文献类型： 外文期刊

作者： Wang, Limei ¹ ; Zhang, Jin ¹ ; Yun, Xueyan ¹ ; Hu, Jian ¹ ; Lu, Hao ¹ ; Dong, Tungalag ¹ ;

作者机构： 1.Inner Mongolia Agr Univ, Coll Food Sci & Engn, 306 Zhaowuda Rd, Hohhot 010010, Inner Mongolia, Peoples R China

2.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot 010031, Inner Mongolia, Peoples R China

关键词： Chinese winter jujube ( Ziziphus Jujuba Mill.cv.; Dongzao); Modified atmosphere packaging; Poly(L-lactic acid)

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.2； 五年影响因子：7.8 ）

ISSN： 0141-8130

年卷期： 2023 年 253 卷

页码：

收录情况： SCI

摘要： The effect of poly(L-lactic acid)/poly(ethylene glycol)-poly(L-lactic acid) block film on preservation of Chinese winter jujube (Ziziphus Jujuba Mill.cv.Dongzao) was investigated. Eight arm poly(ethylene glycol)-poly(L-lactic acid) block copolymer (8-PEG/PLLA) and net structure 8-PEG/PLLA (NET-PEL) were successfully synthetized by ring-opening polymerization, and different percentages (5, 10, and 20 %) of them were blended with PLLA to prepared blends films. Mechanical properties, modulated different scanning calorimetry (MDSC), gas and water vapor permeability results showed that 8-PEG/PLLA and NET-PEL block copolymer greatly increased the toughness of blend films, could be decrease PLLA segment glass transition temperature (Tg)from 59.5 degrees C to 41.6-46.7 degrees C and cold crystallization temperature(Tcc)from 89.4 degrees C to 73.5-77.7 degrees C, and increased the oxygen (O2), carbon dioxide (CO2), and water vapor transmission rate. The an appropriate gas concentration [O2 (2.56-3.51 %), CO2 (5.05-5.56 %)] was created inside the PLLA/NET-PEL20% (NEPEL20)group, which could restrain increase of total soluble solids (TSS), malonaldehyde content. The firmness, color luminosity (L*), total phenols, and ascorbic acid were maintained at higher level,and kept its commercial value after 40 days of storage. The present data indicated that treating post-harvest winter jujubes with NEPEL20 MAP packaging was an effective method for preservation of postharvest winter jujube.