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Polyaniline functionalized graphene conductive ink and preparation method thereof

A kind of conductive ink and polyaniline technology, which is applied in the direction of ink, household appliances, application, etc., can solve the problem of poor ink conductivity, etc., and achieve the effect of improving the conductivity.

Active Publication Date: 2020-05-08
GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most surfactants are insulating materials, and the existence of a large amount of surfactants in conductive inks will cause the problem of poor conductivity of inks.

Method used

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  • Polyaniline functionalized graphene conductive ink and preparation method thereof
  • Polyaniline functionalized graphene conductive ink and preparation method thereof
  • Polyaniline functionalized graphene conductive ink and preparation method thereof

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Experimental program
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preparation example Construction

[0030] see figure 1 , which is a flow chart of the polyaniline functionalized graphene conductive ink preparation method of the present invention, the method may further comprise the steps:

[0031] (1) Preparation of graphene oxide

[0032] Methods for preparing graphene include Hummers method, Brodie method, Staudenmaier method and improved Hummers method. Both use graphite or graphene as the raw material for preparation. Although the Brodie method and the Staudenmaier method have a high degree of oxidation, the oxidant potassium chlorate (KClO 3 ), Fuming HNO 3 There are unsafe factors in the reaction process, and ClO will also be produced 2 , NO 2 , N 2 o 4 and other harmful gases. The Hummers method and the improved Hummers method have a short reaction time and high safety, so these two methods are often used to prepare graphene oxide. In this embodiment, the improved Hummers method is preferred to prepare graphene oxide.

[0033] Specifically, the steps for pre...

Embodiment 1

[0052] (1) Preparation of graphene oxide

[0053] First, weigh 2.5g of potassium persulfate and 2.5g of phosphorus pentoxide and add it to 18mL of concentrated sulfuric acid at 80°C, stir evenly, then add 3g of graphite powder, react for 4.5 hours to obtain pre-oxidized graphite, and filter the obtained pre-oxidized graphite Wash and dry overnight. Then, add 1g of sodium nitrate and 1g of pre-oxidized graphite to 60mL of concentrated sulfuric acid in an ice-water bath, stir evenly, slowly add 6g of potassium permanganate, stir for 15 minutes, increase the temperature to 35°C and react for 2 hours. After the reaction was completed, 120 mL of deionized water was slowly added to the reaction liquid, stirred at 80° C. for 30 minutes, and then 365 mL of deionized water and 10 mL of 30% hydrogen peroxide were added in sequence to obtain a khaki mixed liquid. Finally, the mixed solution was washed three times with a 1:10 HCl solution, and then washed with deionized water until neutr...

Embodiment 2

[0066] Step (1), step (2), step (4) and step (5) in this embodiment are completely the same as those in Embodiment 1, and will not be repeated here. The difference between the preparation method of the polyaniline functionalized graphene conductive ink of this embodiment and embodiment 1 is as follows:

[0067] (3) Preparation of polyaniline functionalized graphene

[0068] Step 3-1: Dissolve 100 mg of sulfonated polyaniline prepared in step (2) in 20 mL of 5 mg / mL graphene oxide dispersion prepared in step (1), and react ultrasonically for 1 hour to obtain polyaniline oxide Graphene dispersion;

[0069] Step 3-2: Add 1 g of ascorbic acid to the polyaniline graphene oxide dispersion prepared in step 3-1, reflux at 60° C. for 8 hours, obtain a polyaniline-functionalized graphene dispersion after the reflux reaction, and functionalize the polyaniline After the graphene dispersion is washed and freeze-dried, the polyaniline functionalized graphene solid is obtained.

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Abstract

The invention discloses polyaniline functionalized graphene conductive ink and a preparation method thereof, wherein a polyaniline functionalized graphene material is prepared by carrying out ultrasonic treatment on sulfonated polyaniline and graphene oxide dispersion liquid and then carrying out in-situ reduction; according to the preparation method, a graphene composite material which can be stably dispersed in water is obtained by utilizing pi-pi interaction between polyaniline and graphene and sulfonic acid groups on polyaniline, so that the problem that a graphene lamellar structure is easy to agglomerate is solved. According to the conductive ink, polyaniline functionalized graphene and conductive carbon black are used as conductive fillers, water-based resin is used as a binder, anda mixture of water and low-carbon alcohol is used as a solvent to form a point-surface contact conductive network, so that the conductivity of the conductive ink is improved, and the conductive ink is green, environment-friendly and friendly to environment. Furthermore, after the conductive ink is formed into a film, a conductive film with high conductivity, uniform film formation and strong bending resistance can be obtained, the conductivity is as high as 6.61 S / cm, and the conductive ink is expected to be applied to the field of flexible electronic circuit printing.

Description

technical field [0001] The invention relates to the application field of graphene composite materials, in particular to a polyaniline functionalized graphene conductive ink and a preparation method thereof. The polyaniline functionalized graphene conductive ink is suitable for printing and electronic technical fields. Background technique [0002] Conductive ink is a functional ink composed of conductive fillers, solvents, binders and various additives. It is widely used in the fields of radio frequency identification, printed circuit boards, electronic screen displays, solar cells and membrane switches. . Conductive filler is a key component of conductive ink, which determines the conductivity of the ink. The conductive inks widely used at present often use metal particles such as nano-gold, silver, copper, etc. as conductive fillers, and form a conductive network through point-to-point contact between metal particles to achieve conductivity. In the preparation process of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/107C09D11/102C09D11/03C09D11/033
CPCC09D11/52C09D11/107C09D11/102C09D11/03C09D11/033
Inventor 赵军明杨麟杜富滢李茂东尹宗杰刘娟
Owner GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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