Definition
Vacuum high-speed disperser is a mechanical equipment used for efficient mixing, dispersing, homogenization and defoaming of materials in a vacuum environment. It is widely used in laboratories and production links in various industrial fields such as chemicals, coatings, food, and new energy materials.
How it works:
The equipment is mainly composed of vacuum system, high-speed dispersion system and control system. When working, the material is placed in a closed container, and the vacuum pump reduces the air pressure in the container to the set value to reduce bubble generation and promote defoaming. The dispersion motor drives the dispersion disc to rotate at high speed, generating strong shear and impact effects, so that the material particles or droplets are refined and evenly dispersed in the medium. The dispersion effect can be controlled by adjusting the rotation speed, vacuum and processing time throughout the process.
Measurement method
Dispersion is usually evaluated according to relevant industry standards by measuring parameters such as particle size distribution, viscosity and stability of the material. For example, a laser particle size analyzer is used to measure particle size, a rotational viscometer is used to measure the viscosity change of the system, and dispersion stability is evaluated by standing observation or centrifugal testing. These measurements are performed under standard environmental conditions to ensure comparable results.
Influencing factors
The dispersion effect is affected by a variety of factors. The rotation speed of the dispersion disc directly affects the shear force, and insufficient rotation speed may lead to uneven dispersion, and too high may cause temperature rise or material denaturation. Vacuum affects bubble removal efficiency, and proper vacuum helps reduce porosity defects. Material properties such as initial particle size, solids content, and viscosity can also affect the dispersion process. In addition, processing time and temperature control are also critical parameters that need to be balanced.
Applications:
This equipment is suitable for a variety of process scenarios that require efficient mixing and defoaming. In the coating industry, it is used for the uniform dispersion of pigments and bases; in the field of electronic materials, it is used in the preparation of conductive pastes; In the food industry, it is used for the homogenization of sauces and emulsified products; In the chemical industry, it is used for the dispersion of nanomaterials and composites. Its vacuum environment characteristics are particularly suitable for bubble-sensitive systems.
Key points of selection
When selecting a model, it is necessary to comprehensively consider the process requirements and equipment parameters. First, determine the compatibility between container volume and material according to the material characteristics and throughput. Secondly, the motor power and speed range are selected according to the target dispersion fineness to ensure sufficient shear energy. The performance of the vacuum system needs to meet the requirements of process defoaming. The control system should have the functions of precise parameter adjustment and process recording. In addition, the safety protection design and maintenance convenience of the equipment are also important considerations.