High Degree Vacuum De-Aeration High Speed Dispersion Mixer for Low Viscosity Paint, Coating, Chemcial

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What's the theory of ultrasonic sonochemistry?

This phenomenon is termed cavitation.

Cavitation is the formation, growth, and implosive collapse of bubbles in a liquid. Cavitational collapse produces intense local heating (5,000K), high pressures (1,000atm), enormous heating and cooling rates (>109K/sec) and liquid jet streams (400km/h). There are different means to create cavitation, such as by high-pressure nozzles, rotor-stator mixers, or ultrasonic processors. In all those systems, the input energy is transformed into friction, turbulences, waves and cavitation.

The fraction of the input energy that is transformed into cavitation depends on several factors describing the movement of the cavitation-generating equipment in the liquid.The intensity of acceleration is one of the most important factors influencing the efficient transformation of energy into cavitation.

Higher acceleration creates higher-pressure differences.

This in turn increases the probability of the creation of vacuum bubbles, instead of the creation of waves propagating through the liquid.Thus, the higher the acceleration the higher is the fraction of the energy that is transformed into cavitation.In case of an ultrasonic transducer, the amplitude of oscillation describes the intensity of acceleration.

Higher amplitudes result in a more effective creation of cavitation. In addition to the intensity, the liquid should be accelerated in a way to create minimal losses in terms of turbulences, friction and wave generation. For this, the optimal way is a unilateral direction of movement. This makes ultrasound an effective means for the dispersing and deagglomeration but also for the milling and fine grinding of micron-size and sub micron-size particles.

In addition to its outstanding power conversion, ultrasonication offers full control over the parameters of amplitude, pressure, temperature, viscosity and concentration. This offers the possibility to adjust all these parameters with the objective to find the ideal processing parameters for each specific material.

This results in higher effectiveness and optimised efficiency.

Description:

Industrial Implementation of Ultrasound Ultrasonic processing of particles allows processing all particles evenly.

RPS-SONIC's industrial ultrasonic processors are commonly used for inline-sonication.Therefore, the suspension is pumped into the ultrasonic reactor vessel. There it is exposed to ultrasonic cavitation at a controlled intensity. The exposure time is a result of the reactor volume and the material feed rate. Inline sonication eliminates bypassing because all particles pass the reactor chamber following a defined path.

As all particles are exposed to identical sonication parameters for the same time during each cycle, ultrasonication typically shifts the distribution curve rather than widening it. Generally, 'right tailing' cannot be observed at sonicated samples. The option of repeated ultrasonic processing by a loop setup enables the perfect sonication to be found for every pigment and every ink formulation. Such treated pigment particles result in better ink quality and show higher stability, an increased sonochemistry equipment life (also at elevated temperatures), freeze-thaw stability, reduced flocculation stable rheology and lower viscosity at higher particle loading.

High-power equipment uses more electricity.Considering rising energy prices, this affects the costs of processing. For this reason, it is important, that the equipment does not lose much energy in the conversion of electricity into mechanical output. Regarding energy consumption, ultrasound is to name as very energy efficient.

RPS-SONIC ultrasonic processors are claimed to have efficiency of >85 per cent. This helps to reduce electricity costs and gives you more processing performance. The break up of the agglomerate structures in aqueous and non-aqueous suspensions allows utilising the full potential of nanosize materials.

Investigations at various dispersions of nanoparticulate agglomerates with a variable solid content have demonstrated the considerable advantage of ultrasound when compared with other technologies, such as rotor stator mixers, piston homogenizes or wet milling methods, such as bead mills or colloid mills.

Parameter:

Application:

Typical applications of ultrasonic sonochemistry include ultrasonic homogenization, phacoemulsification, ultrasonic dispersion, depolymerization and wet grinding (particle size reduction), cell disruption and disintegration, extraction, degassing, and sonochemical processes;

Ultrasonic dispersion does not require the use of emulsifiers. In many cases, the diameter of the dispersed particles can reach 1μm or less. It can be carried out between solid, liquid, and gas phases of the same substance, or between different solids, liquids and gases. It has been widely used in food sample detection and analysis, preparation of nanomaterials, etc.

Such like :

● Paint, titanium oxide, iron oxide, carbon, etc. are dispersed in water or solvent.

● Graphene micronization

● Dispersion of fluorescent materials

● Dispersion of photosensitive materials

● Dispersion of dyes in molten paraffin

We advocate the core values of innovation, performance, harmony, and responsibility, with the vision of becoming an excellent global supplier of High Degree Vacuum De-Aeration High Speed Dispersion Mixer for Low Viscosity Paint, Coating, Chemcial. We have carried out in-depth environmental treatment and transformation of the whole process of production, and achieved ultra-low emission. We understand that culture and brand are symbiotic and that a world-renowned brand must be supported by culture.

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