Two-way valveless microflow pump based on PVDF piezoelectric film and preparation method thereof

Abstract

The invention discloses a two-way valveless microflow pump based on a PVDF piezoelectric film and a preparation method thereof. The two-way valveless microflow pump based on the PVDF piezoelectric film comprises a cover plate, the PVDF piezoelectric film, a channel layer and a base plate, wherein the cover plate, the PVDF piezoelectric film, the channel layer and the base plate are sequentially and fixedly connected from top to bottom; the upper surface and the lower surface of the PVDF piezoelectric film are each provided with a plurality of conductive film areas, each conductive film area comprises a working area electrode and a conducting area electrode used for making the working area electrode be connected with an external voltage source, and one working area electrode on the upper surface of the PVDF piezoelectric film right faces one working area electrode on the lower surface of the PVDF piezoelectric film; a through hole is formed in the cover plate; and a fluid channel and two liquid storage pools are formed in the channel layer, the two ends of the fluid channel communicate with the liquid storage pools correspondingly, the working area electrodes on the upper surface of the PVDF piezoelectric film right face the through hole and the liquid channel, and the liquid storage pools communicate with an external liquid source. According to the two-way valveless microflow pump based on the PVDF piezoelectric film, valveless two-way driving can be achieved, switching is easy, and the preparation method is easy to realize.

Description

technical field [0001] The invention relates to a bidirectional valveless microflow pump and a preparation method thereof, in particular to a bidirectional valveless microflow pump based on a PVDF piezoelectric film and a preparation method thereof. Background technique [0002] The microfluidic pump is the core component of the microfluidic chip system. It is responsible for providing fluid driving force for the work of the entire system. It is mainly used to control the pumping of samples and reagents and the discharge of waste materials, while controlling the flow and velocity of samples and reagents. Traditional mechanical valved micro-flow pumps are relatively mature in manufacturing technology, but due to the presence of mechanical movable parts such as micro-valves inside, they are bound to be limited by processing technology and processing accuracy, which does not conform to the trend of miniaturization of micro-fluidic systems. At the same time, the valve is frequen...

AI Technical Summary

Problems solved by technology

Traditional mechanical valved micro-flow pumps are relatively mature in manufacturing technology, but due to the presence of mechanical movable parts such as micro-valves inside, they are bound to be limited by processing technology and processing accuracy, which does not conform to the trend of miniaturization of micro-fluidic systems.

At the same time, the valve is frequently switched on and off, and the stability and service life are affected to a certain extent.

Most of the micro-flow pumps that have been reported so far are one-way drive, which cannot be easily switched to two-way drive, which has great limitations in application scenarios.

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