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Carbon fiber gel material as well as preparation method and application thereof

A technology for gel materials and fiber materials, which is applied in the fields of fiber chemical characteristics, chemical instruments and methods, rayon manufacturing, etc., can solve the problems of small adsorption capacity, secondary pollution, and no obvious increase in adsorption capacity, and achieves the preparation method. Simple, excellent adsorption performance, fast adsorption rate effect

Inactive Publication Date: 2021-12-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yu Shuhong's research group (Angew.Chem.Int.Ed.2012, 51, 5101-5105) reported that ultra-thin Te nanowires were dispersed in glucose solution and then freeze-dried to obtain carbon nanofiber gels, which were applied in organic solvents In terms of oil adsorption, but compared with traditional adsorption materials, the adsorption capacity of this material has not been significantly improved.
Therefore, traditional adsorption materials still face problems such as small adsorption capacity, non-recyclable use, and easy to cause secondary pollution. For example, the adsorption rate of graphene oxide (GO)-carbon nanotube (CNT) gel to vegetable oil and tetrahydrofuran is about 3000% (Carbon2014,80,523), the adsorption rate of GO sponge to various organic solvents is about 5000% (Adv.Funct.Mater.2012,22,4421)

Method used

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  • Carbon fiber gel material as well as preparation method and application thereof
  • Carbon fiber gel material as well as preparation method and application thereof
  • Carbon fiber gel material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Carbonize the ZIF-8-PAN fiber at 240°C under an inert atmosphere with a heating rate of 3°C / min to obtain an easily dispersible fiber material.

[0033] Step 2: Add 180 mg of the fiber material obtained in Step 1 and 15 mg of GO into a mixed solution of 15 ml of water / tert-butanol (volume ratio 4:1), and stir evenly to obtain a dispersion.

[0034] Step 3, pour the dispersion liquid obtained in step 2 into a mold, freeze in a refrigerator for 12 hours, and then freeze-dry for 48 hours to obtain an airgel;

[0035] Step 4: carbonize the airgel obtained in step 3 at 900° C. under an inert gas with a heating rate of 3° C. / min to obtain a carbon fiber gel material.

[0036] figure 1 XRD pattern for ZIF-8, ZIF-8-PAN, GO, airgel. It can be seen from the figure that the airgel contains ZIF-8 and GO. figure 2 It is the scanning electron microscope picture of the porous carbon fiber gel material, image 3 It is the transmission electron micrograph of the porous carb...

Embodiment 2

[0042] Step 1: Carbonize the ZIF-8-PAN fiber at 230°C under an inert atmosphere with a heating rate of 2°C / min to obtain an easily dispersible fiber material.

[0043] Step 2: Add 165 mg of the fiber material obtained in Step 1 and 15 mg of GO into a mixed solution of 15 ml of water / tert-butanol (volume ratio 4:1), and stir evenly to obtain a dispersion.

[0044] Step 3, pour the dispersion liquid obtained in step 2 into a mold, freeze in a refrigerator for 12 hours, and then freeze-dry for 48 hours to obtain an airgel;

[0045] Step 4: carbonize the airgel obtained in step 3 at 700° C. under an inert gas with a heating rate of 2° C. / min to obtain a carbon fiber gel material. The measured density of the material is about 9.96mg / cm 3 , at room temperature, the adsorption rate of ethanol is 6732%, the adsorption rate of DMF is 9987%, the adsorption rate of n-hexane is 10388%, and the adsorption rate of pump oil is 13832%.

Embodiment 3

[0047] Step 1, under an inert atmosphere, carbonize the ZIF-8-PAN fiber at 250°C with a heating rate of 5°C / min to obtain an easily dispersible fiber material.

[0048] Step 2: Add 195 mg of the fiber material obtained in Step 1 and 30 mg of GO into a mixed solution of 15 ml of water / tert-butanol (volume ratio 4:1), and stir evenly to obtain a dispersion.

[0049] Step 3, pour the dispersion liquid obtained in step 2 into a mold, freeze in a refrigerator for 12 hours, and then freeze-dry for 48 hours to obtain an airgel;

[0050]Step 4: carbonize the airgel obtained in step 3 at 900° C. under an inert gas with a heating rate of 10° C. / min to obtain a carbon fiber gel material. The measured density of the material is about 10.34mg / cm 3 , At room temperature, the adsorption rate of ethanol is 7139%, the adsorption rate of DMF is 10255%, the adsorption rate of n-hexane is 9567%, and the adsorption rate of pump oil is 13521%.

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Abstract

The invention discloses a carbon fiber gel material as well as a preparation method and application thereof. The method comprises the following steps of firstly, pre-activating ZIF-8-PAN fibers to obtain an easy-to-disperse fiber material, then mixing the easy-to-disperse fiber material with graphene oxide to form dispersion liquid, performing freeze-drying to form gel, and finally performing carbonizing to obtain the porous carbon fiber gel material. The carbon fiber gel has a micropore-mesopore-macropore structure, has ultrahigh adsorption capacity for organic solvents and oils, has the pump oil adsorption capacity of 16395%, and can be used as an organic solvent and oil absorption material.

Description

technical field [0001] The invention belongs to the field of adsorption materials, and relates to a carbon fiber gel material, a preparation method, and an application thereof in adsorbing organic solvents and oils. Background technique [0002] With the rapid development of industry and economic growth, the production and consumption of organic solvents and petroleum are increasing, and the problem of leakage during their transportation and use is also becoming more and more serious, posing a major threat to ecosystems and human health. [0003] In recent years, carbon fiber aerogels have been widely used in the fields of catalysis, electrochemistry, and adsorption due to their high specific surface area, ultra-lightweight, and high porosity. Yu Shuhong's research group (Angew.Chem.Int.Ed.2012, 51, 5101-5105) reported that ultra-thin Te nanowires were dispersed in glucose solution and then freeze-dried to obtain carbon nanofiber gels, which were applied in organic solvents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F1/10B01J20/20B01J20/28B01J20/30
CPCD01F9/22D01F1/10B01J20/20B01J20/28047B01J20/28023B01J20/28011
Inventor 李健生张子实王超海齐俊文姚怡媛郭鑫陈珂
Owner NANJING UNIV OF SCI & TECH
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