Abstract:To address the rapid degradation of aquatic products like scallops during storage and environmental pollution from traditional plastic packaging，this study prepared defatted rice bran carbon dots by the hydrothermal method，with defatted rice bran as the carbon source.Then，these carbon dots were applied as functional fillers into a gelatin-dextran film to construct a novel degradable active packaging film.According to scanning electron microscopy and infrared spectroscopy，the defatted rice bran carbon dots formed hydrogen bonds with the matrix polymer，contributing to the dense 3D network structure of the film.After adding defatted rice bran carbon dots，the film gained enhanced ultraviolet（UV）barrier，antioxidant，and antibacterial properties，water vapor barrier capacity，and mechanical strength.When 3% defatted rice bran carbon dots were added，the film's water vapor permeability was decreased by 33.54% while tensile strength was increased by 0.8 times.Antibacterial rates against Escherichia coli and Staphylococcus aureus were（62.79±3.51）% and（83.20±2.81）%，respectively，while DPPH and ABTS+ free radical scavenging rates were 67.30% and 89.50%，respectively.In a cold storage experiment for scallop adductor muscles，the film with 3% defatted rice bran carbon dots could inhibit increases in pH，thiobarbituric acid（TBA）value，total volatile basic nitrogen（TVB-N），and total colony count during storage and delay sensory quality deterioration，extending the shelf life from 3 days to 9 days.