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A kind of toughened conductive epoxy resin composite material and preparation method thereof

A technology of conductive epoxy resin and composite materials, which is applied in the field of epoxy resin composite materials, can solve the problems of high cost, complex and cumbersome process steps, etc., and achieve the effect of toughening and strengthening, improving impact resistance and reducing defect degree

Active Publication Date: 2022-03-25
SHANDONG DAZHAN NANO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of high cost and complex and cumbersome process steps in the existing preparation process of conductive high-reinforced epoxy resin, the present invention provides a novel toughened conductive epoxy resin composite material and its preparation method, which effectively solves the problem of The exfoliation of graphene in the epoxy resin matrix, the group opening and dispersion of carbon nanotubes, promote the formation of an effective conductive network for the composite filler of carbon nanotubes and carbon black, and the functionalized carbon nanotubes can be combined with the epoxy resin matrix during the curing reaction. Form a new chemical combination, greatly improving the mechanical properties such as impact resistance and bending resistance

Method used

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  • A kind of toughened conductive epoxy resin composite material and preparation method thereof
  • A kind of toughened conductive epoxy resin composite material and preparation method thereof
  • A kind of toughened conductive epoxy resin composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] Example 1 A new toughened conductive epoxy resin composite material and preparation method.

[0042] Raw material ratio composition: 200g methylol bisphenol A epoxy resin, 12g graphene, 3.5g hydroxylated carbon nanotubes, 3.5g conductive carbon black, 1.5g polyvinylpyrrolidone, 8g curing agent, 0.4g g defoamer.

[0043] (1) Weigh 200g of hydroxymethyl bisphenol A epoxy resin, heat it to 80°C, reduce the viscosity to 2300-2500mPa·s, add 1.5g of polyvinylpyrrolidone, stir evenly;

[0044] (2) Add 12g of graphene, 3.5g of hydroxylated carbon nanotubes and 3.5g of conductive carbon black to the methylol bisphenol A epoxy resin, and then keep stirring at 2200rpm for 70min to obtain a pre-dispersed material;

[0045] (3) Transfer the pre-dispersed material to a 500ml nano-sand mill, use zirconium balls with a diameter of 1mm and 2mm with a mass ratio of 1:1, and perform a shear grinding cycle for 6 hours;

[0046] (4) The material treated in step (3) is at 120°C under negat...

Embodiment 2

[0050] Example 2 A novel toughened conductive epoxy resin composite material and preparation method.

[0051] Raw material ratio composition: 1500g of bisphenol F epoxy resin, 12g of graphene, 16g of carboxylated carbon nanotubes, 40g of conductive carbon black, 18g of sodium dodecyl sulfonate, 50g of curing agent, 4.5g of disinfectant Foaming agent.

[0052] (1) 1500g of bisphenol F epoxy resin, add 600g of toluene, stir evenly, the viscosity drops to 1000-1600mPa·s, add 18g of sodium dodecyl sulfonate, stir evenly;

[0053] (2) Add 70g of graphene, 16g of carboxylated carbon nanotubes and 40g of conductive carbon black to bisphenol F epoxy resin, and then keep stirring at 1500rpm for 90min to obtain pre-dispersed material;

[0054] (3) The pre-dispersed material is transferred to a 3L nano-sand mill, equipped with zirconium balls with a diameter of 0.8mm and 1.5mm with a mass ratio of 1.2:1, and the shear grinding cycle is processed for 12h;

[0055] (4) The material treat...

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Abstract

The invention relates to the technical field of epoxy resin composite materials, in particular to a novel toughened conductive epoxy resin composite material and a preparation method thereof. The specific steps are that the epoxy resin is first added with a viscosity-reducing solvent or heated to reduce the viscosity to a suitable range, then adding graphene, functionalized carbon nanotubes and conductive carbon black, then dispersing and stirring, and then transferring to zirconium balls for shearing and grinding Processing, after cooling down to remove the viscous reducing solvent, add defoamer and curing agent and disperse evenly, pour the liquid into the mold, solidify under negative pressure, and demould after cooling to obtain the product. It effectively solves the problem of group opening and dispersion of carbon nanotubes in the epoxy resin matrix, and promotes the formation of an effective conductive network between the composite fillers of carbon nanotubes and carbon black. The chemical combination greatly improves the mechanical properties such as impact resistance and bending resistance.

Description

technical field [0001] The invention relates to the technical field of epoxy resin composite materials, in particular to a novel epoxy resin obtained by grinding and compounding epoxy resin, graphene, carbon nanotubes and conductive carbon black with zirconium balls, and then defoaming and curing. A resin composite material and a preparation method thereof, namely a novel toughened conductive epoxy resin composite material and a preparation method thereof. Background technique [0002] Carbon nanotubes, as one-dimensional nanomaterials, have excellent physical and mechanical properties, mainly composed of coaxial circular tubes with several layers to dozens of layers composed of carbon atoms arranged in a hexagonal shape. It has a very large aspect ratio, usually between 1-100 nm in diameter and several microns to hundreds of microns in length. It is precisely because of its large aspect ratio that carbon nanotubes have excellent mechanical, electrical, electrical and therm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L39/06C08K3/04C08K9/00
CPCC08L63/00C08K3/042C08K3/041C08K3/04C08K9/00C08K2201/001C08K2201/011C08L39/06
Inventor 耿磊鞠坤杜垚纪文雅李岩
Owner SHANDONG DAZHAN NANO MATERIALS
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