| abstract |
The invention discloses a preparation method of attapulgite-based pH-responsive antibacterial material. In a stirring state, aldehyde natural antibacterial agent is directly sprayed on the surface of attapulgite powder, and then placed in a ball mill for grinding, and then placed in a stirring tank. Aqueous solution of chitosan-citric acid is sprayed; after spraying, stirring is continued for 30-120 min, and the obtained material is dried, sieved, and packaged. The invention utilizes the mechanochemical method to keep aldehyde substances in the attapulgite pores, and then spray chitosan solution on the surface of the attapulgite, so that the aldehyde substances react with chitosan to form a Schiff base, which overcomes the problem of aldehydes. Natural-like antibacterial agents are volatile and strong irritating odor, and at the same time, chitosan is used to impart pH responsiveness to antibacterial materials: under acidic conditions, chitosan amino groups are protonated, and antibacterial substances are not released, while in neutral and weak Under alkaline conditions, the Schiff base hydrolyzes continuously to release antibacterial substances, which can replace antibiotics for safe animal breeding. |