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Conductive polymer aerogel and preparation method thereof

A conductive polymer and aerogel technology, applied in the field of aerogel and its preparation, can solve the problems of poor optical transparency and low brittleness, and achieve the effects of low cost, flexible preparation method and simple process

Inactive Publication Date: 2010-10-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic aerogels are less optically transparent than inorganic aerogels, but are less brittle

Method used

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

Examples

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preparation example Construction

[0032] refer to figure 1 , showing a flow chart of an embodiment of a method for preparing a conductive polymer airgel of the present invention, including:

[0033]Step 101, in a neutral or acidic aqueous solution, add (3,4) ethylenedioxythiophene and a polymer polyelectrolyte, perform ultrasonic dispersion or mechanical stirring until a uniform suspension is formed; the suspension exists stably at least 0.5- 24 hours;

[0034] The aqueous solution selected in the embodiment of the present invention can be a neutral aqueous solution or an acidic aqueous solution, wherein the acidic aqueous solution can be prepared with hydrochloric acid, sulfuric acid or phosphoric acid, and the concentration can be 0.05-4.0 mol / liter.

[0035] In a preferred embodiment of the present invention, the polymer polyelectrolyte is selected from: water-soluble polyacrylic acid salt, polystyrene sulfonate, polyaniline sulfonate, poly(2-acrylamido-2-methyl -1-propanesulfonate), water-soluble anionic...

example 1

[0046] Example 1, the synthesis of conductive polymer airgel (drying by freeze-drying)

[0047] Take 150uL (3,4)-ethylenedioxythiophene and add it to the sodium polystyrene sulfonate solution (0.56 g sodium polystyrene sulfonate is dissolved in 9 ml of 1 mol / L hydrochloric acid solution), and ultrasonically disperse to form a suspension (emulsion), then add an oxidizing agent solution (3.6 grams of anhydrous cerium nitrate dissolved in 2 milliliters of deionized water), stir vigorously for 30 seconds, and then stand still for 24 hours to obtain a conductive polymer hydrogel. The obtained hydrogel was replaced with 20 liters of deionized water 10 times to remove impurities. Then directional freezing was used to immerse it in a liquid nitrogen solution at a speed of 5 mm / s. After the freezing was complete, it was vacuum-dried to maintain a vacuum of 60 Pa and a temperature of 30 degrees Celsius. After 24 hours, the conductive polymer airgel was obtained. figure 2 (a) is a sca...

example 2

[0049] Example two, the synthesis of conductive polymer airgel (using supercritical drying method)

[0050] Mix 78 μl of (3,4)-ethylenedioxythiophene with sodium polyaniline sulfonate solution (0.151 g of sodium polyaniline sulfonate dissolved in 7.5 ml of deionized water), and stir mechanically for 4 hours to form a suspension (emulsion ), then add an oxidant solution (7.38 grams of ferric nitrate nonahydrate dissolved in 5 milliliters of deionized water), stir vigorously for 1 minute, and then stand at 40 degrees for 12 hours to form a conductive polymer hydrogel. The obtained conductive polymer hydrogel was replaced with 10 liters of deionized water for 5 times in total, and then replaced with 10 liters of ethanol solution for 5 times to obtain the conductive polymer hydrogel. The obtained alcohol gel is dried by supercritical CO2 for 24 hours to obtain the aerogel of conductive polymer. image 3 (a) is a digital photo of the prepared conductive polymer airgel; image 3 (...

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Abstract

The invention provides a conductive polymer aerogel and a preparation method thereof, wherein the conductive polymer aerogel is an organic conductive aerogel taking an intrinsic conductive polymer polyelectrolyte dopant as a three-dimensional network structural material, and the intrinsic conductive polymer adopted by the conductive polymer aerogel is poly (3,4) ethylenedioxythiophene; the doped polyelectrolyte is chosen from one or the mixture of more than one of water-soluble polyacrylate, polystyrene sulfonate, polyaniline sulfonate, poly (2-acrylamido-2-methyl-1-propanesulfonic acid salt), water-soluble anionic poly (3,4) ethylenedioxythiophene and the like. The conductive polymer aerogel has the aperture of 1 nm-5 mu m, the porosity of 75.0-99.5%, the density of 0.05-0.5g / cm3, the specific surface area of 100-1000 m2 / g and the electrical conductivity of 10-5 to 102 s / cm.

Description

technical field [0001] The invention relates to an airgel and a preparation method thereof, in particular to a conductive polymer airgel and a preparation method thereof. Background technique [0002] Conductive polymers are a unique class of organic materials that exhibit the electrical and optical properties of metals or semiconductors. In addition to the properties of metals (high conductivity) and semiconductors, conductive polymers also retain the structural diversity, processability and light specific gravity of polymers. Some simple conductive polymer materials, such as polyaniline, polypyrrole, and polythiophene, can be prepared in large quantities by chemical oxidation, and can also be formed into films by electrochemical methods. Due to the special structure and excellent physical and chemical properties of conductive polymers, it has attractive application prospects in energy, light, electronic devices, etc., and some of them have moved towards practical applicat...

Claims

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Application Information

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IPC IPC(8): C08L65/00C08L33/02C08L25/06C08L79/02C08L33/24C08G61/12C08J3/075
Inventor 张学同刘吉仁李春燕罗运军
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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