Calabrese Carla, Parola Valeria La, Cappello Simone, Visco Annamaria, Scolaro Cristina, Liotta Leonarda Francesca
Istituto per lo Studio dei Materiali Nanostrutturati (ISMN)-CNR, Via Ugo La Malfa 153, I-90146 Palermo, Italy.
Institute for Biological Resources and Marine Biotechnologies (IRBIM), National Research Council (CNR), Spianata San Raineri 86, I-98122 Messina, Italy.
Nanomaterials (Basel). 2022 Jul 11;12(14):2371. doi: 10.3390/nano12142371.
Silica, titania, and mixed silica-titania powders have been used as supports for loading 5 wt% Cu, 5 wt% Ag, and 2.5 wt% Cu-2.5 wt% Ag with the aim of providing a series of nanomaterials with antifouling properties. All the solids were easily prepared by the wetness-impregnation method from commercially available chemical precursors. The resulting materials were characterized by several techniques such as X-ray diffraction analysis, X-ray photoelectron spectroscopy, N physisorption, and temperature-programmed reduction measurements. Four selected Cu and Ag SiO- and TiO-supported powders were tested as fillers for the preparation of marine antifouling coatings and complex viscosity measurements. Titania-based coatings showed better adhesion than silica-based coatings and the commercial topcoat. The addition of fillers enhances the resin viscosity, suggesting better workability of titania-based coatings than silica-based ones. The ecotoxicological performance of the powders was evaluated by Microtox luminescence tests, using the marine luminescent bacterium . Further investigations of the microbiological activity of such materials were carried out focusing on the bacterial growth of sp., sp., and sp. through measurements of optical density at 600 nm (OD).
二氧化硅、二氧化钛以及二氧化硅 - 二氧化钛混合粉末已被用作载体，用于负载5 wt% 的铜、5 wt% 的银以及2.5 wt% 的铜 - 2.5 wt% 的银，目的是提供一系列具有防污性能的纳米材料。所有固体均通过湿浸渍法，由市售化学前驱体制备而成。所得材料通过多种技术进行表征，如X射线衍射分析、X射线光电子能谱、N物理吸附以及程序升温还原测量。四种选定的负载于二氧化硅和二氧化钛上的铜和银粉末被测试用作制备海洋防污涂料的填料，并进行了复数粘度测量。基于二氧化钛的涂层比基于二氧化硅的涂层以及商业面漆表现出更好的附着力。填料的添加提高了树脂粘度，这表明基于二氧化钛的涂层比基于二氧化硅的涂层具有更好的可加工性。通过使用海洋发光细菌进行Microtox发光测试，评估了这些粉末的生态毒理学性能。针对此类材料的微生物活性，进一步开展了研究，重点关注通过测量600 nm处的光密度（OD）来研究 种、 种和 种细菌的生长情况。
