Influence of air addition on surface modification of polyethylene terephthalate treated by an atmospheric pressure argon plasma brush

• 作者: Jiacun WU Kaiyue WU Junyu CHEN Caihong SONG Pengying JIA Xuechen LI
• 来源期刊: 等离子体科学和技术（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: PLASMA TECHNOLOGY
• 页码范围: 127-134
• 页数: 8页
• 语种: 英文

摘要

An atmospheric pressure argon plasma brush with air addition is employed to treat polyethylene terephthalate(PET)surface in order to improve its hydrophilicity.Results indicate that the plasma plume generated by the plasma brush presents periodically pulsed current despite a direct current voltage is applied.Voltage-current curve reveals that there is a transition from a Townsend discharge regime to a glow one during one discharge period.Optical emission spectrum indicates that more oxygen atoms are produced in the plume with increasing air content,which leads to the better hydrophilicity of PET surface after plasma treatment.Besides,an aging behavior is also observed.The hydrophilicity improvement is attributed to the production of oxygen functional groups,which increase in number with increasing air content.Moreover,some grain-like structures are observed on the treated PET surface,and its mean roughness increases with increasing air content.These results are of great importance for the hydrophilicity improvement of PET surface with a large scale.