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Copy of Nanotechnology in Dairy Products
Transcript of Copy of Nanotechnology in Dairy Products
WHY WE NEED TO APPLY
The manipulation of matter with at least one dimension sized from 1 to 100 nanometers.
FIELDS OF NANOTECHS
WHY MILK IS GOOD FOR US?
intro & conclusion
Importance of packaging
& Milk products
Previous methods in
the packaging of milk
The mechanism of
Advantages & disadvantages of nano-technology
Prevents the product from being contaminated by airborne micro-organisms.
Importance Of Packaging
As aseptic shelf-safe cartons, for milk, to be delivered over long distances without refrigeration or preservatives.
(packaged in a modified atmosphere with a novel palladium-based oxygen removing catalyst and stored for eight weeks at 50°C.)
Example Of Milk Packaging
Other types of packaging
Milk is an important and significant source of protein, vitamin and mineral.
Dairy products provide calcium, which is essential for bone growth and development.
In 1884, Doctor Hervey Thatcher, an American inventor from New York, invented the first glass milk bottle, called 'Thatcher's Common Sense Milk Jar', which was sealed with a waxed paper disk.
1932 - Plastic-coated paper milk cartons were introduced commercially.
Mid 1950s - Cardboard tops were banned because it was said unhygienic in some locations.
Lengthen shelf life of milk products
Nanoemulsion technology can be used to decontaminate food packaging equipment.
Better antimicrobial effects.
Advantage of Nano-packaging compared to previous packaging
Nano food packaging materials may extend food life, improve food safety, alert consumers that food is contaminated or spoiled, repair tears in packaging, and even release preservatives to extend the life of the food in the package.
One reason: SURFACE AREA!
Another reason is NANOMATERIAL behave differently from bulk materials of the same chemical.
Think about it this way:
Which dissolves faster in your coffee?
Communicate the quality of the food within the package through devices either incorporated in the packaging or attached to the packaging.
Potential NANOSENSORS could indicate
Right on the package!
A TEASPOON OF
Electrical conductivity etc.
Nano-scaled additives in polymers; Potential increased performance
Nanocomposite coating on the packaging material is designed for interaction/reaction with the food
Reduction of the oxygen level in the packaging
Preserving agent or addition of flavourings
Nanotechnology and active food packaging materials
Few disadvantages is associated with the incorporation of nanoparticles.
Nanocomposites is more expensive - but this is changing.
Not fully control over the consequences of nanoparticles on the environment and human.
(Christop Meilli, Lebensmittel‐Technologie (6/2008), pages 24‐26)
In terms of Food safety:
Nano inside = nanotechnology directly comes into the consumer stomach via food products.
most packaging, nanoparticles are integrated into a matrix and therefore are immobile, except;
Active packaging: particles can migrate into the food products.