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Discussion Starter · #1 ·
Hey guys. i'm tired of waiting for graphene cooling products
so i have sharpen My sword , to slice the pie of this miracle material and feel the graphene revolution.

i have successfully made huge amounts of graphene from pencil lead. but quality was poor .
and i could not find a useful way to put it in cooling .

so i did order :
(175 ml) of Water base Single Layer Graphene Oxide
And
100ml of Ultra-high Graphene Nanoplatelets





My Goal is to Find the best way to exploit the high thermal conductivity of graphene

So the fist step to do a successful experiment is to find out what you have in hand :

-graphene is a 2D material : you cant make a 3D block of it like copper or other material...

Graphene is Extremely High Thermal Conductivite : The RT thermal conductivity in the range 1750 - 5800 W/mK (copper silver range : 300-450)

Graphene Oxide is not Conductivite and have a low Thermal Conductivity , However there's a lot of Easy Reduction of Graphene Oxide and Gain back the Thermal Conductivity of Graphene thru Heat (100°c cooking for a long time , Light : Camera Flash or UV , Or CVD )

Coating any metal with Graphene Oxide or Graphene makes it corrosion proof
Coating any metal with Reduced Graphene Oxide or Graphene makes it 25-50 % more Thermal Conductivite .

high quality graphene is Very expensive . 1L of high quality graphene Oxide = 1000 $

the small amount of graphene i order cost around 350-400 $ .

So i have in mind 4 Ways to make this Cooling Experiment worth the money i spent.

1 ) electrolysis coating of the copper Cpu block



although i never heard electrolysis coating with graphene but i will give it a try with the graphene Oxide.
the basic method is to test with a copper tube in the first pole and in the other pole i will use a copper tube coated with graphene Nanoplatelets and i will dip them in a graphene Oxide CuSo4 solution and play with the voltage to make copper forme on the graphene layer and if copper is successfully formed i will put an other graphene layer and try the same process
until a good copper graphene Sandwich is at hand
graphene Sandwich copper-graphene is about 50% stronger than titanium, or about three times as strong as structural aluminium alloys.
copper graphene Sandwich :

Quote:
After examining the grain sizes in copper before and after adding graphene, the researcher found that chemical vapor deposition of graphene conducted at high temperature stimulates grain size growth in copper films. The larger grain sizes in copper coated with graphene results in better heat conduction. http://ucrtoday.ucr.edu/20982


2) graphene Oxide simple Coating (dip coating method or spin coating )

using graphene Oxide i will Coat the copper block and cook is in a microwave at 100 °c

this will give us a bad thermal conductivity yet it's better than copper
tongue.gif


3) Nanofluid base graphene .
graphene is very expensive
so using a small loop of graphene Nanofluid
using Plate Heat Exchanger to pass the heat to a water loop

what a Plate Heat Exchanger :

Quote:
Used in various industries, plate heat exchangers provide highly efficient heat transfer between two liquids without allowing them to mix. Koolance plate heat exchangers are among the most compact and cost effective available.
The HXP-193 is made of copper-brazed stainless steel and plated externally in nickel. A detachable heavy steel mounting bracket and screws are included. G 3/8 BSP threads.


4) a sample thermal paste based on graphene

first and most important thing i'm here for is To hear your ideas and to seek help from your beautiful minds
Mod's that overclock.net membres have made are clever and smart . so there's not better place than here to find help

 

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Discussion Starter · #3 ·
First try sample coating of graphene butyl acetate ( this ***** is toxic and my eyes burns and My nose is pretty irritated )

the coating did stick at first , than i decided to sand it with a sandpaper after 20-30 times the layer is gone , thats pretty good for 5 minutes of drying time

 

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Quote:
Originally Posted by HitMe View Post

First try sample coating of graphene butyl acetate ( this ***** is toxic and my eyes burns and My nose is pretty irritated )

the coating did stick at first , than i decided to sand it with a sandpaper after 20-30 times the layer is gone , thats pretty good for 5 minutes of drying time
Try using a dust mask or preferably a surgical mask and some elasticated goggles that should stop as much chemicals getting to your eyes and mouth area.
 

