• 包装贮运 •

### 聚乙烯醇基SiO2/TiO2纳米包装膜制备及对双孢菇保鲜效果

1. （浙江工业大学食品科学与工程学院，浙江 杭州 310014）
• 出版日期:2020-05-15 发布日期:2020-05-15
• 基金资助:
浙江省重点研发项目（2019C02100）；国家自然科学基金青年科学基金项目（31401506）

### Evaluation of Polyvinyl Alcohol-Based SiO2/TiO2 Nanocomposite Films and Their Preservation Effect on Agaricus bisporus

MA Qinghua, CAI Ming, XIE Chunfang, YANG Kai, SUN Peilong

1. (College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, China)
• Online:2020-05-15 Published:2020-05-15

Abstract: In this study, modified polyvinyl alcohol (PVA) films added separately with nano SiO2 and nano TiO2 at different concentrations were prepared to improve the mechanical properties and permeability and broaden the application of PVA films in the field of edible mushroom preservation. The effect of these nano films on preserving the quality of Agaricus bisporus was evaluated by measuring mass loss, hardness, whiteness and sensory evaluation and compared with that of commercial polyethylene (PE) film. Results showed when nano SiO2/TiO2 were added at 1%, the CO2 permeability decreased by 35.66% and 12.58%, respectively, and the water vapor permeability decreased by 9.05% and 13.96%, 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, the percentage mass loss of Agaricus bisporus packed with the 1% nano SiO2 and 1% nano TiO2 incorporated films decreased by 31.06% and 32.87% as compared with pure PVA films, respectively, and the hardness decreased by 13.16% and 13.05% as compared with PE films, respectively. In addition, the whiteness of Agaricus bisporus packed with the 1% nano TiO2 incorporated film was the highest, 86.18. According to the sensory indicators including the opening degree of caps, color, hardness and odor, the 1% nano TiO2 incorporated film showed a better preservation effect on Agaricus bisporus. Therefore, incorporation of 1% nano SiO2/TiO2 could improve the mechanical properties and preservation effect of PVA films.