Verma Jaya, Geng Yanquan, Wang Jiqiang, Goel Saurav
School of Engineering, London South Bank University, London, SE1 0 AA, UK.
Center for Precision Engineering, Harbin Institute of Technology, Harbin, 150001, Heilongjiang, China.
Sci Rep. 2023 Jul 29;13(1):12321. doi: 10.1038/s41598-023-39423-9.
We report the development of a coating system relying on the incorporation of SiO@ZnO core-shell nanospheres in polyurethane media as a novel approach to achieve longevity and sustainability in marine transport. This polymeric coating showed significant improvement in surface abrasion resistance, the transition from a hydrophilic state to a hydrophobic state (~ 125.2° ± 2°), improved antifungal, antibacterial and antialgae effects which make the proposed coating ideal to protect steel surfaces against biofouling. To substantiate our claims, we performed X-ray diffraction, Transmission electron microscopy, Fourier transform infrared spectroscopy, scanning acoustic microscopy, Thermogravimetric analysis (TGA), contact angle measurements, antimicrobial (antialgal, antibacterial, antifungal) tests and Taber abrasion tests (ASTM D1044 and D4060) to highlight the mechanical and biological functionality as well as the bonding configuration of this coating. The wear analysis of the Taber abraded coating using SEM and optical microscopy showed significant improvement in the adhesion and shear resistance achieved by the SiO@ZnO core-shell nanospheres incorporated PU coating which was a contrasting feature compared to using PU alone. The overall investigations we performed led us to find out that the addition of 4% (wt.) SiO@ZnO core-shell nanoparticles to the PU media deposited on the low carbon steel surface demonstrated remarkable antimicrobial performance with almost no bacterial growth, significant reductions in growth for algae to about 90% and fungus to about 95%.
我们报道了一种涂层系统的研发情况，该系统依赖于将SiO@ZnO核壳纳米球掺入聚氨酯介质中，作为一种在海上运输中实现耐久性和可持续性的新方法。这种聚合物涂层在表面耐磨性方面有显著改善，从亲水状态转变为疏水状态（约125.2°±2°），具有更好的抗真菌、抗菌和抗藻效果，这使得该涂层非常适合保护钢表面免受生物污损。为了证实我们的说法，我们进行了X射线衍射、透射电子显微镜、傅里叶变换红外光谱、扫描声学显微镜、热重分析（TGA）、接触角测量、抗菌（抗藻、抗菌、抗真菌）测试和泰伯磨耗试验（ASTM D1044和D4060），以突出该涂层的机械和生物功能以及键合结构。使用扫描电子显微镜和光学显微镜对泰伯磨耗涂层进行的磨损分析表明，掺入SiO@ZnO核壳纳米球的聚氨酯涂层在附着力和抗剪切性方面有显著改善，这与单独使用聚氨酯形成了鲜明对比。我们进行的全面研究使我们发现，在低碳钢表面沉积的聚氨酯介质中添加4%（重量）的SiO@ZnO核壳纳米颗粒具有显著的抗菌性能，几乎没有细菌生长，藻类生长显著减少约90%，真菌生长显著减少约95%。
