General electronic paste based on graphene filler

A general-purpose electronics and graphene technology, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of poor conductivity of aluminum powder and achieve the effects of improving conductivity, reducing usage, and excellent mechanical properties

Active Publication Date: 2011-11-23
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductivity of aluminum powder is relatively poor, so it needs a relatively large amount as a conductive filler

Method used

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  • General electronic paste based on graphene filler
  • General electronic paste based on graphene filler
  • General electronic paste based on graphene filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Graphene / Acrylic Conductive Coatings

[0052] Step 1: Weigh 1ml of silane coupling agent (KH-570, γ-(methacryloyloxy)propyltrimethoxysilane) into 30ml of deionized water, and at the same time add 1ml of methanol for hydrolysis for 30min. The role of methanol is to inhibit the cross-linking of silanols and shorten the time required to reach hydrolysis equilibrium. Then, 0.61 g of graphene was added into the solution of the silane coupling agent, stirred and reacted for 3 hours, and dried by filtration.

[0053] Second step, choose methyl methacrylate as organic carrier, the solubility parameter δ of this resin r 9.2~9.4cal 1 / 2 cm -3 / 2 ; According to the principle that the solubility parameters are close, acetone is selected as the solvent (δ r =9.8cal 1 / 2 m -3 / 2 ), 60g of methyl methacrylate was added to 20ml of acetone, and mechanically stirred for 4 hours to prepare a methyl methacrylate solution.

[0054] Step 3: Weigh 1g of organic bentonite 801-D, and dispers...

Embodiment 2

[0059] Graphene / Ni / Acrylic Resin Conductive Coatings

[0060] The preparation method is basically the same as in Example 1, except that the mixture of graphene and nickel powder is used as the conductive filler. Wherein when the mass ratio of graphene to nickel powder is 2:48, the prepared conductive coating has good dispersibility, thereby overcoming the problem of coating failure caused by the sedimentation of nickel powder. The properties of the conductive coating prepared in this example are shown in Table 1.

Embodiment 3-10

[0062] Using the same preparation method as in Example 2, a conductive paint was prepared, and the raw materials and properties of the conductive paint are shown in Table 1.

[0063] The conductive coatings prepared in Examples 1-10 were tested for conductivity, adhesion and hardness on the ABS board, and the results are shown in Table 1.

[0064] Among them, the adhesion is measured according to GB / T 9286-88 (cross-cut test of lacquer box and varnish film), and the classification is defined as: 0) the cutting edge is completely smooth, and no grid falls off; 1) there is a little coating at the intersection of the cut. The layer is peeled off, but the cross-cut area is not affected significantly more than 5%; 2) There is coating peeling off at the intersection of the cut and / or along the edge of the cut, and the affected cross-cut area is obviously greater than 5%, but not significantly greater than 15%; 3) The coating is partly or completely peeled off in large fragments alon...

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Abstract

The invention discloses general electronic paste based on graphene filler. The electronic paste contains graphene-containing conductive filler, an organic carrier, a solvent and an auxiliary agent. Because the graphene has good electronic conductivity and a unique two-dimensional laminar nano structure, the graphene forms a conductive network in the organic carrier more easily, and the electric conductivity of the electronic paste is improved by adding the graphene. Further, the conductive filler also contains a conductive material with relatively high electric conductivity, so that the electric conductivity of the electronic paste is further improved. Because the graphene and the conductive material are compounded to form the conductive filler, the electronic paste has good electric conductivity. The electronic paste can obtain a relatively wide electric conductivity range by changing the category of the conductive material mixed with the graphene and adjusting the relative proportion of the graphene to the conductive material of different category. The electric conductivity of the electronic paste is 1*10<-3>S / cm to 1*10<3>S / cm. The paste can be widely applied, and can be particularly used as a conductive coating or adhesive.

Description

technical field [0001] The invention relates to the field of electronic paste, in particular to a general electronic paste containing graphene conductive filler. The high conductivity of the slurry and the wide range of conductivity available make the slurry applicable to conductive coatings, electrothermal coatings, electromagnetic shielding coatings, conductive films, conductive adhesives and other fields. Background technique [0002] Electronic paste refers to conductive composite materials formed by conductive fillers, organic carriers, solvents, and auxiliary agents such as coupling agents, surfactants, and thixotropic agents. This type of material is the basic material for the preparation of sensitive components, resistor networks, hybrid integrated circuits, surface mount technology, displays, and various electronic discrete components. Through screen printing, leveling, drying, sintering and other processes, electronic paste can be made into thick film integrated c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/20H01B1/24
Inventor 刘兆平张一鸣周旭峰
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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