High-conductivity electrolyte aqueous solution electroinjection system and method

Abstract

A high conductivity electrolyte aqueous solution electroinjection system and method, comprising: an inner capillary tube and an outer capillary tube arranged coaxially, the inner capillary tube extending a length from the outer capillary tube; the inner capillary tube injection pump is used for conveying an electrolyte aqueous solution to the inner capillary tube; the outer capillary tube injection pump is used for conveying ionic liquid to the outer capillary tube; the high-voltage power supply is used for loading high potential on the inner capillary tube and the outer capillary tube; the current collecting plate is spaced from the extending tail end of the inner capillary tube by a certain distance and is grounded, so that a strong electric field is formed between the current collecting plate and the inner capillary tube as well as the outer capillary tube; and the central control system is operably connected with the above parts and controls the parts.

Description

technical field [0001] The invention belongs to the technical field of electrospray ion sources, and in particular relates to an electrospray system and method using a coaxial capillary for a high-conductivity electrolyte aqueous solution. Background technique [0002] The application of electrospray phenomenon is very extensive, and can be used in mass spectrometry, electrospinning, electrostatic inkjet, the manufacture of microsphere particles and films with controllable nanostructures, and electrospray thrusters. When the electrospray phenomenon is applied, the fluid droplets form a cone shape under a strong electric field, that is, the Taylor cone. The Taylor cone will only form after the applied electric field exceeds a certain critical value, and its cone half angle is generally 49.3°. When the applied electric field is strong enough , a cone jet is emitted from the tip of the Taylor cone. [0003] Electrospray can be used as an ion source in mass spectrometry, and it...

AI Technical Summary

Problems solved by technology

Early electrospray thrusters used electrolyte solution as a working medium. The solvent of the electrolyte solution was an organic solvent, which could achieve high conductivity, but there were volatility problems in vacuum and solute precipitation problems that made the work effect not good. Therefore, this field Electrolyte solutions are generally considered unsuitable as working fluids for electrospray thrusters

In addition, ionic liquids are currently used as working fluids for electrospray thrusters. However, compared with aqueous electrolyte solutions, the use of ionic liquids will result in higher costs and it is difficult to adjust the conductivity.

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