1.4 Smart And Composite Materials Flashcards
What are modern materials?
Existing materials that have been alerted to improve their properties.
What are smart materials?
Materials that respond to changes in that environment.
Name 7 smart/modern materials
Shape memory alloys
Reactive glass
Photochromic glass
Temperature responsive polymers
Conductive inks
Nanomaterials
What are SMAS? Where are they used?
They will return to original shape when heated.
Glasses frames
Tweezers
Medical stent
What is one advantage and two disadvantage of SMAS?
Expensive
Metal fatigue
Lengthy lifespan of product
What are nanomaterials? What are they used for?
Materials made up of tiny components
Sunscreen
Car bumpers
What is photochromic glass? What is it used for?
Darkens when exposed to light.
Sunglasses
Plane cockpit windows
Advantage and disadvantages of photochromic glass
Can undergo thousands of cycles without affecting performance
Maybe slow to react
User cannot control reaction
What is Reactive glass? Where is it used?
Changes from transparent to opaque when voltage is supplied
Welding masks
Windows
What are piezoelectric materials?
Generate small charge when compressed or reverse.
Used to generate electricity
What are temperature responsive polymers? Where are they used?
Materials that changed their physical properties with changes of temperature.
Biomedical applications
What is conductive ink? What is is used for?
Pigment that allows current to flow through.
Used for drawning circuits
What are Composite materials?
Materials that are made up of more than one existing material.
Name 5 composite materials
Concrete
Plywood
Fiberglass/carbon fiber
Reinforced polymers
Robotic materials
What are some advantages and disadvantage of concrete?
Excellent compressive strength
Can be molded into complex shapes
Good durability
Fire resistant
Maybe damaged by corrosion of reinforcement bars
What is concrete used for?
Construction
What are some advantages and disadvantage of plywood?
High strength to weight ratio
High impact resistance
Plywood may come apart if exposed to water
What is plywood used for?
Furniture
Flooring
What are some advantages and disadvantage of carbon fiber/fiber glass?
Good durability
Lightweight
Excellent strength to weight ratio
Breathing carbon covers in may cause respiratory issues
What are some uses carbon fiber and fiber glass?
GPR:
used for body of cars
Baths
Showers
CFRP:
Armor
Golf clubs
What are some advantages and disadvantage of reinforced polymers?
Strong
Good insulator of heat
Good insulator of electricity
Expensive
What are some advantages and disadvantages of robotic materials?
Can react to surroundings
Can react quickly
Expensive
Complex
What are technical textiles?
Materials that are developed for function rather than appearance
Name 7 technical textiles
Sports
Eco friendly
Protective
Geotextile
Domestic
Construction
Agrotextiles
What are some advantages and disadvantage of agrotextiles?
Reduces need for pesticides
Can be cheap
May damage ecosystems
Is eco friendly
Advantages and disadvantages of construction textiles
Strong
Light weight
Expensive
May degrade over time
Advantages and disadvantages of Geotextiles
Do not rot
Cost effective
Deal well with water
Inefficiency when damaged
Is eco friendly
Advantages and disadvantages of domestic textiles
Hard wearing
Stain resistance
Absorbent
Expensive
Flammable
(Eg- wipes, carpets)
Advantages and disadvantages of protective textiles
Resistance to external factors
Breathable
Lightweight
Expensive
Not eco friendly
Advantages and disadvantages of sports textiles
Lightweight
Breathable
Moisture resistant
Expensive
Not eco friendly
