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Inorganic/organic mutually doped hydrophobic polyimide aerogel and preparation method thereof

A polyimide and inorganic gel technology, which is applied in the fields of inorganic/organic inter-doped hydrophobic polyimide aerogel and green preparation, and can solve the problems of reduced performance and difficult molding of modified aerogel materials.

Active Publication Date: 2021-12-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the doping material accumulates or aggregates during the preparation of the airgel, the concentration of stress or the poor contact of the inorganic-organic interface will make the modified airgel material difficult to form or the performance will be reduced instead.

Method used

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  • Inorganic/organic mutually doped hydrophobic polyimide aerogel and preparation method thereof
  • Inorganic/organic mutually doped hydrophobic polyimide aerogel and preparation method thereof
  • Inorganic/organic mutually doped hydrophobic polyimide aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides an inorganic / organic doped hydrophobic polyimide gas gel and a green preparation method comprising the steps of:

[0042] 1) Preparation of the polyamic acid solution: 2.436 g of 4,4'-diaminophenylene ether and 2.436 g of 3,4'-di amino diphenyl ether were dissolved in 80 ml N, N-dimethyl. Among the acetamide, 5.128 g of 1,2,4,5-xenobhenic tetramethrhalate is slowly added to the solution to be stabilized. The mixture was stirred for 3 hours to obtain and pale yellow transparent viscous polyamic acid solution.

[0043] 2) Preparation of the polyamic acid precursor: Under 5 ° C, the light yellow transparent viscous polyamic acid solution was mixed with 2.46 g of triethylamine and stirred for 1.5 hours to give a transparent viscous uniform polyamic acid precursor. Sketch. The polyamic acid precursor sol was slowly put into 1 L of deionized water to obtain a white polyamic acid precursor precipitate, and the precipitate was washed five times to its org...

Embodiment 2

[0052] This embodiment provides an inorganic / organic-doped hydrophobic polyimide gas gel and a green preparation method, and the preparation process is substantially the same as in Example 1, and only the carbon quantum point is not added to compare. Includes the following steps:

[0053] 1) Preparation of the polyamic acid solution: 2.436 g of 4,4'-diaminophenylene ether and 2.436 g of 3,4'-di amino diphenyl ether were dissolved in 80 ml N, N-dimethyl. Among the acetamide, 5.128 g of 1,2,4,5-xenobhenic tetramethrhalate is slowly added to the solution to be stabilized. The mixture was stirred for 3 hours to obtain and pale yellow transparent viscous polyamic acid solution.

[0054] 2) Preparation of the polyamic acid precursor: Under 5 ° C, the light yellow transparent viscous polyamic acid solution was mixed with 2.46 g of triethylamine and stirred for 1.5 hours to give a transparent viscous uniform polyamic acid precursor. Sketch. The polyamic acid precursor sol was slowly put...

Embodiment 3

[0059] This embodiment provides a polyimide gas gel and a green preparation method, and the preparation process is substantially the same as in Example 1, and only the cobalt iron oxide inorganic gel is added as the following steps:

[0060] 1) Preparation of the polyamic acid solution: 2.436 g of 4,4'-diaminophenylene ether and 2.436 g of 3,4'-di amino diphenyl ether were dissolved in 80 ml N, N-dimethyl. Among the acetamide, 5.128 g of 1,2,4,5-xenobhenic tetramethrhalate is slowly added to the solution to be stabilized. The mixture was stirred for 3 hours to obtain and pale yellow transparent viscous polyamic acid solution.

[0061] 2) Preparation of the polyamic acid precursor: Under 5 ° C, the light yellow transparent viscous polyamic acid solution was mixed with 2.46 g of triethylamine and stirred for 1.5 hours to give a transparent viscous uniform polyamic acid precursor. Sketch. The polyamic acid precursor sol was slowly put into 1 L of deionized water to obtain a white pol...

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Abstract

The invention discloses a preparation method and performance test of a low-density hydrophobic polyimide aerogel material with a green and convenient preparation process. A water-soluble polyamide acid precursor is synthesized from a diamine monomer and a dianhydride monomer. Wet gel is continuously prepared by using the polyamide acid precursor, and further the hydrophobic polyimide aerogel is prepared by adopting processes such as freeze drying and thermal amidation. The aerogel prepared by the invention has the characteristics of hydrophobicity, suitability for various molding and pouring processes, simple preparation process, great reduction of organic matter volatilization in the preparation process and the like. The interior of the material is porous, the density is less than 0.1 g / cm<3>, the water contact angle on the surface of the aerogel can reach 120 degrees or more, and the aerogel has good thermal performance. The material has a large application space in the fields of heat insulation, catalysis, organic matter adsorption, air filtration and the like.

Description

Technical field [0001] The present invention relates to the field of high performance airgel, and more particularly to an inorganic / organic doped hydrophobic polyimide gas gel and a green preparation method. Background technique [0002] The airgel is a generally known as a type of solid matter having a high porosity and low density. In general, airgels have the characteristics of low thermal conductivity, high ratios area, making it a wide range of applications in many areas such as building insulation, equipment instrument protection. Traditional airgels are generally inorganic silica gels, which are generally prepared by sol gel. However, its mechanical properties are poor, and the disadvantages of easy removal slag restricts no silicon artic gel in various fields. More excellent organic polymer gels such as flexibility have limited restrictions on their applicability due to poor thermal stability. [0003] Polyimide is a class having a high glass transition temperature, hig...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08G73/10C08K3/04C08K3/22C08K9/02
CPCC08K3/22C08K9/02C08K3/042C08G73/1071C08G73/1042C08G73/1028C08L79/08
Inventor 郑玉婴熊立尧
Owner FUZHOU UNIV
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