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Preparation method of stably dispersed nano 8YSZ aqueous phase suspension

A water-phase suspension and dispersion stabilization technology, applied in coatings and other directions, can solve problems such as unsustainable dispersion effect, reduced performance of nanomaterials, thermodynamic instability of two-phase dispersion system, etc.

Pending Publication Date: 2021-04-27
MINNAN INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical method refers to the use of ultrasonic oscillation or ball milling. The two-phase dispersion system obtained by this method is a thermodynamically unstable system. After a certain period of time, the particles will meet again and agglomerate, the dispersion effect will not last, and the excellent performance of nanomaterials will be reduced.

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  • Preparation method of stably dispersed nano 8YSZ aqueous phase suspension
  • Preparation method of stably dispersed nano 8YSZ aqueous phase suspension
  • Preparation method of stably dispersed nano 8YSZ aqueous phase suspension

Examples

Experimental program
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Effect test

Embodiment 1

[0042] refer to figure 1 , figure 1 It is the flow process of the preparation method of a kind of dispersion stable nanometer 8YSZ aqueous phase suspension of the present invention Figure 1 .

[0043] This implementation provides a kind of preparation method of dispersed stable nano 8YSZ aqueous phase suspension, comprising the following steps:

[0044] S1. Configuration of initial suspension liquid: Weigh nanometer 8YSZ powder, add deionized water, stir evenly, and obtain initial suspension liquid with a solid phase mass fraction of 20%;

[0045] S2. Dispersion of the suspension: adding a dispersant to the initial suspension liquid for dispersion treatment to obtain a suspension.

[0046] This dispersing agent is the polyethylene glycol reagent (being called for short PEG) that mass fraction is 0~4%, and this polyethylene glycol reagent is the polyethylene glycol reagent (being called for short PEG600) that molecular weight is 600, and its grade is chemically pure, by Pr...

Embodiment 2

[0053] refer to figure 1 , figure 1 It is the flow process of the preparation method of a kind of dispersion stable nanometer 8YSZ aqueous phase suspension of the present invention Figure 1 .

[0054] This implementation provides a kind of preparation method of dispersed stable nano 8YSZ aqueous phase suspension, comprising the following steps:

[0055] S1. Configuration of initial suspension liquid: Weigh nanometer 8YSZ powder, add deionized water, stir evenly, and obtain initial suspension liquid with a solid phase mass fraction of 20%;

[0056] S2. Dispersion of the suspension: adding a dispersant to the initial suspension liquid for dispersion treatment to obtain a suspension.

[0057] This dispersion agent is the polyethylene glycol reagent (being called for short PEG) that mass fraction is 0~4%, and this polyethylene glycol reagent is the polyethylene glycol reagent (being called for short PEG2000) that molecular weight is 2000, and its grade is chemically pure, by ...

Embodiment 3

[0064] refer to figure 1 , figure 1 It is the flow process of the preparation method of a kind of dispersion stable nanometer 8YSZ aqueous phase suspension of the present invention Figure 1 .

[0065] This implementation provides a kind of preparation method of dispersed stable nano 8YSZ aqueous phase suspension, comprising the following steps:

[0066] S1. Configuration of initial suspension liquid: Weigh nanometer 8YSZ powder, add deionized water, stir evenly, and obtain initial suspension liquid with a solid phase mass fraction of 20%;

[0067] S2. Dispersion of the suspension: adding a dispersant to the initial suspension liquid for dispersion treatment to obtain a suspension.

[0068] The dispersant is a polypropylene agent (abbreviated as PAA) with a mass fraction of 0-4%, its grade is chemically pure, and it is provided by Shandong Taihe Water Treatment Co., Ltd.

[0069] The nano 8YSZ powder has a particle size of 40nm and a specific surface area of ​​25m 2 / g, p...

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Abstract

The invention relates to the technical field of nano material dispersion, in particular to a preparation method of a stably dispersed nano 8YSZ aqueous phase suspension. The preparation method comprises the following steps: weighing nano 8YSZ powder, adding deionized water, and uniformly stirring to obtain a suspension initial solution with the solid-phase mass fraction of 10-30%; and adding a dispersing agent into the suspension initial solution, and carrying out dispersion treatment to obtain a suspension. By adding the dispersing agent, a double mechanism of electrostatic stability and steric hindrance is formed in the suspension, so that the dispersion of nano particles is realized. The electrostatic stabilization mechanism is that a double-electric-layer structure is formed on the surfaces of the particles, and the same charges on the surfaces of the particles repel each other to realize a dispersion effect. According to the steric hindrance mechanism, the dispersing agent is adsorbed to the surfaces of nano particles, polymers on the adjacent particles repel each other due to the volume effect, the energy potential barrier which must be overcome by nano particle aggregation is improved, and therefore dispersion of the particles in suspension liquid is achieved.

Description

technical field [0001] The invention relates to the technical field of dispersion of nanometer materials, in particular to a method for preparing a dispersed and stable nanometer 8YSZ aqueous phase suspension. Background technique [0002] Y 2 o 3 (8YSZ) is a high-temperature-resistant oxide with high melting point, high hardness, and low thermal conductivity. It is widely used in the preparation of high-performance thermal barrier coatings (TBCs) by thermal spraying. Nanoparticles have the characteristics of large specific surface area, small size effect, interface and surface effect, quantum size effect, etc., and have many excellent properties that cannot be compared with conventional particles in terms of catalysis, optics, magnetism, mechanics, etc., making them have broad application prospects . Combining nanomaterials with surface coating technology, the suspension plasma spraying process is used to prepare composite coatings containing nanostructures, which have t...

Claims

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Application Information

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IPC IPC(8): C09D7/61
CPCC09D7/61C08K3/22C08K2201/011
Inventor 许艳华颜文煅何惜琴钟明灯何其明苏茶旺吴婧车燕梅
Owner MINNAN INST OF SCI & TECH
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