The invention discloses an antibacterial
antioxidant composite film, and a preparation method and application thereof. The
composite film successively comprises, from exterior to interior, a PET layer, an antibacterial layer and an
antioxidant layer, wherein the antibacterial layer contains a mesoporous nanometer silica supported silver-series
antibacterial agent, and the
antioxidant layer contains a mesoporous nanometer silica supported anti-oxidant. The invention has the following beneficial effects: (1) mesoporous nanometer silica with special morphology is prepared by using a
sol-gel process and is used as
a site for providing support to the silver-series
antibacterial agent and the anti-oxidant, so long-acting and wide-spectrum
efficacy of effective factors are guaranteed, stable release of the effective factors is guaranteed, and unfavorable influence caused by burst of
drug effect is prevented; (2) the
composite film provided by the invention overcomes the shortcomings that the silver-series
antibacterial agent is prone to oxidation
stain and that silver ions are separated out when the silver-series antibacterial agent encounters water, so the effective antibacterial period of the composite film is prolonged, and the security and hear resistance of the composite film are enhanced; and (3) since the composite film successively comprises, from exterior to interior, the PET layer, the antibacterial layer and the antioxidant layer, the service life of the composite film is prolonged.