Smart materials

Question 1

Smart materials definition

Answer 1

responsive materials that are designed to react to external stimuli, the can alter the function or aesthetic properties in response to changing environment

Question 2

Smart materials examples

Answer 2

polymorph, shape memory alloy, thermochromic materials, photochromic materials, quantum tunneling composite

Question 3

Polymorph definition

Answer 3

can be shaped and reshaped many times, when warmed it becomes flexible and easy to mould, sets hard

Question 4

Shape memory alloy definition

Answer 4

revert back to its original shape after being deformed. uses - braces, treating blocked arteries

Question 5

Quantum tunnelling composite definition

Answer 5

flexible polymer with tiny metal particles embedded into it, when the material is squeezed the pressure forces the particles together and a current of electrons flows between the neighbouring particles, uses - microswitches, outdoor items that may be affected by water, touch sensitive pads

Question 6

Thermochromic material definition

Answer 6

temperature sensitive, change colour when exposed to different temperatures, uses - inks, plastics to indicate temperature

Question 7

Photochromic materials definition

Answer 7

change colours when exposed to different UV levels, over time will degrade from overexposure, uses - glasses lenses, inks, toys