電界紡糸法と無電解めっき法を組み合わせ調製した極細酸化ニッケルチューブ

抄録

Sub-micrometer-sized or micrometer-sized nickel oxide tubes were prepared using combining electrospinning technique and electroless plating method. A polymer (poly(methyl methacrylate, PMMA) or poly(vinylidene fluoride-co-hexafluoropropylene) PVDF-HFP solution with palladium chloride was used as a spinning solution for electrospinning process. The spun fibers were immersed into the electroless nickel-phosphate (Ni-P) plating bath. The resultant fibers were coated with Ni-P layers. To remove the polymer fibers as a mold, the plated fibers were heated at 400−650 °C for 2 or 4 hr. Formation of sub-micrometer-sized or micrometer-sized nickel oxide tubes was confirmed through the SEM observation, EDX analysis, and X-ray diffraction measurements of heat-treated fibers. Heat treatment of the Ni-P layer on the polymer fibers also decreased the phosphorus content of the Ni layer. The average size of the nickel oxide tubes was 4.8 μm (outside diameter, O. D.), standard deviation (σ) = 0.81 μm and 2.5 μm (inside diameter, I. D.), σ = 0.43 μm prepared from PMMA fibers, and 0.7 μm (O.D.), σ = 0.17 μm and 0.3 μm (I.D.), σ = 0.025 μm from PVDF-HFP fibers.