Porous material and its preparation method

A technology of porous materials and matrix materials, applied in the field of materials, can solve problems such as poor compatibility and lack of universality

Inactive Publication Date: 2012-11-07
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these commonly used porogens, whether they are inorganic porogens or small molecular organic substances, have poor compatibility with polymer solutions, and high molecular porogens are only compatible with specific one or several polymers. Good, not universal

Method used

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  • Porous material and its preparation method
  • Porous material and its preparation method
  • Porous material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 0.1g of polyimide prepolymers with a number average molecular weight of 1000 was dissolved in 5g of solvent N, N-dimethylacetamide (DMAc), dispersed uniformly by ultrasonic, added 0.048g terephthalaldehyde, dissolved and dispersed uniformly, Then add 0.052g triethylenetetramine and react at 25°C for 0.5 hours, dry at 80°C for 2 hours to volatilize to form a film, then soak in 2M hydrochloric acid solution for 1 hour, and decompose the Schiff base into terephthalaldehyde under acidic conditions and triethylenetetramine, washed 3 times with 2M hydrochloric acid solution to remove the Schiff base to obtain a polyimide prepolymer porous membrane.

[0041] In order to improve the thermal stability of the polyimide prepolymer porous membrane, the prepolymer porous membrane was cured according to the following steps: heat preservation at 80°C for 1h, heat preservation at 120°C for 1h, heat preservation at 160°C for 1h, heat preservation at 200°C 1h, 250°C for 1h, and 300°C for...

Embodiment 2

[0043] Dissolve 0.1g of polyimide prepolymer with a number-average molecular weight of 5000 in 5g of solvent N,N-dimethylacetamide (DMAc), and disperse evenly by ultrasonic, then add 0.041g of terephthalaldehyde, dissolve and disperse evenly , then add 0.059g tetraethylenepentamine and react at 25°C for 0.5 hours, dry at 80°C for 2 hours to volatilize to form a film, then soak in 2M hydrochloric acid solution for 1 hour, and decompose the Schiff base into terephthalaldehyde and Tetraethylenepentamine was washed three times with 2M hydrochloric acid solution to remove the Schiff base to obtain a polyimide prepolymer porous membrane.

[0044] In order to improve the thermal stability of the polyimide prepolymer porous membrane, the prepolymer porous membrane was cured according to the following steps: heat preservation at 80°C for 1h, heat preservation at 120°C for 1h, heat preservation at 160°C for 1h, and heat preservation at 200°C for 1h , 250° C. for 1 h, and 300° C. for 1 h...

Embodiment 3

[0046] 0.1g of polyimide prepolymer with a number average molecular weight of 3000 was dissolved in 5g of solvent N, N-dimethylacetamide (DMAc), dispersed uniformly by ultrasonic, added 0.055g of terephthalaldehyde, dissolved and dispersed uniformly, Then add 0.045g p-phenylenediamine, react at 25°C for 0.5 hours, dry at 80°C for 2 hours, volatilize and form a film, then soak in 2M hydrochloric acid solution for 1 hour, and decompose the Schiff base into terephthalaldehyde and P-phenylenediamine was washed three times with 2M hydrochloric acid solution to remove the Schiff base to obtain a polyimide prepolymer porous membrane.

[0047] In order to improve the thermal stability of the polyimide prepolymer porous membrane, the prepolymer porous membrane was cured according to the following steps: heat preservation at 80°C for 1h, heat preservation at 120°C for 1h, heat preservation at 160°C for 1h, and heat preservation at 200°C for 1h , 250°C for 1h, 300°C for 1h to form a poly...

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Abstract

The invention discloses a porous material and its preparation method. The method comprises the following steps of: uniformly mixing a base material and polyaldehyde or polyketones in a solvent, then adding polyamine for a reaction, forming a film after the reaction, and immersing and washing in an acid to obtain the porous material. The method can be used to prepare different porous materials, and simultaneously pore size distribution from nanometer to micron order is controllable. The preparation method provided by the invention has advantages of simple method and process, high preparation efficiency and good universality, is green and environmentally friendly, and is beneficial to large-scale production. In addition, raw materials can be recovered and repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a porous material and a preparation method thereof. Background technique [0002] Porous materials refer to materials with a large number of pore structures of a certain size and a relatively high specific surface area. Porous materials generally have the characteristics of low relative density, high specific surface area, light weight, sound insulation, heat insulation, good permeability and excellent adsorption performance, so they are widely used in aerospace, electronic communication, transportation, atomic energy, medicine, environmental protection , metallurgy, machinery, construction, electrochemistry, and petrochemicals, involving adsorption, separation, filtration, noise reduction, heat insulation, electromagnetic shielding, energy storage, drug loading, catalytic reactions, and bioengineering. and play an important role in national economic construction. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J9/26C08J5/18C08L81/06C08L79/08C08L25/06C08L67/04C08L27/16C08L33/12C08L63/00C08L61/06C08L61/24
Inventor 杨振忠孟照凯李焦丽屈小中
Owner INST OF CHEM CHINESE ACAD OF SCI
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