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A kind of spherical nano iridium oxide dna extraction magnetic powder and its production method

A technology of iridium oxide powder and production method, which is applied in the fields of magnetism of inorganic materials, manufacturing of inductors/transformers/magnets, electrical components, etc., and can solve problems such as insufficient surface biological activity, low chemical stability, and poor biocompatibility , to achieve rapid and thorough solid-liquid separation, chemical stability, not easy to oxidize, and good surface biological activity

Active Publication Date: 2020-09-04
HUBEI UNIV OF EDUCATION
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Problems solved by technology

At present, most magnetic powders are made of nano-Fe 3 o 4 , but the nano-Fe 3 o 4 There are problems such as easy agglomeration, low chemical stability, easy oxidation, insufficient surface biological activity, and poor biocompatibility.

Method used

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  • A kind of spherical nano iridium oxide dna extraction magnetic powder and its production method
  • A kind of spherical nano iridium oxide dna extraction magnetic powder and its production method
  • A kind of spherical nano iridium oxide dna extraction magnetic powder and its production method

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preparation example Construction

[0026] 4) Preparation of iridium carbonate foam: After filtering and washing all the iridium ion precipitates in the previous step, add PEG (10-15g / L) and SDBS (100-120g / L) at a volume ratio of 1-3:5 into the filter cake of the iridium ion precipitate, and then vigorously stir it for 1 to 2 hours, and control the temperature between 45 and 55°C until the formation of iridium carbonate precipitate foam.

[0027] 5) Preparation of spherical nano-iridium oxide powder: place the prepared iridium carbonate precipitation foam in a muffle furnace and dry at 100-120°C for 20-24 hours, and then keep 1-3L / s air in the tube furnace Flow rate, and calcine at 800-850°C for 2-3 hours, and finally obtain spherical nano-iridium oxide powder.

[0028] 2. Ultrasonic-laser surface roughening of spherical nano-iridium oxide DNA extraction magnetic powder:

[0029] 1) Ultrasound for extracting magnetic powder with spherical nano-iridium oxide DNA: Dissolve the prepared spherical nano-iridium oxid...

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Abstract

Disclosed are spherical nanometer iridium oxide DNA extraction magnetic powder and a production method thereof; the spherical nanometer iridium oxide magnetic powder is prepared by an ammonium bicarbonate precipitation method, wherein the single particle size of the powder is 50-100 nm, the particle size distribution D50 of an agglomeration body is 150-200 nm, the specific surface area of the powder is 25-35 m2 / g, and the agglomeration constant (D50 / DBET) of the powder is 7-10; the saturated magnetization intensity of the prepared spherical nanometer iridium oxide magnetic powder is relativelyhigh which reaches 90-150 emu / g, the residual magnetism and the coercive force are almost zero, and a rapid and thorough solid-liquid separation effect can be achieved under the action of extremely small magnetic fields, and the magnetic powder can be rapidly dispersed into a solution after the external magnetic field is removed; in addition, after the surface of the prepared spherical nanometeriridium oxide magnetic powder is subjected to ultrasonic assistance-laser surface texturing, the particles have high biocompatibility and water solubility. In addition, the magnetic powder is not easyto oxidize, and the 24d oxidation amount does not exceed 0.1% in an acid solution at the normal temperature at the PH value of 3-4. The magnetic powder can generate extremely strong adsorption effectwith DNA and can be used for extracting and purifying various animal and plant DNA.

Description

technical field [0001] The invention relates to a spherical nano magnetic powder and a production method thereof, more specifically, to a spherical nano iridium oxide DNA extraction magnetic powder and a production method thereof. Background technique [0002] Magnetic powder for DNA extraction is a functionalized carrier with biologically active groups and has superparamagnetic properties. The powder can be dispersed in the base liquid to form a magnetic liquid material, and its biologically active groups can be coupled with various biologically active substances, so that the liquid has the dual characteristics of liquid fluidity and solid magnetic particle material. Due to the effect of superparamagnetism, the magnetic powder can move and concentrate under the action of an external magnetic field. After the external magnetic field is removed, it can return to its original structure and shape, thus making the original complex solid-liquid separation technology faster and ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/11
CPCH01F1/11H01F41/0253
Inventor 陶军晖陈欣琦李睿戴伟周雨娟张玲玲万哲言胡锋邱尚焜王昊汪翠柳
Owner HUBEI UNIV OF EDUCATION
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