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Method for preparing boehmite micropowder having three-dimensional flaky aggregate morphology

A technology of ultra-fine powder and aggregate, applied in the direction of alumina/aluminum hydroxide, etc., to achieve the effect of easy availability of raw materials, uniform dispersion and clear process flow

Inactive Publication Date: 2014-12-24
TAISHAN MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the method of using aluminum nitrate and urea to prepare boehmite ultrafine powder through hydrothermal reaction can only obtain two-dimensional flake shape boehmite powder

Method used

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  • Method for preparing boehmite micropowder having three-dimensional flaky aggregate morphology
  • Method for preparing boehmite micropowder having three-dimensional flaky aggregate morphology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] Embodiment 1: The method for preparing the boehmite ultrafine powder I with three-dimensional plate-like aggregate morphology includes the following steps,

[0018] 1) A certain amount of analytically pure Al(NO 3 ) 3 9H 2 O was added to deionized water and stirred on a magnetic stirrer until dissolved to obtain Al 3+ Solution A with the concentration of the substance being 0.1mol / L;

[0019] 2) Add precipitation Al in the solution A that step 1) makes 3+ 125% analytically pure urea of ​​the required theoretical demand, and stirred for 0.5h to prepare solution B;

[0020] 3) A certain amount of amphiphilic block copolymer polystyrene-block-polyhydroxyethyl acrylate is dissolved in tetrahydrofuran to obtain amphiphilic block copolymer polystyrene-block-polyhydroxyethyl acrylate The amount concentration of the substance is 1.25×10 -3 mol / L solution C;

[0021] 4) Add 1 mL of solution C prepared in step 3) to solution B prepared in step 2) to obtain suspension D;

...

Embodiment approach 2

[0025] Embodiment 2: The method for preparing boehmite ultrafine powder II with three-dimensional plate-like aggregate morphology includes the following steps,

[0026] 1) A certain amount of analytically pure Al(NO 3 ) 3 9H 2 O was added to deionized water and stirred on a magnetic stirrer until dissolved to obtain Al 3+ The concentration of the substance is 0.2mol / L solution A;

[0027] 2) Add precipitation Al in the solution A that step 1) makes 3+ 150% analytically pure urea of ​​the required theoretical demand, and stirred for 0.5h to prepare solution B;

[0028] 3) A certain amount of amphiphilic block copolymer polystyrene-block-polyhydroxyethyl acrylate is dissolved in tetrahydrofuran to obtain the amphiphilic block copolymer polystyrene-block-polyhydroxyethyl acrylate The amount concentration of the substance is 1.25×10 -3 mol / L solution B;

[0029] 4) Add 2 mL of solution C prepared in step 3) to solution B prepared in step 2) to obtain suspension D;

[0030]...

Embodiment approach 3

[0032] Embodiment 3: The method for preparing boehmite ultrafine powder III with three-dimensional sheet-like aggregate morphology includes the following steps,

[0033] 1) A certain amount of analytically pure Al(NO 3 ) 3 9H 2 O was added to deionized water and stirred on a magnetic stirrer until dissolved to obtain Al 3+Solution A with the concentration of the substance being 0.3mol / L;

[0034] 2) Add precipitation Al in the solution A that step 1) makes 3+ 125% analytically pure urea of ​​the required theoretical demand, and stirred for 0.5h to prepare solution B;

[0035] 3) A certain amount of amphiphilic block copolymer polystyrene-block-polyhydroxyethyl acrylate is dissolved in tetrahydrofuran to obtain amphiphilic block copolymer polystyrene-block-polyhydroxyethyl acrylate The amount concentration of the substance is 1.25×10 -3 mol / L solution C;

[0036] 4) Add 2 mL of solution C prepared in step 3) to solution B prepared in step 2) to obtain suspension D;

[0...

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Abstract

The invention relates to a method for preparing boehmite micropowder having three-dimensional flaky aggregate morphology. The prior art comprises that aluminum nitrate and urea undergo a hydrothermal reaction to produce boehmite micropowder so that only boehmite powder having two-dimensional flaky morphology is obtained. The method for preparing boehmite micropowder having three-dimensional flaky aggregate morphology comprises that the boehmite micropowder having three-dimensional flaky aggregate morphology is prepared from aluminum nitrate and urea as raw materials and an amphiphilic block copolymer polystyrene-block-polyhydroxyethyl acrylate as a structural guider. The method for preparing the boehmite micropowder having three-dimensional flaky aggregate morphology realizes one-step reaction in a liquid phase, has a clear process, utilizes cheap and easily available raw materials and has a simple after-treatment process. The boehmite micropowder has regular three-dimensional flaky aggregate morphology, has good dispersion uniformity, and solves the problem that the traditional aluminum nitrate-urea hydro-thermal reaction only produces the boehmite powder having two-dimensional flaky morphology.

Description

technical field [0001] The invention relates to a method for preparing boehmite superfine powder with three-dimensional sheet aggregate shape. Background technique [0002] Aggregates of different shapes and microstructures composed of nano-basic units (such as nanoparticles, nanorods, and nanosheets), as well as the nano-functional materials and nano-devices constructed from them, because of their unique properties and potential in many fields applications have attracted much attention. Among them, the controllable preparation and growth mechanism of inorganic powder materials with highly regular sizes, shapes or patterns represented by three-dimensional structures have always been a research hotspot in the material science community. Boehmite (boehmite), also known as boehmite, appears as a white powder with a molecular formula of γ-AlOOH. The most important use of boehmite is to prepare alumina powder after calcination. This is firstly because the structure of boehmite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
Inventor 吴秀勇
Owner TAISHAN MEDICAL UNIV
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