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Delta_SmartMaterials & Its Applications.ppt
- 1. Smart Materials Smart Materials PREPAREDBY: PREPARED BY: DINAKARAN.R DINAKARAN.R JANAKIRAMAN.E JANAKIRAMAN.E
- 2. What is aSmart Material? What is a Smart Material? Basically it’s a material that reacts quickly Basically it’s a material that reacts quickly to a stimulus in a specific manner. to a stimulus in a specific manner. The change in the material can also be The change in the material can also be reversible, as a change in stimulus can reversible, as a change in stimulus can bring the material back to its previous bring the material back to its previous state. state.
- 3. Shape Memory Alloys(SMAs) Shape Memory Alloys (SMAs) Metals that exhibit pseudo-elasticity and Metals that exhibit pseudo-elasticity and the “Shape Memory Effect” the “Shape Memory Effect” The basic principle behind SMAs is that a The basic principle behind SMAs is that a solid state phase change occurs in these solid state phase change occurs in these materials. materials. They switch between states of Austenite They switch between states of Austenite and Martensite. and Martensite.
- 4. Example of SMA Exampleof SMA
- 5. Appplications of SMAs Appplicationsof SMAs Popular SMAs are NiTi, CuZnAl, and Popular SMAs are NiTi, CuZnAl, and CuAlNi CuAlNi Applications include: Applications include: Aeronautical Aeronautical Making flexible wings using shape memory wires Making flexible wings using shape memory wires Medicine Medicine Bone plates made of NiTi Bone plates made of NiTi Bioengineering Bioengineering Muscle wires that can mimic human movement Muscle wires that can mimic human movement
- 6. Smart Gels Smart Gels Asmart gel is a material that expands or contracts in A smart gel is a material that expands or contracts in response to external stimuli. response to external stimuli. A smart gel consists of fluid that exists in a matrix of A smart gel consists of fluid that exists in a matrix of polymer(s). polymer(s). Stimulus can include Stimulus can include Light Light Magnetic Magnetic pH pH Temperature Temperature Electrical Electrical Mechanical Mechanical Stimulus will alter the polymer that makes it more or less Stimulus will alter the polymer that makes it more or less hydrophillic. hydrophillic.
- 7. Tanaka experiment Tanaka experiment Modeledafter T. Tanaka, Science 19 November 1999: Vol. 286. no. 5444, pp. 1543 - 1545
- 8. Applications of SmartGels Applications of Smart Gels Medical Medical Drug release Drug release Organ replacement Organ replacement Muscle replication Muscle replication Industrial Industrial Shake gels Shake gels Shock absorbers Shock absorbers
- 9. Rheological Materials Rheological Materials Materialthat can change its physical state Material that can change its physical state very quickly in response to a stimulus very quickly in response to a stimulus Stimulus include Stimulus include Electrical Electrical Magnetic Magnetic Ferromagnets Ferromagnets Magnetic field aligns ferromagnetic molecules in order to Magnetic field aligns ferromagnetic molecules in order to achieve solid state structure achieve solid state structure Nanoparticles reduce IUT effect (In Use Thickening) Nanoparticles reduce IUT effect (In Use Thickening)
- 10. Example of MagneticField on Example of Magnetic Field on Rheological Material Rheological Material
- 11. Applications of Rheological Applicationsof Rheological Materials Materials MR materials MR materials Structural Support Structural Support Dampers to minimize vibrational shock from wind Dampers to minimize vibrational shock from wind and seismic activity. and seismic activity. Industrial Industrial Break fluids Break fluids Shock absorbers Shock absorbers
- 12. Magnetostrictive materials Magnetostrictive materials Materialthat stretches or shrinks when a Material that stretches or shrinks when a magnetic field is applied. magnetic field is applied. Conversely, when a mechanical force is Conversely, when a mechanical force is applied on the material, a magnetic field is applied on the material, a magnetic field is induced. induced. Ferromagnets Ferromagnets Magnetic field can be used to create an Magnetic field can be used to create an electric current electric current
- 13. Applications of Magnetorestrictive Applicationsof Magnetorestrictive Materials Materials More efficient fuel injection system More efficient fuel injection system Specific amounts of fuel Specific amounts of fuel Higher frequency Higher frequency
- 14. Fullerenes Fullerenes A fullerene isany series of A fullerene is any series of hollow carbon molecules that hollow carbon molecules that form either a closed cage, as form either a closed cage, as in a buckyball, or a cylinder, in a buckyball, or a cylinder, like a carbon nanotube. like a carbon nanotube. Most researched/utilized Most researched/utilized fullerene is the carbon-60 fullerene is the carbon-60 molecule (truncated molecule (truncated icosaheedron) icosaheedron) Three nanotubes can be made Three nanotubes can be made by varying the chiral angle. by varying the chiral angle. Arm-chair Arm-chair Zig-zag Zig-zag Chiral Chiral Chiral angle determines Chiral angle determines conductivity conductivity
- 15. Applications of fullerenes Applicationsof fullerenes Superconductors Superconductors By doping fullerenes with three variable atoms, a By doping fullerenes with three variable atoms, a superconducting state can be achieved. superconducting state can be achieved. Medical Medical Atoms can be trapped in a buckyball, in order to Atoms can be trapped in a buckyball, in order to create a biological sponge. create a biological sponge. HIV protease inhibitor HIV protease inhibitor A buckyball can be inserted in the HIV protease active A buckyball can be inserted in the HIV protease active site in order to stop replication. site in order to stop replication.