尼龙12粉体表面化学镀镍研究

Study on Electroless Nickel Plating on Nylon 12 Surface

采用KH550改性、SnCl_2敏化和PdCl_2活化尼龙12(PA12)粉体,结合化学镀工艺制备Ni颗粒/PA12复合粉体。借助扫描电镜、热重、X射线衍射等分析手段,研究PA12粉体表面催化位点(活性基团、Sn粒子和Pd粒子)的结构特性对镍镀层结构特性的影响规律。结果表明:PA12粉体表面活性基团、Sn粒子和Pd粒子均可催化诱导化学镀镍,且镀层结晶特性依次增加,镍颗粒的沉积量分别为1%、12%和25%,镍颗粒平均粒径分别为390 nm、95 nm和289 nm,只有Pd粒子催化可在PA12粉体表面制备致密镀层。

In this work, the electroless nickel plating on Nylon 12 (PA12) powder surface was developed based on 3-aminopropyltriethoxysilane modification, SnCl2 sensitization and PdCl2 activization. Effect of PA12 surface structural properties (active group, Sn particle and Pd particle) on structural properties of nickel-plated coating were investigated using scanning electron microscopy, X-ray diffraction and thermal analysis. Results showed that active group, Sn particle and Pd particle can catalyze the electroless nickel plating on the PA12 surface. It can enhance the crystallinity of nickel-plated coating, Ni-particle content were 1%,12% and 25%, average Ni-particle size of plating coating were 390 nm,95 nm and 289 nm. Only when the catalytic particle is Pd particle, Ni particles can fully covered on PA12 surface.