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Part of a series of educational presentations. This presentation is Phase 4: Nanotechnology

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  1. 1. © CommNet 2013 Nanotechnology
  2. 2. © CommNet 2013 Objec&ves: To define nanotechnology. To understand the basic scien=fic principles of nanotechnology.
  3. 3. © CommNet 2013 A nanometer (nm) is one-billionth of a metre, smaller than the wavelength of visible light and a hundred-thousandth the width of a human hair. What is nanotechnology? Nanotechnology deals with anything measuring between 1 and 100 nm. Nanotechnology is the ability to create and manipulate atoms and molecules on the smallest of scales. ‘Nano’ comes from the Greek word for dwarf.
  4. 4. © CommNet 2013 There are a number of products available that are already benefi=ng from nanotechnology. Using sunscreen as an example, many of them contain nanopar=cles of zinc oxide or =tanium oxide. Older sunscreen formulas use larger par=cles, which is what gives most sunscreens their whi=sh color. Smaller par=cles are less visible, so when the sunscreen is rubbed into the skin, it doesn't leave a whi=sh =nge.
  5. 5. © CommNet 2013 Others include: •  mobile phone touch screens; •  cosme=cs; •  tennis rackets; •  bicycles; •  fabric; •  computer technology.
  6. 6. © CommNet 2013 Nanotechnology offers a wide range of opportuni=es for the development of innova=ve products and applica=ons for food packaging. Nanotechnology and nanomaterials are a natural part of food processing and conven=onal foods, because the characteris=c proper=es of many foods rely on nanometer sized components (such as nanoemulsions and foams).
  7. 7. © CommNet 2013 ‘Nano’ foods now All foods contain nanopar=cles. Examples of foods that contain nanopar=cles include milk and meat. Milk contains caseins, a form of milk protein present at the nanoscale. Meat is made up of protein filaments that are much less than 100nm thin. The organisa=on and change to the structures of these affects the texture and proper=es of the milk or meat.
  8. 8. © CommNet 2013 Uses for nanotechnology in food •  nanocarrier systems for delivery of nutrients and supplements; •  organic nano-sized addi=ves for food, supplements and animal feed; Nanotechnologies are being developed all the =me. Here are some examples that are being used:
  9. 9. © CommNet 2013 •  food packaging applica=ons e.g. plas=c polymers containing or coated with nanomaterials for improved mechanical or func=onal proper=es; •  nanocoa=ngs on food contact surfaces for barrier or an=microbial proper=es; •  nano-sized agrochemicals (a chemical used in agriculture, such as a pes=cide or a fer=lizer.); •  nanosensors for food labelling.
  10. 10. © CommNet 2013 Nanopar=cles are being used to deliver vitamins or other nutrients in food and drinks without affec=ng the taste or appearance. These nanopar=cles encapsulate the nutrients and carry them through the stomach into the bloodstream. Food examples Nanopar=cle emulsions are being used in ice cream and various spreads to improve the texture and uniformity.
  11. 11. © CommNet 2013 New developments in nanoscience and nanotechnology will allow more control and have the poten=al of increased benefits. These include: •  healthier foods (e.g. lower fat, lower salt) with desirable sensory proper=es; •  ingredients with improved proper=es; •  poten=al for removal of certain addi=ves without loss of stability; •  smart-aids for processing foods to remove allergens such as peanut protein. Food examples
  12. 12. © CommNet 2013 Packaging examples Researches have produced smart packages that can tell consumers about the freshness of milk or meat. When oxida=on occurs in the package, nanopar=cles indicates the colour change and the consumer can see if the product is fresh or not. Incorpora=on of nanopar=cles in packaging can increase the barrier to oxygen and slow down degrada=on of food during storage.
  13. 13. © CommNet 2013 Bo[les made with nanocomposites minimise the leakage of carbon dioxide out of the bo[le. This increases the shelf life of fizzy drinks without having to use heavier glass bo[les or more expensive cans. Food storage bins have silver nanopar=cles embedded in the plas=c. The silver nanopar=cles kill bacteria from any food previously stored in the bins, minimising harmful bacteria. Packaging examples
  14. 14. © CommNet 2013 Gecko feet are covered with nano-size hairs that use intermolecular forces, allowing the lizards to s=ck firmly to surfaces. By replica=ng this scien=sts have developed an adhesive that can seal wounds or patch a hole caused by a stomach ulcer. The adhesive is elas=c, waterproof and made of material that breaks down as the injury heals. Nano in nature
  15. 15. © CommNet 2013 The contribu=on of nanoscience research in agriculture and food will be in the following areas: •  food safety and biosecurity; •  material science; •  food processing and product development.
  16. 16. © CommNet 2013 Applica&ons of nanotechnology Agriculture Processing Products Nutri&on New pes=cides Microencapsula=on of flavours/aromas UV protec=on Neutraceu=cals Gene=c engineering Gela=on agents An=microbials Nutrient delivery Iden=ty preserva=on Nano emulsions Condi=on and abuse monitors Mineral/vitamin for=fica=on Sensors to measure soil condi=ons An=-caking High barrier plas=cs Drinking water purifica=on Sanita=on of equipment Security/an= counterfei=ng Sensory characteris=cs of supplements Contaminant sensors
  17. 17. © CommNet 2013 The future of nanotechnology Research is being carried out to develop nanocapsules containing nutrients that would be released when nanosensors detect a deficiency in your body. Nanomaterials are being developed to improve the taste, colour, and texture of foods. For example “interac=ve” foods are being developed that would allow you to choose which flavour and colour a food has!
  18. 18. © CommNet 2013 Modern biotechnologies involve making useful products from whole organisms or parts of organisms, such as molecules, cells, =ssues and organs. Recent developments in biotechnology include gene=cally modified plants and animals, cell therapies and nanotechnology. These products are not in everyday use but may be of benefit to us in the future. Conclusion
  19. 19. © CommNet 2013 Education Phase 4 Nanotechnology
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