Janus structure unidirectional antibacterial composite film material with humidity and pH dual response and preparation method and application thereof

Abstract

The application discloses a Janus structure one-way antibacterial composite film material with humidity and pH dual response and a preparation method and application thereof, and belongs to the technical field of antibacterial materials. The application first adopts a chitosan system and a cinnamon aldehyde ethanol solution to be stirred and mixed, then polyvinylpyrrolidone is added to obtain a hydrophilic inner layer spinning solution; then polycaprolactone is dissolved in a mixed solution of N,N-dimethylformamide and dichloromethane to obtain a hydrophobic outer layer spinning solution; then electrospinning is sequentially performed to obtain a composite film precursor with a double-layer nanofiber structure, and then hot pressing is performed to obtain a composite film, and then secondary electrospinning is performed, and finally the antibacterial composite film material of the application is obtained. The material has a Janus structure, the humidity / pH dual response of the hydrophilic layer is utilized to realize directional release of the antibacterial agent cinnamon aldehyde, polycaprolactone is used as the hydrophobic layer to ensure one-way delivery and barrier performance, the preparation process is simple and controllable, the antibacterial efficiency of the composite film is high, and the composite film can be used in fields such as fruit and vegetable preservation.

Images