Method of producing radioactive seed source core by electrohydrodynamic micro-droplet ejection

A technology of droplet spraying and production method, which is applied in radioactive sources, X-ray/γ-ray/particle irradiation therapy, nuclear engineering, etc., can solve the problems that will affect the accuracy of radioactive measurement, waste radioactive liquid, pollute the surrounding environment, etc. Achieve the effect of reducing radioactive pollution, reducing waste and improving accuracy

Active Publication Date: 2019-05-14
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not only waste precious radioactive liquid, but also affect the accur

Method used

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  • Method of producing radioactive seed source core by electrohydrodynamic micro-droplet ejection
  • Method of producing radioactive seed source core by electrohydrodynamic micro-droplet ejection
  • Method of producing radioactive seed source core by electrohydrodynamic micro-droplet ejection

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Embodiment Construction

[0031] Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail

[0032] Such as figure 1 As shown, use a syringe pump to control the supply of radioactive solution under the control of a computer or other controllers. The positive pole of the power supply 1 is applied to the conductive nozzle 4, and the negative pole is applied to the conductive filament 5. By applying a voltage, an electrostatic potential difference is introduced. As the voltage increases, the solution on the conductive nozzle 4 will become a hemispherical or ellipsoidal meniscus droplet; as the voltage of the power supply 1 increases gradually, the surface charge density of the solution on the conductive nozzle 4 increases, and the electric field force increases. big. When the power supply 1 continues to increase and the electrostatic force and gravity exceed the surface tension, the droplet will leave the conductive nozzle 4. Since the conductiv...

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Abstract

The invention discloses a method of producing a radioactive seed source core by electrohydrodynamic micro-droplet ejection. The method of producing the radioactive seed source core by the electrohydrodynamic micro-droplet ejection is characterized in that a metal filament is placed under a spout to maintain electrical grounding, and a certain voltage is applied between the spout and the metal filament; through the principle of electrohydrodynamics, tiny droplets with electric charges are created, and the droplets tend to be collected by the grounded metal filament under the action of electrostatic force; the metal filament can rotate axially and translate axially during ejection so as to ensure the microdroplets to be evenly sprayed on the surface of the metal filament; combining electrohydrodynamic micro-droplet generation technology with short-range radiotherapy device manufacturing technology, the method can be used in the field of radiotherapy. The method of producing the radioactive seed source core by the electrohydrodynamic micro-droplet ejection has the advantages of effectively increasing the rate of the adsorption reaction between radioactive material and surface, and preventing adverse consequences caused by the splash of solutions due to the fact that the generated microdroplets with electrical charges tend to deposit on the metal filament under the force of electric field force.

Description

technical field [0001] The invention relates to a micro-droplet generating device using the principle of electrohydrodynamics to generate micron-diameter droplets, which are accurately applied to conductive filaments. The invention belongs to the technical field of micro-liquid application. Background technique [0002] In general, electrohydrodynamic micro-droplet generating devices are aimed at liquids with electrical conductivity. It consists of a liquid supply module, a conductive nozzle, and a conductive substrate. The electric field is generated by the voltage applied between the conductive nozzle and the conductive substrate. Under the traction of electrostatic force, the liquid at the conductive nozzle will deform and break to form droplets. Under a certain liquid supply flow rate, by adjusting the applied voltage, the ejection state with consistent micro-droplet size and stable micro-droplet generation frequency can be achieved. The diameter of the ejected micro-d...

Claims

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Application Information

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IPC IPC(8): G21G4/06G21G4/08A61N5/10
Inventor 王志海王璨张海义贾瑞雯
Owner BEIJING UNIV OF TECH
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