 Carbomorph discovery
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Conundrum
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Fri Nov 30 2012, 07:19PM
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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
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Carbon black has been around for decades yet it takes until now for someone to try mixing it with PCL?
Must try rinsing some of the surplus carbon black out of the debris from some broken Li-Ion cells I gutted, and testing it to see if that works.
EDIT:- Tried this just now, used Humbrol "Liquid Poly" as a softener to try and get the polymorph adequately mixed with the carbon black and graphite.
I estimate the content so far to be around 15% but its still reading as non conductive.
Tried kneading the plastic while hot to distribute the granules, but so far nothing on my meter's highest range.
EDIT:- Need to use dichloromethane to make the polymorph mix adequately with the carbon black.
Might work with acetone, I've dissolved PCL in this before and it works when painted onto a surface.
EDIT 2:- Adding a mixture of gallium and indium in a very small (1%) percentage to the carbon might cause the conductivity to go up as the alloy intermixes with the carbon grains and forms conductive pathways between them.
Reading up on the GaIn wire "discovery" it occurs to me that bismuth, indium and tin (BiInSn) with a melting point of 59c might work for some applications as at the temperature of extrusion the metals would liquefy and thus form a continuous wire.
Once set the brittleness of the metal would be offset by the carbon and plastic content much like an optical fibre.
Has anyone else attempted to do this yet?
-A
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