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Old Sep 04, 2012, 08:40 PM
Guz
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Tempe, AZ
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Wood pulp stronger than CF or Kevlar?

This is interesting,

Wood pulp extract stronger than carbon fiber or Kevlar (www.gizmag.com)
The Forest Products Laboratory of the US Forest Service has opened a US$1.7 million pilot plant for the production of cellulose nanocrystals (CNC) from wood by-products materials such as wood chips and sawdust. Prepared properly, CNCs are stronger and stiffer than Kevlar or carbon fibers, so that putting CNC into composite materials results in high strength, low weight products. In addition, the cost of CNCs is less than ten percent of the cost of Kevlar fiber or carbon fiber. These qualities have attracted the interest of the military for use in lightweight armor and ballistic glass (CNCs are transparent), as well as companies in the automotive, aerospace, electronics, consumer products, and medical industries.
Sounds interesting
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Old Sep 04, 2012, 10:27 PM
Just fly it!
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Cody, WY
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Very interesting. Just don't get it wet!
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Old Sep 04, 2012, 10:57 PM
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Awesome, interesting read.
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Old Sep 04, 2012, 11:04 PM
Good Better Best quest.
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Australia, VIC, Cranbourne East
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Hemp fibre is also tops imho .
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Old Sep 05, 2012, 12:31 AM
A witty saying proves nothing.
kcaldwel's Avatar
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It's already in production in Canada:

http://www.celluforce.com/en/product_properties.php

No cloth or uni yet I don't think...

Kevin
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Old Sep 05, 2012, 08:18 AM
Keep it Simple Stupid
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United States, NC, Raleigh
Joined Jul 2011
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Woo hooooo! Abundant, renewable raw material availability. Ya, the water thing sucks, but...

Quote:
Another is to alter the surface chemistry of the cellulose so that it becomes hydrophobic, or water-repelling. This is easy enough to do, but will likely substantially degrade the mechanical properties of the altered CNCs
Even if it's strength is reduced to that of Carbon/Kevlar, the huge cost difference will make it very attractive to this crowd

Quote:
A near-term goal for the cost of CNCs is $10 per kilogram, but large-scale production should reduce that figure to one or two dollars a kilo.
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Old Sep 05, 2012, 09:58 AM
A witty saying proves nothing.
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Molt Taylor made parts of his full size airplanes using a composite of kraft paper and epoxy. Once the composite is embedded in a matrix, water probably makes little difference for an airplane. A boat might be another matter. Even boats have used balsa cores for decades, although there can be issues.

http://www.mini-imp.com/taylor_paper..._%28tpg%29.htm

Kevin
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Old Sep 05, 2012, 11:54 AM
I think I'm inverted. Maybe.
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United States, CA, Pacifica
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The only thing I'm worried about is the imminent confusion between the CAD guys that use CNC and the glider guys building with CNC.
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Old Sep 07, 2012, 07:47 AM
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Canada, ON, Cottam
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There you go, I was a CNC setup/operator for 30 years, now I can fly and add to my resume. I think the waterproofing properties could be remedied by a coat of paint. It sounds like fine sawdust mixed with epoxy or polyester might work for an experiment. Maybe when you crash the Hemp planes it will crash and burn with good effect? Paper Machier.
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Old Sep 07, 2012, 11:12 AM
yyz
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USA, CA, Paso Robles
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Quote:
Originally Posted by acetech09 View Post
the only thing i'm worried about is the imminent confusion between the cad guys that use cnc and the glider guys building with cnc. :d
+1.

Anyone else flash back to high school chemistry after seeing this?
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Old Sep 10, 2012, 02:28 PM
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United States, OR, Portland
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Quote:
Originally Posted by yyz View Post
+1.

Anyone else flash back to high school chemistry after seeing this?
Noooo don't make me memorize the Kreb cycle! haha
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