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Nano silver wire added conductive composite material, and preparation method

A technology of conductive composite materials and silver nanowires, applied in the field of nanomaterials, can solve the problems of poor conductivity of conductive composite materials and the like, and achieve the effect of good conductivity

Inactive Publication Date: 2006-12-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of poor conductivity of the conductive composite material when the silver powder content is low, the invention provides a conductive composite material added with silver nanowires and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Liquid A: take 100 parts of acrylic resin as the polymer matrix, add 40 parts of acetone at the same time, and stir mechanically for 1-5 minutes;

[0022] (2) Liquid B: Take 20 parts of silver powder and 1 part of silver nanowires, mix them, then add 40 parts of acetone, mechanically stir and ultrasonically disperse for 5 minutes, and mix them;

[0023] Mix the above liquids A and B, mechanically stir and ultrasonically disperse for 12 minutes, and cure at 40°C for 72 hours. The volume resistivity of the obtained conductive composite material is 1.45×10 -3 Ω·cm.

Embodiment 2

[0025] (1) Liquid A: take 100 parts of acrylic resin as the polymer matrix, add 40 parts of acetone at the same time, and stir mechanically for 1-5 minutes;

[0026] (2) Liquid B: Take 41 parts of silver powder and 4 parts of silver nanowires, mix them, then add 40 parts of acetone, mechanically stir and ultrasonically disperse for 10 minutes, and mix them;

[0027] Mix the above liquids A and B, mechanically stir and ultrasonically disperse for 10 minutes, and cure at 40°C for 60 hours. The volume resistivity of the obtained conductive composite material is 2.43×10 -4 Ω·cm.

Embodiment 3

[0029] (1) Liquid A: take 100 parts of acrylic resin as the polymer matrix, add 40 parts of acetone at the same time, and stir mechanically for 1-5 minutes;

[0030] (2) Liquid B: Take 33 parts of silver powder and 8 parts of silver nanowires, mix them, then add 40 parts of acetone, mechanically stir and ultrasonically disperse for 8 minutes, and make them mix;

[0031] Mix the above liquids A and B, mechanically stir and ultrasonically disperse for 9 minutes, and cure at 70°C for 48 hours. The volume resistivity of the obtained conductive composite material is 5.30×10 -5 Ω·cm.

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Abstract

Blending ratio of each component in the composite material is as following according to mass: silver powder 20-41 portions, Nano silver wire 1-8 portions, and acrylic resin 100 portions. The preparation includes steps: mechanical stirring acetone added to acrylic resin being as basal body of macromolecule; adding acetone into mixed silver powder and silver wire; combining with ultra sonic dispersion, mechanical stirring the mixed silver powder and wire; combining with ultra sonic dispersion, mechanical stirring the prepared two liquids to disperse particles in resin; solidifying the admixture under aeration environment at 40-70 degrees. Comparing with prior art, the disclosed composite material possesses better conductivity when total silver fillings are same; lower quantity of silver is needed when conductivities are closes. The invention is applicable to connection of electronic package to meet military and civil requirements.

Description

technical field [0001] The invention relates to nanometer materials, in particular to a conductive composite material added with silver nanowires and a preparation method thereof. Background technique [0002] Conductive composite materials are mainly composed of polymer matrix and conductive fillers, and are widely used in various military and civilian fields, especially used to replace traditional Pb / Sn solder in the microelectronic packaging and connection industry. With the continuous deepening of research on nanomaterials in recent years, it has been found that using low-dimensional nanomaterials as fillers in conductive composites can achieve better conductive effects, lower the conductivity threshold, and reduce the amount of fillers. This shows that the use of low-dimensional nanomaterials is expected to obtain conductive composites with both high electrical conductivity and good mechanical properties. Such as the use of carbon nanotubes and silver nanoparticles hav...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00B82B1/00B82B3/00
Inventor 王立陈昌陈旭
Owner ZHEJIANG UNIV
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