Pure nickel and Ni-TiO 2 composite coatings were deposited on the copper substrate using Watts bath containing different contents of TiO 2 nanoparticles by the electrochemical deposition method, and the morphological alterations and hydrophobicity of coatings were studied. Field emission scanning electron microscopy (FESEM) images proved that composite coatings exhibited a rougher structure than pure nickel coating. The results of the roughness measurement performed by AFM confirmed this fact. The water contact angles (WCA) of pure nickel and the composite coatings were obtained as 62.7° and 91.6–121.7°, respectively. After surface chemical modification using the different concentrations of TMPSi, WCA of pure Ni and optimized composite coatings (Ni-27.5 g.L −1 ) were increased to 102.1° and 140.3°, respectively.

中文翻译：

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TiO 2纳米粒子对电沉积Ni-TiO 2复合涂层形貌和疏水性的作用

通过电化学沉积法，用含有不同含量的TiO 2纳米粒子的瓦特浴，在铜基体上沉积了纯镍和Ni-TiO 2复合涂层，并研究了涂层的形貌变化和疏水性。场发射扫描电子显微镜（FESEM）图像证明，复合涂层比纯镍涂层具有更粗糙的结构。由AFM进行的粗糙度测量结果证实了这一事实。纯镍和复合涂层的水接触角（WCA）分别为62.7°和91.6–121.7°。在使用不同浓度的TMPSi进行表面化学改性后，纯Ni和优化的复合涂层（Ni-27.5 gL -1）的WCA分别增加到102.1°和140.3°。