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How to Disperse Carbon Nanotubes?
1) Carbon Nanotube Dispersant / CNTs Alcohol Dispersant -- US4496:
The powdery polymer dispersant, based on our lab experimental results from numerous dispersants screened out, is particularly suitable for the carbon nanotubes to be dispersed in ethanol, isopropanol, n-butanol, Terpineol, etc., as well as suitable for N-methylpyrrolidone, N, N-di-methyl formamide, etc. dispersed in a polar solvent.

How to Disperse CNTs / How to Disperse Carbon Nanotubes:

Example - using US4496 dispersant to disperse CNTs:
1) Single-walled: US4496 should be 3 to 4 times 
the wt% of carbon nanotubes. For short and functional nanotubes, they are more easily dispersed in water, typically, the amount of dispersant can be reduced by 50%.
2) Multi-walled: US4496 should be 0.1 to 4 times of carbon nanotubes (corresponding diameter descending)--Example 1:
US4315 - dispersant is 20wt% of CNTs - to get 100ml with 3wt% CNTs dispersion, need 3g CNTs, 0.60g dispersant, 96.40g of deionized water; Example 2: US4300 - dispersant is 100wt% of CNTs - to get 100ml of 3wt% CNTs water dispersion, need 3g CNTs, 3g dispersant, 94g deionized water. For short and functional nanotubes, they are more easily dispersed in water, typically, the amount of dispersant can be reduced by 50%.
3) Step 1, add US4496 into water first. Step 2, when US4496 fully dissolved into water, then add CNTs. Step 3, finally subjected to ultrasonic (this requires the customer's own experience).
4) During ultrasonic processing, the dispersion may be heating up and blistering, therefore it is a good idea every 5min stopping, cooling, defoaming, and then continuing, total 30 minutes: 5min x 6 times.
5) After the end of the ultrasound, centrifuge the dispersion liquid, remove non-dispersed agglomerated particles. Centrifugal speed is 2000r/min, centrifugation time of 30 min. After centrifugation, the dispersion can be stable placement of more than six months.
CNTs Water Dispersants
2) Carbon Nanotube Dispersant / CNTs Ester Dispersant -- US4497:
This is a polymer dispersant solution product with a solid content of 45%. The solvent is a mixture of butyl acetate and ethylene glycol butyl ether. Based on our lab experimental results from numerous dispersants screened out, it is particularly suitable for carbon nanotubes to be dispersed in ester solvents such as ethyl acetate, butyl acetate, and the liquid epoxy resin.

How to Disperse CNTs / How to Disperse Carbon Nanotubes:

Example - using US4497 dispersant to disperse CNTs:
1) Single-walled: US4497 should be 3 to 4 times the wt% of carbon nanotubes. For short and functional nanotubes, they are more easily dispersed in water, typically, the amount of dispersant can be reduced by 50%.
2) Multi-walled: US4497 should be 0.1 to 4 times of carbon nanotubes (corresponding diameter descending)--Example 1: US4315 - dispersant is 80wt% of CNTs - to get 100ml with 3wt% CNTs dispersion, need 3g CNTs, 2.40g dispersant, 94.60g of deionized water; Example 2: US4300 - dispersant is 400wt% of CNTs - to get 100ml of 3wt% CNTs water dispersion, need 3g CNTs, 12g dispersant, 85g deionized water. For short and functional nanotubes, they are more easily dispersed in water, typically, the amount of dispersant can be reduced by 50%.
3) Step 1, add US4497 into water first. Step 2, when US4497 fully dissolved into water, then add CNTs. Step 3, finally subjected to ultrasonic (this requires the customer's own experience).
4) During ultrasonic processing, the dispersion may be heating up and blistering, therefore it is a good idea every 5min stopping, cooling, defoaming, and then continuing, total 30 minutes: 5min x 6 times.
5) After the end of the ultrasound, centrifuge the dispersion liquid, remove non-dispersed agglomerated particles. Centrifugal speed is 2000r/min, centrifugation time of 30 min. After centrifugation, the dispersion can be stable placement of more than six months.

3) Carbon Nanotube Dispersant / CNTs Water Dispersant -- US4498:
Excluded APEO, non-ionic surface active agent containing aromatic groups, the aromatic groups and carbon nanotube walls: good affinity and easily adsorbed on the wall.
The active substance content: 90%; The moisture (water) content: 10%; Cloud point: 68-70oC.
Based on our lab experimental results from numerous dispersants screened out, US4498 is particularly suitable for carbon nanotubes to be dispersed in water.

