Worksheets1.4 Smart And Composite Materials, And Technical Textiles
Total questions: 40
Worksheet time: 20mins
The definition of a smart material is;
A material that remains the same as its environment changes
A material that physically changes in response to a change in its environment
A material that has been developed in the last 50 years
A material made by combining two separate materials
Smart materials have arisen due to;
developments in Science and Engineering
developments in Engineering and Medicine
developments in Science and Medicine
developments in Science and Mathmatics
Modern materials;
include thermochromic and hydrochromic pigments
are made from layers of material
have been developed in the last 50 years
are made by combining two separate materials
Composite materials;
Consist of a matrix and a reinforcement
physically change in response to a change in their environment
have been developed in the last 50 years
are made by combining two separate materials
Technical textiles are;
made by combining layers of material
developed for enhanced performance
are a combination of two separate materials
are made from layers of material
What is a SMA?
Shape Memory Aluminum
Shape Memory Araldite
Shape Memory Alloy
Shape Memory Acrylic
Examples of technical textiles;
SMAs and thermo-chromic pigments
Glulam and wood veneers
Gore-tex and Kevlar
MDF and cement
Select the two correct smart materials?
Polymorph and Thermochromic Ink
Polygon and Thermochromic Ink
Polymorph and Disappearing Ink
Polyester and Thermochromic Ink
What happens to a SMA when heated above its critical temperature?
It bends at 90 degrees
It returns to its original shape
nothing
It returns to its original size
Hydrochromic inks are used to;
identify moisture
identify heat
identify light
identify pressure
Thermochromic pigments
change colour in response to changes in temperature
change colour in response to changes in light
change colour in response to changes in moisture
change colour in response to changes in electrical current
Polymorph;
resist high temperatures
can only be shaped once
can be moulded by hand at low temperatures
can be reshaped twice.
Which smart material is used in the manufacture of baby feeding spoons?
Hydro-chromic pigments
Electro-chromic pigments
Thermo-chromic pigments
Photo-chromic pigments
Examples of composite materials;
Kevlar and fire retardant fabric
Polymer laminated glass and Glulam
Glass-reinforced polymer and cements
Piezoelectric crystals and SMAs
A material that provides a visible light when exposed to a current, is called what?
Electroluminescent
Luminescent
Electrolight
Lightbulb
What is an advantage of using composite materials?
You mixed one material with water to get a desirable property
You collect raw materials from the ground that have selected properties
You combine two or more materials together to get desirable properties
You combine two or more materials together to get the worst properties
Smart materials: I am a smart material that is easily bent when cool but jump back into shape when heated above a certain temperature eg. nitinol
Shape memory Alloys
Nano Materials
Ceramics
Cornstarch polymers
Smart materials: Glow in the dark, absorbs light during the day and emits it when dark E.G Fire exit signs
Photochromic Materials
Thermochromic Materials
Phosphorescent pigments
Holograms
Smart materials: They change colour depending on the amount of light hitting the surface. By far the most common use of this is in light-sensitive glasses, such as sunglasses.
Reflective Films
Phosphorescent pigments
Holograms
Photochromic Materials
Smart materials: A thermochromic substance ...
Changes colour when the light intensity changes.
Changes colour when the temperature changes.
Absorbs up to 1000 x its volume in water.
Returns to its original shape when heated.
Smart materials: A shape memory alloy is used in ...
Nappies
Gumshields / mouthguards
Glasses frames
Transition glasses lenses
Smart materials: When I am dry and at room temperature I am solid. If you put me in water over 60 degrees I become mouldable.
Kevlar
Precious metal clay
High density modelling foam
Polymorph
-they have medical uses(antibacterial fabrics)
-Self cleaning fabrics
A smart material is a material which responds to a stimulus like heat or light, and then...?
Stays the same when the stimulus is removed.
Changes more when the stimulus is removed.
Returns to it's original state when the stimulus is removed.
What smart material changes colour when an electrical input is applied?
Thermochromic Materials
Photochromic Materials
Electrochromic Materials
Hydrochromic Materials
What smart material stores light in the day and emits it in the dark?
Thermochromic Materials
Phosphorescent Materials
Electrochromic Materials
Hydrochromic Materials
What is an example of a photochromic product?
Glasses which change to Sunglasses
Forehead Thermometer
Moisture Detector (shows when plants need watering)
Smart Glass (turns opaque when a stimulus is applied)
What is an example of a phosphorescent product?
Glasses which change to Sunglasses
Fire Exit Sign
Moisture Detector (shows when plants need watering)
Smart Glass (turns opaque when a stimulus is applied)
Layers of veneers bonded with glue to produce a flat sheet
Concrete
Plywood
Robotic materials
Reinforced polymers
Fibre/Carbon/Glass
