摘要
为改善聚乙烯醇(polyvinyl alcohol,PVA)基包装膜透气性及机械性能,进而增加其在食用菌保鲜领域的应用价值,本实验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,并以市售聚乙烯(polyethylene,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膜相比,其包装贮藏双孢菇CO2透过率分别降低35.66%和12.58%,水蒸气透过量分别降低9.05%和13.96%,抗拉强度、断裂伸长率和杨氏模量分别增加23.86%、1.59%、72.89%和23.41%、0.84%、96.24%。贮藏5 d后,1%SiO2和1%TiO2纳米复合膜包装比纯PVA膜包装双孢菇的质量损失率分别减少31.06%和32.87%;1%SiO2、1%TiO2纳米复合膜处理的双孢菇硬度较PE包装膜组低13.16%、13.05%;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。因此,1%SiO2/TiO2纳米粒子的添加可以改善PVA包装膜的机械和保鲜性能。
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.
作者
马清华
蔡铭
谢春芳
杨开
孙培龙
MA Qinghua;CAI Ming;XIE Chunfang;YANG Kai;SUN Peilong(College of Food Science and Technology,Zhejiang University of Technology,Hangzhou 310014,China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2020年第9期182-187,共6页
Food Science
基金
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)。
关键词
双孢菇
聚乙烯醇
纳米包装膜
贮藏效果
Agaricus bisporus
polyvinyl alcohol
nanocomposite films
preservation effect
作者简介
第一作者:马清华(1993-)(ORCID:0000-0002-7301-8258),女,硕士,研究方向为农产品加工与贮藏。E-mail:191901612@qq.com;通信作者:蔡铭(1979-)(ORCID:0000-0003-0782-9877),男,副教授,博士,研究方向为农产品加工与贮藏。E-mail:caiming@zjut.edu.cn。
