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CNT:SNC:PEDOT ternary water-based conductive ink and preparation method thereof

A conductive ink, water-based technology, used in inks, household appliances, applications, etc., can solve the problems of high price and easy oxidation, achieve excellent stability and conductivity, improve resource utilization, and improve the effect of sustainable development

Active Publication Date: 2021-02-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, gold powder and silver powder have stable chemical properties and good electrical conductivity, but they are expensive. Copper is cheaper than silver, but it has the disadvantage of being easily oxidized.

Method used

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  • CNT:SNC:PEDOT ternary water-based conductive ink and preparation method thereof
  • CNT:SNC:PEDOT ternary water-based conductive ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 5 g of pine wood pulp into 100 g of DMF solution in which 20 g of sulfamic acid is dissolved, react at 90° C. for 6 hours, separate the pine wood pulp from the reaction solution to obtain sulfated cellulose. The sulfated cellulose was added into water for shear dispersion for 40 minutes to obtain a sulfated nanocellulose aqueous dispersion (SNC aqueous dispersion).

[0041] Add 1.5g of CNT to 100g of SNC aqueous dispersion (1wt%), and make CNT:SNC dispersion by ultrasonic dispersion. Add 1.5g of EDOT monomer into the above CNT:SNC dispersion, stir and disperse for 1h. Then, 3.75 g of ammonium persulfate and 0.15 g of ferric chloride were added, and polymerized for 18 hours under a nitrogen atmosphere, and the polymerization temperature was 35° C. After the reaction is finished, the CNT:SNC:PEDOT ternary water-based conductive ink can be obtained.

Embodiment 2

[0043] Add 1 g of pine pulp into 100 g of DMF solution dissolved with 5 g of sulfamic acid, react at 70° C. for 2 hours, separate the pine pulp from the reaction solution to obtain sulfated cellulose. The sulfated cellulose was added into water for shear dispersion for 20 minutes to obtain a sulfated nanocellulose aqueous dispersion (SNC aqueous dispersion).

[0044]Add 0.5g of CNT into 100g of SNC aqueous dispersion (1wt%), and make CNT:SNC dispersion by ultrasonic dispersion. Add 0.5g of EDOT monomer into the above CNT:SNC dispersion liquid, stir and disperse for 1h. Then add 0.75g of ammonium persulfate and 0.025g of ferric chloride, and polymerize for 6 hours under nitrogen atmosphere, and the polymerization reaction temperature is 20°C. After the reaction is finished, the CNT:SNC:PEDOT ternary water-based conductive ink can be obtained.

Embodiment 3

[0046] Add 3 g of pine wood pulp into 100 g of DMF solution in which 10 g of sulfamic acid is dissolved, react at 80° C. for 4 hours, separate the pine wood pulp from the reaction solution to obtain sulfated cellulose. The sulfated cellulose was added into water for shear dispersion for 30 minutes to obtain a sulfated nanocellulose aqueous dispersion (SNC aqueous dispersion).

[0047] Add 1 g of CNT to 100 g of SNC aqueous dispersion (1 wt%), and make CNT:SNC dispersion by ultrasonic dispersion. Add 1 g of EDOT monomer into the above CNT:SNC dispersion, and stir to disperse for 1 h. Then add 2g of ammonium persulfate and 0.075g of ferric chloride, and polymerize for 12 hours under nitrogen atmosphere, and the polymerization temperature is 25°C. After the reaction is finished, the CNT:SNC:PEDOT ternary water-based conductive ink can be obtained.

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Abstract

The invention discloses a CNT:SNC:PEDOT ternary water-based conductive ink and a preparation method thereof. The method comprises the following steps: adding carbon nanotubes into a sulfated nanocellulose aqueous dispersion, and conducting uniform dispersing to obtain a CNT:SNC dispersion; adding an EDOT monomer into the CNT:SNC dispersion, and conducting uniform stirring to obtain a mixed liquid;and adding ammonium persulfate and ferric chloride into the mixed solution, and carrying out polymerization reaction in an inert atmosphere to obtain the CNT:SNC:PEDOT ternary water-based conductiveink. The CNT:SNC:PEDOT ternary conductive ink has the advantages of being water-based, environment-friendly, good in stability, good in adhesive force, free of heating curing, high in universality andthe like. Meanwhile, due to the advantages of stable dispersion, high conductivity, excellent printing adaptability, excellent coating mechanical stability and the like, the conductive ink provided by the invention is expected to be applied to printing of various flexible electronic devices.

Description

technical field [0001] The invention belongs to the field of conductive ink, and mainly relates to a CNT:SNC:PEDOT ternary water-based conductive ink and a preparation method thereof. Background technique [0002] Conductive ink refers to the ink that is printed on conductive substrates to enable it to conduct current and eliminate the ability to accumulate static charges. It is generally printed on non-conductive substrates such as plastic, glass, ceramics or cardboard. As a key material used in printed electronic technologies such as radio frequency identification technology, flexible printed circuits, sensors, electromagnetic shielding, membrane switches and e-books, conductive ink has attracted widespread attention for its application advantages and research results. Conductive inks are generally composed of conductive fillers, binders, solvents and various auxiliary agents, among which conductive fillers are the key phase of ink conductivity. Conductive fillers include...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/102C09D11/14C09D11/03C09D11/033C08G61/12
CPCC09D11/52C09D11/102C09D11/14C09D11/03C09D11/033C08G61/126C08G2261/11C08G2261/3243
Inventor 祁海松冯晓王熙军党超王明周生辉
Owner SOUTH CHINA UNIV OF TECH
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