2results about How to "Many binding sites" patented technology

The invention discloses a bacteriostatic damp-proof aluminum foil composite film for packaging and a preparation method thereof, and belongs to the technical field of packaging materials. And connecting the outer layer with one side of the aluminum foil through an adhesive, connecting the other side of the aluminum foil with the heat sealing layer through an adhesive, and curing to obtain the antibacterial and damp-proof aluminum foil composite film for packaging. The preparation method of the adhesive comprises the following steps: taking a soft-segment main body, a hard-segment main body, a hydrophilic chain extender and a soft-segment modifier for prepolymerization, adding a short-chain chain extender and a long-chain chain extender, continuously stirring, adding a cross-linking agent, continuously stirring, cooling, adding a neutralizer, stirring, adding deionized water, and uniformly stirring and dispersing at a high speed to obtain a modified polyurethane emulsion; and uniformly mixing and dispersing the modified polyurethane emulsion, antibacterial particles, a wetting agent, a defoaming agent and an antioxidant to obtain the adhesive. The antibacterial particle is a coating particle which takes polyvinyl imidazole modified nano zinc oxide as a core and chitosan as a shell; the antibacterial and moisture-proof performance of the aluminum foil packaging film is improved.

The invention belongs to the technical field of glycerol detection devices in fermentation, food analysis, clinical medicine and bioengineering, and relates to a preparation method of a glycerol biosensor. Cuprous oxide is etched through sodium sulfide, a hollow cuprous sulfide nanocube with nanosheets stacked layer by layer on the surface is synthesized, the conductivity and active sites of the material are increased, and rich binding sites are provided for loading glycerol-3-phosphate oxidase and glycerol kinase. The nano material is fixed on a glassy carbon electrode, and glycerol-3-phosphate oxidase and glycerol kinase are dropwise added on the electrode, so that the glycerol biosensor with high performance is obtained. The method has the advantages of simple preparation process and low cost, has higher performance in real sample detection, can be used for large-scale production, and can realize real-time monitoring of glycerol in fermentation liquor.