Preparation method of spherical geopolymer with high aperture ratio and hierarchical pore structure

A geopolymer, multi-level pore technology, applied in ceramic products, other household appliances, cement production, etc., can solve the problem of small average particle size of microspheres, difficult to prepare geopolymers with high open porosity, low porosity and other problems, to achieve the effect of simple implementation, wide application prospects, and high porosity

Active Publication Date: 2021-08-06
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of the low porosity of existing spherical geopolymers, the small average particle size of microsp

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  • Preparation method of spherical geopolymer with high aperture ratio and hierarchical pore structure
  • Preparation method of spherical geopolymer with high aperture ratio and hierarchical pore structure
  • Preparation method of spherical geopolymer with high aperture ratio and hierarchical pore structure

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Example Embodiment

[0039] DETAILED DESCRIPTION OF THE INVENTION A preparation method of spherical geological polymers of a high open-cell multi-stage aperture structure according to the present embodiment performs according to the following procedure:

[0040] Step 1: Slurry Preparation: Add a silicate mineral powder to the alkali excitation solution, stir mixed to form a uniform slurry, then add a surfactant, stirred to mix uniform, then add a blowing agent to continue to stir well, obtained Grounder slurry; the alkali excitation solution is mixed by a base solution and a silicate solution; wherein the alkali solution is a potassium hydroxide solution or a sodium hydroxide solution, the silicate solution as a potassium silicate solution. , Sodium hydroxide solution or lithium hydroxide solution, the mass ratio of the alkali solution and the silicate solution in the alkali excitation solution is 1: (1 to 1.5), the concentration of the base solution is 8 mol / L ~ 15 mol / L The silicate solution has...

Example Embodiment

[0044] DETAILED DESCRIPTION OF THE INVENTION 2: A spherical geological polymer having a specific embodiment after adsorption dye is placed in a vacuum sintering furnace, heated under 400 to 500 ° C for 3 h to 4 h, and a spherical geological polymer according to a specific embodiment Recycle.

[0045] DETAILED DESCRIPTION OF THE INVENTION The number of spherical geological polymers can be recovered by greater than 10 times, and the removal efficiency of the dye can still be greater than 90% after recovery. At the same time, the process has improved the multi-stage pore structure with high opening rate, which has a more excellent adsorption performance.

Example Embodiment

[0046] Example 1: A preparation method of a spherical geological polymer of a high open-cell multi-stage hole structure was carried out in the following steps:

[0047] Step 1: Slurry Preparation: Pre-base excitation solution is added to the alkali mineral powder, stirred at 600 rpm to mix 40 min, form a uniform slurry, then add sodium lauryl sulfate, stirred under 800 rpm to mix 2 min, then add The hydrogen peroxide solution having a mass fraction of 3% continues to be stirred at 800 rpm for 5 min to obtain a generic slurry; the alkaline excitation solution is a sodium hydroxide solution having a concentration of 13 mol / L and a mass concentration of 40% sodium silicate. The solution was mixed with a mass ratio of 1: 1.25 in 300 rpm, wherein the amount of the sodium silicate solution was 2.7, wherein the silicate mineral powder is a mixture of heights and slag according to mass ratio of 3: 7. The mass of the silicate mineral powder and the alkali excitation solution is compared ...

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Abstract

The invention relates to a preparation method of a spherical geopolymer with a high aperture ratio and a hierarchical pore structure. The invention belongs to the field of geopolymer preparation. The invention aims to solve the technical problems that an existing spherical geopolymer is low in porosity, the average particle size of microspheres is small, and the geopolymer with high aperture ratio is difficult to prepare. The method comprises the steps: step 1, preparing slurry; step 2, curing and balling; and step 3, post-processing. According to the novel method provided by the invention, the spherical geopolymer with the characteristic of a high-porosity communicated hierarchical pore structure can be prepared by designing a suspending agent and adjusting the foaming slurry, the diameter of the prepared spherical geopolymer is 2-3 mm, and the preparation efficiency is greatly improved; and technical support is provided for large-scale utilization of the porous spherical geopolymer, and in addition, the multi-layer suspending agent structure can effectively prevent the prepared spherical geopolymer from being bonded with the bottom of a beaker.

Description

technical field [0001] The invention belongs to the field of geopolymer preparation, and in particular relates to a preparation method of a spherical geopolymer with a high porosity and multi-stage pore structure. Background technique [0002] Geopolymer is a kind of aluminum oxide tetrahedral structural unit AlO 4 and silicon-oxygen tetrahedral unit SiO 4 An inorganic polymer that forms a three-dimensional network structure. Its raw materials have a wide range of sources, and substances rich in aluminosilicates can be used, such as fly ash, slag, coal gangue, metakaolin, etc., which can form a stable three-dimensional network gel structure under the action of an alkali activator. It can be cured in a low temperature environment (60-150°C), and has the characteristics of fast curing speed, high strength, high temperature resistance, acid and alkali resistance, and is also an environment-friendly product that is free from sintering, low energy consumption, and low discharge...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B38/02C04B40/00
CPCC04B28/006C04B40/0028C04B18/141C04B14/106C04B12/04C04B22/062C04B24/16C04B22/068C04B38/02C04B38/0058C04B38/0074C04B38/007Y02P40/10
Inventor 张欢白成英王冬妮管天庆洪洋周伯峻刘旺旺郑婷张晓红乔英杰
Owner HARBIN ENG UNIV
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