Nanocomposites gopi


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Nanocomposites gopi

  1. 1. NANO COMPOSITES V. Gopi Krishna. 13MCD1053
  2. 2. Introduction • The term "Nanotechnology" was invented by Taniguchi in 1974 • Nano science is the study of phenomena and manipulation of materials at atomic, molecular and macromolecular scales, where properties differ significantly from those at a larger scale; while nanotechnology describes design, characterization, production and application of materials and systems by controlling the size at nanometer scale.
  3. 3. • A nanometer is so small that we cannot see something of this size without the use of very powerful microscopes. It is used to measure things that are very tiny i.e. atoms and molecules. • Materials at this scale behave very differently from when they are in larger form.
  4. 4. • This technology offers better built, long lasting, cleaner, safer and smarter products for the home, for medicine, for agriculture, for communication and for industry in general.
  5. 5. Applications of Nano technology
  6. 6. Nano composites • A nanocomposite is a matrix to which nanoparticles have been added to improve a particular property of the material less than 100 nanometers (nm), or structures having Nano-scale repeat distances between the different phases that make up the material. • The properties of nanocomposite have caused researchers and companies to consider using this material in several fields.
  7. 7. • In mechanical terms, nanocomposite differ from conventional composite materials due to the exceptionally high surface to volume ratio of the reinforcing phase and/or its exceptionally high aspect ratio. • Nanocomposite are found in nature, for example in the structure of the bone.
  8. 8. • Large amount of reinforcement surface area means that a relatively small amount of nanoscale reinforcement can have an observable effect on the macro scale properties of the composite. • For example, adding carbon nanotubes improves the electrical and thermal conductivity. • Other kinds of nanoparticulates may result in enhanced optical properties, dielectric properties, heat resistance or mechanical properties such as stiffness, strength and resistance to wear and damage
  9. 9. Use and applications • Producing batteries with greater power output. Researchers have developed a method to make anodes for lithium ion batteries from a composite formed with silicon nanospheres and carbon nanoparticles. The anodes made of the silicon-carbon nanocomposite make closer contact with the lithium electrolyte, which allows faster charging or discharging of power.
  10. 10. Medical • Speeding up the healing process for broken bones. Researchers have shown that growth of replacement bone is speeded up when a nanotube - polymer nanocomposite is placed as a kind of scaffold which guides growth of replacement bone. The researchers are conducting studies to better understand how this nanocomposite increases bone growth.
  11. 11. • Producing structural components with a high strength-to-weight ratio. For example an epoxy containing carbon nanotubes can be used to produce nanotube-polymer composite windmill blades. This results in a strong but lightweight blade, which makes longer windmill blades practical. These longer blades increase the amount of electricity generated by each windmill.
  12. 12. • Using nanocomposite to make flexible batteries. A nanocomposite of cellulous materials and nanotubes could be used to make a conductive paper. When this conductive paper is soaked in an electrolyte, a flexible battery is formed.
  13. 13. Gopi Krishna