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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: 4, Interesting) by opinionated_science on Thursday August 06 2015, @06:02PM
It doesn't taste grassy, it *is* grass - minute quantities of the chlorophyll probably...but milk is the result of microbial metabolism so 100% conversions is not guaranteed. A possibly more important point is that unpasteurised milk has many protein complexes that a destroyed on heating. There is active research trying to assess the difference, from the point of view of maternal milk vs other mammalian milks that have been treated.