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Preparation method for high temperature-resistant microwave-permeable aluminum hydroxide/polyethersulfone composite material

A technology of aluminum hydroxide and composite materials, applied in the direction of coating, can solve the problems of poor high temperature performance, complex preparation process, small application field, etc., and achieve the effects of long service life, simple preparation process and easy operation

Active Publication Date: 2014-02-05
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation technology mainly focuses on shielding the radiation heat transfer of ceramic materials such as quartz and silicon nitride at high temperatures, and its preparation process is complicated and costly.
Chinese patent (CN 1676617A) discloses a preparation method of a high-temperature-resistant wave-transmitting material for steelmaking furnaces. First, the high-silica fiber fabric preform is impregnated in chromium-aluminum phosphate, and then cooled at room temperature and molded. , the material prepared by this method can only meet the working conditions of steelmaking furnace transmission microwave 6.3GHz~26GHz, so the application field of the material is small
Polyethersulfone is a thermoplastic polymer material with excellent comprehensive properties. It has stable physical and chemical properties and good microwave permeability. In addition, polyethersulfone has excellent high-temperature creep resistance and heat resistance, and can still withstand high temperatures Maintain stable physical and chemical properties, but its resistance to high temperatures above 300°C is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of polyethersulfone support:

[0027] a. First pour 20g of N,N-dimethylacetamide solvent into a beaker, then add 14g of polyethersulfone powder with a particle size of 1.5μm into the N,N-dimethylacetamide solvent, magnetically stir and Heat the mixed solution to a temperature of 80°C; after the polyethersulfone is fully dissolved, pour the mixed solution of polyethersulfone-N,N-dimethylacetamide into a biochemical petri dish.

[0028] b. First, put the biochemical petri dish containing the polyethersulfone-N,N-dimethylacetamide mixed solution in an oven, and dry it at 80°C for 15 hours; then raise the temperature of the oven to 130°C and keep it warm 2h; then the temperature of the oven was naturally cooled to room temperature to make a polyethersulfone support.

[0029] (2) Preparation of aluminum hydroxide emulsion:

[0030] First pour 14g of N,N-dimethylacetamide into a beaker, then add 16g of phosphoric acid with a concentration of 85% by mass, sti...

Embodiment 2

[0037] (1) Preparation of polyethersulfone support:

[0038]a. First pour 30g of N,N-dimethylacetamide solvent into a beaker, then add 15g of polyethersulfone powder with a particle size of 1.5μm into the N,N-dimethylacetamide solvent, magnetically stir and Heat the mixed solution to a temperature of 83°C; after the polyethersulfone is fully dissolved, pour the mixed solution of polyethersulfone-N,N-dimethylacetamide into a biochemical petri dish.

[0039] b. First, put the biochemical petri dish containing the polyethersulfone-N,N-dimethylacetamide mixed solution in an oven, and dry it at 85°C for 16 hours; then raise the temperature of the oven to 135°C and keep it warm 2.5h; after 2.5h, the temperature of the oven was naturally cooled to room temperature to prepare a polyethersulfone support.

[0040] (2) Preparation of aluminum hydroxide emulsion:

[0041] First pour 16 g of N,N-dimethylacetamide into a beaker, then add 19 g of phosphoric acid with a concentration of 85%...

Embodiment 3

[0048] (1) Preparation of polyethersulfone support:

[0049] a. First pour 40g of N,N-dimethylacetamide solvent into a beaker, then add 17g of polyethersulfone powder with a particle size of 1.5μm into the N,N-dimethylacetamide solvent, magnetically stir and Heat the mixed solution to a temperature of 86°C; after the polyethersulfone is fully dissolved, pour the mixed solution of polyethersulfone-N,N-dimethylacetamide into a biochemical petri dish.

[0050] b. First, put the biochemical petri dish containing the polyethersulfone-N,N-dimethylacetamide mixed solution in an oven, and dry it at 90°C for 17 hours; then raise the temperature of the oven to 140°C and keep it warm 2.5h; then the temperature of the oven was naturally cooled to room temperature to prepare a polyethersulfone support.

[0051] (2) Preparation of aluminum hydroxide emulsion:

[0052] First pour 18 g of N,N-dimethylacetamide into a beaker, then add 22 g of phosphoric acid with a concentration of 85% by ma...

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Abstract

The invention discloses a preparation method for a high temperature-resistant microwave-permeable aluminum hydroxide / polyethersulfone composite material. The method comprises the following steps: dissolving polyethersulfone powder in an N,N-dimethylacetamide solvent and carrying out drying to prepare a polyethersulfone support; uniformly dispersing aluminum hydroxide powder in a mixed solution of N,N-dimethylacetamide and phosphoric acid to prepare an aluminum hydroxide emulsion; and dumping the aluminum hydroxide emulsion into a culture dish filled with the polyethersulfone support and carrying out a series of heat treatment at a temperature of 80 to 200 DEG C so as to prepare the aluminum hydroxide / polyethersulfone composite material with excellent high temperature resistance and microwave permeability. The aluminum hydroxide / polyethersulfone composite material prepared in the invention has high mechanical strength and excellent microwave permeability and can meet requirements for the working condition of an instant high temperature of 900 to 1000 DEG C. The preparation method provided by the invention has the advantages of simple procedures, easy operation and low cost.

Description

technical field [0001] The invention relates to a preparation method of a composite material with excellent high temperature resistance and microwave transmission performance, in particular to a preparation method of a high temperature resistance and microwave transmission aluminum hydroxide / polyethersulfone composite material. Background technique [0002] Microwave refers to electromagnetic waves with a frequency between 0.3 and 300 GHz and a wavelength in the range of 1 to 1000 mm. It is an abbreviation for a limited frequency band in radio waves. Microwave heating has the advantages of immediacy, integrity, selectivity, and high energy utilization. At the same time, microwave heating is safe, hygienic, non-polluting, and has a strong bactericidal ability. In addition, microwave heating also has the advantages of high heating efficiency, compact equipment, and small footprint. Therefore, in daily life and industrial production, microwave heating technology has been wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J7/00C08L81/06C08K3/22
Inventor 杨育林左镇宋来洲李飞贺君朱青海
Owner YANSHAN UNIV
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