Optimizing electric corona treatment for hydroxypropylated starch-based coatings

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Johanna Lyytikäinen
  • Sami Seppo Ovaska
  • Ekaterina Soboleva
  • Ringaudas Rinkunas
  • Tadeus Lozovski
  • Robertas Maldzius
  • Jonas Sidaravicius
  • Leena-Sisko Johansson

  • Kaj Backfolk

Organisaatiot

  • Lappeenranta University of Technology
  • Vilnius University
  • University of Bialystok Vilnius Branch

Kuvaus

The aim of this investigation was to determine the role of negative direct current and alternating current (plasma) corona treatments in modification of bio-based dispersion barrier coatings and the response of replacing fossil-based binder with a thermoplastic bio-based binder (starch). The study emphasizes the importance of understanding and optimizing electric corona discharge in order to obtain high oxidation level without harming the substrate and causing unintentional treatment of the reverse side. The coatings were exposed to different corona treatment conditions using a novel developed sheet-fed laboratory-scale device. Corona-induced topographical, mechanical and surface chemical changes were observed from atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and contact angle and surface energy measurements. XPS results indicated further that partial starch decomposition occurred after plasma treatment. Coated surfaces became substantially smoother after both treatments suggesting that nanoparticle migration and re-orientation effects occurred. Additionally, reverse side effects and strike through were also discussed.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut359-365
Sivumäärä7
JulkaisuCarbohydrate Polymers
Vuosikerta197
TilaJulkaistu - 1 lokakuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 26220081