Other Materials

Question 1

Modern materials

Answer 1

Liquid crystal displays (LCDs)

Smart ink

Question 2

What are smart materials?

Answer 2

Materials that have the properties that react to change in their environment

Question 3

Composite materials

Answer 3

Carbon fibre
Glass reinforced plastics (GRP)
MDF

Question 4

Examples of smart materials

Answer 4

Thermochromic liquid crystals
Piezoelectric crystals
Smart ink
Radio frequency identification

Question 5

Phosphorescent ink glows in the dark because??

Answer 5

The crystals absorb the light.

The energy is stored and then released as light.

Question 6

What is thermochromic ink

Answer 6

An ink that glows in the dark

Question 7

What do piezo electric crystal do?

Answer 7

Convert kinetic evergy (movement) into a voltage

Example - birthday cards

Question 8

Haw are images produced using smart ink?

Answer 8

Top transparent electrode
Bottom electrode
Negatively charged black pigment
Positively charged white pigment

Question 9

Describe how thermochromic film could be used to enhance packaging?

Answer 9

Ink can change colour
Reacts with heat
Shws correct temperature
For decoration

Question 10

Benefits of using an LCD display

Answer 10

Lightweight
Suitable for portable devices
Quick response to data input
Range of colours on display
Low power so little battery use
Clear to see