1.2 Smart and modern materials Flashcards
What are the 5 smart materials
SMA, Thermochromic pigment, phosphorescent pigment, photochromic, piezoelectric
What is a use of SMA
Dental braces, aeroplane wing flaps
What is SMA generally made from
Nitinol (Nickel and titanium)
What does SMA do
returns to its original shape with electricity or heat
What is a use of thermochromic pigment
colour change mugs
What does thermochromic pigment do
changes colour in response to heat change
What happens in thermochromic pigment to cause colour change
the pigment crystals realign
What is a use of phosphorescent pigment
night lights, glow in the dark masks
What does phosphorescent pigment do
absorbs UV in the day and releases it in the night
What is a use of photochromic
welding goggles
What does photochromic do
changes colour with UV changes
What does peizoelectric do
gives of a small current when deformed and vice versa
What is a use of electroluminescent wire
outdoor decorative lighting
What is a use of piezoelectric
watches and airbag sensors
What does electroluminescent wire do
glows in AC
What are the 5 modern materials
Kevlar, precious metal clay, high density modelling foam, polymorph, graphene
What is a use of Kevlar (modern material)
Body armour
How does polymorph become mouldable
When it is heated to 60 degrees
What is a use of high density modelling foam
3D modelling
What is a use of precious metal clay
jewellery
What is a use of graphene
drug delivery, electronics
What is a use of polymorph
modelling
How can you make Kevlar stronger
interweave with carbon fibre
What modern material can be used to make expensive looking jewellery
precious metal clay
What is 2 properties of high density modelling foam
lightweight and easy to work
What is graphene’s structure
A one atom thick 2D carbon form
What is a disadv of graphene
Lacks recyclability and has potential toxicity
What is a form of graphene that has better properties
Has high tensile strength and hardness when rolled
