37results about How to "Achieve long-lasting antibacterial effect" patented technology

The invention relates to the technical field of building decoration materials, and provides a processing technology for stone composite boards, which includes the following steps: (1) polishing both sides of marble to make the surface of the marble have a certain roughness, and then cleaning and drying the marble; (2) Apply adhesive on one side of the marble, and then bond the substrate on this surface of the marble; (3) Repeat step (2) on the other side of the marble; (4) Cut in half from the middle of the marble , forming two identical semi-finished stone composite boards; (5) coating the cut surface of the marble with an anti-slip composition, and performing fine grinding and polishing on the coated surface to obtain a stone composite board. It solves the problem that the function of the stone composite board made of existing marble is relatively single.

The invention discloses a functionalized graphene oxide bacteriostatic material and a preparation method thereof. The method comprises the following steps that 1, graphene oxide, ammonium halide and a catalyst beneficial for esterification are added into an organic solvent to fully react at the temperature of 50 DEG C to 100 DEG C under the stirring condition, then the reaction products are centrifuged, supernatant is discarded, solids are collected after subnatant is subjected to water washing and alcohol washing, and freeze drying is conducted to obtain substance A, wherein the oxygen content of graphene oxide is 20%-50%, and carboxyl accounts for 15% of the total oxygen content; 2, the substance A and a sodium hypochlorite solution are mixed to be uniform according to the mass ratio of 1:(2-100) and fully react at the temperature of 25 DEG C-50 DEG C under the stirring condition, and reaction products are subjected to water washing and freeze drying to obtain the functionalized graphene oxide bacteriostatic material. According to the method, a synergistic antibacterial agent is grafted onto graphene oxide by taking graphene oxide as a substrate, and the prepared product not only has the antibacterial property of graphene but also has the additional antibacterial property of ammonium halide.

The invention relates to a method for preparing a polyurethane-nanosilver long-acting antibacterial film by a post-heat treatment modification method, which includes the following steps: (1) diisocyanate and polytetrahydrofuran are mixed to react; a cross-linking agent and an acetone solution of a chain extender are added, dimethylolpropionic acid and a catalyst are added, reaction takes place, and thereby PU (polyurethane) is obtained; a dimethylformamide solution of silver nitrate is added into a polyurethane solution, a film is formed after uniform stirring, heat treatment is carried out, and thereby a polyurethane-nanosilver film is obtained; (2) 4,4'-dihydroxybenzophenone reacts with long-chain alkyl halide, so that 4,4'-bis-long-chain alkoxy benzophenone is obtained; the 4,4'-bis-long-chain alkoxy benzophenone reacts with hydrazine hydrate, so that 4,4'-bis-long-chain alkoxy benzophenone hydrazone is obtained; and the 4,4'-bis-long-chain alkoxy benzophenone hydrazone undergoes oxidation reaction, so that long-chain alkyl diazomethane is obtained; (3) the long-chain alkyl diazomethane is dissolved into a solvent, and is uniformly applied onto the surface of the polyurethane-nanosilver film, and after heat treatment, the polyurethane-nanosilver long-acting antibacterial film is obtained. The method can be used for realizing long-acting bacteria resistance.

The invention discloses a long-acting antibacterial latex mattress and a preparation method thereof, by loading nano-silver on nano-mesoporous TiO 2 inside the pores, and on the nano-TiO 2 Perform quaternization to prepare an antibacterial agent with excellent antibacterial effect and slow-release effect; and use the prepared antibacterial agent in the two processes of preparation and finishing of latex mattresses to obtain latex with long-lasting antibacterial effect Mattress. Through the above method, the present invention can make nano-silver loaded on nano-mesoporous TiO 2 The holes can play a slow-release effect and ensure the continuous and stable output of antibacterial ingredients; the present invention can also make nano-mesoporous TiO 2 It has the antibacterial effect of quaternary ammonium salt, thereby effectively improving the antibacterial effect of antibacterial agents. At the same time, by finishing the latex mattress, the present invention can not only load more antibacterial ingredients on the surface of the mattress, improve the antibacterial effect; but also reduce the antibacterial ingredients on the surface of the mattress, prolong the time of antibacterial action, thereby achieving long-acting antibacterial Effect.

The invention relates to the technical field of paint protection films, in particular to an antibacterial paint protection film. The paint protection film includes a transparent support, and a self-healing antibacterial protection film is sequentially arranged on an optical surface of the transparent support. layer and a transparent release film; an assembly glue and a translucent release film are sequentially arranged on the other optical surface of the transparent support. The self-healing antibacterial protective layer is formed by heating and curing after being coated with a self-healing antibacterial coating liquid. The self-healing antibacterial coating liquid protects the self-healing main resin, and the self-healing main resin has a hydroxyl value in the range of 120mgKOH / g~140mgKOH / g and two resins with hydroxyl value in the range of 50mgKOH / g~70mgKOH / g are mixed, and the mixing ratio is (7~9):(1~3). It can effectively fight against Escherichia coli and Staphylococcus aureus, and the self-healing layer has good penetration resistance.

The invention relates to a method for preparing a polyurethane-nano silver long-lasting antimicrobial film by a modification method after ultraviolet-irradiation. The method comprises the steps: (1) conducting a mixed reaction of diisocyanate and polytetrahydrofuran; adding an acetone solution containing a cross-linking agent and a chain extender, adding dimethylol propionic acid and a catalyst to react, and obtaining PU; adding a dimethylformamide solution of silver nitrate to a polyurethane solution, stirring evenly to form a film, conducting heat treatment, and obtaining a polyurethane-nano silver film; (2) reacting 4,4'-dihydroxybenzophenone with long chain haloalkane, and obtaining 4,4'-double-long chain alkoxy benzophenone; reacting the 4,4'-double-long chain alkoxy benzophenone with hydrazine hydrate, and obtaining 4,4'-double-long chain alkoxy benzophenone hydrazone; conducting oxidizing reaction on the 4,4'-double-long chain alkoxy benzophenone hydrazone, and obtaining long chain alkyl diazomethane; (3 ) dissolving the long-chain alkyl diazomethane in solvent, spraying on the surface of the polyurethane-nano-silver film, after ultraviolet-irradiation, and obtaining the product. The invention can achieve long-term anti-microbial.

The invention discloses a slow-release antibacterial and absorbable medical suture. The raw materials include: 80-100 parts of carboxymethyl chitosan, 10-15 parts of red sea bream skin collagen, and 8-12 parts of grass carp collagen. , 10‑20 parts of pig bone collagen, 1‑3 parts of mannitol, 1‑3 parts of epoxidized soybean oil, 1‑3 parts of glycerin, 2‑3 parts of vanillin, 1‑2 parts of genipin, diisopropyl 2‑4 parts of carbodiimide, 0.5‑1 part of aldylated starch, and 1‑5 parts of paint. The invention also discloses a preparation method of the slow-release antibacterial absorbable medical suture, which includes the following steps: S1, preparing suture fiber; S2, preparing a coating solution; S3, coating weaving. The invention has good antibacterial performance, long-term antibacterial ability, good compatibility with biological tissues, easy adhesion and reproduction of cells on the invention, simple operation, less environmental pollution, and is beneficial to industrial production.