Journal of Hebei University(Natural Science Edition) >

2019 , Vol. 39 >Issue 5: 478 - 483

DOI: https://doi.org/10.3969/j.issn.1000-1565.2019.05.006

Experimental study on discharge characteristics of argon plasma brush and its surface modification of PET

  • XU Huimin ,
  • TANG Xiao ,
  • XU Longfei ,
  • ZHAO Na ,
  • GAO Kun ,
  • JIA Pengying
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  • 1. Department of Basic Teaching, Hebei Institute of Finance, Baoding 071051, China; 2. College of Physics Science and Technology, Hebei University, Baoding 071002, China

Received date: 2019-03-20

  Online published: 2019-09-25

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Abstract

With blowing argon, a uniform planar plume with pulsed discharges is generated in ambient air at atmospheric pressure through a plasma brush excited by a direct current power supply. Results indicate that the core of the planar plume is very uniform, while its two edges are much brighter than the core region. Meanwhile, the length of the argon plume increases with increased gas flow rate. This argon brush is then used to improve hydrophilicity of polyethylene terephthalate(PET)surface. After a single scan of the plasma brush on the PET surface, a uniform surface modification is achieved with an improved hydrophilic width of about 24.0 mm. The polar groups are contained in oxidized materials, which are observed by scanning electron microscopy. Moreover, these polar groups have increased number density and scale with increasing the gas flow rate. Furthermore, water contact angle is found to decrease with increasing the gas flow rates until it reaches an almost constant value.

Key words： plasma brush; surface modification; uniform discharge; water contact angle

Cite this article

XU Huimin , TANG Xiao , XU Longfei , ZHAO Na , GAO Kun , JIA Pengying . Experimental study on discharge characteristics of argon plasma brush and its surface modification of PET[J]. Journal of Hebei University(Natural Science Edition), 2019 , 39(5) : 478 -483 . DOI: 10.3969/j.issn.1000-1565.2019.05.006

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