Definition
Laboratory line emulsifier is an in-line continuous processing equipment used to achieve efficient mixing and dispersion of liquid or liquid and solid phases. Its core function is to form a uniform and stable emulsification system through mechanical action in the process of fluid transportation, which is suitable for laboratory-scale small-batch continuous process research.
How it works:
The device is based on the principle of high-speed shearing combined with the hole effect. When working, the material is continuously passed through the stator and rotor system with precision structure driven by the pump. The rotor generates strong mechanical shear force when rotating at high speed, so that the fluid can withstand high-frequency shear in a narrow gap. At the same time, the periodic pressure change formed between the stator and rotor cogging causes the hole phenomenon, resulting in local high-pressure shock and micro-jet. These two mechanisms work synergistically to continuously break and refine the dispersed phase particles or droplets, and finally form a uniform emulsification system with a narrow particle size distribution.
Measurement and evaluation methods
The evaluation of emulsification effect is usually based on the analysis of the physical and chemical properties of the output material. The particle size distribution can be measured by laser diffraction, which characterizes parameter D50and span values can reflect the emulsification uniformity and stability. The stability of the system can be observed by centrifugal sedimentation experiments or multiple light scattering techniques. In addition, the monitoring of physical parameters such as viscosity and conductivity can also assist in judging the emulsification state. For relevant test methods, please refer to the guidance on emulsification system characterization in standards such as ASTM E3247.
Influencing factors
The emulsification effect is affected by multiple process and material parameters. Equipment factors include stator and rotor structure design, clearance accuracy, shear rate, and residence time of material in the chamber. The process parameters cover the processing temperature, feed flow, number of cycles, and the energy density of the input. The characteristics of the material itself, such as the two-phase viscosity ratio, interfacial tension, solids content or oil-water ratio, and whether additives such as surfactants are used, will have a significant impact on the particle size and stability of the final emulsion.
Applications:
Laboratory pipeline emulsifiers are widely used in research and development processes that require fine emulsification, dispersion or homogenization processes. In the food industry, it is used to prepare sauces, dairy products and beverage emulsions. In the chemical field, it is used in the production of nanoemulsions, coatings, inks and polymer composites. In the daily chemical industry, it is used to develop emulsification systems for skin care products, shampoos and other products. In addition, it is also used in laboratory research and development in the fields of new energy materials and textile additives, and is also used for the dispersion and homogenization treatment of slurries.
Selection considerations
When selecting the model, it is necessary to comprehensively consider the experimental needs and match the equipment performance. First, the properties of the treated materials, such as corrosiveness, viscosity, solid content and shear sensitivity, should be clarified to determine the material resistance and structural strength of the equipment contact parts. Secondly, according to the target particle size range and processing volume, the shear strength, flow range and pressure control function of the equipment are evaluated. Modular design, easy cleaning and disassembly, and integration with existing piping systems are also important practical considerations. It is recommended to verify the suitability of the equipment for a specific process through small-batch material testing.