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General electronic paste based on graphene filler

A technology of graphene and methyl methacrylate, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, can solve the problems of poor conductivity of aluminum powder, and achieve the goal of improving conductivity, excellent mechanical properties and good conductivity Effect

Active Publication Date: 2014-09-03
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 Resin Conductive Coatings

[0052] In the first step, 1 ml of silane coupling agent (KH-570, γ-(methacryloyloxy)propyltrimethoxysilane) was weighed and added to 30 ml of deionized water, and 1 ml of methanol was added for hydrolysis for 30 minutes. The function of methanol is to inhibit the cross-linking of silanols and shorten the time required to reach the equilibrium of hydrolysis. Then, 0.61 g of graphene was added to the solution of the silane coupling agent, stirred and reacted for 3 hours, filtered and dried.

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

[0054] The third ste...

Embodiment 2

[0059] Graphene / Ni / Acrylic Resin Conductive Coatings

[0060] The preparation method is basically the same as that of 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 coatings prepared in this example are shown in Table 1.

Embodiment 3-10

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

[0063] The conductive coatings prepared in Examples 1 to 10 were respectively tested for conductivity, adhesion on ABS plates and hardness, 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 varnish film of paint box), 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 incision The layer is peeled off, but the affected cross-cut area cannot be significantly greater than 5%; 2) There is coating peeling off at the intersection of the incision and / or along the edge of the incision, and the affected cross-cut area is significantly greater than 5%, but not significantly greater than 15%; 3) The coating is partially or completely...

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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 Patents(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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