超声波处理聚氨酯泡沫化学镀镍优化工艺*

为研究聚氨酯泡沫化学镀镍在超声波处理条件下的最优工艺,探讨不同超声波功率对聚氨酯泡沫化学镀镍沉积速率和电阻率的影响,并在超声波频率25Hz、功率90W下设计正交试验,确定聚氨酯泡沫化学镀镍的最佳工艺条件。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和热震试验等手段分别对镀镍聚氨酯泡沫的表面形貌、晶型结构和镀层的结合力进行表征。结果表明:随着超声波功率的增大,化学镀镍的沉积速率加快,在超声波功率为90W时,沉积速率增加趋势减慢,电阻率得到最小1.3Ω.cm。通过正交试验得出:当NiSO4浓度为35g/L,NaH2PO2.H2O浓度为20g/L,Na3C6H5O7.2H2O浓度为20g/L,pH为9,温度45℃,施镀时间为40min时,工艺条件最优。在最佳工艺条件下进行施镀,聚氨酯泡沫镀层光亮、均匀、覆盖完全,导电性和结合力良好。

Condition Optimization of Electroless Nickel Plating for PUF with Ultrasonic Treatment

To research the optimal process of electroless plating nickel for PUF under the condition of ultrasonic treatment,the effects of different ultrasonic power on the deposition rate and resistivity of Ni-coated were studied.Orthogonal experiment under the condition of 25 Hz,90 W was designed and the optimal process conditions were obtained.The surface morphology,composition and adhesion of Ni-coated PUF were characterized by SEM,XRD,and thermal shock tests.The results show that the deposition rate increases with increasing ultrasonic power.When the ultrasonic power is more than 90 W,the deposition rate slowly changes.As the ultrasonic power increases,the resistivity decreases and the minimum is 1.3 Ω·cm when the ultrasonic power is 90 W.Then the resisptivity increases at higher ultrasonic power.The optimum process conditions are as follows: 35 g/L NiSO4,20 g/L NaH2PO2·H2O,20 g/L Na3C6H5O7·2H2O,pH 9,plating temperature of 45 ℃,and time of 40 min.The obtained nickel plating layer is even and completely covered,and has bright luster,high conductivity,and good adhesion under the optimal conditions.