Textile Coloration and Finishing (한국염색가공학회지)

The Korean Society of Dyers and Finishers (한국염색가공학회)
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Photooxidation of Poly(vinyl butyral) Films by UV/Ozone Irradiation

자외선/오존 조사에 의한 Poly(vinyl butyral)의 광산화

  • Joo, Jin-Woo (Department of Materials Design Engineering, Kumoh National Institute of Technology) ;
  • Jang, Jinho (Department of Materials Design Engineering, Kumoh National Institute of Technology)
  • 주진우 (금오공과대학교 소재디자인공학과) ;
  • 장진호 (금오공과대학교 소재디자인공학과)
  • Received : 2015.04.01
  • Accepted : 2015.04.30
  • Published : 2015.06.27
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Abstract

Poly(vinyl butyral), PVB was photooxidized by UV/ozone irradiation and the effect of UV energy on the surface properties of the UV-irradiated PVB film were investigated by the measurement of reflectance, surface roughness, contact angles, elemental composition, and zeta potential. With increasing UV energy, reflectance decreased in the visible and ultraviolet regions particularly at the wavelength of 400nm. The irradiation produced nano-scale surface roughness including the maximum peak-to-valley roughness increased from 274nm for the unirradiated PVB to 370nm at the UV energy of $5.3J/cm^2$. The improved hydrophilicity was due to the higher $O_{1s}/C_{1s}$ resulting from the introduction of polar groups such as C=O bonds. The surface energy of the PVB film increased from $35.3mJ/m^2$ to $39.3mJ/m^2$ at the irradiation of $15.9J/cm^2$. While the zeta potentials decreased proportionally with increasing UV energy, the cationic dyeability of the PVB increased accordingly resulting from the improved affinity of the irradiated PVB surfaces containing the photochemically introduced anionic and dipolar dyeing sites.

Keywords

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  1. Surface Photooxidation of Poly(butylene terephthalate) Films by UV/Ozone Irradiation vol.28, pp.2, 2016, https://doi.org/10.5764/TCF.2016.28.2.63