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Modified conductive paste and preparation method and application thereof

A conductive paste and modification technology, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problem of low conductivity of carbon-based conductive paste and poor conductive effect of carbon-based conductive paste and other issues, to achieve the effect of low cost, high thermal conductivity and high electrical conductivity

Active Publication Date: 2019-08-23
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conductivity of carbon-based conductive paste is still relatively low, especially when the content of carbon materials is low, the conductive effect of carbon-based conductive paste is very poor

Method used

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  • Modified conductive paste and preparation method and application thereof
  • Modified conductive paste and preparation method and application thereof
  • Modified conductive paste and preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0052] The embodiment of the present application also provides a method for preparing the above-mentioned modified conductive paste, which includes the following steps:

[0053] Step 1: Mix the carbon-based conductive paste and the organic solvent to form a carbon-based conductive paste solvent, that is, the first solution.

[0054] Mix the carbon nanotubes, hyperbranched polyethylene and organic solvent to disperse the carbon nanotubes uniformly to form a mixed solution of carbon nanotubes / hyperbranched polyethylene, which is the second solution. Normally, the carbon nanotubes and hyperbranched polyethylene In the initial mixed solution formed by uniformly mixing ethylene and organic solvent, the concentration of carbon nanotubes is 0.5-500 mg / mL, and the mass ratio of hyperbranched polyethylene to carbon nanotubes is 0.005-10:1.

[0055] In this embodiment, the organic solvent includes at least one selected from the group consisting of chloroform, tetrahydrofuran, petroleum ether a...

Embodiment 4

[0108] The difference between Examples 4-10 is that the types of carbon nanotubes added are different. Example 4 uses ordinary single-walled carbon nanotubes SWCNT, and Examples 5-7 use double-walled carbon nanotubes DWCNT. , Multi-walled carbon nanotubes MWCNT, high-conductivity multi-walled carbon nanotubes HEMWCNT, Examples 8-10 used multi-walled carbon nanotubes MWCNT with functional groups. Among them, single-walled carbon nanotubes SWCNT are the most expensive and have better modification effects. Double-walled carbon nanotubes DWCNT and multi-walled carbon nanotubes MWCNT can be combined with carbon-based conductive paste with the assistance of hyperbranched polyethylene HBPE. Compatible, can greatly improve the conductivity of carbon-based conductive paste; Compared with the above several types of carbon nanotubes, HEMWCNT with high conductivity multi-walled carbon nanotubes can be greatly improved with a small amount of addition due to its different parameters The cond...

Embodiment 1

[0123] The difference between Example 1 and Example 11 is that the amount of carbon nanotubes added is different. Figure 4 The left picture in the middle is the brightness picture of the LED bulb of the modified conductive paste in Example 1. Figure 4 The right picture in the middle is the brightness diagram of the LED bulb of the modified conductive paste of Example 11. Such as Figure 4 As shown, the part where the black mass is connected with the wire is modified conductive paste, which can be molded into various shapes at room temperature. The LED bulb uses a series circuit, so the Figure 4 The circled part is the brightness of the bulb in the normal circuit, and the dark part is the brightness of the bulb corresponding to the modified conductive paste; comparing the brightness of the LED bulb in the left and right pictures, it can be clearly observed Figure 4 The brightness of the LED bulb in the middle right picture is higher, that is, as the content of carbon nanot...

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Abstract

The embodiment of the invention provides modified conductive paste and a preparation method and application thereof, and relates to the field of conductive paste. The modified conductive paste comprises the following raw materials in percentage by mass: 1%-90% of carbon-based conductive paste, 5%-60% of carbon nanotubes and 5%-50% of hyperbranched polyethylene, wherein a three-dimensional conductive network is formed among the carbon-based conductive paste, the carbon nanotubes and the hyperbranched polyethylene. The preparation method of the modified conductive paste mainly comprises the following steps: mixing carbon-based conductive paste with an organic solvent to form a first solution; mixing carbon nanotubes, hyperbranched polyethylene and an organic solvent, and uniformly dispersingthe carbon nanotubes to form a second solution; and uniformly mixing the first solution and the second solution, and removing the organic solvent. The modified conductive paste is high in conductivity and low in cost, and can be made into wires; and the preparation conditions are mild, the process is simple, efficient and environment-friendly.

Description

Technical field [0001] This application relates to the field of conductive paste, and specifically to a modified conductive paste and a preparation method and application thereof. Background technique [0002] Although metal materials are used as conductive materials everywhere in life, metal materials as conductive materials also have unavoidable shortcomings. For example, since the current per unit area of ​​the wire needs to be large, metals with high melting point and low resistivity are generally used as conductive materials to make the wires. Processing metal materials that meet the needs of use will not only consume a lot of energy but also cause environmental damage. Great pollution. Therefore, it is urgent to develop materials that are easy to process, low cost, pollution-free and excellent in electrical conductivity. [0003] Current research has found that carbon-based conductive paste has a certain degree of conductivity. The main components of carbon-based conductive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/24H01B13/00
CPCH01B1/24H01B13/00
Inventor 徐立新张博远张高乐周康
Owner ZHEJIANG UNIV OF TECH
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