Although the metallization of wood and bamboo has been successfully achieved, challenges such as low efficiency, high costs, and environmental pollution caused by liquid chemical wastes have impeded its widespread adoption in manufacturing. This study presents a novel approach to fabricating metal-reinforced bamboo composite (MRBC) with exceptional performances, utilizing bamboo residues and nano-CuO without use of adhesives. The impact of raw material characteristics, including moisture content of bamboo powder and the amount of nano-CuO additive, on functional properties such as water resistance, flame retardancy and smoke suppression of MRBC was investigated. Also, the forming mechanism of MRBC was elucidated through examination of its microstructure, chemical composition, and thermal stability. Results indicated that the MRBC containing 20 wt% nano-CuO exhibited a high modulus of rupture (MOR) of 54 MPa, an impressive modulus of elasticity (MOE) of 9.3 GPa, a notable surface hardness of 44.4 kgf/mm, and low 24 h water absorption-thickness swelling of 6.5 %, all significantly surpassing those observed in conventional panels. The MRBC exhibited a tightly wrapped, adhered, and cross-linked process under high temperature and pressure conditions, facilitated by multiple synergistic effects such as lignin melting, hydrogen bond networking, physical structure entanglement, and material redox reaction, which contributed to a dense intertwined and consolidated structure. The MRBC demonstrated exceptional structural integrity throughout the combustion process, effectively mitigating potential damage caused by structural collapse due to the incorporation of nano-CuO, which also successfully suppressed smoke and toxic CO gas emissions during combustion. The MRBC showcased advantages of environmental friendliness, water resistance, high strength, flame retardancy and smoke suppression. These attributes position it as an optimal substitute for conventional panels and make it suitable for replacing metals in specific applications. Thus, it demonstrates significant market potential and promising prospects for sustainable development.

中文翻译：

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具有高自粘性能的绿色可持续金属增强竹复合材料


虽然已经成功地实现了木材和竹子的金属化，但液体化学废物造成的效率低、成本高和环境污染等挑战阻碍了其在制造业中的广泛应用。本研究提出了一种制造具有卓越性能的金属增强竹复合材料 （MRBC） 的新方法，利用竹渣和纳米 CuO，无需使用粘合剂。研究了竹粉含水率和纳米 CuO 添加剂用量等原材料特性对 MRBC 的耐水性、阻燃性和抑烟性等功能性能的影响。此外，通过检查其微观结构、化学成分和热稳定性，阐明了 MRBC 的形成机制。结果表明，含有 20 wt% 纳米 CuO 的 MRBC 表现出 54 MPa 的高断裂模量 （MOR），令人印象深刻的 9.3 GPa 弹性模量 （MOE），44.4 kgf/mm 的显着表面硬度，以及 6.5% 的低 24 h 吸水厚度膨胀，均显著优于传统面板。MRBC 在高温高压条件下表现出紧密包裹、粘附和交联的过程，在木质素熔化、氢键网络、物理结构缠结和材料氧化还原反应等多种协同效应的推动下，有助于形成致密的交织和固结结构。MRBC 在整个燃烧过程中表现出卓越的结构完整性，由于纳米 CuO 的加入，有效地减轻了结构坍塌造成的潜在损害，这也成功地抑制了燃烧过程中的烟雾和有毒 CO 气体排放。 MRBC 展示了环保、防水、高强度、阻燃和抑烟等优点。这些特性使其成为传统面板的最佳替代品，并使其适合在特定应用中替代金属。因此，它展示了巨大的市场潜力和可持续发展的光明前景。