How to Disperse CNTs / How to Disperse Carbon Nanotubes:

Example - using US4498 dispersant to disperse CNTs:
1) Single-walled: US4498 should be 3 to 4 times 
the wt% of carbon nanotubes. For short and functional nanotubes, they are more easily dispersed in water, typically, the amount of dispersant can be reduced by 50%.
2) Multi-walled: US4498 should be 0.1 to 4 times of carbon nanotubes (corresponding diameter descending)--Example 1:
US4315 - dispersant is 20wt% of CNTs - to get 100ml with 3wt% CNTs dispersion, need 3g CNTs, 0.60g dispersant, 96.40g of deionized water; Example 2: US4300 - dispersant is 100wt% of CNTs - to get 100ml of 3wt% CNTs water dispersion, need 3g CNTs, 3g dispersant, 94g deionized water. For short and functional nanotubes, they are more easily dispersed in water, typically, the amount of dispersant can be reduced by 50%.
3) Step 1, add US4498 into water first. Step 2, when US4498 fully dissolved into water, then add CNTs. Step 3, finally subjected to ultrasonic (this requires the customer's own experience).
4) During ultrasonic processing, the dispersion may be heating up and blistering, therefore it is a good idea every 5min stopping, cooling, defoaming, and then continuing, total 30 minutes: 5min x 6 times.
5) After the end of the ultrasound, centrifuge the dispersion liquid, remove non-dispersed agglomerated particles. Centrifugal speed is 2000r/min, centrifugation time of 30 min. After centrifugation, the dispersion can be stable placement of more than six months.


Carbon Nanotube Dispersion Equipments:
(1) Ultrasonic dispersion device: ideal for laboratory-scale, low-viscosity media to disperse carbon nanotubes; (2) Grinding dispersion equipment: suitable for large-scale dispersion of carbon nanotubes, middle-viscosity media to disperse carbon nanotubes; (3) Combination method: "first grinding, second ultrasonic dispersion " can be efficiently and stably to disperse carbon nanotubes.

***Equipment capacity, dispersion volume, dispersion concentration also need to be considered...

Related Products:
CNTs Alcohol Dispersant, CNTs Ester Dispersant, CNTs Water Dispersant
 
Carbon Nanotube Dispersion Related Products
SWCNTs Doped with Ag in Water Dispersion
Short SWCNTs Doped with Ag in Water Dispersion
MWCNTs Doped with Ag in Water Dispersion
SWCNTs Water/Ethanol/Xylene Dispersion
Short SWCNTs Water/Ethanol/Xylene Dispersion
CNTs Water Dispersion, OD: 5-15nm
CNTs Ethanol Dispersion, OD: 5-15nm 
CNTs Isopropanol Dispersion, OD: 5-15nm
CNTs N-Butanol Dispersion, OD: 5-15nm
CNTs NMP Dispersion OD: 5-15nm
CNTs Water Dispersion, OD: 20-30nm
CNTs Ethanol Dispersion, OD: 20-30nm
CNTs Isopropanol Dispersion, OD: 20-30nm
CNTs N-butanol Dispersion, OD: 20-30nm 
CNTs NMP Dispersion OD: 20-30nm
CNTs Water Dispersion, OD: 50-80nm
CNTs Ethanol Dispersion, OD: 50-80nm
CNTs Isopropanol Dispersion, OD: 50-80nm
CNTs N-butanol Dispersion, OD: 50-80nm
CNTs NMP Dispersion OD: 50-80nm
CNTs Super Concentration,CNT with 15wt%
CNTs Dispersion for Thermal Radiation Coatings
CNTs Static Conductive Water-based Coating Dispersion
CNTs Graphene Mixed Water Dispersion
CNTs Graphene Carbon Black Mixed Water Dispersion
CNTs Graphene Silicon Mixed Water Dispersion
CNTs Graphene Silver Mixed Water Dispersion
SWCNTs PVP Coated
Short SWCNTs PVP Coated
MWCNTs PVP Coated, OD: <7nm
MWCNTs PVP Coated, OD: 20-30nm
MWCNTs PVP Coated, OD: 50-80nm
Graphitized MWCNTs PVP Coated, OD: 10-20nm
CNTs Alcohol Dispersant
CNTs Ester Dispersant
CNTs Water Dispersant


 

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