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A kind of high performance adsorption material and preparation method thereof

An adsorption material, high-performance technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problems of high toxicity of raw materials and reagents, cumbersome and time-consuming preparation steps, expensive template agents, etc., and achieve excellent structural stability. , the effect of promoting internal diffusion and mass transfer processes, and controllable surface properties

Inactive Publication Date: 2019-02-26
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The purpose of the present invention is to solve the prior art, CO 2 The preparation steps of nitrogen-doped carbon materials for adsorption are cumbersome and time-consuming, the templates used are expensive, the raw material reagents are highly toxic, the nitrogen content of the obtained products is low, and the shape is uncontrollable; a high-performance adsorption material and its preparation method

Method used

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  • A kind of high performance adsorption material and preparation method thereof
  • A kind of high performance adsorption material and preparation method thereof
  • A kind of high performance adsorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A method for preparing a high-performance adsorption material, characterized in that it comprises the following steps:

[0058] 1) Preparation of polyamic acid (PAA) solution

[0059] 1.1) Recrystallize 4,4′-diaminodiphenyl ether (ODA) with ethanol, and seal it for storage; use acetic anhydride for recrystallization of pyromellitic dianhydride (PMDA), and keep it sealed;

[0060] 1.2) The water in the polar solvent is removed by vacuum distillation, and the redistilled polar solvent is placed in a desiccator for preservation;

[0061] The polar solvent is N-methylpyrrolidone (NMP).

[0062] 1.3) At room temperature and nitrogen atmosphere, add the recrystallized 4,4'-diaminodiphenyl ether and pyromellitic dianhydride obtained in step 1.1) to the redistilled dianhydride obtained in step 1.2). In a polar solvent, polycondensation reaction is carried out after stirring (such as Figure 10 Shown), be prepared into the polyamic acid solution that solid content is 5wt%;

...

Embodiment 2

[0087] A method for preparing a high-performance adsorption material, characterized in that it comprises the following steps:

[0088] 1) Preparation of polyamic acid (PAA) solution

[0089] 1.1) Recrystallize 4,4′-diaminodiphenyl ether (ODA) with ethanol, and seal it for storage; use acetic anhydride for recrystallization of pyromellitic dianhydride (PMDA), and keep it sealed;

[0090] 1.2) The water in the polar solvent is removed by vacuum distillation, and the redistilled polar solvent is placed in a desiccator for preservation;

[0091] The polar solvent is N-methylpyrrolidone (NMP).

[0092]1.3) At room temperature and nitrogen atmosphere, add the recrystallized 4,4'-diaminodiphenyl ether and pyromellitic dianhydride obtained in step 1.1) to the redistilled dianhydride obtained in step 1.2). In a polar solvent, polycondensation reaction is carried out after stirring (such as Figure 10 Shown), be prepared into the polyamic acid solution that solid content is 10wt%;

...

Embodiment 3

[0108] A method for preparing a high-performance adsorption material, characterized in that it comprises the following steps:

[0109] 1) Preparation of polyamic acid (PAA) solution

[0110] 1.1) Recrystallize 4,4′-diaminodiphenyl ether (ODA) with ethanol, and seal it for storage; use acetic anhydride for recrystallization of pyromellitic dianhydride (PMDA), and keep it sealed;

[0111] 1.2) The water in the polar solvent is removed by vacuum distillation, and the redistilled polar solvent is placed in a desiccator for preservation;

[0112] The polar solvent is N-methylpyrrolidone (NMP).

[0113] 1.3) At room temperature and nitrogen atmosphere, add the recrystallized 4,4'-diaminodiphenyl ether and pyromellitic dianhydride obtained in step 1.1) to the redistilled dianhydride obtained in step 1.2). In a polar solvent, polycondensation reaction is carried out after stirring (such as Figure 10 Shown), be prepared into the polyamic acid solution that solid content is 15wt%; ...

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Abstract

The invention discloses a high-performance adsorption material and a preparation method thereof. A hierarchical-pore nitrogen doped carbon / MgO composite microsphere material is prepared by performing a high-temperature thermal treatment carbonization method on polyimide serving as a carbon and nitrogen source, polyurethane foam serving as a macroporous scaffold and metal magnesium salt serving as an additive. According to the high-performance adsorption material and the preparation method thereof, the use of an expensive template agent and a toxic raw material reagent is avoided; the prepared composite microsphere material has an ideal flower-shaped spherical appearance, is of a hierarchical-pore structure with micro holes and macro holes, has controllable surface characteristics, excellent structural stability, high nitrogen content and magnesium content, and shows high adsorption volume and excellent circulating stability when used as a CO2 adsorption material. The preparation method disclosed by the invention is simple and feasible; the process is controllable, and the reaction time is short; furthermore, no complicated experimental equipment and complicated experimental steps are needed; and the industrial large-scale production is facilitated.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a high-performance adsorption material and a preparation method thereof. Background technique [0002] The current energy system and infrastructure around the world mainly rely on the use of fossil fuels, the combustion of which is accompanied by a large amount of anthropogenic CO emissions 2 Gases, these supernatural carbon cycles have caused serious harm to the environment, and the ensuing ecological problems such as global warming, melting of polar glaciers, and rising sea levels have become increasingly apparent, and have seriously threatened the survival and development of human society. Anthropogenic capture of CO 2 It is the most economical and feasible method to reduce greenhouse gas emissions and slow down global warming on a large scale. [0003] The adsorption method has the advantages of mild operating conditions, low energy consumption, stable performance, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01D53/02B01D2253/102B01D2253/1124B01D2257/504B01J20/0259B01J20/041B01J20/20B01J20/28021B01J2220/42B01J2220/4806B01J2220/4812Y02C20/40
Inventor 刘玉荣刘碧桃张进
Owner CHONGQING UNIV OF ARTS & SCI
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