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High barrier composite material and preparation method based on two-dimensional nanofiller magnetically induced orientation

A two-dimensional nano and composite material technology, applied in the field of resin composite material preparation, can solve the problems of reducing the magnetic response orientation of modified graphene sheets, poor interface bonding of resin matrix, easy agglomeration of modified graphene sheets, etc., to achieve improvement Interface bonding performance, not easy to fall off, wide application range

Active Publication Date: 2017-12-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the required magnetic field strength of this method is greatly reduced, there are still many problems: Fe 3 o 4 Magnetic nanoparticles and graphene sheets are combined by the attractive force between positive and negative charges, the interface binding force is weak, and Fe 3 o 4 The magnetic nanoparticles are easy to fall off, which greatly reduces the magnetic response orientation of the modified graphene sheet; the modified graphene sheet is easy to agglomerate in the resin, and the interface bonding with the resin matrix is ​​poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Take 0.5g of graphene oxide and add it to the reactor, then add 500ml of deionized water, disperse it with 300w ultrasonic for 30min, pass nitrogen gas for 15 minutes, remove the air, turn on the mechanical stirring, under the protection of nitrogen, add 4.68 gFeCl 3 ·6H 2 O and 1.72g FeCl 2 4H 2 O, add 0.4mol / L NaOH aqueous solution dropwise until the pH value of the system reaches 11, place the reactor in a uniform magnetic field with a strength of 0.2T, and react at 55°C for 2 hours. After the reaction is completed, add 2.0g of dopamine hydrochloride , and then use tris(hydroxymethyl)aminomethane and 1mol / L hydrochloric acid to adjust the pH to 8.5, and react at 30°C for 12h; after the reaction is completed, separate with a magnet, wash with water until neutral, and dry to obtain Fe 3 o 4 Magnetically modified graphene oxide.

[0023] b. Fe 3 o 4Magnetically modified graphene oxide is mixed with epoxy resin and curing agent, the mass ratio of TDE85 epoxy re...

Embodiment 2

[0027] a. Take 0.5g of graphene oxide and add it to the reactor, then add 500ml of deionized water, disperse it with 300w ultrasonic for 30min, pass nitrogen gas for 15 minutes, remove the air, turn on the mechanical stirring, under the protection of nitrogen, add 4.68 gFeCl 3 ·6H 2 O and 1.72g FeCl 2 4H 2 O, add 0.4mol / L NaOH aqueous solution dropwise until the pH value of the system reaches 11, place the reactor in a uniform magnetic field with a strength of 0.2T, and react at 55°C for 2 hours. After the reaction is completed, add 2.0g of dopamine hydrochloride , and then use tris(hydroxymethyl)aminomethane and 1mol / L hydrochloric acid to adjust the pH to 8.5, and react at 30°C for 12h; after the reaction is completed, separate with a magnet, wash with water until neutral, and dry to obtain Fe 3 o 4 Magnetically modified graphene oxide.

[0028] b. Fe 3 o 4 Magnetically modified graphene oxide is mixed with epoxy resin and curing agent, the mass ratio of TDE85 epoxy r...

Embodiment 3

[0032] a. Take 0.5g of graphene oxide and add it to the reactor, then add 500ml of deionized water, disperse it with 300w ultrasonic for 30min, pass nitrogen gas for 15 minutes, remove the air, turn on the mechanical stirring, under the protection of nitrogen, add 4.68 gFeCl 3 ·6H 2 O and 1.72g FeCl 2 4H 2 O, add 0.4mol / L NaOH aqueous solution dropwise until the pH value of the system reaches 11, place the reactor in a uniform magnetic field with a strength of 0.2T, and react at 55°C for 2 hours. After the reaction is completed, add 2.0g of dopamine hydrochloride , and then use tris(hydroxymethyl)aminomethane and 1mol / L hydrochloric acid to adjust the pH to 8.5, and react at 30°C for 12h; after the reaction is completed, separate with a magnet, wash with water until neutral, and dry to obtain Fe 3 o 4 Magnetically modified graphene oxide.

[0033] b. Fe 3 o 4 Magnetically modified graphene oxide is mixed with epoxy resin and curing agent, the mass ratio of TDE85 epoxy r...

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Abstract

The invention discloses a high-barrier composite material and a preparation method based on two-dimensional nanofiller magnetic induced orientation, and relates to preparation of high-barrier composite materials. The high-barrier composite material is characterized in that: a, by using a coprecipitation method, under the action of a magnetic field, Fe3O4 is loaded to the surface of two-dimensional nanofiller in a magnetic nanorod manner, and the two-dimensional nanofiller is wrapped with dopamine, so that Fe3O4 magnetic nanorods can be stably combined with the two-dimensional nanofiller, and meanwhile the boundary combination performance of the two-dimensional nanofiller and a resin substrate is improved; b, the magnetic modified two-dimensional nanofiller is orientated under the induction of the magnetic field, so that a resin solidification system is not affected, and moreover as the intensity and the direction of the magnetic field can be randomly adjusted, and orientation distribution of the two-dimensional nanofiller is easy to achieve and wide in application range. By adopting the high-barrier composite material, orientation arrangement of the two-dimensional nanofiller in the resin substrate can be achieved, the barrier effect of the two-dimensional nanofiller can be brought into play efficiently, the barrier performance of a resin substrate composite material is effectively improved, and the application range of the resin substrate composite material in fields such as aviation, aerospace, energy and traffic is widened.

Description

Technical field: [0001] The invention belongs to the field of preparation of resin composite materials, and in particular relates to a two-dimensional nano-filler loaded with one-dimensional magnetic nano-rods, which is added to an epoxy resin system and oriented by a magnetic field to prepare a high-barrier composite material. Background technique: [0002] Resin-based composite materials have been widely used in many fields such as aerospace, green energy, and transportation because of their excellent mechanical properties, corrosion resistance, and easy processing. In recent years, resin-based composite materials have been more and more widely used in the preparation of various types of pressure vessels to meet the application requirements of separation, storage and transportation of gas and liquid substances, which puts higher demands on the barrier properties of composite materials. Require. However, due to the high degree of crosslinking of the resin matrix, its cryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L63/02C08K9/12C08K9/10C08K3/22C08K3/04C08K3/34
CPCC08K3/04C08K3/22C08K3/346C08K9/10C08K9/12C08K2003/2275C08K2201/011C08L2201/14C08L63/00
Inventor 贾晓龙尚庭华曹阳李文斌杨文刚杨小平
Owner BEIJING UNIV OF CHEM TECH