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Discussion Starter · #6 ·
Quote:
Originally Posted by richie_2010 View Post

For your thermal paste option could you not buy a tube a paste and mix it with the graphene.
i will try that with ic diamond 7

Quote:
Originally Posted by KaffieneKing View Post

Try using a dust mask or preferably a surgical mask and some elasticated goggles that should stop as much chemicals getting to your eyes and mouth area.
i have stopped doing coating with the graphene base acetate ,i did not noticed the "Solvent: N-Butyl acetate" in the web site .
so i did give a small try with graphene oxide it's water based

i have only one way yo make reduced graphene oxide , i would call this the "Barbecue coating method"
tongue.gif

on a kerosene heater , i have placed the copper block after i have cleaned it with acetone and vinegar .
then , i have startred to paint the surface with a small painting brush .

results was extraordinary ..... after a couple of hundred full surface brushing
a gray color start to appear :
and the final result strong layer of pure graphene is formed , in the previous try with graphene-acetate the coating worn off very fast with sandpaper

this time is solid :




Edit :after an intense polishing with 5000 sandpaper the graphene still there and the block became a mirror-like surface ;


 

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Quote:
Originally Posted by HitMe View Post

i will try that with ic diamond 7
i have stopped doing coating with the graphene base acetate ,i did not noticed the "Solvent: N-Butyl acetate" in the web site .
so i did give a small try with graphene oxide it's water based

i have only one way yo make reduced graphene oxide , i would call this the "Barbecue coating method"
tongue.gif

on a kerosene heater , i have placed the copper block after i have cleaned it with acetone and vinegar .
then , i have startred to paint the surface with a small painting brush .

results was extraordinary ..... after a couple of hundred full surface brushing
a gray color start to appear :
and the final result strong layer of pure graphene is formed , in the previous try with graphene-acetate the coating worn off very fast with sandpaper

this time is solid :

Edit :after an intense polishing with 5000 sandpaper the graphene still there and the block became a mirror-like surface
Could you not use a blow torch? Like a cooks one? Obviously if you don't have access to one this isn't helpful! Might be easier and safer to replicate depending on how hot you need it to get? Results look good
biggrin.gif
 

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Discussion Starter · #8 ·
Quote:
Originally Posted by KaffieneKing View Post

Could you not use a blow torch? Like a cooks one? Obviously if you don't have access to one this isn't helpful! Might be easier and safer to replicate depending on how hot you need it to get? Results look good
biggrin.gif
i used this heater


it was quick test
smile.gif


blowtorch are unavailable in my country
frown.gif

using the blow torch will damage the graphene sheets

i will try with the pcb heating plate tomorrow or with the heat gun
 

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i'm assuming you already know they sell graphen thermal paste.

EDIT: also the who beautiful minds things comes off a bit "odd" also Overclock.net also has some of the most misinformed and immature users as well.

that said graphene is some pretty darned cool stuff.
 

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Discussion Starter · #10 ·
Quote:
Originally Posted by cdoublejj View Post

i'm assuming you already know they sell graphen thermal paste.

EDIT: also the who beautiful minds things comes off a bit "odd" also Overclock.net also has some of the most misinformed and immature users as well.

that said graphene is some pretty darned cool stuff.
some minds like Kevan : Zawarudo
wink.gif
too bad we lost him :'( .
 

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Discussion Starter · #11 ·
i had a problem with all the coating i did to the block
the graphene worn off with vinegar or water ...
so i had to protect it with a thin layer of copper

Electrolysis works like charm ... :

 

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Most interesting, Im contemplating to do the opposite of you, to coat carbon body with copper and use that material as computer case.
As much I have figured out graphene is thermaly conductive in its 2D lattice, so... it would need to be having contact with CPU at one end of it and transfer heat to another way.
Instead of electroplating copper block... why not try to electroplate really dense seandwitch of really thin copper straws/wire, something that would look like cut in middle really fat cable? or maybe try some dense copper sponge and electroplate it with graphene.

