Modified graphene/thermosetting resin composite material and preparation method thereof

A technology of resin composite materials and graphene, which is applied in the field of modified graphene/thermosetting resin composite materials and its preparation, can solve the problems of deteriorating composite material manufacturability, hindering electron movement on graphene, and insufficient electrical properties of graphene Take advantage of other issues to achieve the effects of reducing leakage current, low manufacturing cost, and wide applicability

Inactive Publication Date: 2014-07-23
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dispersion of graphene in the resin can be improved, the dielectric loss and dielectric constant of the polyvinyl alcohol-graphene / polyvinylidene fluoride composite are lower than those of graphene / polyvinylidene fluoride under the same graphene conductor content. Corresponding values ​​for polyvinylidene fluoride composites
This is because the polyvinyl alcohol covered on the graphene sheet hinders the movement of electrons on the graphene, so that the excellent electrical properties of graphene are not fully utilized.
In addition, the coating of polyvinyl alcohol on graphene increases the percolation threshold of the composite material. In order to obtain a high dielectric constant, it is often necessary to add a high content of functional body (by volume, the percolation threshold of graphene / polyvinylidene fluoride The threshold is 0.61%, while the percolation threshold of polyvinyl alcohol-graphene / polyvinylidene fluoride is 2.24%, which is 3.67 times that of the former), which will deteriorate the manufacturability of the composite material, and even other properties such as mechanical properties

Method used

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  • Modified graphene/thermosetting resin composite material and preparation method thereof
  • Modified graphene/thermosetting resin composite material and preparation method thereof
  • Modified graphene/thermosetting resin composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] 1. Preparation of titanium diboride oxide

[0039] Under aerobic conditions, oxidize 10 g of titanium diboride with a particle size of less than 200 nanometers at 600 ° C for 10 minutes to obtain a crude product, disperse it in 200 mL of ethanol, stir it, filter it with suction, and dry it to obtain oxidized titanium diboride , and its infrared spectrum and X-ray diffraction patterns are shown in the attached figure 1 and 2 .

[0040] 2. Preparation of aminated titanium diboride oxide

[0041]Disperse 10g of titanium diboride oxide into 50mL of hydrogen peroxide solution with a mass fraction of 35%, and react at 100°C for 5h; after the reaction, wash, filter with suction, and dry in a vacuum oven at 60°C for 12h to obtain Hydroxylated titanium diboride oxide;

[0042] Add 10 g of hydroxylated oxidized titanium diboride to 100 mL of absolute ethanol, mix well by ultrasonic, add 0.1 g of γ-aminopropyltriethoxysilane under the protection of nitrogen, and stir at 60° C....

Embodiment 2

[0054] 1. Preparation of modified graphene

[0055] Weigh 1g of graphite oxide and disperse it in 600mL N,N-dimethylformamide, stir and sonicate for 1h to obtain a graphene oxide dispersion, add 0.025g of aminated titanium diboride oxide to the graphene oxide dispersion , ultrasonically stirred, reacted at 60°C for 12h, then added 10g L-ascorbic acid, raised the temperature of the reaction solution to 90°C and reacted for 24h, then filtered, washed, and dried to obtain modified graphene, which was magnified 25 thousand times The scanning electron microscope picture and X-ray diffraction picture are respectively shown in the appendix image 3 and 4 .

[0056] 2. Preparation of modified graphene / epoxy resin composites

[0057] Add 0.787g of modified graphene and 100g of epoxy resin (grade E-51) into the flask, stir at 60°C and ultrasonic for 1 hour, vacuum degassing for 30min, add 4g of 2-ethyl-4-methyl imidazole, continue to stir for 10 minutes to obtain a uniform mixture; ...

Embodiment 3

[0059] 1. Preparation of modified graphene

[0060] Weigh 1g of graphite oxide and disperse it in 600mL N,N-dimethylformamide, stir and sonicate for 1h to obtain a graphene oxide dispersion, add 0.05g of aminated titanium diboride oxide to the graphene oxide dispersion , ultrasonically stirred, reacted at 60°C for 12h, then added 10g L-ascorbic acid, raised the temperature of the reaction solution to 90°C and reacted for 24h, then filtered, washed, and dried to obtain modified graphene, which was magnified 25 thousand times The scanning electron microscope picture and X-ray diffraction picture are respectively shown in the appendix image 3 and 4 .

[0061] 2. Preparation of modified graphene / epoxy resin composites

[0062] Add 0.825g of modified graphene and 100g of epoxy resin (grade E-51) into the flask, stir at 60°C and ultrasonic for 1 hour, vacuum degassing for 30min, add 4g of 2-ethyl-4-methyl imidazole, continue to stir for 10 minutes to obtain a uniform mixture; p...

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Abstract

The invention relates to a modified graphene / thermosetting resin composite material and a preparation method thereof. The method comprises the steps of dispersing graphite oxide into N, N-dimethylformamide, adding titanium diboride oxide subjected to amination, filtering, washing and drying reactants to obtain modified graphene; curing modified graphene and molten heat-curable resin to obtain the modified graphene / thermosetting resin composite material. The composite material has the advantages of high dielectric constant, low dielectric loss and low percolation threshold value; moreover, the control of the dielectric properties of the composite material can be realized by regulating the changes of the content of graphene surface-coated titanium diboride. The preparation method of the composite material, provided by the invention, has the characteristics of simple process, low cost, wide applicability and the like.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a modified graphene / thermosetting resin composite material and a preparation method thereof. Background technique [0002] High dielectric constant polymer-based composites, which have the advantages of light weight, easy processing, low cost and good mechanical properties, are attracting widespread attention. They have good functions of storing electric energy and uniform electric field, and play an important role in many cutting-edge industrial fields. Role. Conductor / polymer matrix composites are an important type of materials with high dielectric constant. In recent years, scholars at home and abroad have conducted a lot of research on graphene / polymer matrix composites. Modification of graphene can effectively solve its agglomeration problem and improve the dielectric properties of composite materials. [0003] Before the present invention was made, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L79/04C08L63/00C08K9/10C08K9/04C08K9/02C08K3/04
CPCC08K3/04C08K9/02C08K9/04C08K9/10C08L79/04C08L79/08C08L2203/20C08L63/00
Inventor 顾嫒娟王童星梁国正袁莉
Owner SUZHOU UNIV
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