Sorting method of magnetic nano microspheres

A technology of magnetic nano and nano microspheres, applied in chemical instruments and methods, classification, solid separation, etc., can solve problems such as difficult magnetic nano microspheres to effectively sort, and achieve economical and convenient results

Active Publication Date: 2015-11-11
WENZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a particle size sorting method for magnetic nano-microspheres, to solve the problem in the prior art that it is difficult to effectively sort magnetic nano-microspheres of different particle sizes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 0.5 g of ferric oxide nanospheres with 200 mL of water into a beaker, and ultrasonicate for 15 min. At room temperature, a disc-shaped magnet (magnetic field strength 0.3T) was placed at the bottom of the beaker, and the supernatant and the microsphere-enriched solution were separated after 20 s. At 30° C., the supernatant and the microsphere-enriched liquid were vacuum-dried for 12 hours, and two batches of ferroferric oxide nano-microspheres with different particle sizes were obtained through one-time sorting. Measured by a laser particle size analyzer (repeated three times), the average particle diameters of the sorted iron ferric oxide nanospheres were 116.0 and 122.5 nm, respectively.

Embodiment 2

[0040] Mix 0.2 g of ferric oxide nanospheres-polymer composite nanospheres with 200 mL of water into a beaker, and ultrasonicate for 5 minutes. At room temperature, place a disc-shaped magnet (magnetic field strength about 0.3T) on the bottom of the beaker, and separate the first supernatant and the first microsphere enrichment solution after 10 seconds; Above the magnet, separate the second supernatant and the second microsphere enrichment solution after 10s; at room temperature, vacuum the first microsphere enrichment solution, the second microsphere enrichment solution and the second supernatant respectively After drying for 24 hours, three batches of ferric oxide nanospheres-polymer composite nanospheres with different particle sizes were obtained. Measured by a laser particle size analyzer (repeated three times), the average particle sizes of the sorted Fe3O4 / polymer composite nanospheres were 514.5, 430.6 and 234.8 nm, respectively.

Embodiment 3

[0042] Ferric oxide nanometer-silicon dioxide core-shell type nano microsphere 0.3g is mixed with 200mL water and ethanol mixed solvent water and packed into a beaker, ultrasonic 5min, wherein the weight ratio of water and ethanol in the above mixed solvent is 1: 3. At room temperature, place a disc-shaped magnet (magnetic field strength about 0.3T) on the bottom of the beaker, and separate the supernatant and microsphere enrichment solution after 15 seconds; at room temperature, vacuum the supernatant and microsphere enrichment solution separately. After drying for 24 hours, two batches of iron ferric oxide nano-silicon dioxide core-shell nanospheres with different particle sizes are obtained through one-time sorting. Measured by a laser particle size analyzer (repeated three times), the average particle diameters of the sorted ferric oxide / silicon dioxide core-shell nanospheres are 255.7 and 286.5 nm, respectively.

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Abstract

The invention provides a sorting method of magnetic nano microspheres. The sorting method comprises the following steps: S1, scattering magnetic nano microspheres in a solvent so as to form a suspension; and S2, placing the suspension in a magnetic field, and sorting the magnetic nano microspheres through the effect of the magnetic field so as to obtain magnetic nano microspheres with different particle diameters. The magnetic nano microspheres can move under the effect of the magnetic field, and the magnetic nano microspheres with different particle diameters move at different moving speeds in the magnetic field, so that the purpose for sorting the magnetic nano microspheres with different particle diameters is realized. Through the adoption of the sorting method, the magnetic nano microspheres with different particle diameters can be effectively separated; the method has the advantages of being high-efficient, economic, convenient, rapid and the like, and suitable for industrialized large-scale application.

Description

technical field [0001] The invention relates to the field of material sorting, in particular to a sorting method of magnetic nano-microspheres. Background technique [0002] Nanospheres refer to small particles of metal or semiconductor materials with a size of nanometers. They are the state of matter between bulk materials and molecules, and exhibit many special optical, electrical, magnetic and catalytic properties. Nanomagnetic material is a new type of material that appeared in the 1980s. The size of magnetic nanospheres is usually between 1 and 100nm. In addition to the mesoscopic properties of nanomaterials in terms of physics and chemistry, they also have special magnetic properties - mesoscopic magnetism. At present, nano-magnetic microspheres are research hotspots in the fields of information, biology, chemistry, and materials. Nano-magnetic microspheres have a wide range of practical applications, such as magnetic fluids, nano-magnetic recording materials, microw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B13/00
Inventor 林振坤张雪梅周青青张艳芳贾银行
Owner WENZHOU MEDICAL UNIV
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