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Conductive composition containing poly(3,4-ethylenedioxythiophene)/lignosulfonic acid and preparation method thereof

A technology of ethylenedioxythiophene and lignosulfonic acid, which is applied in the direction of lignin coatings, conductive coatings, coatings, etc., and can solve problems such as shedding, environmental pollution, and restrictions

Active Publication Date: 2014-07-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, adding an inappropriate amount of non-conductive hydroxyaromatic compounds will also lead to a decrease in conductivity
(2) Phase separation problem of dopant polystyrene sulfonic acid
But on the other hand, it also shows that the washing resistance of polystyrene sulfonic acid is poor. When washing with water to make polystyrene sulfonic acid detach, it will inevitably lead to poly(3,4-ethylenedioxythiophene) / polystyrene Partial exfoliation of the composite membrane formed by sulfonic acid
(3) The product is expensive
Although polyaniline and its derivative antistatic agents are cheap, they are restricted due to environmental pollution problems

Method used

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  • Conductive composition containing poly(3,4-ethylenedioxythiophene)/lignosulfonic acid and preparation method thereof
  • Conductive composition containing poly(3,4-ethylenedioxythiophene)/lignosulfonic acid and preparation method thereof
  • Conductive composition containing poly(3,4-ethylenedioxythiophene)/lignosulfonic acid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Step 1: Polymerization process

[0047] Sodium lignosulfonate is firstly dissolved in water to form a 5wt% (mass percent) aqueous solution. The lignin sulfonate solution is classified by an ultrafiltration machine, and components with a molecular weight cutoff greater than 5000 Da are cut off by an ultrafiltration membrane. Concentrate the lignosulfonate ultrafiltrate with a molecular weight greater than 5000Da, and then flow through a cation exchange resin to exchange hydrogen ions and metal ions. Collect the washing solution that has passed through the cation exchange resin, concentrate, and dry to obtain lignosulfonic acid.

[0048] 300 parts by weight of lignosulfonic acid are dissolved in 5000 parts by weight of water to prepare an aqueous solution with a mass concentration of 6.0%. Add 100 parts by weight of the monomer (3,4-ethylenedioxythiophene) to the aqueous ligninsulfonic acid solution at room temperature, and stir for 30 minutes at a stirring speed of 500...

Embodiment 2

[0053] Step 1: Polymerization process

[0054] Dissolve magnesium lignosulfonate in water to prepare a 10 wt% aqueous solution. The lignin sulfonate solution is classified by an ultrafiltration machine, and components with a molecular weight cutoff greater than 5000 Da are cut off by an ultrafiltration membrane. Concentrate the lignosulfonate ultrafiltrate with a molecular weight greater than 5000Da, and then flow through a cation exchange resin to exchange hydrogen ions and metal ions. Collect the washing solution that has passed through the cation exchange resin, concentrate, and dry to obtain lignosulfonic acid.

[0055] 1000 parts by weight of lignosulfonic acid is dissolved in 10000 parts by weight of water to prepare an aqueous solution with a mass concentration of 10.0%. Add 100 parts by weight of the monomer (3,4-ethylenedioxythiophene) into the aqueous ligninsulfonic acid solution at room temperature, and stir for 10 minutes at a stirring speed of 2000 rpm to make t...

Embodiment 3

[0060] Step 1: Polymerization process

[0061] Dissolve magnesium lignosulfonate in water to prepare a 6wt% aqueous solution. The lignin sulfonate solution is classified by an ultrafiltration machine, and components with a molecular weight cutoff greater than 5000 Da are cut off by an ultrafiltration membrane. Concentrate the lignosulfonate ultrafiltrate with a molecular weight greater than 5000Da, and then flow through a cation exchange resin to exchange hydrogen ions and metal ions. Collect the washing solution of the cation exchange resin, concentrate and dry to obtain lignosulfonic acid.

[0062] 500 parts by weight of lignosulfonic acid are dissolved in 5000 parts by weight of water to prepare an aqueous solution with a mass concentration of 10.0%. At room temperature, 100 parts by weight of monomer (3,4-ethylenedioxythiophene) was added to the aqueous ligninsulfonic acid solution, and stirred at a stirring speed of 1000 rpm for 20 minutes to make the mixture uniform. ...

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Abstract

The invention relates to a conductive composition containing poly(3,4-ethylenedioxythiophene) / lignosulfonic acid and a preparation method thereof. The method comprises the following steps of: chemically oxidizing and polymerizing 100 parts by weight of monomer (3,4-ethylenedioxythiophene) and 170-300 parts by weight of an oxidant in 100-1,000 parts by weight of an aqueous solution in which lignosulfonic acid is taken as a carrier; and adding 200-500 parts by weight of a non-aqueous solvent, 10-100 parts by weight of a polyhydroxy aromatic compound and 50-200 parts by weight of a bonding agent to obtain the conductive composition containing poly(3,4-ethylenedioxythiophene) / lignosulfonic acid. A product prepared with the method meets the requirements of low production cost, transparency, high conducting performance, high adhesion and high hardness in an efficient antistatic agent, and has the characteristics of high dispersion stability, heat stability, temperature stability and water washing resistance. The conductive composition has economic and environmental protection effects as well as a good industrial prospect.

Description

technical field [0001] The invention relates to a conductive composition of poly(3,4-ethylenedioxythiophene) / lignosulfonic acid and a preparation method thereof, belonging to the technical field of functional polymer materials. Background technique [0002] After the static electricity generated by the insulator accumulates to a certain extent, electrostatic discharge will occur under suitable conditions, hindering production or reducing product quality, and even causing huge disasters. Therefore, it is very necessary to treat the insulating material with an antistatic agent so that the generated static charge can be eliminated in a peaceful manner. Different materials have different conductive properties, and the surface resistance of insulating materials is between 10 12 Ω / square or more; the surface resistance of semiconductor materials is generally 10 0 ~10 6 Ω / square; the surface resistance of a conductive metal material is 10 -3 ~10 0 Ω / square. The necessary cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/00C08L65/00C08L29/14C08L61/28C08L1/28C08L39/06C08L33/02C08G61/12C08H7/00C09D197/00C09D165/00C09D129/14C09D161/28C09D101/28C09D139/06C09D133/02C09D7/12C09D5/24
Inventor 邱学青邓永红赵大成杨东杰庞煜霞周明松肖亮
Owner SOUTH CHINA UNIV OF TECH
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