LBS_172L_Students_Lab_2_-_Ferrofluids

LBS_172L_Students_Lab_2_-_Ferrofluids - Ferrofluids All...

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LBS 172L Week of January 25 2009 Ferrofluids
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Waste All waste containing tetramethylammonium hydroxide MUST be placed in waste container All solid waste with ferrofluids must be placed in solid waste container. NOT IN TRASH
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Chemical Terms Colloid Micelle Ferromagnetic Paramagnetic Surfactant
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Ferrofluids First created by NASA to control the flow of fluids A stable colloidal suspension of nanoparticles in a liquid carrier. ( Usually organic or water) Average size is 10 nm or 100Å. Coated with surfactant to prevent agglomeration Paramagnetic not ferromagnetic as name would suggest Stable, will not undergo sedimentation
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Will stick to a magnet Used as sealant in hard drives etc, dampers for loudspeakers Changes it apparent density in proportion to the magnetic field Viscosity controllable with magnets Separating different types of waste in recycling (electrical transformers, sensors) Takes on three dimensional shape of the magnetic field it is exposed to. Art work, drug targeting
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LBS_172L_Students_Lab_2_-_Ferrofluids - Ferrofluids All...

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