Nanometer multilayer water-oxygen barrier film and preparation method and application thereof
A water-oxygen barrier film, nano-multilayer technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex process and high cost, and achieve film-forming effect, improve The ability to block water and oxygen, the effect of dense distribution
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Embodiment 1
[0039] Such as Figure 1 ~ Figure 3 As shown, the present embodiment is a method for preparing a nano-multilayer water-oxygen barrier film, which is specifically:
[0040] S1, modifying the elongated nano-inorganic particles to obtain modified nano-inorganic particles. Specifically: mix fluorine-containing acrylic acid and polyaminosilane coupling agent into the solvent, remove the solvent after stirring and reacting to obtain fluorine-containing polyaminosilane coupling agent; hydrolyze the fluorine-containing polyaminosilane coupling agent to obtain fluorine-containing polyamino Silane coupling agent hydrolyzate; disperse nano-inorganic particles in a solvent to obtain a dispersion of nano-inorganic particles; add fluorine-containing polyaminosilane coupling agent hydrolyzate to the dispersion of nano-inorganic particles and mix, then heat and stir to reflux, After centrifugal separation and drying, the nano-inorganic particles modified by the fluorine-containing polyaminos...
Embodiment 2
[0053] Nano-alumina particles with a columnar structure length of 100nm are mixed into PI plastic particles in proportions of 5%, 10%, 20%, 30% and 40% by mass, and PET is used as the second plastic particle, and then passed Hot-melt extrusion, layering, rectification and cooling into A / A / ...A / A / B alternate film layers, where the number of A film layers is 10, 20, 30, 50, 80 and 100 layers, and then A variety of nano-multilayer water-oxygen barrier films were prepared by stretching each layer of film longitudinally and transversely at a pull-up ratio of 4.0.
[0054] When the defect in the barrier film is 0.2-0.3nm, the defect hole is below 0.3nm, the penetration of water vapor and oxygen is difficult, the penetration path is small and curved, and the penetration is relatively slow.
[0055] Then, the water-oxygen barrier coefficient WVTR performance at 38°C and 100% relative humidity was measured by the Mocon method. The WVTR test results of all nanometer multilayer water-oxy...
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