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A method of removing the external magnetic field to control the magnetic fluid in the three-dimensional periodic structure of non-magnetic ellipsoidal colloidal particles

A three-dimensional periodic, colloidal particle technology used in the field of magnetic fluid removal

Inactive Publication Date: 2017-03-08
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for removing the external magnetic field to regulate the ferrofluid in the three-dimensional periodic structure of non-magnetic ellipsoidal colloidal particles, which solves the problem of using hydrofluoric acid to remove the magnetic fluid in the three-dimensional periodic structure of non-magnetic ellipsoidal colloidal particles. problems arising

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The non-magnetic ellipsoidal colloidal particles in this embodiment are mainly prepared by stretching polystyrene spherical particles, and the particle size distribution of the non-magnetic polystyrene ellipsoidal colloidal particles is relatively uniform and the shape is basically the same.

Embodiment 2

[0019] Example 2: In this embodiment, a self-assembly method of a three-dimensional periodic structure of non-magnetic ellipsoidal colloidal particles regulated by an external magnetic field is mainly by uniformly dispersing non-magnetic ellipsoidal colloidal particles in a magnetic fluid, and under the control of an external magnetic field, by The vertical deposition self-assembly method yields highly ordered three-dimensional periodic structures.

Embodiment 3

[0021] This embodiment prepares the self-assembly method of a three-dimensional periodic structure of non-magnetic ellipsoidal colloidal particles regulated by an external magnetic field described in Example 2, which is realized by the following steps: 1) Place the ellipsoid prepared in Example 1 in In the small glass bottle A, use an ultrasonic cell to sonicate for 60 minutes, so that the ellipsoid is evenly dispersed in deionized water; 2) Take out 5ml of the solution with the ellipsoid from the small glass bottle A, and drop in 0.017ml of magnetic fluid with a concentration of 0.3%, And the ultrasonic is always evenly distributed, and then placed in the small glass bottle B; 3) Place the glass bottle B in a high-voltage box, and place a bar magnet on each of its upper and lower ends, so that it is in a uniform electric field , by adjusting the position of the magnet, the magnetic induction intensity at the liquid level of the small glass bottle B is controlled to be 210G; 4)...

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Abstract

A method for removing the magnetic fluid in the three-dimensional periodic structure of non-magnetic ellipsoid colloidal particles by removing an external magnetic field. There are energized coils respectively to control the magnetic field strength. Water vapor is introduced from one side of the three-dimensional periodic structure along the horizontal direction. The water vapor is slowly immersed into the magnetic fluid through high pressure. Under the action of the gradually increasing magnetic field force, the magnetic fluid flows out with the water. . The technical effect of the invention is that the magnetic fluid in the three-dimensional periodic structure of the prepared non-magnetic ellipsoid colloid particles is effectively removed, which not only removes cleanly, but also has no influence on the three-dimensional periodic structure.

Description

technical field [0001] The invention relates to a method for removing magnetic fluid, in particular to a method for removing the magnetic fluid in the three-dimensional periodic structure of non-magnetic ellipsoidal colloid particles controlled by an external magnetic field. Background technique [0002] The three-dimensional periodic structure is an artificial spatial periodic structure, because it can use its bandgap effect and defect effect to realize the free manipulation and control of photons, it has a wide range of applications in many fields such as quantum information processing, optical information processing, and biosensing. Prospect has been a research hotspot in recent years. There are many methods for preparing three-dimensional periodic structures, such as precision processing technology, semiconductor manufacturing technology, colloidal self-assembly method, template method, and laser manufacturing technology, etc. the most effective method. Self-assembly m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/28C08L25/06
Inventor 刘桂强刘正奇邵辉柏余美东黄珊潘平平刘晓山王燕顾刚
Owner JIANGXI NORMAL UNIV