Preparation method of crosslinked CQAs thin films and application thereof in piezoelectric sensors

The invention relates to the technical field of preparation of organic composite materials and preparation and application of piezoelectric devices, in particular to a preparation method of crosslinked CQAs thin films and an application thereof in piezoelectric sensors. The preparation method adopts CQAs and epichlorohydrin as raw materials, and prepares the crosslinked CQAs thin film by chemicalpreparation, heating in water bath and synthesis, dialysis and vacuum drying. The preparation method has the advantages of simple operation, easy regulation, accurate and detailed data, and good product purity up to 99.8%, excellent antibacterial performance, and more than 99% bactericidal rate against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and can be used as the antibacterial agent, flocculant, ion adsorbent, drug delivery carrier in the medical and health, water treatment, and pharmaceutical fields; in addition, the PVDF-TrFE sensor is prepared by a spin coating process, and the crosslinked