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Mixer Reduced Environmental Pollution
Nov 02, 2017

In the field of analytical chemistry and life sciences, the miniaturization of the system is the trend. With the rapid development of microfabrication technology, micro-mixing in the chemical laboratory has an increasingly important role. When two or more fluids are chemically reacted, the effective mixing between them must be addressed, so that micro-mixing is an important component of micro-mixing. The main structural feature of the Mixer is that the effective structure of the fluid is at least one dimension at a hundred micron scale. Mixer basic features and the biggest advantage is a variety of unit technology in the overall control of the tiny platform on the flexible combination of scale integration. Mixer has the following characteristics:

(1) Mixers with high efficiency. The separation, measurement, or other more complex operation can be done in seconds to tens of seconds. The analysis speed is often higher than the corresponding macro operation by one to two orders of magnitude.

(2) Micro-mixing analysis of the sample and reagent consumption can be reduced to a slight increase in the level. This reduces both the cost of the analysis and the consumption of precious reagents and also reduces environmental pollution.

(3) Mixer micro-scale equipment to make the production of materials to reduce consumption, and when the realization of industrialization, the production cost is expected to further reduce, is conducive to the development of the mixer.

Depending on whether the mixing needs to be done with external sources, the Mixers are divided into active Mixers and passive Mixers. Active microcontrollers include mechanically driven, electrodynamic, ultrasonic, magnetically driven and piezo-driven mixers. The mixing of the sample in the passive Mixer does not require external force source. Compared with the active Mixer, the passive Mixer has the characteristics of simple structure, low energy consumption, convenient control, easy integration and so on. In microchannels, microfluidics often flow in a laminar flow state, so the fluid in the passive Mixer is mainly polymerized by molecular diffusion, however, it is not advisable to rely solely on molecular diffusion to achieve mixing in a microchannel environment. In order to enhance the mixing of the samples in the passive Mixers, the purpose of mixing is usually achieved by designing meandering microchannels or by providing obstacles in the microchannels to refine laminar flow or produce chaotic convection.