Plasma-induced hemi-wicking on sanded polymer surfaces

Po Hsien Chiu, Ching Jung Wu, Chun Ping Hsiao, Chih Tung Liu, Mu Chien Wu, Jong Shinn Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In this paper, a plasma-induced hemi-wicking phenomenon observed on hydrophobic sanded polymer surfaces, polypropylene (PP), polyethylene terephthalate (PET) and polyethylene (PE) is reported. An atmospheric-pressure argon plasma jet was used to treat a limited area of the carefully sanded polymer surfaces to induce the hemi-wicking phenomenon. Such hemi-wicking triggered by the plasma activation is different from the traditional type, which is achieved purely by the surface topography. Surface analyses by X-ray photoelectron spectroscopy (XPS) and water contact analysis (WCA) show that the combination of sanding and plasma treatment increased the oxygen-to-carbon ratio, which is highly beneficial for surface hydrophilicity. The shear stress tests show that the combination of sanding and plasma treatment can enhance the shear stress by 125%, 95%, and 296% on PP, PET, and PE, respectively. The study shows that the newly developed technique by combining the sanding and plasma processing for polymers could be a potentially useful method in future industry applications.

Original languageEnglish
Article number871
JournalCoatings
Volume11
Issue number8
DOIs
StatePublished - Aug 2021

Keywords

  • Adhesion
  • Atmospheric-pressure plasma jet (APPJ)
  • Hemi-wicking
  • Polyethylene (PE)
  • Polyethylene terephthalate (PET)
  • Polymer
  • Polypropylene (PP)
  • Sanding
  • Superwetting
  • Water contact angle (WCA)
  • X-ray photoelectron spectroscopy (XPS)

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