smart materials

Question 1

smart material definition

Answer 1

physical properties change in response to input or external environment

Question 2

SMA

Answer 2

e.g. nitinol
change shape in response to change in temp or electrical input

dental braces, self closing windows

Question 3

thermochromatic pigment

Answer 3

changes colour in response to change in temp

thermometers, baby food spoons

Question 4

phospherescent pigment

Answer 4

absorbs light energy during the day and re-emits when dark

fire exits signs

Question 5

photochromatic pigment

Answer 5

changes colour with light intensity

welding goggles, security markers showing up under UV light

Question 6

electroluminescent wire

Answer 6

thin copper wire coated in phospherescent material that glows in response to altering current

glow bracelets, outdoor decorative lighting

Question 7

piezo electric material

Answer 7

gives off small electric charge when deformed
increases in size by 4% when current passed through

air bag sensors, musical greetings cards