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Preparation method of high-porosity aluminosilicate polymer material

A polymer material, aluminosilicate technology, applied in the direction of silicate, aluminum silicate, ceramic products, etc., can solve the limitation of opening and closing pore regulation, and the limitation and limitation of increasing the porosity of aluminosilicate polymer Field and scope and other issues, to achieve the effect of high porosity, overcoming the difficulty of increasing porosity, and low cost

Inactive Publication Date: 2018-09-18
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pore-forming agent method can also be used to directly form pores, there are limitations to the further improvement of the porosity of aluminosilicate polymers, and there are also limitations to the regulation of opening and closing pores. These factors limit the field and scope of its engineering applications.

Method used

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  • Preparation method of high-porosity aluminosilicate polymer material
  • Preparation method of high-porosity aluminosilicate polymer material
  • Preparation method of high-porosity aluminosilicate polymer material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A high porosity aluminosilicate polymer material was prepared according to the following steps:

[0024] (1) Preparation of alkaline excitation solution A: Potassium hydroxide is poured into silica sol with a mass fraction of 40%, and mixed with magnetic stirring. After stirring for 3 days, potassium hydroxide and silicon dioxide molar ratio is 1:1. Alkaline excitation solution A;

[0025] (2) Add the metakaolin powder to the alkaline excitation solution A, ultrasonically and mechanically stir for 30 minutes to obtain the aluminosilicate polymer slurry B with a molar ratio of silicon to aluminum of 2:1;

[0026] (3) According to the mass ratio of hydrogen peroxide to metakaolin 0.03:1, add foaming agent hydrogen peroxide to aluminosilicate polymer slurry B, then add deionized water to adjust the viscosity of the slurry to 100mPa·s~500mPa·s, stir 5 minutes; add the foam stabilizer sodium lauryl sulfate powder according to the mass ratio of the foam stabilizer to metakao...

Embodiment 2

[0033] Change the mass ratio of hydrogen peroxide to metakaolin in step (3) of Example 1 to 0.01:1, and the remaining steps and parameters are the same as in Example 1, and the density of the prepared high-porosity foamed aluminosilicate polymer material is 0.63g / cm 3 , the porosity is 71.9%, the open porosity is 67.7%, and the compressive strength is 1.56MPa;

[0034] Figure 4 It is the SEM figure of the high-porosity foamed aluminosilicate polymer material obtained through the above-mentioned preparation method, from Figure 4 It can be seen that the material has more closed-cell structure.

Embodiment 3

[0036] Change the mass ratio of hydrogen peroxide to metakaolin in step (4) of Example 1 to 0.02:1, and the remaining steps and parameters are the same as in Example 1, and the density of the prepared high-porosity foamed aluminosilicate polymer material is 0.43g / cm 3 , the porosity is 81.2%, the open porosity is 74.7%, and the compressive strength is 0.72MPa.

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Abstract

The invention discloses a preparation method of a high-porosity aluminosilicate polymer material, and belongs to the technical field of preparation of foam materials. The preparation method comprisesthe steps that a silica solution and strong base are mixed to form an alkaline exciting solution, the alkaline exciting solution and metakaolin serve as raw materials, hydrogen peroxide serves as a foaming agent, and the aluminosilicate polymer material with the porosity being 86% is prepared through direct foaming. The prepared aluminosilicate polymer material is high in porosity, low in weight and high in strength, and adjustable in pore opening and closing structures, and can be applied to the field of environment-friendly filtration materials. The preparation method is green and environmentally friendly, free of toxicity and harmless, low in cost, and easy to put into industrialized promotion.

Description

technical field [0001] The invention belongs to the technical field of foam material preparation, in particular to a method for preparing a high-porosity aluminosilicate polymer material. Background technique [0002] Aluminosilicate polymer is a kind of AlO 4 and SiO 4 A three-dimensional network structure material formed by cross-linking tetrahedral units through shared oxygen, which has a low density (2.2-2.7g / cm 3 ), acid and alkali corrosion resistance, high temperature resistance (1000 ~ 1600 ° C) and flame retardant properties, it has been used in the fire insulation of spacecraft, ships, automobiles and building materials. Foamed aluminosilicate polymer is a new type of porous material derived from foaming, which is synthesized into a porous structure by adopting some methods of porous foam ceramics on the basis of preparing aluminosilicate polymer. The foamed aluminosilicate polymer is prepared into a closed-cell structure, which has application value in the fiel...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/00C01B33/26C04B111/40
CPCC01B33/26C01P2002/72C01P2004/03C04B28/00C04B38/02C04B2111/40C04B22/062C04B22/06
Inventor 杨金龙闫姝张在娟刘静静任博干科鲁毓钜
Owner TSINGHUA UNIV