The present study aims to investigate the influence of modified zinc oxide nanoparticles content on the physico-chemical properties of sawdust/epoxy composite specimens. The results show an improvement in the mechanical properties in terms of flexural strength, impact strength, and hardness with increasing the modified zinc oxide nanoparticles content up to 5%, while the physical properties such as water absorption and thickness swelling percentages are decreased directly with increasing the content of modified zinc oxide. In addition, the behavior of irradiated composite specimens containing 5% modified zinc oxide nanoparticles at different gamma-irradiation doses, 10, 30, and 50 kGy, has been studied. The results indicate that the irradiated composite specimens at 10 kGy have better physico-chemical properties as compared to the unirradiated specimens. Furthermore, the antimicrobial properties of composite specimens containing 5% modified zinc oxide at 0 kGy and 10 kGy against different plant pathogenic fungi and bacteria are also discussed. The results demonstrate that the growth activity of fungi and bacteria on the composite specimens are reduced to a great extent as compared to the control composite specimens (0% of zinc oxide nanoparticles). Thermal behavior and morphology of the prepared specimens are detected using thermogravimetric analysis and scanning electron microscopy technique.

中文翻译：

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改性纳米氧化锌对γ辐照木屑/环氧树脂复合材料理化和抗菌性能的影响

本研究旨在研究改性氧化锌纳米颗粒的含量对锯末/环氧树脂复合样品理化性质的影响。结果表明，随着改性氧化锌纳米粒子的含量增加至 5%，弯曲强度、冲击强度和硬度方面的机械性能有所改善，而吸水率和厚度溶胀率等物理性能则直接随着增加而降低。改性氧化锌的含量。此外，还研究了含有 5% 改性氧化锌纳米颗粒的复合样品在不同 γ 辐射剂量（10、30 和 50 kGy）下的行为。结果表明，与未辐照样品相比，10 kGy 辐照复合样品具有更好的理化性质。此外，还讨论了含有 0 kGy 和 10 kGy 的 5% 改性氧化锌的复合样品对不同植物病原真菌和细菌的抗菌性能。结果表明，与对照复合试样（0%氧化锌纳米颗粒）相比，复合试样上真菌和细菌的生长活性大大降低。使用热重分析和扫描电子显微镜技术检测制备的样品的热行为和形态。还讨论了含有 0 kGy 和 10 kGy 的 5% 改性氧化锌的复合样品对不同植物病原真菌和细菌的抗菌性能。结果表明，与对照复合试样（0%氧化锌纳米颗粒）相比，复合试样上真菌和细菌的生长活性大大降低。使用热重分析和扫描电子显微镜技术检测制备的样品的热行为和形态。还讨论了含有 0 kGy 和 10 kGy 的 5% 改性氧化锌的复合样品对不同植物病原真菌和细菌的抗菌性能。结果表明，与对照复合试样（0%氧化锌纳米颗粒）相比，复合试样上真菌和细菌的生长活性大大降低。使用热重分析和扫描电子显微镜技术检测制备的样品的热行为和形态。