Unlock instant, AI-driven research and patent intelligence for your innovation.

Graphene conductive paste with surface adsorption dispersant, its preparation method and application

A surface adsorption, conductive paste technology, applied in the fields of nanotechnology and microelectronics, can solve the problems of easy and irreversible stacking, poor dispersion, etc., and achieve the effects of low cost, long life and good electrical conductivity

Active Publication Date: 2017-02-22
苏州格瑞丰纳米科技有限公司
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcomings of graphene, such as easy irreversible stacking and poor dispersion during processing, limit the excellent performance of graphene in conductive pastes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Graphene conductive paste with surface adsorption dispersant, its preparation method and application
  • Graphene conductive paste with surface adsorption dispersant, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 100g graphene powder (the average size is less than 20um, the thickness is 1-30 layers, and the conductivity is not less than 10 5 S / m) and 100g carbon black in ethanol ultrasonic 1h, dry after mixing uniformly to obtain the graphene powder (such as surface adsorption carbon black) figure 2 ). The powder was mixed with 300g ethyl cellulose, 3000g terpineol, and 1000g 10nm silver powder through a vacuum mixer for 3 hours until the slurry was uniform, and then ground for 5 hours by a three-roll machine to obtain a conductive paste with a maximum graphene size of 2 μm. The slurry has a viscosity of 500-3000mPas and a sheet resistance of 10Ω / sq after film formation, and can be used as a conductive ink for printing circuits.

Embodiment 2

[0037] Get 1g graphene powder (with embodiment 1) and 1g carbon black ultrasonic 1h in ethanol, dry after mixing uniformly and obtain the graphene powder of surface adsorption carbon black, this powder is mixed with 3g ethyl cellulose, 30g Terpineol, 30g 10nm silver powder, 2g glass powder, 0.5gTiO 2 , leveling agent BYK-161 0.1g, stirred by a vacuum mixer for 3 hours until the slurry is uniform, and ground by a three-roll machine for 5 hours to obtain a conductive paste, which can be used for the front electrode of a solar cell by screen printing. powerful. The viscosity of the slurry is 1000-3000mPas, and the sheet resistance after film formation is 0.5Ω / sq.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
electrical conductivityaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a graphene conductive paste with a surface-adsorbed dispersant, a preparation method and application thereof. The conductive paste includes the following components (wt%): 1-10% of graphene adsorbed on the surface of dispersant, 20-50% of conductive filler, 40-70% of solvent, 5-15% of organic binder, and 0% of auxiliary filler. ~10%, functional additive 0~3%; its preparation method includes: mixing graphene powder with dispersant to form graphene powder with surface adsorption dispersant, and then mixing with solvent and organic binder under heating into an organic vehicle in a uniform state, and then uniformly disperse conductive fillers and the like in the organic vehicle to obtain the conductive paste. Compared with the traditional conductive paste, the conductive paste of the present invention has the advantages of improved conductivity, increased life, reduced weight, and high adhesion. At the same time, the preparation method is simple and the cost is low. It can be used in solar cells, LEDs, RFID, antistatic, printed circuits, It has important application prospects in electromagnetic shielding and other directions.

Description

technical field [0001] The invention relates to a conductive slurry, in particular to a graphene conductive slurry with a surface-adsorbed dispersant and a preparation method and application thereof, belonging to the fields of nanotechnology and microelectronics. Background technique [0002] In recent years, conductive paste, as a basic electronic material with specific functions, has been widely used in electronic circuit fields such as printed circuit boards, solar cells, LEDs, RFID radio frequency antennas, touch screen circuits, and flexible printed circuits (FPC). Graphene is a two-dimensional carbon nanostructure material composed of single-layer graphite sheets. Graphene has excellent mechanical, electrical and thermal properties. In particular, the mobility of graphene can reach 2×10 4 cm 2 / V×s is 100 times that of silicon, and the resistivity of graphene at room temperature can reach 10 8 S / m, tolerable is 10 8 A / cm 2 The current is 100 times that of copper. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/18H01B1/24H01B13/00
Inventor 刘立伟李伟伟李奇陈明亮郭玉芬邱胜强刘朝军
Owner 苏州格瑞丰纳米科技有限公司