。牛皮纸纤维和再生纸浆以30/70 w / w的比例混合，并在Valley搅拌器中同时精炼不同的时间。由牛皮纸纤维增强的再生纸“基体”组成的复合材料的机械性能高度依赖于牛皮纸纤维的原纤化程度。最佳的原纤化水平导致了自结合性能和增强效率之间的良好平衡。热压全纤维素板的抗弯强度为75 MPa，模量为5·9 GPa，与常规纤维板材料相比，具有令人印象深刻的价值。此外，这些面板比某些现有的木板产品显示出更好的耐水性。这些无粘合剂的全纤维素复合材料具有完全替代可再生材料的潜力，可作为现有面板产品的经济有效的可持续替代品，这些材料在使用寿命结束时可以进行回收或堆肥，非常适合循环经济。这些面板比某些现有的木板产品显示出更好的耐水性。这些无粘合剂的全纤维素复合材料具有完全替代可再生和可回收材料的潜力，可作为现有面板产品的经济有效的可持续替代品，这些材料在使用寿命结束时可以被回收或堆肥，使其非常适合循环经济。这些面板比某些现有的木板产品显示出更好的耐水性。这些无粘合剂的全纤维素复合材料具有完全替代可再生材料的潜力，可作为现有面板产品的经济有效的可持续替代品，这些材料在使用寿命结束时可以进行回收或堆肥，非常适合循环经济。