1 / 15

Smart Materials

Smart Materials. Physics 87N Elaine Zelby Kevin Bird Amit Patel Δ. What is a Smart Material?. Basically it’s a material that reacts quickly to a stimulus in a specific manner.

gray-russell
Download Presentation

Smart Materials

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Smart Materials Physics 87N Elaine Zelby Kevin Bird Amit Patel Δ

  2. What is a Smart Material? • Basically it’s a material that reacts quickly to a stimulus in a specific manner. • The change in the material can also be reversible, as a change in stimulus can bring the material back to its previous state.

  3. Shape Memory Alloys (SMAs) • Metals that exhibit pseudo-elasticity and the “Shape Memory Effect” • The basic principle behind SMAs is that a solid state phase change occurs in these materials. • They switch between states of Austenite and Martensite.

  4. Example of SMA

  5. Appplications of SMAs • Popular SMAs are NiTi, CuZnAl, and CuAlNi • Applications include: • Aeronautical • Making flexible wings using shape memory wires • Medicine • Bone plates made of NiTi • Bioengineering • Muscle wires that can mimic human movement

  6. Smart Gels • A smart gel is a material that expands or contracts in response to external stimuli. • A smart gel consists of fluid that exists in a matrix of polymer(s). • Stimulus can include • Light • Magnetic • pH • Temperature • Electrical • Mechanical • Stimulus will alter the polymer that makes it more or less hydrophillic.

  7. Tanaka experiment Modeled after T. Tanaka, Science 19 November 1999: Vol. 286. no. 5444, pp. 1543 - 1545

  8. Applications of Smart Gels • Medical • Drug release • Organ replacement • Muscle replication • Industrial • Shake gels • Shock absorbers

  9. Rheological Materials • Material that can change its physical state very quickly in response to a stimulus • Stimulus include • Electrical • Magnetic • Ferromagnets • Magnetic field aligns ferromagnetic molecules in order in order to achieve solid state structure • Nanoparticles reduce IUT effect (In Use Thickening)

  10. Example of Magnetic Field on Rheological Material

  11. Applications of Rheological Materials • MR materials • Structural Support • Dampers to minimize vibrational shock from wind and seismic activity. • Industrial • Break fluids • Shock absorbers

  12. Magnetostrictive materials • Material that stretches or shrinks when a magnetic field is applied. • Conversely, when a mechanical force is applied on the material, a magnetic field is induced. • Ferromagnets • Magnetic field can be used to create an electric current

  13. Applications of Magnetorestrictive Materials • More efficient fuel injection system • Specific amounts of fuel • Higher frequency

  14. Fullerenes • A fullerene is any series of hollow carbon molecules that form either a closed cage, as in a buckyball, or a cylinder, like a carbon nanotube. • Most researched/utilized fullerene is the carbon-60 molecule (truncated icosaheedron) • Three nanotubes can be made by varying the chiral angle. • Arm-chair • Zig-zag • Chiral • Chiral angle determines conductivity

  15. Applications of fullerenes • Superconductors • By doping fullerenes with three variable atoms, a superconducting state can be achieved. • Medical • Atoms can be trapped in a buckyball, in order to create a biological sponge. • HIV protease inhibitor • A buckyball can be inserted in the HIV protease active site in order to stop replication.

More Related