Glycerol-Based Dendrimer Nanocomposite Film as a Tunable pH-Sensor for Food Packaging

Area of Science:

• Materials Science
• Food Science
• Chemical Engineering

Background:

• Significant food waste occurs due to consumer confusion over date labels on food packaging.
• Current spoilage detection methods using films often lack sensitivity and real-time monitoring capabilities.

Purpose of the Study:

• To synthesize a glycerol-based nanocomposite core-shell latex film for sensitive, real-time pH detection of food spoilage.
• To develop an intelligent food packaging material to reduce food waste.

Main Methods:

• Synthesized a pH-responsive dendrimer comonomer from glycerol and diamine.
• Utilized miniemulsion polymerization to create a core-shell structure with tunable nanoshell thickness.
• Encapsulated a color-indicative dye within the flexible film for visible pH change detection.

Main Results:

• Developed a nanocomposite film capable of real-time pH detection with high sensitivity (<0.5 pH change).
• The film exhibits visible color changes correlating with pH drop and time elapsed, indicating spoilage.
• The material demonstrated barrier properties against water and heat, and resisted deformation.

Conclusions:

• The synthesized nanocomposite flexible film functions as a pH sensor for intelligent food packaging.
• This material offers a universal, accurate, and user-friendly system for real-time food spoilage monitoring.
• The developed technology has the potential to significantly reduce food waste in the supply chain.