Sensor label with polyaniline-metal composites for meat freshness monitoring

ABSTRACT

In this study, ion-track membranes with pore diameters of 2 ± 0.1 μm and a fluence of 10⁷ cm⁻², with a thin layer of gold sputtered on one side, were used for the electrochemical synthesis of thin films from a polyaniline (PANI) composite with gold (Au) or silver (Ag) nanoparticles. PET (polyethylene terephthalate ion-track membranes) films with the thin film of TM+PANI/Au and TM+PANI/Ag composites, featuring a developed microstructured surface, were designed. Using ATR-FTIR (Attenuated Total Reflection – Fourier-transform infrared spectroscopy) and Raman spectroscopy, it was determined that PANI was synthesised predominantly in the form of an emeraldine salt, with a minor presence of the emeraldine base form. The TM+PANI/Au and TM+PANI/Ag films exhibited high sensitivity to ammonia, with detection thresholds of approximately 40 mg/L and 20 mg/L, respectively.

KEYWORDS:

• Sensor label
• polyaniline-metal
• composites
• meat freshness
• monitoring

Acknowledgments

The application tests of “smart packaging” for storing poultry were conducted within the framework of the research project 5.6.1 “Study of the dynamics of migrations of food product components and environmental factors through biodegradable packaging” under task 5.6 “Research on the processes of creation and use of polymer packaging materials to ensure the quality and safety of food products” within the State Research Program “Agricultural Technologies and Food Security” for 2021-2025 (subprogram “Food Security”). (Reg. No. of the research project 20211155).

Disclosure statement

No potential conflict of interest was reported by the author(s).