Preparation and Infrared Interference Performance of Nickel-plated Graphene

In order to investigate the infrared extinction performance of nickel-plated graphene and explore the best formulation, nickel-plated graphene was prepared by the redox and chemical plating methods. The influence of various factors on the extinction performance of nickel-plated graphene was analyzed by designed orthogonal experiments with the infrared decay rate as the evaluation index, and the optimal formulation was determined. The infrared transmittance of nickel-plated graphene was measured in a smoke-screen chamber test. The average mass extinction coefficient of nickel-plated graphene was calculated by linear fitting according to the “Lambert-Beer” law. The results showed that the optimal process parameters for the preparation of nickel-plated graphene were: c(NiSO4·6H2O) =20 g·L-1, c(NaH2PO2·H2O) =24 g·L-1, c(C6H5Na3O7·2H2O) =10 g·L-1, c(NH4Cl) =30 g·L-1, pH=8-9, and plating temperature of 65 °C. The nickel-plated graphene prepared under the optimal conditions exhibited good infrared extinction in both mid- and far-infrared wavelengths. The average mass extinction coefficients of the nickel-plated graphene in the infrared bands of 3-5 μm and 8-14 μm were 2.38 m2·g-1 and 2.19 m2·g-1, respectively. Compared with the modified graphene, the average mass extinction coefficients of nickel-plated graphene in the mid-infrared bands were improved by 30% and 35%, respectively, which have broader application prospects. © 2022 Institute of Chemical Materials, China Academy of Engineering Physics. All rights reserved.