Electrolytic bath for producing antibacterial metal coatings containing nickel, phosphorus and nanoparticles of an antibacterial metal (ni-p-manp's)

Abstract

The present invention proposes the use of an electrolytic bath to electroplate metal composites of nickel-phospohrous-metal nano-particles having antibacterial ability, which inhibits bacteria growing, such as Escherichia coli and Staphylococcus aureus , at least on 99% of its surface. The method of formulating an electrolytic bath allowing to obtain antibacterial coatings includes the following steps: a) adding p3+ ions to an electrolytic bath containing dissolved Ni salts, b) adding to the electrolytic bath metal nano-particles having antibacterial ability suspended in a cationic surfactant, c) electroplating the antibacterial composite metal of Ni—P-metal by applying a direct current density. The occlusion of metal nano-particles having antibacterial ability in the coating matrix provides it with antibacterial features.

1 - 9 . (canceled) 
     
     
         10 . A composition of electrolytic bath to electroplate a metal composite of Nickel-phosphorus-metal nano-particles of an antibacterial metal (Ni—P-MANPs), of the type commonly comprising the source of ions to be deposited and salts to make conductive the electrolytic bath, wherein said ion source to be deposited are nickel sulfamate tetrahydrate salts (Ni(SO3NH2)2.4H2O), Phosphorous acid (H3PO3) and antibacterial metal nano-particles, having as additives a buffering pH agent and a surfactant agent, the electrolytic bath having a pH between 2 and 5. 
     
     
         11 . The composition according to  claim 10 , wherein the source of Ni2+ ions is the nickel sulfamate tetrahydrate (Ni(SO3NH2)2.4H2O) at a concentration of 300 to 500 g/L. 
     
     
         12 . The composition according to  claim 11 , wherein the nickel sulfamate tetrahydrate (Ni(SO3NH2)2.4H2O) is at a concentration of 400 g/L 
     
     
         13 . The composition according to  claim 10 , wherein the phosphorous acid (H3PO3) is at a concentration of between 0.01 to 30.0 g/L. 
     
     
         14 . The composition according to  claim 13 , wherein the phosphorous acid (H3PO3) is at a concentration of 10.0 g/L. 
     
     
         15 . The composition according to  claim 10 , wherein the antibacterial metal nanoparticles are silver or copper nano-particles in a concentration between 3.0 and 10 g/L. 
     
     
         16 . The composition according to  claim 15 , wherein the size of the antibacterial metal nano-particles is between 10 to 100 nanometers. 
     
     
         17 . The composition according to  claim 16 , wherein the size of the antibacterial metal nano-particles is 60 nanometers. 
     
     
         18 . The composition according to  claim 10 , wherein the pH buffering agent is boric acid (H3BO3). 
     
     
         19 . The composition according to  claim 18 , wherein the boric acid (H3BO3) is at a concentration of between 8.5 to 45.0 g/L. 
     
     
         20 . The composition according to  claim 19 , wherein the boric acid (H3BO3) is at a concentration of 9.5 g/L. 
     
     
         21 . The composition according to  claim 10 , wherein the surfactant is of the cationic type. 
     
     
         22 . The composition according to  claim 21 , wherein the surfactant is selected from ammonium cetyl trimethyl hydrogensulfate, decyl trymethyl ammonium bromide, or sodium dodecyl sulfate. 
     
     
         23 . The composition according to  claim 21 , wherein the surfactant agent is at a concentration between 0.09 and 3.81 g/L. 
     
     
         24 . The composition according to  claim 23 , wherein the surfactant agent is at a concentration of 0.2 g/L.