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Biomass nanocellulose/polypyrrole composite aerogel, and preparation method and application thereof

A technology of nanocellulose and composite airgel, which is applied in the direction of airgel preparation, organic material conductor, chemical instrument and method, etc., can solve the problems of limited application, and achieve the advantages of simple operation, good conductivity, and easy control of conditions Effect

Active Publication Date: 2020-08-11
NORTHEAST FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanocellulose airgel is not conductive, which limits its application in the field of electrochemistry

Method used

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  • Biomass nanocellulose/polypyrrole composite aerogel, and preparation method and application thereof
  • Biomass nanocellulose/polypyrrole composite aerogel, and preparation method and application thereof

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preparation example Construction

[0029] The present invention provides a preparation method of the biomass nanocellulose / polypyrrole composite aerogel described in the above scheme, which includes the following steps:

[0030] (1) Prepare the biomass material into an aqueous nanocellulose suspension;

[0031] (2) Injecting an aqueous solution of ammonium persulfate into the nanocellulose aqueous suspension, and letting it stand for 1.5 to 2 hours for solvent replacement to obtain nanocellulose hydrogel;

[0032] (3) Soak the nanocellulose hydrogel in a phytic acid solution of pyrrole, and let it stand for 2-12 hours to obtain a nanocellulose / polypyrrole composite hydrogel;

[0033] (4) freeze-drying the nanocellulose / polypyrrole composite hydrogel to obtain the biomass nanocellulose / polypyrrole composite aerogel.

[0034] The invention prepares the biomass material into an aqueous nano-cellulose suspension. The present invention does not have special requirements for the biomass material, and it is sufficient to use b...

Embodiment 1

[0054] (1) Add 30g of poplar wood powder to 1500g of distilled water, then add 15g of sodium chlorite and 2mL of glacial acetic acid, cover the beaker with plastic wrap, and heat in a constant temperature water bath at 75°C for 1 hour; add sodium chlorite and ice above. The operation of acetic acid and water bath heating was repeated 6 times to clean the sample to neutrality; then put the sample into 800g potassium hydroxide solution with a mass fraction of 5%, and directly heat it in a constant temperature water bath at 90°C for 2h, and wash it to neutrality. Suction and filter excess water to obtain purified cellulose in a hydrated state;

[0055] (2) Prepared from purified cellulose into 0.5wt% aqueous solution;

[0056] (3) The purified cellulose aqueous solution was subjected to ultrasonic treatment with a power of 1200W and a treatment time of 30min, and then continued high-pressure homogenization treatment, the treatment time was 20min, the primary pressure was 40-90bar, and...

Embodiment 2

[0062] (1) Add 30g of poplar wood powder to 1500g of distilled water, then add 15g of sodium chlorite and 2mL of glacial acetic acid, cover the beaker with plastic wrap, and heat in a constant temperature water bath at 75°C for 1 hour; add sodium chlorite and ice above. The operation of acetic acid and water bath heating was repeated 6 times to clean the sample to neutrality; then put the sample into 800g potassium hydroxide solution with a mass fraction of 5%, and directly heat it in a constant temperature water bath at 90°C for 2h, and wash it to neutrality. Suction and filter excess water to obtain purified cellulose in a hydrated state;

[0063] (2) Prepared from purified cellulose into 0.8%wt concentration aqueous solution;

[0064] (3) The purified cellulose aqueous solution was subjected to ultrasonic treatment with a power of 1200W and a treatment time of 30min, and then continued high-pressure homogenization treatment, the treatment time was 20min, the primary pressure was...

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Abstract

The invention provides biomass nanocellulose / polypyrrole composite aerogel, and a preparation method and application thereof, belonging to the technical field of composite aerogel materials. The composite aerogel provided by the invention has a porous network structure, and comprises biomass nanocellulose and polypyrrole coating the surface of the biomass nanocellulose. According to the preparation method, the biomass nanocellulose and the polypyrrole are compounded, and the obtained composite aerogel has the same advantages as both the nanocellulose and the polypyrrole, is light and flexible,has good electrical conductivity, water absorption and heat absorption properties, and is good in environmental stability. The preparation method of the biomass nanocellulose / polypyrrole composite aerogel is simple and convenient to operate, conditions are easy to control, and large-scale production is easy to realize. The invention also provides the application of the biomass nanocellulose / polypyrrole composite aerogel as a conductive material or a water generator.

Description

Technical field [0001] The invention relates to the technical field of composite aerogel materials, in particular to a biomass nano cellulose / polypyrrole composite aerogel, and a preparation method and application thereof. Background technique [0002] As the most abundant natural polymer material in nature, cellulose can be processed into a nano-scale linear high aspect ratio material by means of a chemical-mechanical method, because its material has a nano-scale and main components It is cellulose, for which it is called nanocellulose. Nano-cellulose has good mechanical properties, and its surface is rich in a large number of hydroxyl functional groups, which can self-assemble to form a lightweight, flexible, and network-like aerogel material. However, nanocellulose aerogel is not conductive, which limits its application in the electrochemical field. Summary of the invention [0003] In view of this, the purpose of the present invention is to provide a biomass nanocellulose / po...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L1/02C08L79/04C08G73/06C02F1/14B01J13/00H01B1/12C02F103/08
CPCB01J13/0091C02F1/043C02F1/14C02F2103/08C08G73/0611C08J9/0061C08J9/28C08J2301/02C08J2379/04H01B1/127Y02A20/212
Inventor 陈文帅汪朝晖白璐璐方颖
Owner NORTHEAST FORESTRY UNIVERSITY
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