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Preparation method of biomass nano cellulose carbon aerogel

A nanocellulose and carbon aerogel technology is applied in the field of carbon aerogel preparation, which can solve the problems of lack of raw materials and complicated preparation process, and achieve the effects of good conductivity, low density and rich source of raw materials.

Inactive Publication Date: 2015-05-13
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the preparation process of traditional carbon aerogel is relatively complicated and the raw materials are scarce, and provides a preparation method of biomass nanocellulose carbon aerogel

Method used

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  • Preparation method of biomass nano cellulose carbon aerogel
  • Preparation method of biomass nano cellulose carbon aerogel
  • Preparation method of biomass nano cellulose carbon aerogel

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specific Embodiment approach 1

[0019] Specific embodiment one: the preparation method of biomass nanocellulose carbon airgel in this embodiment is carried out according to the following steps:

[0020] 1. Biomass material treatment: treat the biomass material with acidified sodium chlorite, and then use a potassium hydroxide solution with a concentration of 1% to 10% by mass to obtain purified cellulose;

[0021] 2. Prepare purified cellulose aqueous solutions with different concentrations;

[0022] 3. Mechanical treatment: The purified cellulose aqueous solution is subjected to ultrasonic treatment, the working power is 800-1200w, the ultrasonic treatment time is 10-60min, and then the high-pressure homogenization treatment is continued, the treatment time is 5-60min, and the primary pressure is 40-60min. 90bar, and the secondary pressure is 300-450bar to obtain a nanocellulose aqueous suspension, and the nanocellulose aqueous suspension is allowed to stand for 5-10 hours, and then the nanocellulose hydrog...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that the biomass material in Step 1 is wood powder or crop processing residue powder, and is sieved with a 60-mesh sieve before use. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step one, the specific steps of treating the biomass material with acidified sodium chlorite are:

[0029] Add the biomass material to distilled water, then add sodium chlorite and glacial acetic acid, seal the container, heat it in a constant temperature water bath at 75°C for 0.5-1.5 hours, then continue to add sodium chlorite and glacial acetic acid, and seal the container. Heat in a constant temperature water bath at 75°C for 0.5-1.5h, repeat this 5 times, and then wash the sample until neutral. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a carbon aerogel, particularly a preparation method of a biomass nano cellulose carbon aerogel, and aims to solve the problems of complex preparation process and lack of raw materials in the traditional carbon aerogel. The method comprises the following steps: 1. treatment of biomass material: treating the biomass material with acidified sodium chlorite, and treating with a 1-10 wt% potassium hydroxide solution to obtain purified cellulose; 2. preparing purified cellulose water solutions with different concentrations; 3. mechanical treatment: carrying out ultrasonic treatment on the purified cellulose water solution, carrying out high-pressure homogenization treatment to obtain a nano cellulose water suspension, and standing the nano cellulose water suspension to obtain the nano cellulose aquagel by self-assembly; 4. drying the nano cellulose aquagel to prepare the nano cellulose aerogel; and 5. carrying out carbonizing treatment on the nano cellulose aerogel in a pipe furnace in an inert gas protective atmosphere to prepare the nano cellulose carbon aerogel. The method is applicable to the field of aerogel materials.

Description

technical field [0001] The invention relates to a preparation method of carbon airgel. Background technique [0002] Carbon airgel is an ultra-light carbon material with a three-dimensional network entanglement structure. It is the lightest material among existing solid materials, and its density can be as low as 4-6 mg / cm 3 And below, the porosity is as high as 90% to 98%. Carbon airgel materials have been applied in many fields due to their unique structure and performance characteristics. For example: resorcinol-formaldehyde carbon aerogels are used in electrochemical materials (such as supercapacitors, battery electrodes), catalyst supports (such as supported metal catalysts), water pollution, hydrogen storage materials and other fields. [0003] Seeking economical, applicable and abundant precursor materials and using environmentally friendly treatment methods to prepare carbon aerogels has received extensive attention in the field of materials chemistry. At present,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 陈文帅张奇于海鹏李勍刘一星
Owner NORTHEAST FORESTRY UNIVERSITY
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