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Natural polymer conductive aerogel and preparation method thereof

A natural polymer and aerogel technology, applied in electrical components, cable/conductor manufacturing, conductors, etc., can solve problems such as poor toughness, large pores, and lack of conductivity

Pending Publication Date: 2022-04-19
田金花
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] CN201610605988 discloses modified chitosan / nanocellulose composite airgel and its preparation method and application. First, chitosan is modified with sulfur, and after obtaining modified chitosan, it is compounded with nanocellulose. Preparation of sulfur-containing modified chitosan / nanocellulose composite porous airgel; although the adsorption effect is good, the obtained product does not have electrical conductivity and poor toughness
[0004] However, the conductive aerogels prepared by carbonization of natural polymer aerogels often have relatively large pores, although the porosity is high. Even if electrostatic adsorption is used, the adsorption effect of natural polymer aerogels cannot be fully developed.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of natural polymer conductive airgel, by weight, mainly includes:

[0030] 20 parts of modified nanocellulose wet gel, 3 parts of ammonium bicarbonate solution.

[0031] A kind of preparation method of natural polymer conductive airgel, the preparation method of described natural polymer conductive airgel is:

[0032] (1) Disperse microcrystalline cellulose in formic acid solution with 50 times the mass fraction of microcrystalline cellulose and 5% formic acid solution, ultrasonicate at 20°C and 50kHz for 3h, add distilled water with 100 times the mass of microcrystalline cellulose, and Quickly filter with filter paper to obtain pretreated microcrystalline cellulose; mix 1,2,4-triazole ionic liquid and 2,2,6,6-tetramethylpiperidine oxide at a mass ratio of 10:0.05 Prepare the ionic liquid; mix octamethylcyclotetrasiloxane, acetic anhydride and alumina in a three-necked flask at a mass ratio of 5:1:0.08, heat to 120°C and reflux for 8 hours, cool to 50°C and proc...

Embodiment 2

[0036] A kind of natural polymer conductive airgel, by weight, mainly includes:

[0037] 25 parts of modified nanocellulose wet gel, 5 parts of ammonium bicarbonate solution.

[0038] A kind of preparation method of natural polymer conductive airgel, the preparation method of described natural polymer conductive airgel is:

[0039] (1) Disperse microcrystalline cellulose in a formic acid solution with a mass fraction of 55 times the mass of microcrystalline cellulose and 4% of the formic acid solution, ultrasonicate at 20 ° C and 55 kHz for 4 hours, add distilled water with 150 times the mass of microcrystalline cellulose, and Quickly filter with filter paper to obtain pretreated microcrystalline cellulose; mix 1,2,4-triazole ionic liquid and 2,2,6,6-tetramethylpiperidine oxide at a mass ratio of 10:0.1 Prepare the ionic liquid; mix octamethylcyclotetrasiloxane, acetic anhydride and alumina in a mass ratio of 5:1:0.09 and place in a three-necked flask, heat to 120°C and reflu...

Embodiment 3

[0043] A kind of natural polymer conductive airgel, by weight, mainly includes:

[0044] 30 parts of modified nanocellulose wet gel, 6 parts of ammonium bicarbonate solution.

[0045] A kind of preparation method of natural polymer conductive airgel, the preparation method of described natural polymer conductive airgel is:

[0046] (1) Disperse the microcrystalline cellulose in a 5% formic acid solution with a mass fraction of 60 times the mass of microcrystalline cellulose, ultrasonicate at 20° C. and 60 kHz for 5 hours, add distilled water with 200 times the mass of microcrystalline cellulose, and Quickly filter with filter paper to obtain pretreated microcrystalline cellulose; the ionic liquid of 1,3-dimethyl-3-imidazolium hexafluorophosphate and 2,2,6,6-tetramethylpiperidinium oxide Mix the mass ratio of 10:0.15 to prepare the ionic liquid; mix octamethylcyclotetrasiloxane, acetic anhydride and alumina in the mass ratio of 5:1.5:0.1 and place in a three-necked flask, heat...

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PUM

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Abstract

The invention discloses natural polymer conductive aerogel and a preparation method thereof, and relates to the technical field of conductive aerogel. When the natural polymer conductive aerogel is prepared, firstly, modified nanocellulose is prepared into wet gel, then the wet gel and ammonium bicarbonate are subjected to freeze drying together to prepare aerogel, and finally in the atmosphere of mixed gas of nitrogen and hydrogen, a carbonization process is performed to prepare the natural polymer conductive aerogel. The modified nano cellulose wet gel is formed by wrapping microcrystalline cellulose with an alpha, omega-dihydroxy dimethyl siloxane oligomer long chain and has a three-dimensional network structure; the natural polymer conductive aerogel prepared by the invention not only has good toughness, but also has relatively strong adsorption capacity.

Description

technical field [0001] The invention relates to the technical field of conductive airgel, in particular to a natural polymer conductive airgel and a preparation method thereof. Background technique [0002] Carbon airgel is a new type of porous carbon material. It is a nano-scale porous amorphous material discovered by Pekala et al. in 1989. It is obtained by high-temperature carbonization of airgel. After high-temperature carbonization of organic airgel with low density, low thermal conductivity and network structure, the obtained airgel not only maintains the porous network structure of organic aerogel, but also endows it with excellent electrical conductivity. [0003] CN201610605988 discloses modified chitosan / nanocellulose composite airgel and its preparation method and application. First, chitosan is modified with sulfur, and after obtaining modified chitosan, it is compounded with nanocellulose. Preparation of sulfur-containing modified chitosan / nanocellulose composi...

Claims

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Application Information

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IPC IPC(8): H01B1/06H01B1/04H01B5/00H01B13/00
CPCH01B1/06H01B1/04H01B5/00H01B13/00
Inventor 田金花
Owner 田金花
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