Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method, product and application of polyaniline-coated cellulose nanocrystalline aerogel

A technology of cellulose and nanocrystals, applied in the field of materials, can solve the problems that supercapacitors cannot be used in wearable devices, the energy storage performance of supercapacitor materials is poor, and the application of supercapacitors is limited, so as to achieve good application prospects and high specific capacitance performance , the effect of low density

Active Publication Date: 2022-08-02
黄奕
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor energy storage performance of cellulose-based aerogel supercapacitor materials limits the application of supercapacitors.
At present, in order to solve the above problems, researchers prepare carbon aerogels after carbonizing cellulose nanocrystals to increase the specific surface area and electrical conductivity of the material, or by compounding conductive nanoparticles (such as graphene, carbon nanotubes, etc.), However, these methods will reduce the flexibility of airgel, so that the final supercapacitor cannot be used in wearable devices.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method, product and application of polyaniline-coated cellulose nanocrystalline aerogel
  • A kind of preparation method, product and application of polyaniline-coated cellulose nanocrystalline aerogel
  • A kind of preparation method, product and application of polyaniline-coated cellulose nanocrystalline aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of polyaniline-coated cellulose nanocrystalline aerogels

[0034] (1) The cellulose nanocrystals with an aspect ratio of 60-100 are uniformly dispersed in the hydrochloric acid with a concentration of 0.5mol / L, then aniline is added, and a mixed solution is obtained after stirring at a speed of 500r / min until the mixing is uniform. The concentration of cellulose nanocrystals in the solution is 1wt%, and the concentration of aniline is 0.5wt%. Continue to stir the mixed solution at a speed of 500r / min and dropwise add hydrochloric acid dissolved with potassium persulfate at the same time. The concentration of hydrochloric acid is 0.5mol / L , after the dropwise addition of the hydrochloric acid dissolved with potassium persulfate is completed, the stirring is stopped, and the reaction is allowed to stand at 0 °C for 12 h to obtain a crude gel product. The crude gel product is first washed with absolute ethanol for 5 times, and then washed with water for 5 times....

Embodiment 2

[0040] Preparation of polyaniline-coated cellulose nanocrystalline aerogels

[0041] (1) The cellulose nanocrystals with an aspect ratio of 60-100 are uniformly dispersed in the hydrochloric acid with a concentration of 0.7 mol / L, then aniline is added, and a mixed solution is obtained after stirring at a speed of 700 r / min until the mixing is uniform. The concentration of cellulose nanocrystals in the solution is 2wt%, the concentration of aniline is 1.5wt%, continue to stir the mixed solution at a speed of 700r / min and dropwise add hydrochloric acid dissolved with potassium persulfate at the same time, the concentration of hydrochloric acid is 0.7mol / L , after the dropwise addition of the hydrochloric acid dissolved with potassium persulfate is completed, stop stirring, stand at -5 °C for 10 hours to obtain a crude gel, wash the crude gel with anhydrous ethanol for 4 times, and then with water for 4 pass through to obtain polyaniline-coated cellulose nanocrystalline gel, whe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
aspect ratioaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method, product and application of a polyaniline-coated cellulose nanocrystalline aerogel, and belongs to the technical field of materials. The method is as follows: (1) preparing polyaniline-coated cellulose nanocrystalline gel by in-situ polymerization; (2) placing the gel prepared in step (1) at -120--50°C for directional freezing The directional growth of ice crystals in the gel is completed, and finally freeze-drying is completed. The aerogel prepared by this method has large specific surface area, high electrical conductivity, low density, high porosity and high specific capacitance, and also has high flexibility and strength. Capacitors have high flexibility and specific capacitance, and have good application prospects in the field of green wearable energy storage. The method is simple and easy to operate, does not require high equipment, and is suitable for enlarged production.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method, product and application of a polyaniline-coated cellulose nanocrystalline aerogel. Background technique [0002] In response to the concept of sustainable development, efficient, green, low-cost, and renewable energy is urgently needed. Supercapacitors are promising energy storage devices with high power density, long cycle life, high stability, and fast charge-discharge performance. However, the poor energy storage properties of cellulose-based aerogel-based supercapacitor materials limit the application of supercapacitors. At present, in order to solve the above problems, researchers carbonized cellulose nanocrystals to prepare carbon aerogels to improve the specific surface area and electrical conductivity of the material, or composite conductive nanoparticles (such as graphene, carbon nanotubes, etc.), But these methods reduce the flexibi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08L79/02C08L1/02H01G11/24H01G11/48
CPCC08J9/28C08J9/0061H01G11/24H01G11/48C08J2205/026C08J2379/02C08J2301/02C08J2201/0484Y02E60/13
Inventor 黄进甘霖李东
Owner 黄奕