Hydrophilic graphene-carbon nano-tube composite super-light elastic aerogel and preparation method thereof

A carbon nanotube composite and carbon nanotube technology, applied in the field of hydrophilic graphene-carbon nanotube composite ultra-light elastic airgel and its preparation, to achieve low elasticity, good hydrophilicity, and simple and convenient preparation process Effect

Active Publication Date: 2015-04-08
ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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  • Description
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  • Hydrophilic graphene-carbon nano-tube composite super-light elastic aerogel and preparation method thereof
  • Hydrophilic graphene-carbon nano-tube composite super-light elastic aerogel and preparation method thereof

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preparation example Construction

[0024] The preparation method of the above-mentioned hydrophilic graphene-carbon nanotube composite ultra-light elastic airgel, the steps are as follows:

[0025] (1) dispersing 1 part by weight of graphene oxide in 10 to 4000 parts by weight of water to form a graphene oxide dispersion;

[0026] (2) Dispersing 1 part by weight of carbon nanotubes in 5 to 4000 parts by weight of the graphene oxide dispersion prepared in step 1 to obtain a graphene oxide-carbon nanotube dispersion;

[0027] (3) adding 1 part by weight of a polymer aqueous solution with a mass fraction of 0.01% to 80% to 0.001 to 4000 parts by weight of a graphene oxide-carbon nanotube dispersion to obtain a three-phase composite dispersion;

[0028] (4) Freeze-dry or supercritically dry the three-phase composite dispersion to obtain hydrophilic graphene oxide-carbon nanotube airgel;

[0029] (5) The hydrophilic graphene oxide-carbon nanotube aerogel is chemically reduced or high-temperature reduced to obtain a...

Embodiment 1

[0037] Step (a): disperse 1 g of graphene oxide in 4000 g of water, and stir for 2 hours to obtain a graphene oxide dispersion;

[0038] Step (b): Disperse 1 g of carboxylated multi-walled carbon nanotubes in 4000 g of the graphene oxide dispersion obtained in step a, and stir for 10 hours to obtain a graphene oxide-multi-walled carbon nanotubes dispersion;

[0039] Step (c): adding 1 g of polyacrylic acid aqueous solution with a mass fraction of 80% to 4000 g of the graphene oxide-multi-walled carbon nanotube dispersion obtained in step b to obtain a three-phase composite dispersion;

[0040] Step (d) freeze-forming the three-phase composite dispersion obtained in step c at -100°C, and freeze-drying to obtain a hydrophilic graphene oxide-carbon nanotube airgel;

[0041] Step (e): The hydrophilic graphene oxide-carbon nanotube airgel obtained in step d was reduced in the reducing agent hydrazine hydrate (0.1% by mass fraction) at 80°C for 24 h, and the hydrophilic graphite was...

Embodiment 2

[0044] Step (a): Dispersing 1 g of graphene oxide in 200 g of water, stirring and dispersing to obtain a graphene oxide dispersion;

[0045] Step (b): dispersing 1 g of double-walled carbon nanotubes in 200 g of the graphene oxide dispersion obtained in step a, stirring and dispersing to obtain a graphene oxide-multi-walled carbon nanotubes dispersion;

[0046] Step (c): adding 1 g of polyvinyl alcohol aqueous solution with a mass fraction of 5% to 200 g of the graphene oxide-multi-walled carbon nanotube dispersion obtained in step b to obtain a three-phase composite dispersion;

[0047] Step (d) freeze-forming the three-phase composite dispersion obtained in step c at -100°C, and freeze-drying to obtain a hydrophilic graphene oxide-carbon nanotube airgel;

[0048] Step (e): The hydrophilic graphene oxide-carbon nanotube airgel obtained in step d was reduced in the reducing agent hydroiodic acid (58% mass fraction) at 80°C for 10 h, and after drying, the hydrophilic Graphene-...

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Abstract

The invention discloses a hydrophilic graphene-carbon nano-tube composite super-light elastic aerogel and a preparation method thereof. The preparation method comprises the following steps: firstly preparing a graphene oxide-carbon nano-tube dispersion liquid; then adding a polymer aqueous solution into the graphene oxide-carbon nano-tube dispersion liquid to obtain a three-phase composite dispersion liquid; and then freeze drying or supercritical drying the three-phase composite dispersion liquid, adopting chemical reduction or high-temperature reduction to obtain the hydrophilic graphene-carbon nano-tube composite super-light elastic aerogel. The hydrophilic graphene-carbon nano-tube composite super-light elastic aerogel and the preparation method are simple in technology and green and environment-friendly in process; the prepared hydrophilic graphene-carbon nano-tube composite super-light elastic aerogel has the advantages of low density, hydrophilicity, high elasticity and the like.

Description

technical field [0001] The invention relates to a hydrophilic graphene-carbon nanotube composite ultra-light elastic airgel and a preparation method thereof. Background technique [0002] Airgel, also known as xerogel, is the complete dry skeleton that remains after removing the solvent in the gel. Aerogels have the characteristics of low density, high porosity, and large specific surface area, and are widely used in aerospace exploration, microwave-absorbing materials, environmental protection, high-efficiency catalysis, and supercapacitors. Since the discovery of ultra-light airgel in the 1930s, the efforts of countless scientists have continuously improved and perfected the composition and performance of airgel. At present, ultra-light porous materials of various materials have been developed, such as silica airgel. , metal porous materials, polymer sponge materials, etc., are becoming more and more widely used. Among them, carbon airgel materials have attracted extensi...

Claims

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Application Information

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IPC IPC(8): C01B31/00
Inventor 高超孙海燕
Owner ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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