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Transparent Lightweight Bioceramic (Mollusk Shell) Armour: Energy Dissipating Mechanism
04-01-2014, 08:00 PM #1
UniqueStranger Art in my heart
Posts:14,881 Threads:420 Joined:Jun 2012
Quote:Published in the journal Nature Materials on Mar. 30, MIT researchers Christine Ortiz and colleague Ling Li have detailed research of a “windowpane” oyster’s shell that uses long diamond-shaped crystals that can dissipate energy from penetrating forces nearly ten times better than calcite-based rocks such as limestone and chalk.

The researchers look to combine the strength of the shell structure with the transparent crystals that would not be as bulky as traditional armor such as Kevlar.

http://washington.cbslocal.com/2014/03/3...us-troops/

http://www.nature.com/nmat/journal/vaop/...t3920.html

It's interesting, because after impact, cracks do not form, or at least are stopped dead in their tracks. Imagine all the other uses; bulletproof protection, windows, aquarium tanks, etc.
04-01-2014, 08:27 PM #2
JayRodney ⓐⓛⓘⓔⓝ
Posts:31,262 Threads:1,438 Joined:Feb 2011
Great find! I'm certain it can be manufactured via nano tech. Would certainly cut down on the amount of windshields that need replaced every year.
That's quite common the further north you live.

wonder.gif
04-01-2014, 08:30 PM #3
UniqueStranger Art in my heart
Posts:14,881 Threads:420 Joined:Jun 2012
Why JR? Would that be because of the extreme cold conditions? I don't know if this bioceramic would lose it's integrity due to freezing.

Hmm, viscoplastic...

"...which catalyses a series of additional inelastic energy dissipating mechanisms such as interfacial and intracrystalline nanocracking, viscoplastic stretching of interfacial organic material, and nanograin formation and reorientation..."

Well, from the linked paper below, it looks like freezing will not impair it's strength and cohesion...go to page 36 "Ice Templation".

http://www.springer.com/cda/content/.../...489-c1.pdf - go to .PDF... A Review on the Structure and Mechanical
Properties of Mollusk Shells – Perspectives
on Synthetic BiomimeticMaterials
Francois Barthelat · Jee E. Rim · Horacio D. Espinosa

This material will be most useful when our soliders put boots on land in Siberia and the Arctic. damned.gif
04-01-2014, 09:11 PM #4
JayRodney ⓐⓛⓘⓔⓝ
Posts:31,262 Threads:1,438 Joined:Feb 2011
-30c temps, then your car is hooked up to an oil heater. The heat is about +10 to 20 when starting the car, temperature difference plays a big part.
Also, at horribly cold temps, with the heater running on the opposite site of the windshield, a pebble that, under normal circumstances bounce of, may well crack it.
The vast majority of used cars here have a crack in the windshield, it goes with the territory.

wonder.gif
04-01-2014, 09:19 PM #5
UniqueStranger Art in my heart
Posts:14,881 Threads:420 Joined:Jun 2012
I'm sure they can combine it with some other material so as to create more elasticity in that specific condition.
04-02-2014, 12:00 AM #6
Octo Mother Superior
Posts:42,572 Threads:1,469 Joined:Feb 2011
Interesting. They're really advancing in this area it seems, or is it just they're reporting more of it?


Futuristic ‘Living Materials’ Created From E. Coli And Gold Nanoparticles Can Adapt To The Environment

Researchers from the Massachusetts Institute of Technology are creating “living material” that could, one day, adapt to the environment or gain added properties to enhance performance.

MIT engineers combined E. coli as it produces a biofilm, which allows cells to stick together on a surface, containing “curli fibers.” According to the researchers, these curli fibers are used by E. coli -- a bacterium found in contaminated food that can be lethal -- to better attach to surfaces and can also be manipulated to include nanoparticles of gold.

http://www.ibtimes.com/futuristic-living...nt-1563176


Whoever thought of putting e-coli and gold together? damned.gif
04-02-2014, 12:03 AM #7
UniqueStranger Art in my heart
Posts:14,881 Threads:420 Joined:Jun 2012
(04-02-2014, 12:00 AM)Octo Wrote:  Interesting. They're really advancing in this area it seems, or is it just they're reporting more of it?


Futuristic ‘Living Materials’ Created From E. Coli And Gold Nanoparticles Can Adapt To The Environment

Researchers from the Massachusetts Institute of Technology are creating “living material” that could, one day, adapt to the environment or gain added properties to enhance performance.

MIT engineers combined E. coli as it produces a biofilm, which allows cells to stick together on a surface, containing “curli fibers.” According to the researchers, these curli fibers are used by E. coli -- a bacterium found in contaminated food that can be lethal -- to better attach to surfaces and can also be manipulated to include nanoparticles of gold.

http://www.ibtimes.com/futuristic-living...nt-1563176


Whoever thought of putting e-coli and gold together? damned.gif

That's crazy, why select a bacterium that is lethal? damned.gif I mean, don't they just require the biofilm and, if so, dental plaque may be able to do the job, I'm guessing. dunno.gif

http://www.colgateprofessional.com/patie...lm/article
04-02-2014, 12:32 AM #8
Octo Mother Superior
Posts:42,572 Threads:1,469 Joined:Feb 2011
Who the hell knows what they're fiddling with damned.gif



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