A kind of polyionic liquid modified graphene/thermosetting resin composite material and preparation method thereof

A technology of resin composite material and polyionic liquid, which is applied in the field of graphene/thermosetting resin composite material and its preparation, can solve the problem that the improvement range needs to be improved, and achieve the effects of improving modification efficiency, good dispersibility and excellent electrical performance.

Active Publication Date: 2017-08-01
江苏立一新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, non-covalent modification of graphene can improve its dispersion and obtain polymer composites with increased dielectric constant, but it brings new problems, and the improvement needs to be improved.

Method used

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  • A kind of polyionic liquid modified graphene/thermosetting resin composite material and preparation method thereof
  • A kind of polyionic liquid modified graphene/thermosetting resin composite material and preparation method thereof
  • A kind of polyionic liquid modified graphene/thermosetting resin composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] The present embodiment provides a graphene / bisphenol A type cyanate resin composite material modified by polyionic liquid, and the specific steps of its preparation method are as follows:

[0039] (1) Preparation of epoxy-functionalized ionic liquid monomer

[0040] in N 2 Under protection, mix 1g of N-vinylimidazole and 0.98g of epichlorohydrin, raise the temperature, and reflux for 24 hours; after the reaction, wash repeatedly with ether and dry in vacuum at 25°C for 4 hours to obtain ionic liquid monomer A.

[0041] 1g of prepared ionic liquid monomer A was dissolved in 10mL of methanol to obtain solution B; 0.59g of NaBF 4 The crystals were slowly added to solution B, stirred and reacted at 25°C for 24 hours; the solvent methanol was distilled off under reduced pressure, dissolved in acetone, and the insoluble salt was removed by filtration. Acetone was distilled off under reduced pressure, and vacuum-dried at 40° C. for 4 hours to obtain an epoxy-functionalized i...

Embodiment 2

[0064] The 0.88g polyionic liquid-modified graphene hybrid material prepared in Example 1 was melt-mixed with 100g 2,2-bis(4-cyanophenyl)propane (bisphenol A cyanate) at 160°C, Then ultrasonically disperse and stir at 80° C. for 30 min to obtain a homogeneous mixture. Pour the mixture into the mold, vacuum defoam at 160°C for 30 minutes, and perform curing and post-treatment according to the processes of 160°C / 2h+180°C / 2h+200°C / 2h+220°C / 2h and 240°C / 4h , That is to obtain a polyionic liquid-modified graphene / bisphenol A cyanate resin composite material, wherein the content of graphene is 0.8wt%. The electrical conductivity of the composite material prepared in this embodiment at 1 Hz is shown in the appendix Figure 14 .

Embodiment 3

[0066] The 0.66g polyionic liquid-modified graphene hybrid material prepared in Example 1 was melt-mixed with 100g 2,2-bis(4-cyanophenyl)propane (bisphenol A cyanate) at 160°C, Then ultrasonically disperse and stir at 80° C. for 30 min to obtain a homogeneous mixture. Pour the mixture into the mold, vacuum defoam at 160°C for 30 minutes, and perform curing and post-treatment according to the processes of 160°C / 2h+180°C / 2h+200°C / 2h+220°C / 2h and 240°C / 4h , That is to obtain a polyionic liquid modified graphene / bisphenol A type cyanate resin composite material, wherein the content of graphene is 0.6wt%. The electrical conductivity of the composite material prepared in this embodiment at 1 Hz is shown in the appendix Figure 14 .

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Abstract

The invention relates to a polyion liquid modified graphene / thermosetting resin composite and a preparation method thereof. The preparation method comprises the steps of mixing an N-vinyl heterocyclic compound and epoxy chloropropane, heating, and obtaining an ionic liquid monomer after ending reflux reaction; dissolving the ionic liquid monomer into methanol, and then, slowly adding a NaBF4 crystal to obtain an epoxy functionalized ionic liquid monomer; adding the epoxy functionalized ionic liquid monomer into a deionized water dispersing solution of graphene; then, adding an ethanol solution of azobisisobutyronitrile to obtain a polyion liquid modified graphene hybrid material with excellent electric properties, favorable dispersibility and good compatibility together with thermosetting resin; and after mixing, curing and aftertreating according to a thermosetting resin curing process to obtain the polyion liquid modified graphene / thermosetting resin composite with high dielectric constant, low dielectric loss and low percolation threshold. The preparation method of the composite is simple in process, controllable in reaction and short in period.

Description

technical field [0001] The invention relates to a dielectric resin-based composite material and a preparation method thereof, in particular to a polyionic liquid-modified graphene / thermosetting resin composite material and a preparation method thereof. Background technique [0002] High dielectric constant materials are one of the research and development hotspots in the field of functional materials today, and they have great application value in electronic information, machinery, aerospace, biomedicine and other fields. Compared with traditional inorganic materials with high dielectric constant, conductor / polymer matrix composites have attracted extensive attention due to their light weight, good processability and toughness. Graphene nanosheets not only have the thinnest two-dimensional structure, but also have large specific surface area and huge electron mobility. Therefore, graphene / polymer matrix composites can generally obtain higher Dielectric constant, showing gre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08L79/04C08L63/00C08K9/08C08K3/04
CPCC08K3/04C08K9/08C08L63/00C08L79/04C08L79/08
Inventor 顾嫒娟徐春曦梁国正袁莉
Owner 江苏立一新材料科技有限公司
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