於不同高分子奈米顆粒表面施行無電鍍鎳

Abstract

使用次磷酸鈉作為還原劑，以無電鍍的方式在聚苯乙烯-聚苯胺核殼奈米顆粒以及聚苯乙烯奈米顆粒之表面鍍上鎳磷合金，在實驗中省略了敏化步驟，以鈀離子吸附於基材表面施行活化，無電鍍反應後的產物以SEM、TEM、EDS、XRD等儀器分析。 高分子顆粒表面對於鈀離子的吸附能力將會影響活化的效果，本論文探討鈀離子對此兩種不同的奈米顆粒的吸附能力。 在對奈米顆粒施鍍的過程中，發現施鍍於不同的奈米顆粒表面上，鍍層的性質及無電鍍的反應速率會有不同。在鎳磷合金開始沈積之前會有一段誘導期，誘導期中不會有合金的沈積，本論文也探討在不同的高分子奈米顆粒上施鍍之鍍層成分、誘導期長短及鍍層沈積速率。

Nickel-phosphorus alloys were electrolessly deposited on the surfaces of polystyrene nanoparticles and polyaniline-coated-polystyrene nanopar- ticles using sodium hypophosphite as reducing agent. In this work, the sensitization process was omitted, and the activation process was applied by adsorption of palladium ions on the surfaces of substrates. Products after electroless plating were analyzed by SEM, TEM, EDS and XRD. The efficacy of activation was influenced by the adsorption ability of palladium ions on the surfaces of polymer particles. The adsorption ability of palladium ions on the surfaces of these two different polymer nanopar- ticles was studied. During the process of electroless plating on the nanoparticles, we found that the composition of deposits and the deposition rate were different when depositing on different polymer nanoparticles. Before the deposition of nickel-phosphorus alloys started, there was an induction period, in which no alloys were deposited. The composition of nickel- phosphorus deposits, the length of induction time and the deposition rate when plating on these two different polymer nanoparticles were also studied.