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Method and device for plating cladding magnetic material on microorganism surface

A technology of microbial activity and microorganisms, applied in the field of preparing electromagnetic wave absorbing particles, can solve problems such as unsolved coating, and achieve the effects of reducing processing procedures, controllable electromagnetic properties, and uniform coating

Inactive Publication Date: 2011-04-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the coating of microbial cells by pure magnetic alloys (without non-metallic elements) with better electromagnetic properties has not been solved

Method used

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  • Method and device for plating cladding magnetic material on microorganism surface
  • Method and device for plating cladding magnetic material on microorganism surface
  • Method and device for plating cladding magnetic material on microorganism surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Example 1 : Electroplating-coated pure Ni bioparticles using spirulina as a template

[0094] This example adopts spirulina as the forming template. The microorganism is blue-green in color and has a regular helical structure. Generally, the helix width is 26 μm to 36 μm, the pitch is 43 μm to 57 μm, and the number of helices is 4 to 7, up to about 20.

[0095] Step 1: Template preprocessing

[0096] The spirulina was fully washed with phosphate buffer solution, and then fixed in a glutaraldehyde solution with a temperature of 4°C and a concentration of 2.5wt% for 4 hours to enhance its mechanical strength. After that, it was repeatedly washed and filtered with deionized water for 3 times, and then used for later use.

[0097] The dosage of spirulina and glutaraldehyde solution is: 1g spirulina needs 20mL glutaraldehyde solution.

[0098] Step 2: template conductive treatment

[0099] (A) Put the spirulina obtained in step 1 into the colloidal palladium activation ...

Embodiment 2

[0122] Example 2 : Electroplating-coated Ni-Fe bioparticles using diatomaceous earth as a template

[0123] In this example, diatomaceous earth is used as a forming template. The diatomite is off-white flaky powder with a particle diameter of 30-50 μm, a thickness of 2-5 μm and pores of 50-200 nm.

[0124] Step 1: Template preprocessing

[0125] The diatomite was coupled at a temperature of 30°C and a stirring speed of 220r / min for 4h, and then dried at a vacuum of -0.1MPa and a temperature of 120°C for 4h. The coupling solution used is 1.5 wt% APTES (γ-aminopropyltriethoxysilane) absolute ethanol solution.

[0126] The dosage of diatomite and coupling solution is: 1g diatomite needs 25mL coupling solution.

[0127] Step 2: template conductive treatment

[0128] (A) Put the diatomite obtained in step 1 into the colloidal palladium activation solution, activate it for 10 minutes at a temperature of 30°C and a stirring speed of 220r / min, then filter it with a 400-mesh silk...

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Abstract

The invention discloses a method and device for plating cladding magnetic material on a microorganism surface. The method comprises the following steps: (1) template pretreatment; (2) template conduction treatment; (3) cladding of magnetic material; (4) dehydration treatment; and (5) vacuum drying. The device comprises a plating tank, a diaphragm, a vibrator, a stirrer, an electrode, a circulation pump and the like. The plating tank is divided into a cathode tank and an anode tank by a round diaphragm; a multi-layer cylindrical copper grid electrode is arranged in the cathode tank, and the top of a fixture of the copper grid electrode is connected with the vibrator; a mechanical stirrer is arranged at the centre of the copper grid electrode; a bracket is arranged at the bottom of the anode tank, and a six-hole cylindrical graphite electrode is fixed on the bracket; and the circulation pump is connected with the two sides of the anode tank through two pipelines with valves. Through the invention, the materials are easily available, the process is stable, microorganism coalescence in the plating process can be effectively avoided, and the original body characteristics of the microorganism are maintained.

Description

technical field [0001] The invention relates to a method and device for electroplating and coating magnetic materials on the surface of microorganisms, and relates to a method for electroplating and coating magnetic materials. A method for preparing electromagnetic wave-absorbing particles using magnetic materials. Background technique [0002] With the development of wireless communication technology, electromagnetic waves are widely used in various fields. While bringing huge economic benefits to human beings, they also generate many problems such as electromagnetic radiation, electromagnetic interference, and electromagnetic leakage. It has been recognized as the fourth Big pollution. The use of electromagnetic absorbing materials is one of the most effective means to completely solve electromagnetic radiation pollution, and the key to high-performance electromagnetic absorbing materials is absorbing particles. [0003] The prominent problems existing in the existing el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/54C25D7/00
Inventor 张德远兰明明蔡军
Owner BEIHANG UNIV
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