Hollow metal particle with microbe cell template and its preparation process

A technology of microbial cells and metal particles, which is applied in the field of hollow metal particles and its preparation, can solve the problems of complex preparation process of lipid microtubules, single material, lack of change, etc., achieve reduction of processing steps, simple preparation method, and lower specific gravity Effect

Inactive Publication Date: 2006-01-25
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two preparation methods of microparticles all have the disadvantages of single material and lack of change, and the preparation process of lipid microtubules is relatively complicated.

Method used

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  • Hollow metal particle with microbe cell template and its preparation process
  • Hollow metal particle with microbe cell template and its preparation process
  • Hollow metal particle with microbe cell template and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: Preparation of hollow nickel metal particles using spherical microbial cells as templates.

[0046] (1) Screen out microorganisms of desired shape as required.

[0047] The present invention adopts Citeromyces matritensis preserved by the Institute of Microbiology, Chinese Academy of Sciences. The cell shape of Citeromyces matritensis is ellipsoid, with a long axis of 1.5 microns and a short axis of about 1 micron, and may have one or two buds. All cultures were carried out by conventional methods, and the cells were collected by centrifugation after the logarithmic phase.

[0048] (2) Fixation and strengthening treatment:

[0049] The collected microbial cells were first fixed in a glutaraldehyde solution with a temperature of 4°C and a concentration of 2.5% for 6 hours, washed with phosphate buffer, and then fixed in an osmic acid solution with a temperature of 4°C and a concentration of 1%. 3 hours, and then washed with deionized water.

[0050] (3) Ele...

Embodiment 2

[0075] Example 2: Preparation of hollow metal microparticles as templates of needle-shaped microbial cells.

[0076] (1) Screen out the microorganisms with the desired shape according to the needs and cultivate them: In order to observe the behavior of the magnetic particles obtained after metallization in the magnetic field, this study adopts the Microbiology Research Institute of the Chinese Academy of Sciences

[0077] Bacillus cereus was deposited as a template for magnetic metallization. The cell shape of Bacillus cereus is rod-shaped, about 3.0-5.0 microns in length and about 0.5 microns in diameter, and is a Gram-positive bacterium. It was cultured by conventional methods, and the bacteria were collected by centrifugation after the logarithmic phase.

[0078] (2), (3) preparation process is identical with embodiment 1.

[0079] main salt

reducing agent

complexing agent

stabilizer

Nickel sulfate 0.04

Cobalt sulfate 0.06

...

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Abstract

The present invention discloses one kind of hollow metal particle with microbe cell template and its preparation process. Hollow metal particle is prepared by using microbe cell with different geometric appearance as template and through chemical plating process to deposit metal layer or alloy layer on the surface. The conducting or magnetic particle thus prepared has small size, varying shape, electromagnetic performance similar to metal and low specific weight. The particle may be used as functional material or in constructing micro device, miniature part, shielding material in micro processing, aviation, aerospace, electronics and other fields.

Description

technical field [0001] The invention relates to a functional material, more particularly to a hollow metal microparticle using microbial cells as a template and a preparation method thereof. Background technique [0002] Metal powder materials have good electromagnetic and mechanical properties and are widely used. However, due to the large specific gravity of metal powder, its application is subject to many restrictions. Therefore, the preparation of new lightweight metal composite materials has always been a research hotspot at home and abroad. [0003] Electroless plating (also known as auto-catalytic chemicalplating) refers to the use of a suitable reducing agent to reduce the metal ions in the solution to metal elements and deposit them on the surface of catalytically active objects to form a metal layer without the passage of external current. The process is simple, the coating is uniform, dense, wear-resistant, the substrate does not need to be con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24C23C18/20C23C18/31
Inventor 张德远李雅芹蔡军黎向锋
Owner BEIHANG UNIV
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