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Preparation method of carbon-aerogel-based spherical anticorrosion magnetic material

A carbon aerogel and magnetic material technology, which is applied in the field of preparation of carbon aerogel-based spherical corrosion-resistant magnetic materials, can solve the problem of unprovided magnetic strength, uncomfortable surface coating, uneven pore size distribution, etc. problem, to achieve the effect of short preparation cycle, get rid of harsh restrictions, and low price

Inactive Publication Date: 2012-10-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technical scheme recorded in the patent literature with application number 200610116392.3 is to use formaldehyde and phenol as reaction raw materials to form carbon aerogel under the catalysis of alkali, and the obtained carbon aerogel is blocky, with small specific surface area and uneven pore size distribution , is not suitable as a surface coating layer; the technical solution recorded in the application number 200710168612.1 patent document prepares magnetic materials using liquid phase mixing, and the prepared materials are uniform, but the mixed aqueous solution of sugars and metal salts needs to be evaporated, heat treated, repeated The steps of water washing, pickling, centrifugal separation, etc. are complex, costly, and difficult to implement; the technical solution recorded in the patent document with application number 200510095009.6 uses sucrose to form a complete carbon coating after high pressure, but this operation process requires high pressure conditions, the requirements for equipment are relatively high, which greatly increases the difficulty of preparation
Moreover, the above two patent documents do not give any numerical value of the magnetic strength of the prepared materials.

Method used

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  • Preparation method of carbon-aerogel-based spherical anticorrosion magnetic material
  • Preparation method of carbon-aerogel-based spherical anticorrosion magnetic material
  • Preparation method of carbon-aerogel-based spherical anticorrosion magnetic material

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Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, the preparation method of the carbon airgel-based spherical corrosion-resistant magnetic material is carried out as follows:

[0031] 1. Weigh 0.1mol nickel nitrate, 0.01mol m-phenylenediamine and 0.2mol formaldehyde solution and place in 5.4g distilled water to prepare an aqueous solution, add 0.002mol citric acid and 0.005mol sodium lauryl sulfate to obtain a mixed solution, and obtain The mixed solution was gelled in an incubator at 80°C for 15 hours to form a nickel-containing gel;

[0032] 2. Dry the prepared nickel-containing gel at 110°C under vacuum for 3 hours, then carbonize at 600°C for 2 hours under the protection of a reducing atmosphere, and then continue to cool down to room temperature with reducing gas to obtain coated carbon gas condensation Glue Ni composite material; the reducing gas is a mixed gas of hydrogen and nitrogen, the content of hydrogen is 10% by volume, and the gas flow rate of the reducing gas is 0.1-10L / min.

[0033...

Embodiment 2

[0036] 1. Weigh 0.2mol of nickel nitrate, 0.05mol of hydroquinone and .2mol of furfural in 13.2g of distilled water to prepare an aqueous solution, add 0.003mol of malonic acid and 0.006mol of cetyltrimethylammonium bromide A mixed solution was obtained, and the resulting mixed solution was gelled in a thermostat at 90° C. for 12 hours to form a nickel-containing gel;

[0037] 2. Dry the prepared nickel-containing gel at 130°C under vacuum for 2 hours, then carbonize at 800°C for 2 hours under the protection of a reducing atmosphere, and then continue to pass in reducing gas to cool down to room temperature to obtain coated carbon gas Ni composite material of gel; the reducing gas is a mixed gas of hydrogen and argon, the content of hydrogen is 5% by volume, and the gas flow rate of the reducing gas is 0.1-10L / min.

[0038] The carbon airgel-based spherical magnetic material prepared in this example is tested by a magnetometer and shows that the saturation magnetic force is 30...

Embodiment 3

[0041] 1. Weigh 0.15mol of nickel sulfate, 0.01mol of phenylenediamine and 0.2mol of formaldehyde solution in 6.8g of distilled water to prepare an aqueous solution, add 0.001mol of citric acid and 0.003mol of polyethylene glycol to obtain a mixed solution, and the resulting mixed solution Gel in a thermostat at 70°C for 24 hours to form a nickel-containing gel;

[0042] 2. Dry the prepared nickel-containing gel at 120°C under vacuum for 2.5 hours, and then carbonize it at 700°C for 2 hours under the protection of a reducing atmosphere, then continue to pass the reducing gas to cool down to room temperature to obtain coated carbon gas condensation Glue Ni composite material; the reducing gas is a mixed gas of hydrogen and helium, the content of hydrogen is 7% by volume, and the gas flow rate of the reducing gas is 0.1-10L / min.

[0043] The carbon airgel-based spherical magnetic material prepared in this example is tested by a magnetometer and shows that: the saturation magneti...

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Abstract

The invention relates to a preparation method of a carbon-aerogel-based spherical anticorrosion magnetic material, wherein nickel salts, aldehydes substances and aromatic amine phenols are taken as raw materials. The method comprises the process of preparing, drying and carbonizing nickel-containing gel, and is characterized in that the gel is prepared in a manner that the nickel salts are added into a solution prepared from the aldehydes substances and aromatic amine phenols substances according to proportion, a catalyst and a dispersant are added for gelation, vacuum drying is performed to form xerogel, and the nickel-containing gel is carbonized in a reducing atmosphere to prepare the carbon-aerogel-based spherical anticorrosion magnetic material. The method disclosed by the invention is easy to implement, short in preparation period and suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a carbon airgel-based spherical corrosion-resistant magnetic material, in particular to a preparation method of a spherical carbon airgel-based magnetic material with strong corrosion resistance and magnetic properties. Background technique [0002] Carbon aerogel is a material with large specific surface, uniform pore size, and corrosion resistance, while nickel is a magnetic metal that can perform directional movement under inherent magnetic and electromagnetic fields, so it is covered with carbon aerogel The magnetic material of nickel metal has strong controllability and adapts to various operating environments. Carbon aerogel-based magnetic materials are developing rapidly and have extremely important application prospects in environmental governance, soil remediation and targeted drugs. [0003] Carbon aerogels are the key to carbon aerogel-based magnetic materials. Factors such as raw materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/12B22F1/02C01B31/02C01B32/05
Inventor 李学良吴以洪肖正辉罗梅陈洁洁
Owner HEFEI UNIV OF TECH
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