nano particles

Question 1

risks of nanoparticles

Answer 1

early stages so unknown factors
could affect health
could be long term effects
not easily disposed off of body
small amount of toxicity can be multiplied by high surface area to volume ratio

Question 2

how is titanium dioxide nanoparticle used in suncream

Answer 2

• blocks uv light
• leaves no white marks

Question 3

how is fullerene nanoparticle used in suncream

Answer 3

• medicine and drug design
• as they are more easily absorbed
• electronic circuitry and coatings

Question 4

nanoparticles of silver

Answer 4

sprayed onto medical clothing and masks
flexibility still
but now antibacterial

Question 5

glass properties and how its made

Answer 5

• isnulates heat, durable
• lime(stone) sodium carbonate (soda) + sand

Question 6

clay ceramics use and made

Answer 6

resist compressive forces
hardens when fired
used to build walls which withstand pressure and weight

Question 7

polymers bulk materials properties

Answer 7

specific properties
opaque, transparent, tought flexible - some brittle
poor conductor

Question 8

composites

Answer 8

made from reinforcement and matri

Question 9

concrete

Answer 9

reinforcement - steel
matrix - concrete