Nghiên cứu chế tạo màng Chitosan/SiO2/Anthocyanin để chỉ thị chất lượng tôm tươi trong quá trình bảo quản

Abstract

In this study, a pH-responsive color indicator film of chitosan/nano-SiO₂ contained anthocyanin (ACN). Chitosan and nano-SiO₂ were recovered from shrimp shells and rice husks, respectively; anthocyanin was extracted from dragon fruit shells. Among the obtained samples, the composite film with a CTS/SiO₂/ACN ratio of 10:1.5:8 had the best physical and mechanical properties with an average thickness of 0.22 ± 0.08 mm, tensile strength of 0.59 ± 0.03 MPa and swelling of ~320% after 10 minutes. The obtained film contained a pH-responsive color indicator and was used to monitor the quality changes of fresh shrimp stored for 30 h at room temperature. The results showed that the resulting indicator film had good sensitivity, indicating a promising direction for product application in identifying the quality of fresh shrimp during storage.

Keywords: Chitosan, nano-SiO₂, Anthocyanin, indicative film, fresh shrimp storage