Food and Fermentation Industries >

2021 , Vol. 47 >Issue 5: 127 - 132

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.025231

Preparation and application of polyvinyl alcohol/silicon dioxide/cinnamaldehyde composite film

  • GAO Hongfang
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  • (School of Agriculture and Forestry Technology, Weinan Vocational & Technical College, Weinan 714026, China)

Received date: 2020-07-31

  Revised date: 2020-10-12

  Online published: 2021-03-31

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Abstract

In order to develop a new type of food packaging material, the polyvinyl alcohol(PVA)-based composite film (PVA-CIN-Si) by the addition of CIN and nano-silica (n-SiO2) was prepared. And the effect of the composite film on the preservation of cherry tomatoes was studied. The microscopic results of the films were analyzed by scanning electron microscope (SEM), infrared spectroscopy (FTIR) and thermogravimetric analyzer (TGA). SEM analysis showed that n-SiO2 was uniformly dispersed in the film, filled the voids formed by CIN and made the microstructure of the film more compact. Moreover, weak hydrogen bonds between the PVA and SiO2 were investigated by FTIR, which formed physical crosslinks and improved the mechanical properties of the composite film. Furthermore, TGA analysis showed that the addition of n-SiO2 efficiently improved the thermal stability of the composite film. In addition, the fresh-keeping test results showed that the PVA-CIN-Si film decreased the Vc loss. On the 14th day, the decay rate and weight loss rate were 26% and 8.7%, respectively. The composite film effectively maintained the quality of cherry tomatoes and extended the storage time by 6 days. This study provided a certain theoretical basis for the preparation of environment-friendly packaging film and its application in the preservation of fruits and vegetables.

Key words： polyvinyl alcohol; nano-silica; cinnamaldehyde; cherry tomato; preservation

Cite this article

GAO Hongfang . Preparation and application of polyvinyl alcohol/silicon dioxide/cinnamaldehyde composite film[J]. Food and Fermentation Industries, 2021 , 47(5) : 127 -132 . DOI: 10.13995/j.cnki.11-1802/ts.025231

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