Square plates of polypropylene (PP), dimensions 100 mm × 100 mm × 4.5 mm, were treated by atmospheric dielectric barrier discharge (DBD) generated between two disk-type electrodes (Ø 75 mm), energized from an ac amplifier 30 kV, 20 mA. The study aimed at evaluating the factors that affect the roughness and the triboelectric behavior of the plasma-treated samples. The alteration of surface aspect after each treatment was clearly visible with the naked eye and the changes were confirmed by measurements carried out with a portable roughness meter (Surftest SJ-210) and a digital microscope (Keyence VHX-7000). The roughness of the PP samples increased from an initial arithmetic mean Ra = 0.06 μm (±0.01 μm) and standard deviation Rq = 0.08 μm (±0.01 μm) to Ra = 0.22 μm (±0.03 μm) and Rq = 0.25 μm (±0.03 μm), respectively. These increases were highly dependent on the air gap distance (10.5–13.5 mm), the treatment time (5–20 min), and the configuration of the DBD cell, i.e., the number (one or two) and the thickness (4–5 mm) of the glass dielectric barriers. Untreated and DBD-treated samples were tribocharged in a linear tribometer, to evaluate the effect of the cold plasma treatment on the electric potential generated on the polymer surface by the triboelectric effect. The electric potential measured by a noncontact electrostatic voltmeter (Trek, 341B) was higher and better distributed over the surface of the plasma-treated samples.

中文翻译：

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常压DBD处理不同参数对聚丙烯摩擦起电后表面粗糙度及电位分布的影响研究


尺寸为 100 mm × 100 mm × 4.5 mm 的聚丙烯 (PP) 方板，通过两个盘式电极（直径 75 mm）之间产生的大气介质阻挡放电 (DBD) 进行处理，由交流放大器 30 kV、20毫安。该研究旨在评估影响等离子体处理样品的粗糙度和摩擦电行为的因素。每次处理后表面外观的变化用肉眼清晰可见，并且通过使用便携式粗糙度计 (Surftest SJ-210) 和数码显微镜 (Keyence VHX-7000) 进行的测量来确认这些变化。 PP 样品的粗糙度从最初的算术平均值 Ra = 0.06 μm (±0.01 μm) 和标准差 Rq = 0.08 μm (±0.01 μm) 增加到 Ra = 0.22 μm (±0.03 μm) 和 Rq = 0.25 μm (± 0.03μm），分别。这些增加高度依赖于气隙距离（10.5-13.5 毫米）、处理时间（5-20​​ 分钟）以及 DBD 单元的配置，即数量（一个或两个）和厚度（4- 5 mm）的玻璃介电屏障。未处理和 DBD 处理的样品在线性摩擦计中进行摩擦充电，以评估冷等离子体处理对摩擦起电效应在聚合物表面产生的电势的影响。通过非接触式静电电压计（Trek，341B）测量的电势更高，并且在等离子体处理的样品表面上分布更好。