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A kind of three-dimensional graphene composite airgel and preparation method thereof

A graphene composite and aerogel technology, applied in gel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problems of high cost, complicated operation, and single structure of the preparation method, and achieve rich porosity and simple equipment , good electrical conductivity

Active Publication Date: 2019-06-04
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 preparation method of oil-absorbing materials, and to provide a three-dimensional graphene composite preparation method using nanofibers and graphene oxide. Airgel Efficient Sorbent Method

Method used

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  • A kind of three-dimensional graphene composite airgel and preparation method thereof
  • A kind of three-dimensional graphene composite airgel and preparation method thereof
  • A kind of three-dimensional graphene composite airgel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Rinse the bamboo purchased in the market, dry it and crush it through an 80-mesh sieve to obtain bamboo powder; take 1 g of the crushed bamboo powder, extract it with phenylethyl alcohol at a ratio of 1:2, remove some organic matter, and then adjust it with glacial acetic acid Add 1wt% NaClO under the condition of pH 4.5 2 Bleach by heating at 75°C for 1 hour;

[0047] 2. The bamboo powder after the bleaching is prepared as a 1wt% dispersion, and then the nanofiber dispersion is obtained by mechanical processing;

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

[0049] 4. The uniformly dispersed nanofibers obtained in step 3 are used for ion exchange and mechanical treatment, so that the surface of the nanofibers is grafted with positively charged PEI to o...

Embodiment 2

[0056] 1. The eucalyptus pulp purchased in the market is dried and pulverized through an 80-mesh sieve to obtain eucalyptus pulp powder; take 1 g of pulverized eucalyptus pulp powder, use phenylethyl alcohol to extract by 1:2, remove some organic matter, and then Use glacial acetic acid to adjust the pH to 4.5 and add 1wt% NaClO 2 Bleach by heating at 75°C for 1 hour;

[0057] 2. The bamboo powder after the bleaching is prepared as a 1wt% dispersion, and then the nanofiber dispersion is obtained by mechanical processing;

[0058] 3. Stir the 1wt% nanofiber solution obtained in step 2 on a magnetic stirrer at 500 rpm at room temperature and pressure for 5 minutes, and then process it with an ultrasonic pulverizer at 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, and the surface active agent CTAB is used to modify the surface with...

Embodiment 3

[0066] 1. Dried industrial waste crab shells and crushed them through an 80-mesh sieve to obtain crab shell powder; take 1g of crushed crab shell powder and extract them with phenylethyl alcohol at a ratio of 1:2 to remove some organic matter, and then use glacial acetic acid Adjust the pH to 4.5 by adding 1wt% NaClO 2 Bleach by heating at 75°C for 1 hour;

[0067] 2. Prepare the bleached crab shell powder as a dispersion with a weight fraction of 1 wt%, and then process it mechanically in combination with TEMPO pre-oxidation to obtain a nanofiber dispersion;

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

[0069] 4. The uniformly dispersed nanofibers obtained in step 3 are subjected to ion exchange and mechanical treatment, and the surfactant CTAB is us...

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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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Patent Type & Authority Patents(China)
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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