Ni-nSiO_(2)纳米复合电镀制备钢基超双疏表面探究

Investigation of the Preparation of Steel-Based Superamphiphobic Surface by Ni-nSiO_(2) Nanocomposite Electroplating

为了实现在钢材基体上超双疏表面的制备,同时避免破坏钢基表面的物理性质,基于Ni-nSiO_(2)纳米复合电沉积技术,提出一种在船用Q235钢材上制备超双疏表面的制备工艺。首先通过纳米复合电镀以及液相沉积法,在钢基表面构造适合超双疏性能的微纳米双重粗糙度结构,随后用十七氟癸基三甲氧基硅烷进行表面修饰。通过设计三因素正交试验,改变电镀参数(温度、时间、电流)并分析各参数对表面润湿性的影响,得到可以实现超双疏的制备工艺参数。然后通过扫描电子显微镜对制备的双疏表面的微观形貌进行分析。研究结果表明:当电流密度为12.5 A/dm^(2)、磁流搅拌速度为200 r/min、电镀时间为50 min、温度为60℃时,可制备出与水的接触角为154°、与油的接触角为151°的钢基超双疏表面。在该参数下,通过复合电沉积过程得到了微纳米粗糙形貌,结合低表面能修饰,使得表面呈现出超双疏的特性。

In order to realize the preparation of a superamphiphobic surface on the steel substrate and simultaneously avoid damage to the physical properties of the steel substrate surface, a preparation process for preparing superamphiphobic surface on marine Q235 steel was proposed on the basis of Ni-nSiO_(2)nanocomposite electrodeposition technology. Firstly, a micro-nano double-roughness structure suitable for superamphiphobic properties was constructed on the surface of the steel substrate by nanocomposite electroplating and liquid phase deposition, and then the surface was modified with heptadecafluorodecyl trimethoxysilane. By designing a three-factor orthogonal experiment, the preparation process parameters that could realize superamphiphobic surface were obtained by changing the electroplating parameters(temperature, time, current) and analyzing the influence of each parameter on the surface wettability. Additionally, the microscopic morphology of the as-prepared superamphiphobic surface was analyzed by scanning electron microscopy. Results showed that when the current density was 12.5 A/dm^(2), the magnetic stirring speed was 200 r/min, the electroplating time was 50 min, and the temperature was 60 ℃, the as-prepared steel-based superamphiphobic surface presented a contact angle of 154° with water and a contact angle of 151° with oil. Under the above parameters, the combination of micro-nano rough morphology obtained through the composite electrodeposition process and low surface energy modification made the surface exhibited superamphiphobic properties.