聚乙烯醇基SiO2/TiO2纳米包装膜及对双孢菇保鲜效果

摘要/Abstract

摘要： 本研究制备了添加不同质量分数SiO2/TiO2纳米粒子的聚乙烯醇（polyvinyl alcohol，PVA）基纳米复合膜，以改善其透气性及机械性能，进而增加聚乙烯醇基包装膜在食用菌保鲜领域的应用价值。以市售PE膜为对照，以质量损失率、硬度、白度和感官评价等为指标，探讨6 种纳米复合膜对双孢菇的保鲜效果。结果表明：SiO2和TiO2纳米粒子添加量为1%时，较纯PVA膜其CO2透过率分别降低12.58%和35.66%，水蒸气透过量分别降低5.94%和8.9 2%；抗拉强度、断裂伸长率和杨氏模量分别增加23.86%和23.41%，1.59%和0.84%，72.89%和96.24%。贮藏5 d后，1% SiO2和1% TiO2纳米复合膜比纯PVA包装贮藏的双孢菇的质量损失率分别减少31.06%和32.87%；1% SiO2、2% SiO2和1% TiO2纳米复合膜处理的双孢菇较纯PVA及PE包装膜硬度值变化小，分别达到228.04 g、232.19 g和227.81 g；此外，经1% TiO2纳米复合膜处理的双孢菇具有更高的白度，达86.18。通过开伞程度、颜色、硬度和气味等感官指标评定，1% TiO2纳米复合膜具有更好的保鲜效果。

关键词: 双孢菇, 聚乙烯醇, 纳米包装膜, 贮藏效果

Abstract: In this study, modified polyvinyl alcohol (PVA) films added of nano SiO2/TiO2 at different concentrations were prepared to improve the physical properties and broaden the application of PVA films in fresh-keeping filds. Storage effects of these nano films on Agaricus bisporus were evaluated and compared with polyethylene (PE) film. Results showed when nano SiO2/TiO2 were added at 1%, the transmittance of CO2 decreased by 12.58% and 35.66%, respectively, while permeation of H2O decreased by 5.94% and 8.92%, respectively. The tensile strength, elongation at break and Young's modulus increased by 23.86% and 23.41%, 1.59% and 0.84%, and 72.89% and 96.24%, respectively. After 5 days of storage, weight loss of Agaricus bisporus packed with 1% SiO2 and 1% TiO2 films increased by 31.06% and 32.87% of PVA films, respectively. Hardness of Agaricus bisporus packed with 1% SiO2, 2% SiO2 and 1% TiO2 films reduced to 228.04 g, 232.19 g and 227.81 g, respectively. In addition, whiteness treated with 1% TiO2 film was the highest. According to the sensory indicators, 1% TiO2 film showed better preservation effects on Agaricus bisporus.

Key words: Agaricus bisporus, polyvinyl alcohol, nanocomposite films, storage effect

中图分类号:

TS255.3

马清华蔡铭谢春芳杨开孙培龙. 聚乙烯醇基SiO2/TiO2纳米包装膜及对双孢菇保鲜效果[J]. 食品科学, 0, (): 0-0.

Qing-Hua MA Ming Cai Chun-Fang XIE Kai Yang. Evaluation of PVA-based SiO2/TiO2 Nanocomposite Films and Their Preservation Effect on Agaricus bisporus[J]. FOOD SCIENCE, 0, (): 0-0.

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