The industrial development of high-value bamboo fiber-based composites is a crucial direction for advancing the bamboo industry in Africa, and investigating the actual outdoor aging of materials could provide more accurate references for material design and applications. This study explored the adaptability of highland bamboo from Ethiopia in industrial moso bamboo bundle laminated veneer lumber (MBLVL) to develop unique the HBLVL products specific to Africa. The durability of samples was studied for one year in an outdoor environment. The results revealed that the vascular bundle volume fraction, flexural strength, and flexural modulus of highland bamboo (57.25 %, 193.89 MPa, and 18.47 GPa) were superior to those of moso bamboo (34.42 %, 140.81 MPa, and 10.25 GPa), and the HBLVL (168.98 MPa and 20.51 GPa) exhibited a higher flexural strength and flexural modulus than the MBLVL (117.60 MPa and 10.74 GPa). Although outdoor aging produced surface cracks, darker colors, and lignin degradation, the fundamental physical and mechanical properties of both the HBLVL and the MBLVL remained stable. This study's findings provide a theoretical basis for the efficient utilization of African bamboo resources and for the industrial production of the HBLVL, as well as experimental data for future outdoor aging research.

中文翻译：

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高原竹束单板层积材（HBLVL）的工业适应性和户外耐久性


高价值竹纤维基复合材料的产业发展是推进非洲竹产业发展的重要方向，研究材料的实际户外老化情况可以为材料设计和应用提供更准确的参考。本研究探讨了埃塞俄比亚高原竹在工业毛竹竹束层积材（MBLVL）中的适应性，以开发针对非洲的独特 HBLVL 产品。在室外环境中对样品的耐久性进行了一年的研究。结果表明，高原竹的维管束体积分数、弯曲强度和弯曲模量（57.25%、193.89MPa和18.47GPa）优于毛竹（34.42%、140.81MPa和10.25GPa），并且HBLVL（168.98MPa和20.51GPa）表现出比MBLVL（117.60MPa和10.74GPa）更高的弯曲强度和弯曲模量。尽管户外老化产生表面裂纹、颜色变深和木质素降解，但 HBLVL 和 MBLVL 的基本物理和机械性能保持稳定。该研究结果为非洲竹子资源的高效利用和HBLVL的工业化生产提供了理论依据，也为未来的户外老化研究提供了实验数据。