Plus did I miss something but in pencils is mix of graphite and clay, graphene is there in graphite in traces but to get it you need to process graphite and separate it out.

Check youtube, there are really handy DIY make your self carbon, graphite and graphene process Il try this summer, not all requiere high temperature furnaces thank God...

Plus
This make me thinking... When you are playing with electroplating atm could you do some testing and trying to do some electropolish onto lapped metal surface??? Im really interested to try some electropolish onto lapped heatsinks and what kind of effect onto heatsink heat transfer will that have
smile.gif


EDIT:
plus when you electroplate... it would be handy to have ... the surface of side that is giving away material at last of equal surface and in direct opposite to surface you are coating, that way material plating should plate equally.
Plus when electroplating copper use Copper(II) sulfate, can be bought enywhere and is cheap

Edit: damn Im ussing to much plus...
 

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Discussion Starter · #13 ·
Quote:
Originally Posted by Hrv123 View Post

Most interesting, Im contemplating to do the opposite of you, to coat carbon body with copper and use that material as computer case.
As much I have figured out graphene is thermaly conductive in its 2D lattice, so... it would need to be having contact with CPU at one end of it and transfer heat to another way.
Instead of electroplating copper block... why not try to electroplate really dense seandwitch of really thin copper straws/wire, something that would look like cut in middle really fat cable? or maybe try some dense copper sponge and electroplate it with graphene.

Plus did I miss something but in pencils is mix of graphite and clay, graphene is there in graphite in traces but to get it you need to process graphite and separate it out.

Check youtube, there are really handy DIY make your self carbon, graphite and graphene process Il try this summer, not all requiere high temperature furnaces thank God...

Plus
This make me thinking... When you are playing with electroplating atm could you do some testing and trying to do some electropolish onto lapped metal surface??? Im really interested to try some electropolish onto lapped heatsinks and what kind of effect onto heatsink heat transfer will that have
smile.gif


EDIT:
plus when you electroplate... it would be handy to have ... the surface of side that is giving away material at last of equal surface and in direct opposite to surface you are coating, that way material plating should plate equally.
Plus when electroplating copper use Copper(II) sulfate, can be bought enywhere and is cheap

Edit: damn Im using to much plus...
sorry i did not read your post i did removed my cpu block to do an actual test .

to do a good electroplate you will need CuSo4 if you gona make a copper plate

nikel is the best plating
tongue.gif

i did try to electroplate small Ram heatsink the plate was Sticky and slime like you can wipe it out with fingers ...
i will try more test for you my friend but trust me its very fun to electroplate
tongue.gif


but here's what i have realized , graphene cannot be electroplated to other metals .
trying to electroplating copper to graphene is worthless , vinegar or CuSo4 or water will wash off the graphene

Graphene oxide is non conductive .... so this leave only one way to use graphene simple coating with a blade and graphene thermal paste

i did coat My XSPC RayStorm with Graphene and sand it . first run in prime95 is not very good i had lower temps

cooling is not Steady

at 3.9 Ghz normal clock

Code:

Code:
A                MAX                   OLD A 
Core1                 47                50                           54
Core 2                51                54                           56
Core 3                48                51                           52
Core 4                48                50                           57
2-4 degrees celsius extra cooling

overclocking 4.5 Ghz 1.3 V : ( odd result )

Code:

Code:
A                            Max

Core 1                   57                       58
Core 2                   62                       66
Core 3                   61                       64
      Core4                    62                       63
OLDA : NAN




i got a little bumpy surface , so i did polishing :





 

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Hmmm... electroplating copper wire bundle with pure carbon ( or graphite rod from old accumulator battery ?) and then heating that up until that graphite turns into graphene? Dont use oxide version. There are recipes on youtube for that. Think that one only uses basic oven for couple of days. Will have to recheck all that again
smile.gif
 

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Interesting read...but I have some doubts...for similar reasons I became interested in Panasonic's PGS (pyrolytic graphite sheets), they like wise offer very high conductivity values in a 2D plane.

