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A kind of graphene/polymethacrylic acid-2-(n-carbazolyl) ethyl ester brush composite material and its preparation method and application

A technology of polymethacrylic acid and composite materials, which is applied in the field of information technology and new materials, can solve the problems of unfavorable devices and difficult dispersion of graphene, and achieve the effects of low turn-on voltage, high density and reduced resistivity

Inactive Publication Date: 2017-11-21
湖北技联志成科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene itself is difficult to disperse in solution, which is not conducive to the use of low-cost solution processing methods to prepare devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of graphene / polymethacrylate-2-(N-carbazolyl) ethyl ester brush composite material with memory effect, its preparation method comprises the following steps:

[0029] 1) Disperse 0.5g of graphene oxide, 30mL of 2-bromoisobutyryl bromide and 15mL of triethylamine in 50mL of N,N-dimethylformamide, react in an ice-water bath for 24h, then centrifuge, Washing and drying to obtain graphene oxide containing initiating groups;

[0030] 2) Disperse 0.1 g of graphene oxide containing initiator groups in 5 mL of N,N-dimethylformamide, add 3 mg of cuprous bromide, 0.5 mg of copper bromide, 0.15 mmol of Pentamethyldiethylenetriamine and 1.2mmol of 2-(N-carbazolyl)ethyl methacrylate were heated to 60°C for constant temperature reaction for 24h, and then centrifuged, washed and dried to obtain surface-grafted polymethylmethacrylate Graphene oxide based on 2-(N-carbazolyl)ethyl acrylate brushes;

[0031] 3) Disperse 0.1g of graphene oxide grafted with poly-2-(N-carbazolyl)ethy...

Embodiment 2

[0033] A kind of graphene / polymethacrylate-2-(N-carbazolyl) ethyl ester brush composite material with memory effect, its preparation method comprises the following steps:

[0034] 1) Disperse 0.6g of graphene oxide, 20mL of 2-bromoisobutyryl bromide and 10mL of triethylamine in 60mL of chloroform, react in an ice-water bath for 24h, then centrifuge, wash and dry to obtain group of graphene oxide;

[0035] 2) Disperse 0.1 g of graphene oxide containing initiator groups in 6 mL of N,N-dimethylformamide, add 4 mg of cuprous chloride, 0.6 mg of copper chloride, 0.2 mmol of Pentamethyldiethylenetriamine and 1.5mmol of 2-(N-carbazolyl)ethyl methacrylate were heated to 65°C for constant temperature reaction for 24h, and then centrifuged, washed and dried to obtain surface-grafted polymethylmethacrylate Graphene oxide based on 2-(N-carbazolyl)ethyl acrylate brushes;

[0036] 3) Disperse 0.1g of graphene oxide grafted with poly-2-(N-carbazolyl)ethyl methacrylate on the surface in 30m...

Embodiment 3

[0038] A kind of graphene / polymethacrylate-2-(N-carbazolyl) ethyl ester brush composite material with memory effect, its preparation method comprises the following steps:

[0039] 1) Disperse 0.5g of graphene oxide, 20mL of 2-bromoisobutyryl bromide and 20mL of triethylamine in 70mL of N,N-dimethylformamide, react in an ice-water bath for 36h, and then centrifuge, Washing and drying to obtain graphene oxide containing initiating groups;

[0040] 2) Disperse 0.15 g of graphene oxide containing initiator groups in 8 mL of N,N-dimethylformamide, add 3 mg of cuprous bromide, 0.7 mg of copper bromide, 0.25 mmol of Bipyridine and 1.2 mmol of 2-(N-carbazolyl) ethyl methacrylate were heated to 60°C for constant temperature reaction for 20 h, and then centrifuged, washed and dried to obtain surface-grafted polymethacrylic acid-2-( Graphene oxide brushed with N-carbazolyl) ethyl ester;

[0041]3) Disperse 0.15g of graphene oxide grafted with poly-2-(N-carbazolyl)ethylmethacrylate brus...

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Abstract

The invention discloses a graphene / polymethacrylic acid-2-(N-carbazolyl) ethyl ester brush composite material with memory effect, a preparation method and an application thereof. In the present invention, firstly, by introducing initiating groups on the surface of graphene oxide, using surface-induced atom transfer radical polymerization technology to graft functional polymer brushes on the surface of graphene oxide, and then reacting with a reducing agent to obtain a graphene / polymer brush composite material . The present invention improves the solution processability of graphene by grafting functional polymer brushes on the surface of graphene; the conductivity of graphene reduces the resistance of functional polymer brushes, and the relationship between graphene and polymer brush functional groups The interaction makes the composite material have good carrier transport performance. The composite material prepared by the invention is used as an electrical active intermediate layer to construct an information storage device, which can exhibit lower turn-on voltage, higher switch current ratio and good stability.

Description

technical field [0001] The invention belongs to the field of information technology and new materials, and in particular relates to a graphene / polymethacrylate-2-(N-carbazolyl) ethyl ester brush composite material with storage effect and its preparation method and application. Background technique [0002] With the rapid development of information technology, there is an increasing demand for electronic products with extremely fast storage speed and high storage capacity. Traditional silicon-based semiconductor materials and the electronic devices they make are facing the limit of size reduction and cost reduction. Due to the unique physical and chemical properties of nanocomposites, they have gradually come to the fore in the development of next-generation electronic products. At present, the development of storage devices based on nanocomposite materials is still in its infancy, and many problems such as the performance and mechanism of storage devices need to be solved u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F220/34C08F8/04H01L51/00
Inventor 李亮郑伟倩李思博刘仿军喻湘华
Owner 湖北技联志成科技有限公司
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