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Preparation method for cationic aqueous polyurethane/polypyrrole conductive composite

A technology of conductive composite materials and water-based polyurethane, which is applied in the field of preparation of cationic water-based polyurethane/polypyrrole conductive composite materials, can solve the problems of not being suitable for large-scale production, limited electrode area of ​​conductive material yield, etc., and achieve easy product quality Control, excellent water dispersibility, and stable production process

Inactive Publication Date: 2013-04-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can produce high-purity polypyrrole thin film materials, and can adjust the performance of the conductive compound by changing the electrolysis conditions; but it is not suitable for large-scale production, and the yield of the prepared conductive material is severely limited by the area of ​​the electrode.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) First, add 12 parts of polymer polyol to the drying reactor in parts by mass, degas it in vacuum at 110°C for 1~2 hours, and then pass nitrogen to cool down to 60°C;

[0027] 2) Next, add 5 parts of organic solvent and 5 parts of isocyanate monomer into the reactor under stirring, keep the reaction at 60°C for 1 hour, add 2 parts of cationic hydrophilic chain extender, and adjust the temperature of the system to 50°C, and keep the reaction at 50°C for 4 hours, then cool the system temperature to 20°C;

[0028] 3) Then, add 2 parts of acid salt-forming agent and 40 parts of water into the reactor, stir and disperse for 0.5 hours, adjust the temperature of the system to 0°C, add 5 parts of oxidant aqueous solution into the system, and use acid solution to dissolve The pH value of the system was adjusted to 1;

[0029] 4) Finally, add 1 part of pyrrole that has been subjected to vacuum distillation, and continue the heat preservation reaction for 3 hours to obtain a ca...

Embodiment 2

[0038] 1) First, add 25 parts of polymer polyol to the dry reactor in parts by mass, degas it in vacuum at 115°C for 1~2 hours, and then pass in nitrogen to cool down to 60°C;

[0039] 2) Next, add 10 parts of organic solvent and 8 parts of isocyanate monomer into the reactor under stirring, keep the reaction at 60°C for 2 hours, add 3 parts of cationic hydrophilic chain extender, and adjust the temperature of the system to 70°C, and keep the reaction at 70°C for 2 hours, then cool the system temperature to 30°C;

[0040] 3) Then, add 5 parts of acid salt-forming agent and 140 parts of water into the reactor, stir and disperse for 0.5 hours, adjust the temperature of the system to 60°C, add 10 parts of aqueous solution of oxidant to the system, and use acid solution to dissolve The pH value of the system was adjusted to 3;

[0041] 4) Finally, add 3 parts of pyrrole that has been subjected to vacuum distillation, and continue the heat preservation reaction for 1 hour to obtai...

Embodiment 3

[0050] 1) First, add 30 parts of polymer polyol to the drying reactor in parts by mass, degas it in vacuum at 112°C for 1~2 hours, and then pass nitrogen to cool down to 60°C;

[0051] 2) Next, add 20 parts of organic solvents and 20 parts of isocyanate monomers into the reactor under stirring, keep the reaction at 60°C for 3 hours, add 5 parts of cationic hydrophilic chain extender, and adjust the temperature of the system to 65°C, and keep the reaction at 65°C for 3 hours, then cool the system temperature to 40°C;

[0052] 3) Then, add 8 parts of acid salt-forming agent and 360 parts of water into the reactor, stir and disperse for 0.5 hours, adjust the temperature of the system to 10°C, add 15 parts of aqueous solution of oxidant to the system, and use acid solution to dissolve The pH value of the system was adjusted to 1.5;

[0053] 4) Finally, add 4 parts of pyrrole that has been subjected to vacuum distillation, and continue the heat preservation reaction for 1 hour to ...

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Abstract

The invention discloses a preparation method for a cationic aqueous polyurethane / polypyrrole conductive composite. According to the invention, aqueous polyurethane emulsion is used as a substrate, and a series of aqueous conductive materials are prepared by using an in-situ chemical oxidative polymerization process. The preparation method comprises the following steps: with isocyanate, polymer polyol and a cationic chain extender as raw materials, carrying out polymerization, cooling, neutralization and water dispersion so as to prepare a cationic aqueous polyurethane dispersion; and then with the aqueous polyurethane as the substrate, subjecting the conductive materials to in-situ chemical oxidative polymerization on the surface of substrate micelle under the action of an oxidant so as to prepare the cationic aqueous polyurethane / polypyrrole conductive composite. With the method provided by the invention, functionalization of conduction of the aqueous polyurethane dispersion and environment-friendliness are realized, and the prepared composite has stable conductivity and high conductance. The prepared composite has a nanometer particle size and excellent performance; through adjustment of a formula, the composite can be used both in conductive materials and in fields like anti-static materials.

Description

technical field [0001] The invention relates to a preparation method of a conductive composite material, in particular to a preparation method of a cationic waterborne polyurethane / polypyrrole conductive composite material. Background technique [0002] Since the 20th century, with the rapid development of the polyurethane industry, the application of polyurethane materials has become more and more extensive and in-depth. In some special fields, it needs to be functionalized so that it has one or more special functions (such as conductivity , degradability, etc.). The polyurethane / polypyrrole composite conductive material not only has excellent properties such as the wear resistance and toughness of the polyurethane material, but also has the conductivity of the polypyrrole material. It has shown potential advantages and application prospects in many fields such as antistatic materials, electromagnetic shielding, energy storage equipment, sensors, etc. [0003] The prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/04C08L75/08C08L79/04C08G18/83C08G18/66C08G18/65C08G73/06
Inventor 王海花胡锦娟沈一丁费贵强牟静
Owner SHAANXI UNIV OF SCI & TECH
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