Composite multilayer core-shell structure ultrafine powder, production method and application thereof
A multi-layer core-shell structure and ultra-fine powder technology, which is applied in the treatment of dyed organic silicon compounds, dyed low-molecular organic compounds, dyed high-molecular organic compounds, etc., can solve the problems of magnetic powder use and storage. Consideration, reduction of separation efficiency, reduction of surface activity and other issues
Active Publication Date: 2017-01-11
张孝根
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Problems solved by technology
However, the chemical stability of the magnetic particles cannot meet the requirements of use in high temperature or corrosive environments, and the use and storage of magnetic powders have not been fully considered.
At the same time, increasing the particle size will cause a decrease in the specific surface area, resulting in a decrease in surface activity, which will directly reduce the separation efficiency.
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[0415] as attached figure 1 As shown in the figure, a composite multi-layer core-shell structure ultrafine powder includes a four-layer structure consisting of a core layer 1, a modified layer 2, an intermediate layer 3 and a peripheral layer 4 from the inside to the outside, or from the inside to the outside. A four-layer structure consisting of core layer 1, intermediate layer 3, modified layer 2 and peripheral layer 4, the core layer is 0.025-25 μm; the thickness of the modified layer is not more than 10 μm; the thickness of the intermediate layer is not more than 10 μm; the thickness of the peripheral layer is not more than 10 μm. more than 10μm.
[0416] A method for producing ultrafine powder with a multi-layer core-shell structure can be further subdivided according to the difference of the four-layer structure as follows:
[0417]1. Modified layer process
[0418] Add 810g FeCl3, 447g FeCl2, 10L deionized water, stir and dissolve at a high speed of 2400rpm under nitr...
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Abstract
The invention discloses ultrafine powder with a compound multi-layer core-shell structure. The ultrafine powder comprises a four-layer structure consisting of a core layer, a modified layer, an intermediate layer and a peripheral layer or the core layer, the intermediate layer, the modified layer and the peripheral layer from the inside to the outside, wherein the core layer is 0.025 mu m-25 mu m; thickness of the modified layer does not exceed 10 mu m; the thickness of the intermediate layer does not exceed 10 mu m; and the thickness of the peripheral layer does not exceed 10 mu m. The invention further discloses a preparation method and an application of the ultrafine powder with the compound multi-layer core-shell structure. The process disclosed by the invention is environment-friendly, suitable for industrial production, does not need to use materials containing halogen, sulfur and heavy metal elements in the production process, and can effectively control harmful substances. And moreover, development of the process which is better in production performance, lower in cost and suitable for industrial production becomes the key point of a novel process technology.
Description
technical field [0001] The invention relates to a method for producing a composite multi-layer core-shell structure ultrafine powder, which belongs to the technical field of production and preparation of composite polymer functional materials. The invention also relates to the application of the composite multilayer core-shell structure ultrafine powder. Background technique [0002] Ultrafine powder has the advantages of uniform and controllable particle size, large specific surface area, and the surface can carry functional groups. At the same time, it also has the advantages of large surface energy, easy to agglomerate, strong surface polarity, hydrophilic and oleophobic, and difficult in organic media. It is uniformly dispersed, and the weak bonding force with the matrix causes the disadvantage of interface defects. Combining ultrafine powder with organic materials reduces the occurrence of defects and improves material properties. [0003] The advantages of inorganic ...
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IPC IPC(8): C09C1/28C09C1/36C09C1/02C09C3/12C09C3/10C09C3/08
Inventor 张孝根
Owner 张孝根