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Waste paper aerogel, aerogel derivative and preparation method thereof

A technology of airgel and derivatives, applied in the direction of chemical instruments and methods, carbon preparation/purification, phosphide, etc., can solve the problem that the honeycomb porous structure cannot be effectively maintained, the metal organic framework structure is easily damaged, and the aerogel Not resistant to high temperature calcination, etc., to achieve the effect of easy large-scale production, short cycle and high production efficiency

Pending Publication Date: 2021-04-02
SICHUAN UNIV
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AI Technical Summary

Problems solved by technology

[0004] The preparation of airgel from waste paper in the prior art is complex, costly, and highly polluting to the environment. For example, the methods disclosed in CN2016112074128, CN2019100559969, and CN2017104470419 require the use of alkali to make airgel from waste paper. Cellulose dissolution and gelation followed by freeze-drying
The airgel prepared by using these prior art waste papers is easy to destroy the metal organic framework structure, and seriously affects the crosslinking of cellulose, inhibiting gelation
In addition, in the process of phosphating or phosphorylation, the airgel prepared from the existing waste paper is not resistant to high temperature calcination, not resistant to water heat, and its honeycomb porous structure cannot be effectively maintained.

Method used

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  • Waste paper aerogel, aerogel derivative and preparation method thereof
  • Waste paper aerogel, aerogel derivative and preparation method thereof
  • Waste paper aerogel, aerogel derivative and preparation method thereof

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preparation example Construction

[0058] In order to solve the third technical problem of the present invention, the preparation method of the metal organic framework derivative@composite carbon airgel includes:

[0059] a. Mix the airgel with the metal-organic framework precursor solution to obtain a mixture, aging or hydrothermal treatment to obtain a metal-organic framework@carbon aerogel;

[0060] Preferably, the mass ratio of the airgel to the metal-organic framework precursor is 3-5:50-100

[0061] b. Phosphating or phosphating metal-organic framework@carbon aerogel, using high-temperature carbonization or hydrothermal treatment to obtain metal-organic framework derivatives@composite carbon aerogel;

[0062] The metal organic framework precursor solution is a mixed solution of at least one of cobalt nitrate, iron nitrate, zinc nitrate, cerium nitrate, zirconium nitrate and an organic ligand, and the organic ligand is isophthalic acid, terephthalic acid , at least one of 2-methylimidazoles;

[0063] The...

Embodiment 1

[0077] Shred 10 g of printed waste paper, add 1 L of deionized water, and stir mechanically for 6 h. After the waste paper was stirred into debris, 0.14mol sodium hypochlorite was added, and the pH was adjusted to 4.5 with glacial acetic acid. The waste paper slurry was stirred at a constant temperature in a water bath at 80°C for 2h. Water and ethanol were used to repeatedly suction filter and wash the waste paper slurry 3 times. Finally, 1L of ethanol was added to the waste paper to disperse evenly, the waste paper airgel was obtained by suction filtration, and the waste paper airgel was obtained by drying. Put the waste paper airgel into a tube furnace, pass through Ar, heat up at a heating rate of 5°C / min, carbonize at a specified temperature of 1000°C for 2 hours, and naturally cool down to obtain waste paper carbon airgel. 300 mg of cobalt nitrate and 600 mg of 2-methylimidazole were dissolved in 20 ml of methanol, respectively. The cobalt nitrate solution was quickly...

Embodiment 2

[0085] Shred 10 g of printed waste paper, add 1 L of deionized water, and stir mechanically for 6 h. After the waste paper was stirred into debris, 0.14mol sodium hypochlorite was added, and the pH was adjusted to 4.5 with glacial acetic acid. The waste paper slurry was stirred at a constant temperature in a water bath at 80°C for 2h. Water and ethanol were used to repeatedly suction filter and wash the waste paper slurry 3 times. Finally, 1L of ethanol was added to the waste paper to disperse evenly, the waste paper airgel was obtained by suction filtration, and the waste paper airgel was obtained by drying. Put the waste paper airgel into a tube furnace, pass through Ar, heat up at a heating rate of 5°C / min, carbonize at a specified temperature of 1000°C for 2 hours, and naturally cool down to obtain waste paper carbon airgel. 300 mg of cobalt nitrate and 600 mg of 2-methylimidazole were dissolved in 20 ml of methanol, respectively. The cobalt nitrate solution was quickly...

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Abstract

The invention relates to waste paper aerogel, an aerogel derivative and a preparation method thereof, and belongs to the technical field of aerogel materials. The method comprises the following steps:soaking the waste paper, deinking, carrying out surface functionalization treatment, carrying out suction filtration, molding and drying to obtain waste paper aerogel, and calcining at 400-1000 DEG Cto obtain waste paper carbon aerogel; wherein the surface functionalization treatment is as follows: a compound A solution is used for treating the waste paper, the pH value of the treatment is 4-4.5, the treatment temperature is 70-80 DEG C, the treatment time is 2-6 hours, and the compound A is one of hydrogen peroxide, sodium hypochlorite, sodium chlorite and sodium periodate. The method for preparing aerogel from waste paper has the advantages of simple preparation process, short period, small secondary pollution and the like. The prepared aerogel is more stable. The metal organic framework derivative-coated waste paper-based composite carbon aerogel can load a large number of electrocatalytic active substances, is light in weight and high in conductivity, and can be widely applied tocommercial electrocatalytic materials.

Description

technical field [0001] The invention relates to a waste paper airgel, an airgel derivative and a preparation method thereof, and belongs to the technical field of airgel materials. Background technique [0002] The recycling of waste printing paper, corrugated paper, paper towels, etc. in daily life has become one of the focuses of people's urgent attention. Realizing the recycling of waste paper is of great significance in solving resource consumption and environmental pollution. At present, the three mainstream applications of waste paper recycling include making recycled paper, making household appliances, and solid fuel for power generation. [0003] At present, realizing the recycling of waste paper with high added value is one of the major challenges currently facing. Waste paper contains a large amount of cellulose. Using waste paper as a source of cellulose raw materials to prepare cellulose carbon airgel can realize high value-added recycling of waste paper, allevi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B25/08C01B25/37C08L87/00C08K7/24C08G83/00C25B1/02C25B11/04
CPCC01B32/05C01B25/08C01B25/37C08K7/24C08G83/008C25B1/02C25B11/04C01P2004/80C08L87/00
Inventor 郭荣辉崔策赖小旭
Owner SICHUAN UNIV
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