ABSTRACT

The paper describes an experimental investigation of the possibility of industrial modification of surface wettability and adhesion of polymers by the action of a plasma of a gliding discharge generated in air at atmospheric pressure in a simulated production process. The test material was polypropylene plates (PP). The modification was performed by a device with a multi-electrode (four pairs) system, which is not common. The quality of pre-processing and usability was evaluated primarily in terms of the industrial requirements, which means a change in wettability and adhesion expressed by the contact angle/surface free energy value in dependence to sample exposure time expressed by the conveyor belt speed. The surface free energy assessment of a treated polymeric surface by contact angle measurement was carried out by analyzing static sessile drops and evaluated by Owens–Wendt–Rabel–Kaelble (OWRK) model. The results determined a set of operating parameters at which the modification process meets the industrial requirements. By evaluating the change in surface free energy in relation to the storage time, the degree of hydrophobic recovery of the treated samples, i.e. the time stability of the plasma-treated surface, was also determined. It has been found that plasma-treated PP surface fully meets industrial demands and can be stored for at least 50 days.

摘要

本文描述了在模拟生产过程中，通过在大气压力下在空气中产生的滑动放电等离子体的作用，对聚合物表面润湿性和粘附性进行工业改性的可能性的实验研究。测试材料是聚丙烯板（PP）。修改是由具有多电极（四对）系统的设备进行的，这并不常见。预处理的质量和可用性主要根据工业要求进行评估，这意味着由接触角/表面自由能值表示的润湿性和附着力的变化取决于传送带速度表示的样品暴露时间。通过分析静态固着液滴并通过 Owens-Wendt-Rabel-Kaelble (OWRK) 模型评估通过接触角测量处理的聚合物表面的表面自由能评估。结果确定了修改过程满足工业要求的一组操作参数。通过评估与储存时间相关的表面自由能变化，还确定了处理样品的疏水恢复程度，即等离子体处理表面的时间稳定性。已经发现等离子处理的PP表面完全满足工业需求，可以储存至少50天。通过评估与储存时间相关的表面自由能变化，还确定了处理样品的疏水恢复程度，即等离子体处理表面的时间稳定性。已经发现等离子处理的PP表面完全满足工业需求，可以储存至少50天。通过评估与储存时间相关的表面自由能变化，还确定了处理样品的疏水恢复程度，即等离子体处理表面的时间稳定性。已经发现等离子处理的PP表面完全满足工业需求，可以储存至少50天。