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A method for preparing flexible conductive composite materials by adjusting graphene alignment by magnetic field

A flexible conductive, composite material technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of easy stacking, agglomeration, uneven distribution, etc., to achieve large-scale production, low requirements for preparation conditions, material Evenly distributed effect

Active Publication Date: 2021-09-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional ways of preparing graphene composites are mainly crushing and recombining, wrapping, spin coating, blending, electrostatic self-assembly, in-situ polymerization, ring-opening polymerization, etc., but in these methods, the mixing method of graphene is random, Uneven distribution, prone to stacking and agglomeration

Method used

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  • A method for preparing flexible conductive composite materials by adjusting graphene alignment by magnetic field
  • A method for preparing flexible conductive composite materials by adjusting graphene alignment by magnetic field
  • A method for preparing flexible conductive composite materials by adjusting graphene alignment by magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the method for preparing a flexible conductive composite material by adjusting the arrangement of graphene through a magnetic field, the specific steps are as follows:

[0027] Step 1. Prepare graphene oxide, ferrous chloride tetrahydrate, and ferric chloride hexahydrate aqueous solutions respectively, and then blend them. Keep the temperature below 15°C and vacuum mechanically stir for 10 minutes at a speed of 500r / min. Add ammonia water dropwise to adjust the pH value 10, mechanically stirred in a water bath at a temperature of 80°C (rotation speed: 500r / min) for 15min, and the mixture was cooled (cooled at 25°C) and then centrifuged to separate the precipitated substance from the lower layer and rinse it with deionized water until medium After drying at 40°C for 12 hours, magnetic graphene powder was prepared; the graphene oxide aqueous solution concentration was 1 / 2mg / mL; in step 1, the mass ratio of ferrous chloride tetrahydrate and ferri...

Embodiment 2

[0034] Such as figure 1 As shown, the method for preparing a flexible conductive composite material by adjusting the arrangement of graphene through a magnetic field, the specific steps are as follows:

[0035] Step 1. Prepare graphene oxide, ferrous chloride tetrahydrate, and ferric chloride hexahydrate aqueous solutions respectively, and then blend them. Keep the temperature below 15°C and stir in vacuum for 15 minutes at a speed of 500 r / min. Add ammonia water dropwise to adjust the pH value 10, mechanically stirred in a water bath at a temperature of 70°C (rotation speed: 500r / min) for 10min, the mixture was cooled (cooled at 25°C), and then centrifuged to separate the precipitated substance from the lower layer and rinse it with deionized water until medium After drying at 60°C for 10 h, magnetic graphene powder was prepared; the graphene oxide aqueous solution concentration was 1 / 2mg / mL; in step 1, the mass ratio of ferrous chloride tetrahydrate to ferric chloride hexahy...

Embodiment 3

[0039] Such as figure 1 As shown, the method for preparing a flexible conductive composite material by adjusting the arrangement of graphene through a magnetic field, the specific steps are as follows:

[0040] Step 1. Prepare graphene oxide, ferrous chloride tetrahydrate, and ferric chloride hexahydrate aqueous solutions respectively, and then blend them, keep the temperature below 15°C and mechanically stir in vacuum for 12 minutes at a speed of 500r / min, add ammonia water dropwise to adjust the pH value 11, mechanically stirred in a water bath (rotating at 500r / min) at a temperature of 75°C for 20min, the mixture was cooled (cooled at 25°C) and then centrifuged to separate the precipitated substance from the lower layer and rinse it with deionized water until medium After drying at 50°C for 11 hours, magnetic graphene powder was prepared; the graphene oxide aqueous solution concentration was 1 / 2mg / mL; in step 1, the mass ratio of ferrous chloride tetrahydrate and ferric chl...

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Abstract

The invention relates to a method for preparing a flexible conductive composite material by regulating the arrangement of graphene by a magnetic field, and belongs to the technical field of development of the flexible conductive composite material. Prepare graphene oxide, ferrous chloride tetrahydrate, and ferric chloride hexahydrate aqueous solutions respectively, then blend and stir mechanically, add ammonia water dropwise to adjust the pH value, mechanically stir in a water bath, and centrifuge the mixed solution after cooling to separate the precipitated substances in the lower layer out, and dry to prepare magnetic graphene powder; ultrasonically disperse magnetic graphene powder and polymer in N,N-dimethylformamide, respectively, and then blend them evenly, add 3,3'-dichloro After ‑4,4'‑diaminodiphenylmethane, continue mechanical stirring, pour the mixture into a petri dish coated with a release agent, put it in a uniform magnetic field generated by a strong neodymium-iron-boron magnet, and then dry it in a vacuum A magnetic graphene / polymer flexible conductive composite was obtained. The invention has simple operation, simple and easy-to-obtain raw materials, and low preparation condition requirements.

Description

technical field [0001] The invention relates to a method for preparing a flexible conductive composite material by regulating the arrangement of graphene by a magnetic field, and belongs to the technical field of development of the flexible conductive composite material. Background technique [0002] Graphene is composed of a single layer of carbon atoms with sp 2 Connected by hybridization, the hybridized carbon atoms are arranged on the six vertices of the hexagonal lattice to form a honeycomb-shaped two-dimensional planar material. Has a huge specific surface area (2600 m 2 / g) and excellent electrical and thermal properties (high-speed electron mobility of 15 000 cm at room temperature 2 / (V s) and good thermal conductivity 5 300 W / (m K)), in addition to having a high basal modulus of elasticity (E≈1 TPa) and ultimate strength (σ≈130 GPa ). Due to the chemical inertness of carbon atoms, graphene exhibits a range of chemical reactivity. At the same time, there are de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L83/04C08L33/02C08K9/02C08K3/04C08K3/22C09K5/14
CPCC08K3/22C08K9/02C08K2003/2275C08K2201/001C08K2201/01C08L2201/04C09K5/14C08K3/042C08L75/04C08L83/04C08L33/02
Inventor 武思蕊李斌赵梁成李仲明
Owner KUNMING UNIV OF SCI & TECH
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