PEDOT/graphene/gold nano particle ink and preparation method thereof

A technology of gold nanoparticles and graphene, applied in the field of sensors, can solve problems such as the reduction of graphene's electrical conductivity

Inactive Publication Date: 2019-05-31
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing graphene conductive ink is easy to stack and form graphite layers when graphene oxide is reduced, which reduces the conductivity of graphene to a c...

Method used

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  • PEDOT/graphene/gold nano particle ink and preparation method thereof
  • PEDOT/graphene/gold nano particle ink and preparation method thereof
  • PEDOT/graphene/gold nano particle ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 100ml of uniformly dispersed 1mg / ml GO water dispersion into the flask, adjust the pH value to 3-4 with 1M hydrochloric acid, add 100mg of monomer EDOT, and disperse under 300W low-temperature ultrasonic until the liquid surface is free of oil droplet. Under the conditions of 350rpm mechanical stirring and nitrogen protection, the temperature was raised to 37°C, and 239.6mg of oxidant APS and 0.476mg of Fe were added 2 (SO 4 ) 3 Aqueous solution, after the reaction is completed, obtain PEDOT:rGO solid powder by dialysis and freeze-drying;

[0026] (2) Weigh 100 mg of PEDOT: rGO powder was dispersed in 100 mg of deionized water and added into a three-necked flask, then mechanically stirred at room temperature, followed by adding 100 mg of EDC (dissolved in 10 g of water), 100 mg of NHS (dissolved in 10 g of water) and 200 mg of polyethylene Amine (PEI), the reaction ends after 12h. The reaction product was washed and filtered through a 220 μm microporous memb...

Embodiment 2

[0030] (1) Add 100ml of uniformly dispersed 1mg / ml GO water dispersion into the flask, adjust the pH value to 3-4 with 1M hydrochloric acid, add 200mg of monomer EDOT, and disperse under 300W low-temperature ultrasonic until the liquid surface is free of oil droplet. Under the conditions of 350rpm mechanical stirring and nitrogen protection, the temperature was raised to 37°C, and 479.2mg of oxidant APS and 0.952mg of Fe were added 2 (SO 4 ) 3 Aqueous solution, after the reaction is completed, obtain PEDOT:rGO solid powder by dialysis and freeze-drying;

[0031] (2) Weigh 100 mg of PEDOT: rGO powder was dispersed in 100 mg of deionized water and added into a three-necked flask, then mechanically stirred at room temperature, followed by adding 100 mg of EDC (dissolved in 10 g of water), 100 mg of NHS (dissolved in 10 g of water) and 200 mg of polyethylene Amine (PEI), the reaction ends after 12h. The reaction product was washed and filtered through a 220 μm microporous memb...

Embodiment 3

[0035] (1) Add 100ml of uniformly dispersed 1mg / ml GO aqueous dispersion into the flask, adjust the pH value to 3-4 with 1M hydrochloric acid, add 300mg of monomer EDOT, and disperse under 300W low-temperature ultrasonic until the liquid surface is free of oil droplet. Under the conditions of 350rpm mechanical stirring and nitrogen protection, the temperature was raised to 37°C, and 721.1mg of oxidant APS and 1.428mg of Fe were added 2 (SO 4 ) 3 Aqueous solution, after the reaction is completed, obtain PEDOT:rGO solid powder by dialysis and freeze-drying;

[0036] (2) Weigh 100 mg of PEDOT: rGO powder was dispersed in 100 mg of deionized water and added into a three-necked flask, then mechanically stirred at room temperature, followed by adding 100 mg of EDC (dissolved in 10 g of water), 100 mg of NHS (dissolved in 10 g of water) and 200 mg of polyethylene Amine (PEI), the reaction ends after 12h. The reaction product was washed and filtered through a 220 μm microporous me...

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Abstract

The invention discloses a preparation method of a conductive inductive ink. The preparation method comprises following steps: (1) taking graphene oxide (GO) as a hard template, carrying out in-situ polymerization with EDOT on the surface of GO to obtain a poly(3,4-ethylenedioxythiophene): graphene (PEDOT: rGO) composite material, and then reacting the composite material with polyethyleneimine (PEI) and gold nano particles (Au NPs) to obtain PEDOT: rGO-PEI/Au NPs aqueous dispersion; and (2) preparing a PEDOT: rGO-PEI/Au NPs ink, spraying the ink on the surface of an hydrophilic modified PET substrate in an ink jet printing mode to form a specific pattern, and carrying out assembly to obtain a PET based PEDOT: rGO-PEI/Au NPs sensor device, which can be used to detect humidity and gas. PEDOT:rGO is modified by an amino containing hydrophilic polymer such as PEI, and the water dispersion property and gold nano particle stability of PEDOT: rGO are further enhanced. A sensor prepared by theprovided composite ink has the advantages of high light transmittance, good stability, and wide humidity response range.

Description

technical field [0001] The invention relates to the sensor field of PEDOT conductive ink, in particular to the modification of graphene oxide (GO) and the preparation method of PEDOT / graphene / gold nano particle ink. Background technique [0002] Graphene is a two-dimensional carbon material that is closely packed with carbon atoms. The thickness of a single layer of graphene is only 0.35nm. Lightweight, ultra-high strength, high electrical and thermal conductivity and light transmittance, stable structure and high specific surface area (2600m2 / g). However, the existing graphene conductive ink is easy to stack and form graphite layers when graphene oxide is reduced, which reduces the conductivity of graphene to a certain extent. People often introduce conductive nanoparticles into the composite system by physical doping. , improve the electrical performance and sensitivity of the sensor. [0003] PEDOT is a polythiophene derivative obtained by the polymerization of the mono...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/30C09D11/38
Inventor 袁妍张荣金董延茂
Owner SUZHOU UNIV OF SCI & TECH
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