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首页> 外文期刊>Journal of Applied Polymer Science >Influence of melt processing on biodegradable nisin-PBAT films intended for active food packaging applications
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Influence of melt processing on biodegradable nisin-PBAT films intended for active food packaging applications

机译：熔融加工对活性食品包装应用中可生物降解的乳清蛋白-PBAT薄膜的影响

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摘要

Biodegradable poly(butylene adipate-co-terephthalate) (PBAT) films incorporated with different levels of the antimicrobial peptide nisin were developed by melt processing. Structural, morphological, thermal, mechanical, and antimicrobial properties of the films were determined. The X-ray diffraction patterns exhibited decreasing levels of intensity at 20 values as the concentration of nisin increased. Scanning electron microscopy showed a heterogeneous morphology when higher amounts of nisin were incorporated. The antimicrobial films tested presented no significant differences in the melting temperature (123-125 degrees C), and the crystallization temperature ranged from 69 to 75 degrees C. The addition of nisin caused no significant modification in tensile strength values. However, results of Young's modulus and deformation at break differed significantly among samples. Active films demonstrated inhibition against the Gram-positive bacterium Listeria monocytogenes. These results demonstrated that PBATisin films produced by melt processing present a great potential for use as active food packaging materials aiming enhanced food safety. (c) 2015 Wiley Periodicals, Inc.
机译：通过熔融加工开发了掺有不同水平的抗菌肽乳链菌肽的可生物降解的聚己二酸丁二酯对苯二甲酸酯（PBAT）薄膜。确定了膜的结构，形态，热，机械和抗菌性能。随着乳链菌肽浓度的增加，X射线衍射图谱显示强度在20值时降低。当掺入更高量的乳链菌肽时，扫描电子显微镜显示出异质形态。所测试的抗菌膜在熔融温度（123-125摄氏度）上没有显着差异，结晶温度在69到75摄氏度之间。添加乳链菌肽对拉伸强度值没有明显的影响。但是，样品之间的杨氏模量和断裂变形的结果差异很大。活性膜显示出对革兰氏阳性细菌单核细胞增生李斯特菌的抑制作用。这些结果表明，通过熔融加工生产的PBAT /乳链菌肽膜具有用作增强食品安全性的活性食品包装材料的巨大潜力。 （c）2015年威利期刊有限公司

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