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首页> 外文期刊>Journal of Applied Polymer Science >Effect of storage temperature and time on stability of poly(lactide)-whey protein isolate laminated films
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Effect of storage temperature and time on stability of poly(lactide)-whey protein isolate laminated films

机译：储存温度和时间对乳清蛋白分离膜的稳定性的影响

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摘要

The stability of biopolymeric multilayer film fabricated from poly(lactide) (PLA) and glycerol-plasticized whey protein isolate (WPI), PLA/WPI/PLA, at 4 degrees C, 25 degrees C, and 35 degrees C were examined. The PLA/WPI/PLA film showed small rates of decreasing in transparency and increasing total color difference. Storage at 35 degrees C caused the film to become stronger and less extendible. The multilayer structures showed lower tensile strength and higher elongation over storage at 4 degrees C and 25 degrees C. Oxygen and water vapor barrier abilities of PLA/WPI/PLA gradually improved over time, especially at 35 degrees C. The changes in properties of laminate structure can be empirically fitted with either zero- or first-order reaction kinetics, with overall R-2 0.90. The results suggested that PLA/WPI/PLA film could be stored at 4-35 degrees C, 50-59% RH, for extended period of inventory time. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43547.
机译：在4摄氏度，25摄氏度和35摄氏度下，检查了由聚丙交酯（PLA）和甘油增塑的乳清蛋白分离物（WPI），PLA / WPI / PLA制造的生物聚合物多层膜的稳定性。 PLA / WPI / PLA膜显示出较小的透明度降低率和总色差增加率。在35摄氏度下储存会导致薄膜变得更结实，延展性降低。多层结构在4摄氏度和25摄氏度的储存条件下显示出较低的拉伸强度和较高的伸长率。PLA/ WPI / PLA的氧气和水蒸气阻隔能力随着时间的推移逐渐提高，尤其是在35摄氏度时。层压板的性能变化该结构可以根据经验拟合零级或一级反应动力学，总R-2为0.90。结果表明，PLA / WPI / PLA膜可以在4-35摄氏度，50-59％RH下保存，以延长库存时间。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43547。

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