I. background:

With the rapid development of the industry, especially the use of raw materials of higher and higher grades, for example, nanomaterials are gradually promoted to use, in terms of mixing efficiency, effect and quality requirements for mixing are also higher and higher.

Broadly speaking, nanomaterials are materials that have at least one dimension at the nanoscale (1-100nm) in three dimensions or that are composed of them as basic units. Nanomaterials, also known as ultramicrogranular materials, are composed of nanoparticles. Nanoparticles, also known as ultrafine particles, are in the transition region between the atom cluster and the macroscopic object. From the perspective of micro and macro, such a system is neither typical micro system nor typical macroscopic system, but a typical human mesoscopic system.

In brief, nanomaterials have the following characteristics:

Surface and interface effects; Small size effect; Quantum size effect; Macroscopic quantum tunneling.

Nanometer powders are very prone to "agglomeration" for the following reasons. The agglomeration of nanometer powder refers to the phenomenon that the primary nanometer powder particles connect with each other to form larger particle agglomeration during the process of preparation, separation, treatment and storage.

1) In the process of nanalization of materials, a large amount of positive or negative charges are accumulated on the surface of new nanoparticles. These charged particles are extremely unstable. In order to become stable, they attract each other and reunite the particles.

2) In the process of nanalization, a large amount of mechanical energy or heat energy is absorbed, so that the surface of the newly formed nanoparticles has a relatively high surface energy. In order to reduce the surface energy, particles often reach a stable state through mutual aggregation, thus causing particle aggregation.

3) When materials are nano-sized to a certain size, the distance between particles is very short, and the van der Waals force between particles is far greater than the gravity of particles themselves, so particles tend to attract each other and reunite.

4) Due to the hydrogen bond on the surface of the nanoparticles, the adsorption wet bridge and other chemical bonds, the particles are also prone to adhesion and aggregation.

Used for power type lithium ion batteries as "Submicron or nanometer anode materials such as lithium iron phosphate or anode carbon”, when mixing, it encounters “Submicron or nanometer scale, which easily causes “mass flocculation”.The following solutions are proposed to solve the problems caused by the phenomenon of "mass flocculation", such as the difficulty in dispersing evenly, the difficulty in mixing evenly or the long time of stirring.

Selection of destructive stirring equipment:

Planetary dispersion grinding vacuum mixer; Grinding and dispersing (vacuum) mixer.

Non-destructive stirring equipment selection:

Planetary dispersion emulsified vacuum mixer; Planetary dispersion vacuum mixer (dual planetary power mixer); Planetary dispersion static vacuum mixer; Ultrasonic dispersion + mechanical agitation/dispersion/emulsification.

II. The "planetary dispersion emulsifying vacuum mixer" is recommended.

"High shear emulsification" has the best function of "high speed mixing, dispersion, rapid refining, dissolution, homogenization and emulsification" for nanoscale materials due to its unique working principle. Widely used, mature technology.

1. Principle: the two serrated dispersion disks installed on the high-speed dispersion axis (the same as the principle of the traditional planetary power mixer) and the emulsifying head on the high-speed emulsifying axis both make revolution and rotate; At the same time, combining the design of low clearance of double agitator, no dead Angle, strong kneading interference motion of low-speed agitator and up and down/left and right circulation motion, high speed shear dispersion of dispersion plate and emulsifying homogenization of emulsifying head, ensure the full dispersion, homogenization and mixing of materials.

2. The essence of this machine is "non-destructive stirring", which can well protect the stirred materials from being damaged.

3, Prominent advantages: good combination of the "planetary low speed impeller, low clearance, strong kneading movement and interference and control/up and down cycle movement", "increase the linear velocity of dispersed after 23 m/s , high shear disc having good effect of “break up", and "linear speed or high shear emulsification of 15 m/s" , respectively play its role, make the material (especially the nanoscale materials) to reach a new level: high efficiency, uniform and high quality.

4. Basic structure: