I want to use ionic surfactant (Sodium Dodecylbenzene Sulphonate) for MWCNT dispersion. Any chance of using a solvent for Sodium Dodecylbenzene Sulphonate and MWCNT that isn't water?
Dear Khan,
I suggest you to use 3 different types of solvents and based on your CNTs (dimensions, purity, C% etc...) i think you will receive good dispersions.
1. NMP (N-methyl pyrrolidone)
2. DMF (or DMA)
3. Solvent mixture (EtOH/Acetone in 1:1 v/v)
Cheers
@ David jensen....thanks,,,, not yet, but was thinking to use DMF ( Dimethylformamide)....Actually, before using it just need to confirm because as much as i try to finf , mostly water is sugggested but i am not able to use water due to rupture of mechanical properties of my composite material.
DMF is a good dispersing agent for CNTs:
http://www.nanointegris.com/skin/frontend/default/nano/downloads/How%20to%20Disperse%20NanoIntegris%20CNT%20Powders%20in%20Organic%20Solvents%20or%20Alternative%20Surfactant%20Solutions.pdf
I think sodium dodecylbenzene sulfonate is soluble in DMF but you should check before adding the CNTs.
Dear Khan,
I suggest you to use 3 different types of solvents and based on your CNTs (dimensions, purity, C% etc...) i think you will receive good dispersions.
1. NMP (N-methyl pyrrolidone)
2. DMF (or DMA)
3. Solvent mixture (EtOH/Acetone in 1:1 v/v)
Cheers
You could try to use for this purpose DMSO, N,N-dimethylacetamide or acetonitrile.
DMSO, N,N-dimethylacetamide or acetonitrile may be useful in this perpuse
@ Andreas Stefopoulos, Jeffrey Gilman , Abdulsamie Alta'ee, Alexander Tolstov,
Well, I already have results for good dispersion of mwcnt into dmf. But my question is that " is it possible to mix ionic surfactant (Sodium Dodecylbenzene Sulphonate) into DMF or either in any solvent as Sodium Dodecylbenzene Sulphonate is mentioned for water only.
SDBS should disperse fine in DMF. Here is a link of a study that used SDBS and DMF.
http://www.sciencedirect.com/science/article/pii/S0927775711008168
@ David Jensen .....thank you very much for assistance......it is fruitful conservation with you.
Dear Imran,
one important point not considered yet, does it make any sense to use surfactant in polar organic media. Use in water as dispersant is based on surface active properties, which will largely be lost. The surfactant will not improve interaction of DMF or NMP with the carbon nanotubes.
@ Titus Sobisch ....you are absolutely right...but the the matrix material which i am using is thermoseting and if i use water for surfactant it reduce mechanilly properties and oraginality of matrix is almost lost, i mean not in a good state .so the idea is y not try some organic solvent......may be it can serve the purpose
Very important discussion. I have learnt alot. In my case, dissolving 80% powdered SDBS in water for a household detergent has been challenging. A few powdered granules do not completely dissolve no matter how much i stir unless i leave the mixture for some time. Even though it dissolves eventually, when mixed with the rest of the ingredients as a primary surfactant to make the detergent, the resulting product is not transparent despite adding solubilisers like alcohol and sodium xylene sulfonate.
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