A naked-eye detection polyvinyl alcohol/cellulose-based pH sensor for intelligent packaging

Metal Organic Frameworks Derived Sustainable Polyvinyl Alcohol/Starch Nanocomposite Films as Robust Materials for Packaging Applications

“…It is an ivory odourless and tasteless powder that can be easily physically or chemically mixed with other polymers. PVA is considered an environmental friendly food packaging material that shows excellent water absorption, is chemical and gas resistant, and has film-forming properties [ 9 ]. The incorporation of nanoparticles in PVA/starch blend films has enhanced the mechanical, thermal, and electrochemical properties remarkably [ 10 ].…”

pH‐sensitive polymers: Classification and some fine potential applications

“…For instance, this is the case of the food industry. In fact, recent studies suggest pH‐responsive polymeric films as smart packaging materials for real‐time food freshness monitoring 279‐281 . In addition, the designed pH‐responsive films exhibit antioxidant activity, 282,283 antimicrobial activity, 284,285 or both, 46,286 making them suitable for food preservation.…”

Food Sensors: Challenges and Opportunities

“…Both optical and electronic sensors are operated by submersion into the food, [23,24] sampling, [25] or absorption of gases released by the food. [26] Recent advances have focused on materials to immobilize and encapsulate color indicators into packaging materials, such as paper and polymer matrices, [27][28][29] and synthesis of sensors from food waste streams. [24,27] The literature indicates that the most popular pH indicators are naturally occurring compounds that can be extracted from fruits and vegetables including anthocyanins, [24,[30][31][32] litmus, [33] and cumerican.…”