Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2021
Sensor coating employed to preliminarily evaluate the banana ripeness
Abstract
Abstract Herein, a new Schiff-base interaction coating material for fruit preservation and sensing was successfully fabricated. The new material was characterized by Fourier transform infrared (FTIR) spectra, contact angle (CA), 3-D reconstruction, and so on. Combined with the gas barrier performance and the evaluation of fruit quality, including weight loss, firmness, and iodine-starch-system test; CD-0 (coating fabricated with Chitosan and dialdehyde starch) film and CD-0.4 film could delay fruit ripening effectively. Cracks caused by volatile l -menthol crystals in CD-0.1 and CD-0.2 coatings accelerated physiological activities of banana. Trend in electromechanical performance monitored by CD-Al sensor were consistent with the respiration rate and ethylene production. Therefore, the CD-0 film and coatings containing l -menthol is not only an excellent material to extend the shelf-time of banana but also a sensing material to construct CD-Al sensor. This type of gas-film-Al sensor provides a promising approach for low-cost and portable sensing devices.