Gas Permeability and Permselectivity of Poly(L‐Lactic Acid)/SiOx Film and Its Application in Equilibrium‐Modified Atmosphere Packaging for Chilled Meat |
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Authors: | Tungalag Dong Shuxin Song Min Liang Yu Wang Xiaojing Qi Yuqin Zhang Xueyan Yun Ye Jin |
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Affiliation: | College of Food Science and Engineering, Inner Mongolia Agricultural Univ, Hohhot, Inner Mongolia, China |
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Abstract: | A layer of SiOx was deposited on the surface of poly(L‐lactic acid) (PLLA) film to fabricate a PLLA/SiOx layered film, by plasma‐enhanced chemical vapor deposition (PECVD) process. PLLA/SiOx film showed Young's modulus and tensile strength increased by 119.2% and 91.6%, respectively, over those of neat PLLA film. At 5 °C, the oxygen (O2) and carbon dioxide (CO2) permeability of PLLA/SiOx film decreased by 78.7% and 71.7%, respectively, and the CO2/O2 permselectivity increased by 32.5%, compared to that of the neat PLLA film. When the PLLA/SiOx film was applied to the equilibrium‐modified atmosphere packaging of chilled meat, the gas composition in packaging reached a dynamic equilibrium with 6% to 11% CO2 and 8% to 13% O2. Combined with tea polyphenol pads, which effectively inhibited the microbial growth, the desirable color of meat was maintained and an extended shelf life of 52 d was achieved for the chilled meat. |
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Keywords: | chilled meat equilibrium‐modified atmosphere packaging permeability poly(L‐lactic acid) SiOx
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