1.2 Smart and modern materials Flashcards

1
Q

What are the 5 smart materials

A

SMA, Thermochromic pigment, phosphorescent pigment, photochromic, piezoelectric

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2
Q

What is a use of SMA

A

Dental braces, aeroplane wing flaps

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3
Q

What is SMA generally made from

A

Nitinol (Nickel and titanium)

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4
Q

What does SMA do

A

returns to its original shape with electricity or heat

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5
Q

What is a use of thermochromic pigment

A

colour change mugs

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5
Q

What does thermochromic pigment do

A

changes colour in response to heat change

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6
Q

What happens in thermochromic pigment to cause colour change

A

the pigment crystals realign

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7
Q

What is a use of phosphorescent pigment

A

night lights, glow in the dark masks

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8
Q

What does phosphorescent pigment do

A

absorbs UV in the day and releases it in the night

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9
Q

What is a use of photochromic

A

welding goggles

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9
Q

What does photochromic do

A

changes colour with UV changes

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10
Q

What does peizoelectric do

A

gives of a small current when deformed and vice versa

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10
Q

What is a use of electroluminescent wire

A

outdoor decorative lighting

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10
Q

What is a use of piezoelectric

A

watches and airbag sensors

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11
Q

What does electroluminescent wire do

A

glows in AC

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11
Q
A
12
Q

What are the 5 modern materials

A

Kevlar, precious metal clay, high density modelling foam, polymorph, graphene

13
Q

What is a use of Kevlar (modern material)

A

Body armour

14
Q

How does polymorph become mouldable

A

When it is heated to 60 degrees

14
Q

What is a use of high density modelling foam

A

3D modelling

14
Q

What is a use of precious metal clay

A

jewellery

15
Q

What is a use of graphene

A

drug delivery, electronics

15
Q

What is a use of polymorph

A

modelling

15
Q

How can you make Kevlar stronger

A

interweave with carbon fibre

15
Q

What modern material can be used to make expensive looking jewellery

A

precious metal clay

16
Q

What is 2 properties of high density modelling foam

A

lightweight and easy to work

17
Q

What is graphene’s structure

A

A one atom thick 2D carbon form

18
Q

What is a disadv of graphene

A

Lacks recyclability and has potential toxicity

19
Q

What is a form of graphene that has better properties

A

Has high tensile strength and hardness when rolled