Carbon nanotube conductive slurry production solution – nano sand mill

Carbon nanotube slurry is a material with special properties and wide application prospects, the following are the main raw materials: Carbon nanotube, N-methylpyrrolidone (NMP, commonly used solvent)

Carbon nanotubes, also known as bucky tubes, are special one-dimensional quantum materials that are nanoscale in radial direction and micrometer in axial direction, basically sealed at both ends, and are crimped by graphene sheets. It was divided into single-walled (SWCNTs) and multi-walled (MWCNTs) according to the number of layers.

N-methylpyrrolidone, NMP for short, is a colorless transparent oily liquid with a slight amine taste. Its density is 1.028 (25 degrees), low viscosity, good stability, high polarity, low volatility, can be miscible with water and other moisture absorption, sensitive to light. Flammable, decomposition will produce toxic gas, water content of 50% and temperature above 50 degrees corrosive.

From the early 1990s, carbon nanotubes were first prepared and reported, to today’s production technology is gradually mature, conductive agent market demand is also growing, the use of Yiler nano sand grinding mechanism to prepare carbon nanotubes conductive slurry has the following advantages: 1, high dispersion efficiency: The internal high-speed rotation of the dispersion disc drives the grinding medium to stir strongly, impact the slurry, effectively break the carbon nanotube agglomeration, achieve uniform dispersion, improve the stability and conductivity of the slurry, and the time is short and the efficiency is high.
2, particle size precision control: by adjusting the medium particle size, speed and other parameters, can accurately regulate the size of carbon nanotubes, to meet diverse needs.
3, good surface treatment: grinding medium and carbon nanotubes friction collision, treatment of its surface, increase the active group, improve the compatibility with the binder, solvent and other ingredients in the slurry, optimize the performance of the slurry.
4, large-scale production advantages: large processing capacity, continuous access to materials, automated operation, in line with the needs of industrial large-scale production, to ensure consistent product quality.
5, low pollution: its closed design reduces pollution, the medium and slurry can be recycled, both environmental protection and economy.

Process description: carbon nanotube conductive paste is made of carbon nanotubes, dispersant and solvent. During production, the qualified NMP, PVP and carbon nanotubes are put into the blender to mix, and then ground and disperse through the sand mill and the blender several cycles. When the particle size of the carbon nanotubes reaches 2-7um and the viscosity meets the standard, the finished product is obtained, and then the filling is carried out. No heating, no chemical reaction, carried out in a closed environment, no particulate matter, only a small amount of organic waste gas due to the volatilization of N-methylpirolidone.