strong composites in structures. Careful choice of laminates almost eliminates natural defects e.g. knots and shakes. Revival recently: better s2w ratio than steel, lower energy to form/shape, sustainable resource.

form of aromatic polyamide (polymer with ring like molecules in long chains) artificial fibre Tough and tensile strong because of density + chemical bonds in molecular structure. Often combined w/ resins: advanced composites. E.g. puncture resist tyres

Precious metal clay (PMC)

microscopic metal particles in pliable medium. Then sintered (raising temp until particles fuse and medium burned off). Latest only need 10 mins at 700C, shrinking in size by about 10 percent - must be factored into design especially if for ring.

1-100 nm. Cosmetics. Investigated to make nanoelectric devices, reducing size and increasing capacity. Also coating materials and products, potential for revolutionary medical and electrical applications (e.g. graphene-coat anodes to extend battery life)

nanomaterial. Good tensile, hardness, heat resist, electrical conductivity. carbon nanotubes incredibly thin and hollow so could do medical such as delivering drugs. But nanomaterials not recyclable and some toxic, so caution needed with adoption.

Social issues affect large number of people. Ethical issues are related to beliefs.

Corporate social responsibility (CSR)

self regulatory scheme for companies to keep responsible and sustainable.

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DT 2.3

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Question	Answer
Glulam	strong composites in structures. Careful choice of laminates almost eliminates natural defects e.g. knots and shakes. Revival recently: better s2w ratio than steel, lower energy to form/shape, sustainable resource.
Kevlar	form of aromatic polyamide (polymer with ring like molecules in long chains) artificial fibre Tough and tensile strong because of density + chemical bonds in molecular structure. Often combined w/ resins: advanced composites. E.g. puncture resist tyres
Precious metal clay (PMC)	microscopic metal particles in pliable medium. Then sintered (raising temp until particles fuse and medium burned off). Latest only need 10 mins at 700C, shrinking in size by about 10 percent - must be factored into design especially if for ring.
Nanomaterials	1-100 nm. Cosmetics. Investigated to make nanoelectric devices, reducing size and increasing capacity. Also coating materials and products, potential for revolutionary medical and electrical applications (e.g. graphene-coat anodes to extend battery life)
Graphene	nanomaterial. Good tensile, hardness, heat resist, electrical conductivity. carbon nanotubes incredibly thin and hollow so could do medical such as delivering drugs. But nanomaterials not recyclable and some toxic, so caution needed with adoption.
Social vs ethical	Social issues affect large number of people. Ethical issues are related to beliefs.
Corporate social responsibility (CSR)	self regulatory scheme for companies to keep responsible and sustainable.

Created by: Pyrogearos2

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