3D-printed flexible sensors for food monitoring

In recent years, the convergence of 3D printing technology and flexible sensors has played a crucial role in various fields, particularly in industrial production. The widespread development of 3D printing technology and flexible sensors has become more evident, with a specific focus on food analysis and monitoring, which is closely linked to human health. The utilization of 3D-printed flexible sensors in the realm of food analysis and monitoring offers flexibility, adaptability, and high sensitivity. These sensors enable real-time monitoring and accurate detection, providing cost-effective solutions for ensuring food safety. This review begins by analyzing the advantages of the 3D printing process in fabricating flexible sensors, followed by an introduction to the benefits of 3D printing materials and hydrogel materials in sensor fabrication. Subsequently, the review delves into the detailed discussion of food monitoring applications, specifically the monitoring of gases, microorganisms, and non-gaseous compounds in food. Each application is thoroughly analyzed, considering its advantages, disadvantages, and potential scenarios.