Consumers may soon be able to go for longer between milk-buying trips. That's because Brazilian company Agrindus hopes to start marketing plastic milk bottles that use embedded silver nanoparticles to kill bacteria. Grade A pasteurized fresh whole milk packaged in those bottles can reportedly last for up to 15 days, as opposed to the usual seven.
The technology was developed by partner company Nanox, and involves first coating silica ceramic particles with silver nanoparticles. This reportedly has a synergistic effect, with the silica boosting the antimicrobial properties of the silver.
Those coated particles take the form of a powder that is subsequently mixed into liquid polyethylene. Using blow- or injection-molding, that plastic is then made into bottles which Agrindus plans to sell to dairy goods companies. The particles can also be used to make milk bags, which should extend shelf life from four to 10 days.
(Score: 0) by Anonymous Coward on Thursday August 06 2015, @09:17AM
If you were polishing because of the black oxidation, then it's just a lack of knowledge. The black oxidation is easily removed by putting the silver onto some aluminium (like aluminium foil) in salted water. And then you just wait. As a bonus, unlike with polishing, you don't remove some of the silver that way.
I'm not sure if it would work out with the connectors, though (it certainly wouldn't affect the copper, but probably the salted water would cause other problems).