Food and Fermentation Industries >

2025 , Vol. 51 >Issue 7: 220 - 227

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.039577

Preparation of grape skin red-loaded microencapsulated pH indicator film and its application in shrimp freshness monitoring

  • ZHAO Zhenghe ,
  • LIU Honglin ,
  • TANG Junyang ,
  • JIANG Chunyan ,
  • CHENG Ying ,
  • HE Binbin ,
  • CHEN Saiyan
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  • (College of Food Science, Sichuan Agricultural University, Ya’an 625014, China)

Received date: 2024-04-16

  Revised date: 2024-06-09

  Online published: 2025-04-29

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Abstract

To enhance the stability of natural anthocyanins in the indicator membranes, grape-skin red (GSR) synthetic microcapsules were embedded with gelatin (GEL) and chitosan (CS) as wall materials and incorporated into potato starch (PS) and peanut shell cellulose (PSC) to prepare PS/PSC GEL/GSR/CS indicator films.The film properties were tested and analyzed, and the indicator films were applied in freshness monitoring of South American white shrimp.The results showed that when microencapsulation, peanut shell cellulose, and potato starch were used to prepare the composite film in the mass ratio of 2∶3∶50, the film was relative to the PS/PSC/GSR film, and the grapheme-red microencapsulation could increase the tensile strength of the indicator film from 11.95 MPa to 13.25 MPa, and the melting point was increased by 11 ℃, and the film could be stored at 4 ℃ (refrigerated), protected from light, and in 30% RH environment.It could be stored at 4 ℃ (refrigerated), protected from light and 30% RH for 15 days without obvious color difference and showed very high pH color response.The indicator film in the South American white shrimp freshness monitoring to verify the applicability of the color of the indicator film with the shrimp deterioration showed red-gray-yellow changes, the shrimp volatile saline nitrogen and other corruption index changes with the indicator film chromaticity value changes in the same trend, the color difference was visible, and would be extended for two days of color stability.Therefore, the freshness indicator film has high stability and has a promising application in the food field.

Key words： pH indicator film; microencapsulation; grape skin red; potato starch; shrimp freshness

Cite this article

ZHAO Zhenghe , LIU Honglin , TANG Junyang , JIANG Chunyan , CHENG Ying , HE Binbin , CHEN Saiyan . Preparation of grape skin red-loaded microencapsulated pH indicator film and its application in shrimp freshness monitoring[J]. Food and Fermentation Industries, 2025 , 51(7) : 220 -227 . DOI: 10.13995/j.cnki.11-1802/ts.039577

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