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Silver layers were fabricated by a spray electroless deposition approach on acrylonitrile-butadiene-styrene (ABS) substrate functionalized by a triazinedithiol compound of 6-(3-triethoxysilylpropyl)amino-1,3,5-triazine-2,4-dithiol monosodium (TES). TES, which acts as an interfacial molecular layer between ABS and silver layer, contains silylpropyl groups which can react with OH groups on resin surfaces treated by plasma. At the same time, thiol groups can react with silver layer. ABS surfaces treated by different processes were characterized with scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The SEM and AFM results showed that continuous, uniform layers of silver were obtained. The effect of plasma treatment time on ABS surface chemical structures was investigated. Additionally, the standard peeling test results showed that the silver layer had the adhesion strength of 23.2 N/mm when plasma treated for 10 min on ABS. From the results of XPS, the reaction of TES on the ABS was confirmed. XRD indicated that the silver layer on ABS surface was not oxidized and mainly existed in the metallic state. This method is fast, simple, nontoxic, palladium and chromium free, which could provide a novel consideration in resin plating industry. Key-words: Triazinedithiol, Silver spray electroless deposition, Molecular adhesive, Echingless Original Research Paper J. Jpn. Soc. Colour Mater., 88〔8〕,257–264(2015) 257 © 2015 Journal of the Japan Society of Colour Material -13provide a favorable interfacial adhesion enhancement layer as alternatives to the chromic etching. In this work, the triazinedithiol compound 6-(3triethoxysilylpropyl)amino-1,3,5-triazine-2,4-dithiol monosodium (TES) was initially introduced onto the plasma pretreated acrylonitrile-butadiene-styrene (ABS) surface, with further sensitization, silver layer was finally fabricated on the ABS surface using spray electroless deposition, which was carried out by simultaneously spraying the silver salt solution and reducing solution onto the ABS surface. Silver nitrate and ammonia aqueous solution was applied as silver salt solution and glyoxal was used as reduction agent. The ABS substrate surface according to the electroless deposition procedure was characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Adhesion test was carried out to study the effect of the plasma exposure time on the cohesive force between the silver layer and the ABS substrates. The formation mechanism of silver layer was also investigated with XPS.

A Novel Metallizing Method on Resin Surface Through Silver Spray Using Triazine Compound