Product Design - Smart Materials
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Define what is meant by a smart material.
Materials that change their physical property in response to a input.
Give name of 4 smart materials, and give there change on input.
Thermochromic; a material that changes colour in response to a change in temperature.
Photochromic; a material that changes colour/shade depending on the level of light in the environment.
Phosphorentscent; a material that absorbs light and then readmits it. (glow in the dark).
Shape memory alloy; "Nitonol". Wire that can be bent into shape but will always return to it's original shape with heat.
Polymorf; When moulded gently is soft, but when handled with force is hard.
Name a use for the following smart materials.
Shape Memory alloy
Uses of thermochromic pigment; Injected into plastics/clothing. Baby spoon, baby clothing.
Uses of shape memory alloy; glasses frames, braces.
uses of Thermochromic sheet; thermal warning patches.
Uses of Polymorf; grips, modeling.
Uses of photochromic; transition sunglasses, sun blocking windscreens.
Uses of phosphorescent; watch hands.
Give the properties of Photochromic pigment (thermometers).
Changes colour with temperature.
- Thermometer;Much safer to use for the user than mercury.
- Can be used to indicate temperature ranges on the thermometer, eg. cold for low red for high.
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