The atmospheric pressure He- H 2 O plasma jet has been analyzed and its effects on the Kapton polyimide surface have been investigated in terms of discharge power effect. The polyimide surfaces before and after plasma treatment were characterized using atomic force microscopy (AFM), X-ray photoelectrons spectroscopy (XPS) and contact angle. The results showed that, increasing the discharge power induces remarkable changes on the emission intensity, rotational and vibrational temperatures of He- H 2 O plasma jet. At the low discharge power ≤5.2 W, the contact angle analysis of the polyimide surface remarkably decrease owing to the abundant hydrophilic polar C=O and N–C=O groups as well as increase of surface roughness. Yet, plasma treatment at high discharge power ≥5.2 W results in a slight decrease of the surface wettability together with a reduction in the surface roughness and polar groups concentrations.
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机译：已经分析了大气压的血浆射流，并在放电功率效应方面已经研究了其对Kapton聚酰亚胺表面的影响。使用原子力显微镜（AFM），X射线光电子光谱（XPS）和接触角以前和等离子体处理前后的聚酰亚胺表面。结果表明，增加放电功率对他 - H 2 O等离子体射流的发光强度，旋转和振动温度产生显着变化。在低放电功率≤5.2W，由于丰富的亲水性极性C = O和N-C = O基团以及表面粗糙度的增加，聚酰亚胺表面的接触角分析显着降低。然而，高放电功率的等离子体处理≥5.2W导致表面润湿性的略微降低，以及表面粗糙度和极性群浓度的降低。
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