One-step electrodeposition to fabricate robust superhydrophobic silver/graphene coatings with excellent stability

一步电沉积制备稳定性优异的强健超疏水Ag/石墨烯涂层

A facile method was proposed to prepare stretchable silver-based composite coatings with excellent conductivity and stability for flexible electronics.Silver coating was firstly deposited on thermoplastic polyurethane(TPU)elastomer rubber surface via two-component spraying technique,then the superhydrophobic surface was obtained by one-step electrodeposition of cerium compounds(CeM)and graphene nanosheets(GNS)to produce Ag/CeM/GNS composite coatings.The obtained Ag/CeM/GNS composite coatings maintained high conductivity after experiencing bending cycles and stretching cycles.Furthermore,the as-prepared Ag/CeM/GNS composite coatings showed excellent self-cleaning and anti-fouling properties,and the corrosion resistance has improved significantly compared to the original Ag coating.In addition,the Ag/CeM/GNS composite coatings could drive the circuit normally in the states of tensile,bending and twisting deformation,showing excellent mechanical stability and applicability.As a result,it is believed that the prepared Ag/CeM/GNS composite coatings with excellent conductivity and stability have promising applications for flexible electronics in harsh conditions.

提出一种用于柔性电子器件可拉伸银基复合涂层的制备方法,该涂层具有优导的导电性和稳定性。首先采用双组分喷涂法在弹性基板热塑性聚氨酯(TPU)弹性体橡胶表面制备银涂层,通过一步电沉积铈化合物(CeM)和石墨烯纳米片(GNS)获得超疏水表面,即Ag/CeM/GNS复合涂层。经多次弯曲和拉伸,Ag/CeM/GNS复合镀层仍具有较高的电导率,且复合涂层具有良好的自清洁和防污性能,耐腐蚀性较原Ag涂层显著提高。此外,Ag/CeM/GNS复合涂层在拉伸、弯曲和扭转等变形状态下仍正常导电,具有良好的力学稳定性和适用性。因此,所研制的Ag/CeM/GNS复合镀层具有优良的导电性能和稳定性,在苛刻条件下服役的柔性电子器件中具有广阔的应用前景。