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Template-based three-dimensional network carbon material/polymer functional composite material and its preparation method

A technology for functional composite materials and polymer materials, which is applied in the processing technology and application field of polymer functional composite materials, can solve the problems of low preparation efficiency, high cost, poor stability, etc., and achieves simple preparation method, low cost, and enhanced flexibility. Effect

Active Publication Date: 2022-02-11
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing three-dimensional carbon material preparation technology generally has problems such as low preparation efficiency, poor stability, and high cost.

Method used

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  • Template-based three-dimensional network carbon material/polymer functional composite material and its preparation method
  • Template-based three-dimensional network carbon material/polymer functional composite material and its preparation method
  • Template-based three-dimensional network carbon material/polymer functional composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Using graphene oxide as a raw material, disperse it in water to form a uniform graphene oxide aqueous solution with a concentration of 1 mg / mL;

[0033] (2) Immerse the polyurethane sponge in the graphene oxide aqueous solution of step (1) for 1 min, adjust the pH of the system to 9-10, add the reducing agent sodium borohydride, wherein the mass ratio of sodium borohydride to graphene oxide is 6:1, Put them together into the reaction container, reduce the reaction in an oven at 100°C for 2 hours, and finally take it out and dry to obtain three-dimensional graphene with polyurethane sponge as the template;

[0034] (3) For the three-dimensional graphene impregnated with polyurethane sponge as a template, the silicone resin of type 1151 was added, and 1wt% curing agent of the silicone resin was added before impregnation, and mixed with the silicone resin evenly. Then cured at room temperature for 12h to obtain a dielectric constant of 1.01×10 4 The three-dimensional ...

Embodiment 2

[0036] (1) Using conductive carbon black as a raw material, disperse it in water to form a uniform conductive carbon black aqueous solution with a concentration of 20 mg / mL;

[0037] (2) Immerse the melamine sponge in the conductive carbon black aqueous solution of step (1) for 20 minutes, adjust the pH of the system to 9-10, and add the reducing agent sodium borohydride, wherein the mass ratio of sodium borohydride to conductive carbon black is 10:1 , and put them into a reaction container together, and reduce them in an oven at 90°C for 4 hours, and finally take them out and dry them to obtain a three-dimensional conductive carbon black with melamine sponge as a template;

[0038] (3) E103 epoxy resin was cast on the three-dimensional conductive carbon black with melamine sponge as the template. Before pouring, 30wt% curing agent of epoxy resin was added and mixed evenly, and then cured at 35°C for 3 hours. Then cured at 80°C for 12 hours, and finally obtained a dielectric c...

Embodiment 3

[0040] (1) Using carbon nanotubes as raw materials, disperse them in water to form a uniform carbon nanotube aqueous solution with a concentration of 14mg / mL;

[0041] (2) Immerse the polyurea sponge in the carbon nanotube aqueous solution of step (1) for 40 minutes, adjust the pH of the system to 9-10, and add the reducing agent lithium borohydride, wherein the mass ratio of lithium borohydride to carbon nanotubes is 8:1 , and put them together into a reaction container, and reduce them in an oven at 80°C for 3 hours, and finally take them out and dry them to obtain three-dimensional carbon nanotubes with polyurea sponge as a template;

[0042] (3) For the three-dimensional carbon nanotubes with polyurea-formaldehyde sponge as the template, the unsaturated resin of model 191 is poured, in which, 1wt%-3wt% accelerator of unsaturated resin is added before pouring, and then 2wt% curing agent is added after stirring Mix evenly, and finally cure at room temperature for 10 hours to...

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Abstract

The invention discloses a template-based three-dimensional network carbon material / polymer functional composite material and a preparation method thereof. In the method, carbon materials such as water-dispersed carbon black, carbon nanotubes, graphene oxide and other carbon materials and borohydride are used as raw materials, and an open-pored sponge is used as a three-dimensional template to obtain a carbon-containing material / borohydride composite sponge by an impregnation method, After drying, different kinds of polymer materials are cast or impregnated, and finally a three-dimensional network carbon material / polymer functional composite material with a relative permittivity greater than 103 is obtained. The material is widely used in the fields of dielectric energy storage materials, electromagnetic shielding, elastic conductors, piezoresistive materials and flexible electronic devices, and the preparation method has the advantages of simple process, low cost and high efficiency.

Description

technical field [0001] The invention relates to the technical field of polymer functional composite material processing technology and application, in particular to a template-based three-dimensional network carbon material and a preparation method of high dielectric constant polymer functional composite material, which can be widely used in dielectric Energy storage materials, electromagnetic shielding, elastic conductors, piezoresistive materials and flexible electronic devices and other fields. Background technique [0002] Carbon is one of the most closely related and important elements in nature, and the carbon materials formed from it also play an important role in people's life and work. Conductive carbon black, carbon fiber, natural graphite, etc. are common carbon materials. Carbon nanotubes and graphene are new carbon materials. They all have excellent electrical, thermal and mechanical properties. The assembly of carbon materials to construct three-dimensional ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08J9/42C08L75/04C08L83/04C08L61/20C08L63/00C08L61/24
CPCC08J9/40C08J9/42C08K3/041C08J2463/00C08K3/04C08J2475/04C08J2483/04C08K2201/011C08K2201/001C08J2375/04C08J2361/24C08J2361/20
Inventor 马传国张红戴培邦张坚
Owner GUILIN UNIV OF ELECTRONIC TECH
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