Smart Materials

Question 1

What are smart materials?

Answer 1

react to their environment
- in response to a stimulus

Question 2

What is thermochromic pigment?

Answer 2

paint that REACTS TO HEAT
measure body temperature
on fridge/freezer
nail polish

Question 3

What is photochromic pigment?

Answer 3

paint that REACTS TO LIGHT
tinted windows in limo

Question 4

What is phosphorescent pigment?

Answer 4

REACTS TO LIGHT - will absorb energy in light, and emit light in the dark
fire exit / extinguisher signs in the night
high end watches

Question 5

What is polymorph?

Answer 5

REACTS TO HEAT
when hot water poured on granules, turns to a putty = can be moulded around objects
personalised grips for spoon/cane for elderly with arthritis

Question 6

What is piezoelectric?

Answer 6

REACT TO PRESSURE
pressure causes small electric shock
kids shoes with lights
air bag - pressure = immediate inflation
security system rings doorbell because of pressure on door mat

Question 7

*What is shape memory alloy?

Answer 7

REACT TO HEAT
if metal but in hot water, will return to original shape
braces - are cold when applied to teeth, heated up and return to og shape = pull teeth
stents - when cold = small, then heated up by body/blood = widen arteries

Question 8

What is electroluminescent wire?

Answer 8

REACT TO CURRENT
phosphor layer glows around a copper core and below copper wires, with a small electric current that runs through
reflective bike jacket for safety
fashion

Question 9

What is magnetrehestatic and
electroherestatic?

Answer 9

when magnet applies, becomes more viscous
when current applied, becomes more viscous