In the manufacturing fields of modern pharmacy, biotechnology, food and beverage, cosmetics and nanomaterials, higher and higher requirements are put forward for the particle size distribution, stability and bioavailability of lotion, liposome, suspension, cell breakage and other systems. Although traditional high-pressure homogenizers can achieve a certain degree of refinement, they have limitations in terms of uniformity, repeatability, and shear control. As an advanced homogenization technology based on fixed geometric channel microreactors, the microjet homogenizer has become a core equipment for achieving high uniformity and stability dispersion systems due to its unique "jet impact" principle and nanoscale processing capability.

1、 Working principle: The leap from "mechanical shearing" to "jet impact"

The working principle of microjet homogenizer is different from traditional rotor stator or valve homogenizer, and its core lies in microjet technology. This technology utilizes ultra-high pressure (usually 100-400 MPa) to pump the pre treated liquid into a micro fixed channel called a "micro jet interaction chamber".

The interior of the interaction room is composed of two or more micro sized (usually 50-200 μ m) channels that intersect at specific angles (such as "Y" or "Z" shapes). When high-pressure liquid passes through microchannels, the flow velocity increases sharply (up to several hundred meters per second), generating strong cavitation effects, high-frequency shear, and turbulence. The most crucial thing is that two or more high-speed jets collide in opposite directions at the intersection area, and their kinetic energy is instantly converted into pressure energy and thermal energy, causing particles or droplets to be crushed to the nanometer level (usually 50-200 nm) in a very short time and achieving a highly uniform particle size distribution.

This process is completed in a closed and controllable microchannel, avoiding pollution caused by mechanical wear, and has high energy utilization efficiency and precise particle size control.

2、 System composition and core technology:

1. High pressure pumping system: Typically, multi-stage plunger pumps are used to pressurize the liquid to the set pressure. Pressure can be precisely adjusted and is a key parameter for controlling homogeneous strength.

2. Micro jet interaction chamber (core component): precision machined from high-strength materials such as hard alloys, ceramics, or special stainless steel, with fixed internal microchannel geometry to ensure consistent fluid dynamics conditions for each treatment. The interactive room is detachable and replaceable, suitable for different viscosities and processing needs.

3. Cooling system: During the homogenization process, a large amount of heat is generated. The built-in heat exchanger or external cooling circulation device can effectively control the temperature of the feed liquid and prevent the deactivation of heat sensitive substances (such as proteins and cells).

4. Feeding and collection system: including feeding tank, filter, discharge collection container, some models are equipped with online circulation devices, which can achieve multiple homogenization treatments.

5. Control system: Equipped with a touch screen or PLC controller, it can set parameters such as pressure, temperature, processing times, flow rate, etc., monitor the operating status in real time, and ensure process reproducibility.

3、 Technical advantages and performance characteristics

1. Ultra high homogenization efficiency and nanoscale particle size

It can reduce the particle size of lotion, liposome, suspension and other systems to less than 100 nm, have low PDI (polydispersity index) and uniform distribution, and significantly improve the stability and transdermal/absorption performance of the system.

2. High consistency in handling

The interaction chamber with a fixed geometric structure ensures a fluid path for each processing, suitable for GMP production.

3. Gentle treatment to protect active ingredients

Compared to high shear homogenization, the microjet process is more controllable and causes less damage to biomolecules such as proteins, nucleic acids, and cell membranes. It is widely used in biopharmaceuticals.

4. Strong scalability

The laboratory type and production type equipment adopt the same principle and interactive room design, and the process parameters can be linearly amplified to shorten the conversion cycle from research and development to production.

5. Wide application range

It can handle water phase, oil phase, high viscosity materials, solid containing systems, and is suitable for various functions such as homogenization, emulsification, dispersion, cell lysis (such as bacteria and yeast), and preparation of nanomaterials.

4、 Typical application scenarios

-Pharmaceutical and Biotechnology:

-The preparation of liposome drugs (such as mRNA vaccines and anticancer drugs) ensures uniform particle size and high encapsulation efficiency.

-Stabilization of nanosuspensions (such as poorly soluble drugs).

-Cell lysis and protein extraction for recombinant protein and vaccine production.

-Food industry:

-Produce stable and delicate tasting dairy products, plant-based milk, and seasoning sauces.

-Improve the bioavailability of functional components such as vitamins and polyphenols.

-Cosmetics:

-Prepare nano lotion and microemulsion to improve the permeability and stability of skin care products.

-Produce transparent, low irritation essence liquid and sunscreen.

-Nanomaterials:

-Dispersion of graphene and carbon nanotubes.

-Preparation and surface modification of nanoparticles.

5、 Selection and usage suggestions

When selecting, it is necessary to consider:

-Processing capacity (laboratory type: 0.1-2 L/h; Production type: can reach thousands of L/h.

-Maximum working pressure (determining homogeneity strength).

-Interaction room type (Y-shaped suitable for emulsification, Z-shaped suitable for cell lysis).

-Material compatibility (whether it is corrosion-resistant and easy to clean).

Regularly clean the system during use to prevent blockage; The interaction room is a precision component that requires careful maintenance; Pre filtration is required when handling high viscosity or solid containing materials.

The micro jet homogenizer represents the advanced level of high-pressure homogenization technology, and its "jet impact" principle breaks through the limitations of traditional mechanical homogenization, achieving a leap from micrometer to nanometer. It is not only a powerful tool for laboratory research and development, but also a key equipment for ensuring product quality and consistency in industrial production.