Preparation of κ-Al2O3/resin composite coating on polyethylene terephthalate foil for gas-permeation barrier
| Autor: | Wenjea J. Tseng, Jan-Hau Chang |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Process Chemistry and Technology engineering.material Methacrylate Surfaces Coatings and Films Electronic Optical and Magnetic Materials Contact angle chemistry.chemical_compound chemistry Chemical engineering Coating Materials Chemistry Ceramics and Composites Polyethylene terephthalate engineering Composite material Mass fraction Layer (electronics) FOIL method Visible spectrum |
| Zdroj: | Ceramics International. 40:16779-16784 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2014.08.048 |
| Popis: | Surface of κ-alumina (κ-Al 2 O 3 ) nanoplatelets was grafted by 3-(trimethoxysilyl)propyl methacrylate (MPS) molecules over a broad MPS/κ-Al 2 O 3 weight ratio from 0 to 0.9 in water/ethanol mixtures. The organic grafting resulted in a hydrophobic alumina surface with a contact angle greater than 90° from an initially hydrophilic surface with a contact angle of about 25°. The MPS-grafted nanoplatelets were dispersed in organic, ultraviolet (UV) curable resin with solids concentrations ranging from 0.01 to 0.15 weight fraction to form a coating layer of 50 μm on polyethylene terephthalate (PET) foil of 100 μm in thickness initially. The coated foil showed a maximum of 20% reduction on both water-vapor and oxygen-gas permeations when compared to that of the bare PET foil. The coated foil also showed a reduced transmission of visible light at wavelengths 2 O 3 fraction in resin was increased. A high transmission (>80%) yet remained for the visible light with wavelengths greater than ~550 nm over the κ-Al 2 O 3 fraction examined (up to 15 wt%). |
| Databáze: | OpenAIRE |
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