Optimizing electric corona treatment for hydroxypropylated starch-based coatings
| Autor: | Robertas Maldzius, Jonas Sidaravicius, Sami-Seppo Ovaska, Tadeus Lozovski, Johanna Lyytikäinen, Ringaudas Rinkunas, Ekaterina Soboleva, Leena-Sisko Johansson, Kaj Backfolk |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Thermoplastic Dispersion barrier coating Polymers and Plastics Corona treatment 02 engineering and technology Contact angle Corona (optical phenomenon) X-ray photoelectron spectroscopy Surface energy Materials Chemistry ta215 Corona discharge 040101 forestry chemistry.chemical_classification Organic Chemistry Direct current 04 agricultural and veterinary sciences 021001 nanoscience & nanotechnology Hydroxypropylated starch chemistry Chemical engineering 0401 agriculture forestry and fisheries 0210 nano-technology Reverse-side treatment |
| Zdroj: | CARBOHYDRATE POLYMERS. 197:359-365 |
| ISSN: | 0144-8617 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect