1.3.2

Smart Materials

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Smart Materials

A smart material is a material that will react to a change in the environment. This group of materials change when stimulated by heat, pressure, water, stress, PH Level, light or electricity.

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Thermochromic pigments

  • Thermochromic pigments change when stimulated by heat.
  • The material is in a pigment form and is added to a variety of products.
  • The pigment colour usually changes when they heat up or cool down.
  • Commonly used in children’s thermometers, temperature indicators, children’s cutlery or novelty goods.
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Photochromic pigments

  • Photochromic pigments change when stimulated by light.
  • The material is in a pigment compound and is added to a variety of products.
  • The pigment colour usually changes when exposed to UV light where they lighten or darken once the light is taken away.
  • Commonly used in clothing, light changing paints and children’s novelty products.
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Shape memory alloys (SMA)

  • Shape memory alloys (SMA) change when stimulated by heat or electricity.
  • The material is usually a thin metal wire or sheet.
  • A shape memory alloys (SMA) can be heated then deformed.
  • The shape will return to its original design when reheated.
  • Commonly used in surgical stents, dental braces, glasses for frames and fire sprinklers.
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Polycaprolactone (PCL)

  • Polycaprolactone is commonly known as polymorph and changes when stimulated by heat.
  • A white or coloured clear bead that can be easily moulded by hand.
  • This smart material is fully biodegradable and can be moulded and remoulded in hot water.
  • Commonly used in prototype modelling, hand-shaped products and jewellery.

Smart Materials

A smart material is a material that will react to a change in environment. This group of materials change when stimulated by heat, pressure, water, stress PH Level, light or electricity.

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Quantum tunnelling composite (QTC)

  • Quantum tunnelling composites change when stimulated by pressure.
  • This polymer layer has suspended conductive nanoparticles that do not touch each other.
  • This smart material is in a free-flowing state at rest but a conductor when stimulated by pressure.
  • Commonly used in touch-sensitive mobile screens, wearable technology and speed controllers.
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Piezoelectrical material

  • Piezoelectrical materials change when stimulated by movement, electricity or stress.
  • This material can be polymer, ceramic or quartz crystal.
  • A change or shape in a material is a result of stress or movement applied producing an electrical signal.
  • Commonly used in mobile phone speakers, gas lighters, quartz clocks and inkjet printers.
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Litmus paper

  • Litmus paper changes colour when stimulated by a PH level.
  • These strips of paper change colour when in contact with various levels of PH, turning red in acid and blue in alkaline.
  • Commonly used for scientific experiments for PH levels, soil testing for gardeners and chemical balance for swimming pools.

Jump to other topics

1Core Technical Principles

2Paper & Board: Specialist Technical Principles

3Timber: Specialist Technical Principles

4Metal: Specialist Technical Principles

5Polymers: Specialist Technical Principles

6Textiles: Specialist Technical Principles

7Designing & Making Principles

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