冷等离子体处理工艺对丁腈橡胶表面性能的影响

Effects of Cold Plasma Treatment Process on Surface Properties of Acrylontrile-butadiene Rubber

目的采用冷等离子体处理工艺(CPT)改善丁腈橡胶(NBR5080)的表面润湿性。方法采用Ar、空气和O2等3种气氛,通过调整工艺参数对NBR5080进行表面处理,测试NBR5080的静态接触角、计算表面能;用扫描电子显微镜(SEM)及原子力显微镜(AFM)观察表面形貌;X射线光电子能谱(XPS)测试分析表面的化学元素。结果 3种气氛处理后,NBR5080的静态接触角由91°分别降到25°,27°,35°,表面粗糙度由16.37 nm分别提高到97.78,75.12,59.58 nm;与聚四氟乙烯薄膜之间由不能粘接到剥离强度分别提高到44.2,40.6,32.3 N/m。结论 3种处理气氛均能改善NBR5080的表面润湿性,其中Ar气氛的处理效果最佳,处理工艺参数为功率100 W、时间600 s、压强30 Pa;处理后的NBR5080与PTFE的粘接性能明显提高;处理后NBR5080的表面润湿性变化存在时效性。

The work aims to improve surface wettability of acrylontrile-butadiene rubber（NBR5080） by adopting cold plasma treatment（CPT）. The surface of NBR5080 was treated by adjusting technological parameters（power, time and pressure） of the cold plasma in Ar, air and O_2 atmospheres. The static contact angle of NBR5080 was tested and the surface energy was calculated. The surface morphology was observed by scanning electron microscope（SEM） and atomic force microscope（AFM）. The chemical elements of the surface were analyzed by using the X-ray photoelectron spectroscopy（XPS）. After treatment of the 3 atmospheres, the static contact angle of NBR5080 reduced from 91° to 25°, 27° and 35° and the surface roughness amouted from 16.37 nm to 97.78 nm, 75.12 nm and 59.58 nm. The peeling strength between PTFE film and NBR5080 increased from 0 N·m^（–1） to 44.2 N·m^（–1）, 40.6 N·m^（–1） and 32.3 N·m^（–1） after being treated in Ar, air and O_2 respectively. The 3 treatment media can improve the surface wettability of NBR5080, the treatment effect Ar is the best and the technological parameters are 100 W（power）, 600 s（duration） and 30 Pa（pressure）; the adhesion between NBR5080 and PTFE increases significantly and the surface wettability of NBR5080 is subject to timeliness after treatment.