Polyimide DMAC high shear homogenizer

Polyimide fiber online powder liquid dispersion mixer, dimethylformamide (DMF) online powder liquid mixer, dimethylacetamide (DMAC) online powder liquid dispersion mixer, N-methylpyrrolidone online powder liquid mixer, polyimide or polyamic acid solution online mixer Specially designed for quantitative online mixing of solids and liquids with high requirements for dispersion quality. Accurate measurement of solid and liquid phases is required. Controlling the amount of raw materials can produce a ready-made product in only one channel.

Polyimide fiber, abbreviated as PI fiber, has a high aromatic ring density due to the molecular structure of polyimide, which contains
The phthalimide structure gives polyimide fibers high strength and high modulus characteristics, especially in terms of modulus.

The requirements for polyimide polymers in fiber manufacturing are extremely demanding. In addition to obtaining very high molecular weight, it also requires polymer solubilityUniformity, strict conditions are required for the feeding method and polymerization degree control during the process. The production of polyimide fibers includes
There are two methods: melt spinning and solution spinning.

There are two methods for synthesizing polyimides through solution spinning, one is to form them during the polymerization process or in macromolecular reactionsThe other method is to polymerize monomers containing imide rings into polyimides. Among the * synthesis methods, polyimide canUsing dianhydride and diamine in non protonated compounds such as dimethylformamide (DMF), dimethylacetamide (DMAC), N-methylpyrrolidone (NMP), etc
Low temperature condensation is first carried out in polar solvents to obtain intermediate polyacrylic acid solution, which is then heated to around * * 300 ℃ for intramolecular dehydration and ring closureTo Polyimide

Polyimide fiber online powder liquid dispersion mixer, dimethylformamide (DMF) online powder liquid mixer, dimethylacetamide (DMAC) online powder liquid dispersion mixer, N-methylpyrrolidone online powder liquid mixer, polyimide or polyamic acid solution online mixer

The high shear disperser instantly disperses and homogenizes immiscible solid, liquid, and gas phases uniformly and finely under the combined action of corresponding processing techniques and appropriate additives, and passes through high-frequency processingPipeline type high shear disperserThe cycle repeats itself, ultimately resulting in stable high-quality products.
The factors that affect the dispersion results are as follows

1. Form of dispersion head (batch and continuous) (continuous is better than batch)
2. Shear rate of dispersing head (the higher, the better the effect)
3 dispersed head tooth structure (divided into initial teeth, middle teeth, fine teeth, ultra-fine teeth, with fine teeth having better effect)
4. The residence time of materials in the dispersed wall and the emulsification dispersion time (can be regarded as the same motor, the smaller the flow rate, the better the effect)
5 cycles (the more, the better the effect, and by the end of the device's lifespan, it cannot be any better)

Calculation of linear velocity
The definition of shear rate is the relative velocity of the liquid layer between two surfaces.
–Shear rate (s-1)=Velocity (m/s)
G distance between stator and rotor (m)
As can be seen from the above, the shear rate depends on the following factors:
–Linear velocity of rotor
–In this case, the distance between the two surfaces is the rotor stator spacing.
The spacing range between SID stator and rotor is 0.2~0.4 mm

rateV=3.14 X D (rotor diameter) X speed RPM/60
High rotational speed and shear rate are important for obtaining ultrafine suspensions. According to some industry specific requirements, Hisilicon has developed the XRS2000 ultra high speed disperser based on the XR2000 series. Its shear rate can exceed 14000 rpm, and the rotor speed can reach 66m/s. Within this speed range, turbulence caused by shear forces combined with specially developed motors can enableThe particle size range is small to the nanometer levelThe shear force is stronger and the particle size distribution is narrower. Due to its extremely high energy density, no other auxiliary dispersing equipment is required.

Ultra high speed homogenizer disperserEquipment level: chemical grade, hygiene level I, hygiene level II, sterile grade
Ultra high speed homogenizer disperserMotor form: ordinary motor, variable frequency speed regulation motor, explosion-proof motor, variable frequency explosion-proof motor, pneumatic motor
Ultra high speed homogenizer disperserPower supply selection: 380V/50HZ, 220V/60HZ, 440V/50HZ
Ultra high speed homogenizer dispersertexture of material: SUS304 、SUS316L 、SUS316Ti
Ultra high speed homogenizer disperserSurface treatment: polishing, wear-resistant treatment
Ultra high speed homogenizer disperserImport and export connection forms: flange, screw, clamp

Polyimide DMAC high shear homogenizer