Smart Materials: Thermochromic Liquid Crystals and Leuco Dyes

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What is the primary difference between Leuco Dyes and Liquid Crystals in terms of precision?

Leuco Dyes are more expensive than Liquid Crystals

Leuco Dyes are less precise than Liquid Crystals (correct)

Leuco Dyes are more precise than Liquid Crystals

Leuco Dyes are more widely used than Liquid Crystals

What is the primary use of Cold-activated thermochromic ink?

To create a colour change when heated

To reveal an image or another colour printed beneath

To alert users to potential safety hazards

To create a colour change when cooled (correct)

What is the characteristic of Leuco Dyes that allows them to change colour back and forth?

They are irreversible

They are reversible (correct)

They are colour-specific

They are temperature-independent

What is the main application of High-temperature thermochromic ink?

To alert users to potential safety hazards Signup and view all the answers

What is the primary use of Touch-activated thermochromic ink?

To reveal an image or another colour printed beneath Signup and view all the answers

In what forms are Leuco Dyes products available?

In a wide variety of colours, temperatures and forms Signup and view all the answers

What type of inks are temperature-sensitive compounds that temporarily change colour with exposure to heat?

Thermochromic inks Signup and view all the answers

What is the temperature range of the SFXC LC product?

24°C to 29°C Signup and view all the answers

What is the typical application of Liquid Crystals?

Forehead thermometers and medical devices Signup and view all the answers

What is the primary difference between Liquid Crystals and Leuco Dyes?

Precision of temperature response Signup and view all the answers

What is the construction of SFXC LC sheets?

A thin layer of liquid crystal on a black background with a polyester laminate Signup and view all the answers

What type of inks are used on T-shirts as shown in Figure 9?

Photochromic inks Signup and view all the answers

What type of change can some smart materials exhibit in response to external stimuli?

Change in one or more specific properties Signup and view all the answers

What is a characteristic that distinguishes smart materials from modern materials?

Ability to change in response to external stimuli Signup and view all the answers

What is a key feature of smart materials that sets them apart from other materials?

Change is inherent to the material Signup and view all the answers

What type of stimulus can cause some smart materials to change?

Change in temperature, UV light level, or strain rate Signup and view all the answers

What is a common characteristic of all smart materials?

They are all reactive Signup and view all the answers

What category of materials do smart materials belong to?

Metals, polymers, ceramics, and composites Signup and view all the answers