High-performance oxygen barrier inorganic-organic coating for polymeric substrates

摘要: Abstract Aqueous-based inorganic–organic hybrid coating materials comprising self-assembled silica nanophase (SNAP) particles and the sodium salt of 9,10-anthraquinone-2,6-disulfonate (AQDS), an oxygen-scavenging precursor molecule, were coated onto PET films under ambient laboratory conditions using a spiral-bar technique. Active SNAP-based coatings containing 0.08% w/w AQDS displayed oxygen transmission rate 0.04 ± 0.01 cm 3  mil m − 2  day − 1  atm ; improvement in barrier by order magnitude compared with comparable produced dip-coating. The technique also provided other important technical advantages over previously used dip-coating method, including reduction concentration required solution almost magnitude. performance these single-layer active approaches that far more sophisticated multi-layer plastic vacuum-deposition methods.