Smart Materials Flashcards
What’s meant by smart materials?
A change in physical properties in response to external input / environmental change
What are some examples of external input?
Electricity
Pressure
Temperature
Light
What’s phosophercent pigment?
Used for exit signs
• absorbs light during day and re emits when dark
what is meant by SMA
shape memory alloy
what’s an example of SMA?
nitinol
how does shape memory alloy work?
change shape in response to temp or electrical input
uses of SMA?
dental braces
- change length due to heat
self closing doors
how does Thermochromic pigment work?
changes colour due to temp change
uses of Thermochromic pigment?
room thermometers
colour changing mugs
uses of phosphorescent?
fire exit signs
glow in the dark products- adhesive stickers
How does photochromic pigment work?
Colour change due to light intensity
Photochromic pigment uses?
Welding goggles
How does piezoelectric material work?
Size increase due to electrical current
How much does piezoelectric material increase in size?
Up to 4%
How does electroluminescent wire?
Glows due to alternating current
