This research work is devoted towards the development of highly efficient and cost-effective multifunctional nanocoating by silica-titania core-shell particles. These core-shell nanoparticles were synthesized by peptization process. Easy synthesis steps and low processing temperature is major achievement of this technique. In this research, developed core-shell nanoparticles were incorporated in polyurethane (PU) at various concentration for the development of multifunctional surfaces on mild steel substrate. Reason behind this core-shell fabrication is to merge two different material properties in a single structure, in which silica (SiO₂) is used as a core material for improvement in mechanical properties and shell titania (TiO₂) is used to enhance the antimicrobial as well as hydrophobicity of the same coating surface. Initially, prepared nanoparticles were investigated by TEM and XPS for the confirmation of core-shell structure. Further these nano core-shell particles were aided in to the PU matrix and developed coatings were characterised by antimicrobial testing, surface wettability (water and oil), scratch-resistance, corrosion and erosion behaviour. After analysing all the data, we found the best results at 4% (wt) concentration of nano core-shell particles aided in the PU coating system for multipurpose applications.

这项研究工作致力于通过二氧化硅-二氧化钛核-壳颗粒开发高效且具有成本效益的多功能纳米涂层。这些核壳纳米粒子是通过胶溶过程合成的。简单的合成步骤和低加工温度是该技术的主要成就。在这项研究中，开发的核壳纳米粒子以不同浓度掺入聚氨酯 (PU) 中，用于在低碳钢基材上开发多功能表面。这种核壳制造背后的原因是将两种不同的材料特性合并到一个结构中，其中二氧化硅 (SiO ₂ ) 用作核材料以改善机械性能和壳二氧化钛 (TiO ₂) 用于增强同一涂层表面的抗菌性和疏水性。最初，制备的纳米粒子通过 TEM 和 XPS 进行研究，以确认核壳结构。此外，这些纳米核-壳颗粒有助于聚氨酯基质，开发的涂层具有抗菌测试、表面润湿性（水和油）、抗划伤、腐蚀和侵蚀行为的特点。在分析了所有数据后，我们发现在 4% (wt) 浓度的纳米核壳颗粒有助于多用途应用的 PU 涂层系统中获得最佳结果。