The Effects of Gas Composition on the Atmospheric Pressure Plasma Jet Modification of Polyethylene Films
The Effects of Gas Composition on the Atmospheric Pressure Plasma Jet Modification of Polyethylene Films
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DOI：
10.1088/1009-0630/17/5/07
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发表时间：
2015-05
影响因子：
1.7
通讯作者：
Sun Jie;Qiu Yiping
中科院分区：
文献类型：
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作者：
Sun Jie;Qiu Yiping
聚乙烯（PE）膜使用大气压等离子体射流（APPJ）与He或He/O2气体处理不同的时间段。研究了气体种类对等离子体-聚合物相互作用的影响。He/O2等离子体处理20 s后，PE薄膜的表面接触角可有效降低至58°，并在较长时间内基本保持不变; He等离子体处理120 s后，薄膜表面接触角逐渐下降至47°。原子力显微镜（AFM）的结果表明，均方根（RMS）粗糙度显着高于He/O2等离子体处理的样品比He等离子体处理的同行，和He/O2等离子体处理的PE膜的表面形貌显示均匀分布的圆顶形的小突起。化学成分分析表明，He等离子体处理的样品具有更高的氧含量，但比可比的He/O2处理的样品的−COO的百分比明显更低，这表明两种气体条件等离子体处理之间的氧结合模式存在差异。电子自旋共振（ESR）结果表明，He等离子体处理的样品的自由基浓度明显高于那些He/O2等离子体处理的其他条件不变。
Polyethylene (PE) films are treated using an atmospheric pressure plasma jet (APPJ) with He or He/O2 gas for different periods of time. The influence of gas type on the plasma-polymer interactions is studied. The surface contact angle of the PE film can be effectively lowered to 58° after 20 s of He/O2 plasma treatment and then remains almost unchanged for longer treatment durations, while, for He plasma treatment, the film surface contact angle drops gradually to 47° when the time reaches 120 s. Atomic force microscopy (AFM) results show that the root mean square (RMS) roughness was significantly higher for the He/O2 plasma treated samples than for the He plasma treated counterparts, and the surface topography of the He/O2 plasma treated PE films displays evenly distributed dome-shaped small protuberances. Chemical composition analysis reveals that the He plasma treated samples have a higher oxygen content but a clearly lower percentage of −COO than the comparable He/O2 treated samples, suggesting that differences exist in the mode of incorporating oxygen between the two gas condition plasma treatments. Electron spin resonance (ESR) results show that the free radical concentrations of the He plasma treated samples were clearly higher than those of the He/O2 plasma treated ones with other conditions unchanged.