A composite thin film of polyvinyl alcohol and carbon dots for UV light blocking and sustainable food packaging
발표자
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초록
내용
Ultraviolet (200-400 nm) rays are the most common high-frequency waves, followed by X-rays, and gamma rays. Despite the fact that the majority of UV light is absorbed in the atmosphere, however, a little quantity still reaches the earth's surface, causing sunburn, skin damage, and cataract-like diseases. To overcome this issue, we prepared UV light absorbable carbon dots, using amino acids and Thiourea. These carbon dots have a concentration-dependent UV absorption capacity. Carbon dots having absorb the until 320 nm complete 100% UV light, in order to maintain mechanical properties of UV shielding polymer thin films. Nanomaterials that absorb in the UV region and re-emit in the visible region are of utmost importance. In addition, it is highly important to optimize the appropriate concentration of nanomaterials in a polymeric matrix in order to maintain the desired physical properties, such as transparency, tensile strength, crystallinity, flexibility, etc.