It is very easy to be seduced by these high conductivity values until you actually do the maths.

The problem is these sheets of PGS are very thin and I guess the thickness of your coating layers are also thin. When you consider the total amount of heat energy that can be moved in the 2D plane of these sheets for a given heat delta then this is a product not only of the conductivity value but also of the area of the 2D plane the heat is moving through ie the area of the edge of the coating material or film which is very low......so when you put these figures into an equation you will find that the heat moved by such coatings is really minimal because of their thinness.
 

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Discussion Starter · #17 ·
Quote:
pure Graphene and Graphene Oxide is not Toxic it's the base that may be the poison , the 2D graphene layer is very thin and human-cells don't know if its even there. and there's a big future development in materials and biomedical sciences.
in large quantity yes toxic . still i'm not gona eat it
tongue.gif


Quote:
Originally Posted by technogiant View Post

Interesting read...but I have some doubts...for similar reasons I became interested in Panasonic's PGS (pyrolytic graphite sheets), they like wise offer very high conductivity values in a 2D plane.

It is very easy to be seduced by these high conductivity values until you actually do the maths.

The problem is these sheets of PGS are very thin and I guess the thickness of your coating layers are also thin. When you consider the total amount of heat energy that can be moved in the 2D plane of these sheets for a given heat delta then this is a product not only of the conductivity value but also of the area of the 2D plane the heat is moving through ie the area of the edge of the coating material or film which is very low......so when you put these figures into an equation you will find that the heat moved by such coatings is really minimal because of their thinness.
mixing Graphene with paint reduced heat 16 °c

i will do some painting to my radiators
tongue.gif

 

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That's not really proof of your argument......that coating is just enhancing the emissivity of the surface....shiny metal surfaces are known to have a low emissivity and the graphene coating is just improving on that.....also the power source is just 12w...hardly comparable to an Oced core i7.

Emissivity is not comparable to conductivity and the amount of heat energy that can be moved by such a thin layer of graphene which is the problem with your proposal......but good luck with it anyways
thumb.gif
 

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Discussion Starter · #19 ·
Quote:
Originally Posted by technogiant View Post

That's not really proof of your argument......that coating is just enhancing the emissivity of the surface....shiny metal surfaces are known to have a low emissivity and the graphene coating is just improving on that.....also the power source is just 12w...hardly comparable to an Oced core i7.

Emissivity is not comparable to conductivity and the amount of heat energy that can be moved by such a thin layer of graphene which is the problem with your proposal......but good luck with it anyways
thumb.gif
thats true , the gain is not a full thermal conductivity of graphene , but 25% is great
Graphene Enhances Efficiency of Heat Spreaders by 25 Percent

in my case the coating is like thermal paste .
but a gain of 4-3 degree celsius over ic7 diamond thats great .

i will mix the Graphene with acrylic based paint and repaint the radiators to see the difference
 

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hmm... how about making open reach graphene pump? I mean...

You dismantle your cover from cpu, fix some other cover with pump that will make your graphene flow directly from cpu to heatsink and that would make your graphene take out all the temp directly from cpu. Also idea is to make a hybrid cooling solution from graphene and ln2 that will make your graphene flow in copper pipe torough ln2 tank, it will cool down graphene in slice of time and such cold graphene would hit ur cpu, then pumped out back to ln2 tank and again.

the openflow of graphene would make temp transfer even better without cover, graphene block would be sticked to cpu pcb with silicone or other non damaging glue.

 
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