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Method for separating micro Nano material

A separation material, micro-nano technology, applied in the field of micro-nano materials, to achieve the effect of simple and easy reagents, less process and simple operation

Inactive Publication Date: 2008-11-26
XIAMEN 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 solve the problems that the existing separation and purification of nanomaterials still need to select different separation methods for different situations, and to provide a method that can realize different substances, different shapes and different sizes of various micro-nano materials. separation method

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  • Method for separating micro Nano material

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Example 1: Separation of micro-nano materials with the same shape and different sizes of the same material.

[0017] Get through XRD (see figure 1 ) and scanning electron microscopy (see figure 2 a) The characterized cuprous oxide sample is used as the sample to be separated, and 1 ml of n-amyl alcohol is added to 5 mg of the material to be separated, and ultrasonically dispersed to form a suspension.

[0018] Add 2.5ml of deionized water to the centrifuge tube, pipette 300μl of the above suspension and carefully add it to the centrifuge tube, so that the n-amyl alcohol suspension of the upper sample and the water in the lower layer form a liquid-liquid interface. Pipette 100 μl of ethanol into the centrifuge tube; put the centrifuge tube into the centrifuge and centrifuge at 2000rpm, the sample to be separated is divided into two parts: at the interface and at the bottom of the centrifuge tube; collect the interface (upper layer) and centrifuge tube For the sample a...

Embodiment 2

[0020] Example 2: Separation of micro-nano materials of the same material with different shapes.

[0021] Take 4mg of cuprous oxide sample prepared in the laboratory as the material to be separated, add 1ml of n-amyl alcohol to the material to be separated, and disperse it ultrasonically to form a suspension; add 2ml of deionized water to the centrifuge tube, and pipette 300μl Carefully add the above suspension into the heart tube, so that the n-pentanol suspension of the upper sample and the water in the lower layer form a liquid-liquid interface, pipette 50 μl of ethanol into the centrifuge tube; put the centrifuge tube into the centrifuge Centrifuged at 4000rpm, the sample to be separated was divided into two parts: at the interface and at the bottom of the centrifuge tube; samples at the interface (upper layer) and at the bottom of the centrifuge tube (lower layer) were collected.

[0022] The separated product was characterized by a scanning electron microscope to obtain ...

Embodiment 3

[0023] Example 3: Separation of nanowires with the same shape and different densities.

[0024] 1) Take 3 mg of silver nanowires prepared in the laboratory as the sample to be separated (see Figure 4 a, b, c), add 1ml of n-amyl alcohol to the sample to be separated, and ultrasonically disperse to form a suspension;

[0025] 2) Add 2.5ml of deionized water to the centrifuge tube, pipette 300μl of the above suspension and carefully add it to the heart tube, so that the n-amyl alcohol suspension of the upper sample and the water in the lower layer form a liquid-liquid interface. Pipette 75 μl of ethanol into the centrifuge tube;

[0026] 3) Put the centrifuge tube into the centrifuge and centrifuge at a speed of 4000rpm. The sample to be separated is divided into two parts: at the interface and at the bottom of the centrifuge tube;

[0027] 4) Collect the sample at the bottom (lower layer) of the centrifuge tube.

[0028] The collected samples were characterized by scanning e...

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Abstract

A process for separating the micron (or nano) material by interface tension includes such steps as adding a water-insoluble solvent to the material to be separated, ultrasonic dispersing to become suspension, adding water and surfactant, centrifugal separation, and further separating small particles from big particles.

Description

technical field [0001] The invention relates to a micro-nano material, in particular to a method for separating micro-nano materials with different physical properties such as density, size and shape by using interfacial tension. Background technique [0002] Compared with macro-scale bulk materials, nano-scale substances can exhibit different physical and chemical properties, and the utilization of nano-materials is often achieved by using a large number of nano-monomers (zero-dimensional nanoparticles or one-dimensional nanoparticles, rods, etc.). The overall properties shown will greatly reduce the utilization value for nanomaterials with disordered overall structure, size and composition. Therefore, it is essential to control the shape, size and composition of nanomaterials in a targeted manner to utilize the special properties of nanomaterials. [0003] At present, the control of the singleness of the morphology, size and composition of nanomaterials mainly includes tw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B5/32B03B13/00B03B1/04B03B1/00
Inventor 谢兆雄金明尚徐韬江智渊郑兰荪
Owner XIAMEN UNIV
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