Synergistic PVA/zein electrospun nanofiber array with curcumin-alizarin: a water-resistant, sensitive colorimetric platform for graded pork freshness monitoring.

Authors

Bingcan Liu, Siling Zhang, Honghui Geng, Can Hu, An Zhou, Zeyu Wu

Published in

Food chemistry: X. Volume 39. Pages 104591. Epub Oct 07, 2026.

Abstract

In this work, a synergistic polyvinyl alcohol (PVA)/zein electrospun nanofiber array was fabricated using curcumin and alizarin as dual responsive pigments for visual pork freshness monitoring. The water solubility of the PVA/zein composite reduced from 100.00% to 31.74%-35.42% (P < 0.05), exhibiting remarkably enhanced water resistance. The dual-pigment array displayed continuous color transitions from pH 4.0 to 11.0 and detected ammonia and dimethylamine at 1 ppm, whereas alizarin-only films needed 5 ppm. The total color difference (ΔE) of the array showed strong linear correlations with thiobarbituric acid reactive substances (TBARS, r = 0.98), pH (r = 0.95), and total volatile basic nitrogen (TVB-N, r = 0.98) in pork during refrigerated storage. Notably, the array enabled visual grading of pork freshness (fresh/sub-fresh/spoiled) and exhibited excellent color stability under ambient and refrigerated conditions. This study presents an eco-friendly and scalable intelligent packaging platform with great potential for real-time, on-site food freshness assessment.

PMID:
42898108
Bibliographic data and abstract were imported from PubMed on 20 Oct 2026.

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