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首页> 外文期刊>RSC Advances >Colloidal silver nanoparticles: an effective nano-filler material to prevent fungal proliferation in bamboo
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Colloidal silver nanoparticles: an effective nano-filler material to prevent fungal proliferation in bamboo

机译：胶体银纳米颗粒：一种有效的纳米填料，以防止竹子真菌增殖

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摘要

Silver nanoparticles (Ag-NPs) have attracted attention as a promising nano-filler material for reinforcement and anti-bacterial effect in polymers and composites. In this work bamboo samples, Dendrocalamus Giganteus Munro, were impregnated using a colloidal solution of homemade Ag-NPs with the goal of improving its resistance to attacks by fungi. X-ray microtomography (mu CT) was performed to investigate the 3D distribution of Ag-NPs within the biological matrix. 3D image reconstruction showed silver clusters distributed within the parenchymatic tissue. Quantitative information of the Ag-NPs agglomerate population was computed. Ag-NPs were characterized by UV-VIS, SERS, ICP-MS, TSEM, DLS and zeta potential analysis. The antimicrobial activity of homemade and commercial citrate-capped silver nanoparticles was evaluated against the Aspergillus niger fungus. Homemade nanoparticles (NP-01), presenting the smallest diameter (14.3 +/- 3.6 nm), and the highest particle concentration (1.25 x 10(11) particles per mL) were able to inhibit 53% of Aspergillus niger growth in a concentration of 2.00 mg L-1. Both engineered biocomposite material and untreated specimens were exposed to air and humidity. After five months the treated samples were free of fungal colonies, while colonization by the fungal hyphae was present on untreated bamboo specimens.
机译：银纳米颗粒（AG-NPS）被吸引着注意力，用于加强和复合材料中的增强和抗细菌作用的纳米填充材料。在这项工作中，Dendrocalamus Giganteus Munro竹样品，使用自制AG-NPS的胶体解决方案浸渍，其目的是通过真菌的抗攻击来提高其抗攻击。进行X射线显微镜图（MU CT）以研究生物基质内Ag-NP的3D分布。 3D图像重建显示在纯组织内分布的银簇。计算了AG-NPS凝聚群的定量信息。通过UV-Vis，SERS，ICP-MS，TSEM，DLS和Zeta电位分析表征Ag-NPS。对曲霉尼日尔真菌评价自制和商业柠檬酸盐覆盖的银纳米粒子的抗微生物活性。呈现最小直径（14.3 +/- 3.6nm）的自制纳米颗粒（NP-01）和最高的颗粒浓度（1.25×10（11）颗粒颗粒）能够抑制浓度的53％的曲霉生长2.00 mg L-1。将工程化的生物复合材料和未处理的样品均暴露于空气和湿度。五个月后，处理过的样品不含真菌菌落，而真菌菌丝的定子存在于未处理的竹子标本上。

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  • 来源
    《RSC Advances》 |2016年第100期|共12页
  • 作者

    Pandoli O.; Martins R. D. S.; Romani E. C.; Paciornik S.; Mauricio M. H. D. P.; Alves H. D. L.; Pereira-Meirelles F. V.; Luz E. L.; Koller S. M. L.; Valiente H.; Ghavami K.;

  • 作者单位

    Pontificia Univ Catolica Rio de Janeiro Dept Chem Rio de Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Chem Rio de Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Phys Rio de Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Chem &

    Mat Engn Rio de Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Chem &

    Mat Engn Rio de Janeiro Brazil;

    Univ Estado Rio De Janeiro Appl Phys &

    Thermodynam Dept Rio De Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Chem Rio de Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Chem Rio de Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Chem Rio de Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Chem &

    Mat Engn Rio de Janeiro Brazil;

    Pontificia Univ Catolica Rio de Janeiro Dept Civil Engn Rio de Janeiro Brazil;

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