Smart Materials

What is a smart material?

A smart material is a material that changes properties depending on the environmental conditions.

Polymorph

• Thermoplastic material that can be reshaped numerous times

• When heated, it forms a clear, malleable material

• When cooled, it forms a solid

• Applications: 3D modelling

Smart Material Alloys (SMA)

• SMA wire is made up of Nickel and Titanium

• When heated, it returns to its original shape

• SMA can be programmed to remember a shape

Thermochromic Inks

• Inks that change color in response to changes in temperature

• Applications: forehead thermometers and food packaging

Hydrochromic Inks

• Inks that change color when in contact with water

• Application: To test the moisture of plants

• Blue = Hydrated, Yellow = Dry

Photochromic Inks

• Inks that darken as light levels increase

• Applications: Sunglasses, Spectacles

Aroma Pigments

• Inks/Paints that give an aroma when scratched

• Applications: Perfume samples in women’s magazines

Hydrocarbon Encapsulating Polymers

• Polymers that absorb oil and forms a rubbery substance

• They are environmentally friendly

• Applications: To manage hydrocarbon-based liquid spills such as petrol