摘要
针对塑料化学镀过程中传统铬酸粗化处理工艺对环境及人体有害的缺点,选用偶联剂代替铬酸对塑料进行表面处理。研究了硅烷偶联剂KH550、KH560和钛酸酯类偶联剂NTC-4013种偶联剂的处理效果。结果表明,PVC塑料经过KH560处理后可以获得亲水性良好的表面层。对偶联剂处理后的PVC塑料进行化学镀Ni-Cu-P合金,镀层的XRD分析表明Ni-Cu-P为非晶态。用划痕法和弯折试验测试了镀层与基体间的结合力,通过扫描电镜观察了镀层表面形貌,EDS分析显示表面层由81.5%Ni、15.3%Cu和3.2%P组成。
Coupling agents,as the replacements of chromic acid for corsening in conventional electroless plating,were used to pretreat polyvinyl chloride(PVC) for electroless Ni-Cu-P plating so as to avoid the damage to environment and human body by the toxic chromic acid.Thus the pretreatment effects of silane coupling agents KH550 and KH560 and titanate ester-type coupling agent NTC-401 were investigated.The phase composition of the electroless Ni-Cu-P alloy coating on the surface of PVC after being treated with the silane coupling agents was analyzed by means of X-ray diffraction,while the adhesion of the alloy coating to the substrate was evaluated using scratch test and bending test.Moreover,the morphology of the electroless Ni-Cu-P alloy coating was observed using a scanning electron microscope,and its elemental composi-tion was determined using an energy dispersive spectrometer.It was found that the PVC plastic after being treated with silane coupling agent KH560 was strongly hydrophilic,and the corresponding electroless Ni-Cu-P alloy coating had amorphous structure and was well adhered to the substrate.The elemental composition(mass fraction) of the alloy coating was determined as 81.5% Ni,15.3% Cu and 3.2% P.
出处
《材料保护》
CAS
CSCD
北大核心
2008年第1期65-67,共3页
Materials Protection
关键词
粗化处理
硅烷偶联剂
PVC塑料
化学镀NI-CU-P
前处理
corsening treatment
silane coupling agent
PVC plastic
electroless plating
Ni-Cu-P alloy coating
pretreatment
