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Conductive aerogel and preparation method thereof

A technology of airgel and conductive layer, applied in the direction of electrospinning, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems of high preparation conditions, complicated preparation methods, and easy oxidation, so as to improve mechanical properties, The preparation method is simple and the effect of increasing the variety

Active Publication Date: 2016-08-03
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, carbon aerogels include carbon nanotube aerogels, all-carbon aerogels, etc., but most carbon aerogels require a high-temperature carbonization process, the synthesis is complex, the preparation conditions are relatively high, and oxidation is prone to occur in a high-temperature aerobic atmosphere.
Some metal-doped composite aerogels, etc., have problems such as very complicated preparation methods and difficult commercialization.

Method used

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  • Conductive aerogel and preparation method thereof
  • Conductive aerogel and preparation method thereof
  • Conductive aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of conductive airgel, comprising the following steps (flow chart as figure 1 shown):

[0038] 1. Spinning and preparing insulating airgel: said step 1. includes (1) mixing N,N dimethylformamide, polyacrylonitrile (PAN, molecular weight M w=500000) mass ratio 87:13 mixed, magnetic stirrer stirred for 12 hours, was mixed with the electrospinning precursor solution, carried out electrospinning with the electrospinning precursor solution, the spinning voltage was 18 kilovolts, and the spinning receiving distance was 15 centimeters. The polyacrylonitrile micro-nanofiber film is collected on the collector; (2) Homogenization treatment: the polyacrylonitrile micro-nanofiber film obtained by silicon carbide whiskers, step (1), tert-butyl alcohol, and deionized water are mixed according to the mass ratio Mix at a ratio of 1:3:80:320, stir with a high-speed stirrer at 10,000 rpm for 30 minutes to obtain a uniformly dispersed dispersion; (3) freeze-dry the di...

Embodiment 2

[0044] A preparation method of conductive airgel, comprising the following steps:

[0045] 1. spin to prepare insulating airgel: said step 1. includes (1) acetone, N,N dimethylformamide, polyvinylidene fluoride (PVDF, M w =550000), silicon carbide whiskers were mixed according to the mass ratio of 39:39:21:1, stirred by a magnetic stirrer for 24 hours, prepared into an electrospinning precursor solution, and electrospinning was carried out with the electrospinning precursor solution, and the spinning voltage was 15 k V, the spinning receiving distance is 12 centimeters, and the polyvinylidene fluoride micro-nanofiber film is collected on the collecting pole; (2) homogenization treatment: the polyvinylidene fluoride micro-nanofiber film obtained in step (1), tert-butanol 1. Deionized water is mixed in the ratio of mass ratio 1:80:20, with a high-speed stirrer at 10000 rpm, stirred to obtain a uniformly dispersed dispersion for 30 minutes; (3) freezing the dispersion obtained in...

Embodiment 3

[0051] A preparation method of a conductive airgel, which is similar to Example 2, except that silicon carbide is not added to the electrospinning precursor solution prepared in step ①. The content of polyaniline in the resulting conductive airgel is 17wt%, and the conductivity of the conductive airgel is 1.54×10 -5 S / cm.

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Abstract

The invention discloses conductive aerogel and a preparation method thereof. Coaxial composite micro-nanofibers are adopted as fibers for preparing the aerogel, an insulated macromolecular micro-nanofiber prepared through electrostatic spinning serves as the axis of the coaxial composite micro-nanofibers, and the outer surface of the insulated macromolecular micro-nanofiber is coated with a conductive layer through an in-situ polymerization reaction of a conductive polymer material. The conductive aerogel has the good conductivity, the preparation method of the aerogel is simple, has the universality and is suitable for large-scale preparation, and the types of the conductive aerogel can be greatly increased through the preparation method.

Description

technical field [0001] The invention belongs to the technical field of airgel material preparation, and in particular relates to a conductive airgel and a preparation method thereof. Background technique [0002] Aerogel, also known as xerogel, is a nanoporous material with pores filled with a gaseous dispersion medium. Although it has the word "glue" in its name, it is a solid that has been called the lightest solid in the world, and due to its ultra-light mass, airgel is also known as frozen smog. Since it was first prepared in 1931, airgel has attracted widespread attention due to its unique properties such as high porosity, high specific surface area, low density, and low thermal conductivity. , high-efficiency thermal insulation, catalysis and aerospace and other fields have a wide range of applications. As an emerging material, airgel is mainly based on silica aerogel. In recent years, some new airgel materials have been reported abroad, and the preparation of some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/28C08J3/24D01F1/10D01D5/00D04H1/728
CPCC08J3/247C08J9/286C08J9/405C08J2327/16C08J2333/20C08J2367/04D01D5/003D01F1/10D04H1/728
Inventor 龙云泽贾宪生李金涛闫旭楼涛于桂凤贺晓晓
Owner QINGDAO UNIV
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