A visual ratio PVA/curcumin/indigo nanofibre membrane based on natural pigments for detecting mutton freshness

• DOI: 10.1111/ijfs.17313
• Publication Date: 2024-06-25T16:39:10Z
• Authors: Lianye Li; Wenbo Li; Wuliang Sun; Yue Dong; Yaxin Yv; Wanting Shi; Wenxiu Sun
• Keywords: Polyvinyl Alcohol; Naked eye

Summary In the storage process, meat is susceptible to external factors that produce corruption and deterioration, affecting consumers' health. Therefore, preparing an indicator membrane can detect freshness in real time, non‐destructively, visually significant. Herein, was prepared by electrostatic spinning technology using polyvinyl alcohol (PVA) as substrate curcumin (CUR) indigo (IND) mixed for detection. When were at 3:1 (w/w), CUR transformed from ketone type enol with gradual increase of pH, IND underwent electron leaps, which resulted green, brown, reddish‐brown colour changes solution, development effect effectively improved. The characterisation results showed average fibre diameter PVA/0.8 252 nm, hybrid successfully loaded nanofibres, water contact angle 103.6°, hydrophobic. addition, sensitive trimethylamine (limit detection 17.38 ppm) triethylamine 27.77 but insensitive saline, ethanol, ethyl acetate, other contaminants specificity. Finally, indicating green brown during mutton rotten, naked eye judge mutton. PVA/CUR/IND has excellent potential application real‐time non‐destructive freshness.