Three-dimensionalgraphene composite aerogel and preparation method thereof

A graphene composite and aerogel technology, applied in the directions of gel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problems of high cost of preparation methods, single structure, complicated operation, etc., and achieve rich porosity and simple equipment. , a wide range of effects

Active Publication Date: 2017-06-27
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of single unadjustable structure, high cost of preparation method and complicated operation in the existing prepar

Method used

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  • Three-dimensionalgraphene composite aerogel and preparation method thereof
  • Three-dimensionalgraphene composite aerogel and preparation method thereof
  • Three-dimensionalgraphene composite aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] Example 1:

[0046] 1. Rinse the bamboo material purchased in the market, dry it and pulverize it through an 80-mesh screen to obtain bamboo powder; take 1g of the pulverized bamboo powder, extract it with phenethyl alcohol at a ratio of 1:2 to remove some organic matter, and then adjust it with glacial acetic acid Add 1wt% NaClO under the condition of pH 4.5 2 Heat at 75℃ for 1h to bleach;

[0047] 2. Prepare the bleached bamboo powder into a 1wt% dispersion, and then mechanically process it to obtain a nanofiber dispersion;

[0048] 3. Stir the 1 wt% nanofiber solution obtained in step 2 on a magnetic stirrer at 500 rpm and normal temperature and pressure for 10 minutes, and then use an ultrasonic mill, 1000 W, for 20 minutes to obtain a uniformly dispersed nanofiber dispersion;

[0049] 4. The uniformly dispersed nanofibers obtained in step 3 use ion exchange methods and mechanical treatment methods to graft positively charged PEI on the surface of the nanofibers to obtain n...

Example Embodiment

[0055] Example 2:

[0056] 1. The eucalyptus pulp purchased in the market is dried and then pulverized through an 80 mesh screen to obtain eucalyptus pulp powder; take 1g of the pulverized eucalyptus pulp powder and extract 1:2 with phenethyl alcohol to remove some organic matter, and then Use glacial acetic acid to adjust pH to 4.5 and add 1wt% NaClO 2 Heat at 75℃ for 1h to bleach;

[0057] 2. Prepare the bleached bamboo powder into a 1wt% dispersion, and then mechanically process it to obtain a nanofiber dispersion;

[0058] 3. Stir the 1 wt% nanofiber solution obtained in step 2 on a magnetic stirrer at 500 rpm at room temperature and pressure for 5 minutes, and then treat it with an ultrasonic mill 1200W for 10 minutes to obtain a uniformly dispersed nanofiber dispersion;

[0059] 4. The uniformly dispersed nanofibers obtained in step 3 are subjected to ion exchange and mechanical treatment methods, and surface active agent CTAB is used for surface cation modification to obtain na...

Example Embodiment

[0065] Example 3:

[0066] 1. Dry the industrial waste crab shells and crush them through an 80 mesh screen to obtain crab shell powder; take 1g of crushed crab shell powder and extract 1:2 with phenethyl alcohol to remove some organic matter, and then use glacial acetic acid Add 1wt% NaClO under the condition of adjusting pH to 4.5 2 Heat at 75℃ for 1h to bleach;

[0067] 2. Prepare the bleached crab shell powder into a dispersion with a weight fraction of 1 wt%, and then process the nanofiber dispersion with a mechanical method combined with TEMPO pre-oxidation;

[0068] 3. Stir the 1 wt% nanofiber solution obtained in step 2 on a magnetic stirrer at 300 rpm and normal temperature and pressure for 5 minutes, and then treat it with an ultrasonic mill 1200W for 10 minutes to obtain a uniformly dispersed nanofiber dispersion;

[0069] 4. The uniformly dispersed nanofibers obtained in step 3 are modified by ion exchange and mechanical treatment, and surface active agent CTAB is used for...

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Abstract

The invention discloses three-dimensionalgraphene composite aerogel. High-molecular material nano fiber with a biomass polysaccharide structure is compounded with oxidized graphene through a surface electrostatic-force effect, and then the composite aerogelis prepared by utilizing hydrazine hydrate reduction and a method for high-temperature pyrolysis in an inert atmosphere. The invention further discloses a preparation method of the three-dimensionalgraphene composite aerogel. The method for preparing the three-dimensionalgraphene composite aerogel is simple, easy to operate, large in specific surface area, uniform in pore size distribution and good in electrical conductivity, and the chemical reactivity is improved.

Description

technical field [0001] The invention relates to a graphene composite airgel material, in particular to a three-dimensional graphene composite airgel prepared by using nanofibers and graphene oxide and a preparation method thereof. Background technique [0002] With the development of industry and the improvement of people's living standards, petroleum has increasingly become an important energy material for the survival and development of human society, and it is an important driving force for the advancement of society. However, in the process of oil resource exploitation, transportation, utilization and storage, some accidents often occur, causing oil spill accidents. According to incomplete statistics, nearly 10 million tons of oil enter various water bodies every day in the world, especially oil spill accidents at sea, which will destroy the ecological value of the ocean, deteriorate the natural environment, and cause very serious ecological consequences. At present, th...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/24B01J20/28B01J20/30C02F1/28C02F101/32
CPCB01J13/0065B01J20/20B01J20/24B01J20/28047B01J20/28057B01J20/28069B01J2220/4825C02F1/288C02F2101/32
Inventor 卢芸叶贵超孔雪琳
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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