A low-cost preparation method for composites with uniform core-shell structure

A technology of core-shell structure and composite materials, which is applied in the direction of airgel preparation, chemical instruments and methods, vanadium oxide, etc., can solve the problems of uneven composite materials, large changes in the thickness of the cladding layer, and difficult nano-skeleton structures. Achieve simple steps, reduce the difficulty and cost of reaction operation, and achieve the effect of simple operation

Inactive Publication Date: 2018-07-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation of nano-structured composite materials, it is difficult for liquid to enter the nano-skeleton structure of the base material, resulting in the prepared core-shell structure composite materials are often uneven, and the thickness of the cladding layer varies greatly.

Method used

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  • A low-cost preparation method for composites with uniform core-shell structure
  • A low-cost preparation method for composites with uniform core-shell structure
  • A low-cost preparation method for composites with uniform core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] With vanadium pentoxide airgel as the base material and polypyrrole as the coating material: the prepared vanadium pentoxide airgel is placed in the reaction chamber, and the vacuum pump is used to evacuate for 1 hour so that the vacuum degree in the reaction chamber is -0.1MPa. Inject 0.5ml of hydrochloric acid into the reaction cavity, and react at room temperature for 1 hour. Afterwards, the non-volatile hydrochloric acid was removed, and the vacuum pump was used to evacuate again for 1 hour so that the vacuum degree in the reaction chamber reached -0.1 MPa again. 0.5ml of pyrrole monomer was injected into the reaction cavity, and reacted at room temperature for 3 hours. Afterwards, the vanadium pentoxide airgel was taken out, and vacuum-dried at 80° C. for 24 hours to prepare a polypyrrole-coated vanadium pentoxide core-shell composite airgel.

[0032] The transmission electron microscope photo of the polypyrrole-coated vanadium pentoxide core-shell structure comp...

Embodiment 2

[0034] Vanadium pentoxide airgel is used as the base material, and poly-3,4-ethylenedioxythiophene is used as the coating material: the prepared vanadium pentoxide airgel is placed in the reaction chamber, and vacuumed by a vacuum pump for 1 Make the vacuum degree in the reaction chamber be -0.1MPa in one hour. Inject 0.5ml of hydrochloric acid into the reaction cavity, and react at room temperature for 1 hour. Afterwards, the non-volatile hydrochloric acid was removed, and the vacuum pump was used to evacuate again for 1 hour so that the vacuum degree in the reaction chamber reached -0.1 MPa again. Inject 0.5ml of 3,4-ethylenedioxythiophene monomer into the reaction cavity, and react at 30°C for 12 hours. Afterwards, the vanadium pentoxide airgel was taken out, and vacuum-dried at 80° C. for 24 hours to prepare poly-3,4-ethylenedioxythiophene-coated vanadium pentoxide core-shell composite airgel.

[0035] The transmission electron micrograph of the poly 3,4-ethylenedioxythi...

Embodiment 3

[0037] With vanadium pentoxide airgel as the base material and polyaniline as the coating material: the prepared vanadium pentoxide airgel is placed in the reaction chamber, and the vacuum pump is used to evacuate for 1 hour so that the vacuum degree in the reaction chamber is -0.1 MPa. Inject 0.5ml of hydrochloric acid into the reaction cavity, and react at room temperature for 1 hour. Afterwards, the non-volatile hydrochloric acid was removed, and the vacuum pump was used to evacuate again for 1 hour so that the vacuum degree in the reaction chamber reached -0.1 MPa again. Inject 0.5ml of aniline monomer into the reaction chamber and react at 50°C for 24 hours. Afterwards, the vanadium pentoxide airgel was taken out, and vacuum-dried at 80° C. for 24 hours to prepare a polyaniline-coated vanadium pentoxide core-shell composite airgel.

[0038] The transmission electron microscope photo of the polyaniline coated vanadium pentoxide core-shell structure composite airgel that ...

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Abstract

The invention relates to a low-cost preparation method of a composite material with a uniform core-shell structure. The method comprises the following steps: (1) placing a substrate material into a reaction cavity, and vacuumizing the reaction cavity; (2) injecting a catalyst into the reaction cavity, adjusting and controlling the temperature to gasify the catalyst, and depositing the catalyst on the surface of the substrate material; (3) removing the excessive catalyst from the reaction cavity, and vacuumizing the reaction cavity again; (4) injecting a covering material into the reaction cavity, and adjusting and controlling the temperature to gasify the covering material to make the covering material be reacted with the substrate material under the action of the catalyst and cover the surface of the substrate material with a chemical reaction product, thereby forming a core-shell structure blank; (5) taking out the blank, and performing vacuum drying under the temperature of 20 to 160 DEG C for 0.5 to 24 hours to remove the catalyst and the covering material which are left on the blank, thereby obtaining the composite material with the uniform core-shell structure. Compared with the prior art, the low-cost preparation method disclosed by the invention has the advantages of simple steps, easiness in implementation and the like.

Description

technical field [0001] The invention belongs to the field of material preparation and chemical synthesis, and in particular relates to a low-cost preparation method of a composite material with a uniform core-shell structure. Background technique [0002] The rapid development of science and technology, especially the continuous progress of manufacturing, chemical industry, and energy industry, has put forward higher requirements for the performance of materials. A single material often cannot meet the needs of industrialization, so composite materials have become an inevitable trend in the development of future materials. The core-shell composite material is a composite material with a special structure. Its main feature is that one material is coated on the surface of another material to form a cladding layer. The clad material is the "core", and the cladding layer material For the "shell". Common core-shell structure materials are spherical, tubular, and ribbon-shaped, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00C08G73/06C08G61/12C08G73/02C01G31/02
CPCB01J13/0091C01G31/02C01P2004/04C08G61/126C08G73/0266C08G73/0611
Inventor 高国华武英杰毕文超张月柔吴广明沈军周斌
Owner TONGJI UNIV
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