Preparation method of modified polymethyl-methacrylate graphene nanoribbon (PMMA-GNR)

A technology of polymethyl methacrylate and methyl methacrylate is applied in the field of preparation of nanocomposite materials, which can solve the problems of poor interfacial force between graphene nanoribbons and polymers, and achieve significant effects and enhanced effects.

Inactive Publication Date: 2012-08-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not solve the problem of poor interfacial force between graphene nanoribbons and polymers.

Method used

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  • Preparation method of modified polymethyl-methacrylate graphene nanoribbon (PMMA-GNR)
  • Preparation method of modified polymethyl-methacrylate graphene nanoribbon (PMMA-GNR)
  • Preparation method of modified polymethyl-methacrylate graphene nanoribbon (PMMA-GNR)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In a 100 ml three-necked flask, add 50 ml of concentrated sulfuric acid, 8.0 g of potassium permanganate, 2.0 g of multi-walled carbon nanotubes, 70 o Mechanically stir the reaction at C for 1 h; weigh 15 mg of the solid powder obtained by the reaction, dissolve it in 30 ml of N,N-dimethylformamide, and then add 30 ml of polymethacrylic acid-modified graphene nanoribbon dispersion (0.5 mg / ml ), nitrogen protection, ultrasonic dispersion for 2 h, then added 3.0 g methyl methacrylate, 0.0246 g azobisisobutyronitrile, magnetic stirring, and heated at 80 °C for 48 h. After the reaction was finished, the product was poured into 300 ml of methanol, and a black precipitate was produced. After centrifugation, the lower precipitate was collected, washed with methanol several times, and dried in a vacuum oven at 50 °C to obtain a black powdery solid, which was the target product polymethacrylic acid-modified graphene nanobelts.

[0031] The polymethacrylic acid modified graphene...

Embodiment 2

[0037] In a 100 ml three-necked flask, add 50 ml of concentrated sulfuric acid, 8.0 g of potassium permanganate, 2.0 g of multi-walled carbon nanotubes, 70 o Mechanically stir the reaction at C for 1 h; weigh 15 mg of the solid powder obtained by the reaction, dissolve it in 30 ml of N,N-dimethylformamide, and then add 30 ml of polymethacrylic acid-modified graphene nanoribbon dispersion (0.5 mg / ml ), nitrogen protection, ultrasonic dispersion for 2 h, then adding 2.25 g methyl methacrylate, 0.0185 g azobisisobutyronitrile, magnetic stirring, and heating at 80 °C for 48 h. After the reaction was finished, the product was poured into 300 ml of methanol, and a black precipitate was produced. After centrifugation, the lower precipitate was collected, washed with methanol several times, and dried in a vacuum oven at 50 °C to obtain a black powdery solid, which was the target product, polymethacrylic acid-modified graphene nanobelts.

[0038] The polymethacrylic acid modified grap...

Embodiment 3

[0043] In a 100 ml three-necked flask, add 50 ml of concentrated sulfuric acid, 8.0 g of potassium permanganate, 2.0 g of multi-walled carbon nanotubes, 70 oMechanically stir the reaction at C for 1 h; weigh 15 mg of the solid powder obtained from the reaction, dissolve it in 30 ml of N,N-dimethylformamide, and then add 30 ml of polymethacrylic acid-modified graphene nanoribbon dispersion (0.5 mg / ml) , nitrogen protection, ultrasonic dispersion for 2 h, then added 1.5 g methyl methacrylate, 0.0123 g azobisisobutyronitrile, magnetic stirring, 80 ℃ heating reaction for 48 h. After the reaction was finished, the product was poured into 300 ml of methanol, and a black precipitate was produced. After centrifugation, the lower precipitate was collected, washed with methanol several times, and dried in a vacuum oven at 50 °C to obtain a black powdery solid, which was the target product polymethacrylic acid-modified graphene nanobelts.

[0044] The polymethacrylic acid modified graph...

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Abstract

The invention relates to a preparation method of modified polymethyl-methacrylate graphene nanoribbon (PMMA-GNR). The preparation method comprises the following steps of: longitudinally cutting a multi-walled carbon nanotube through oxidation to prepare the GNR, and dispersing the GNR on N, N- dimethyl formamide to obtain a dispersion liquid of the GNR; adding PMMA and azodiisobutyronitrile into the dispersion liquid and then performing a heating reaction on the mixed liquid; and pouring products into methyl alcohol, and performing the procedures of centrifuging, washing and vacuum drying on the mixed liquid to obtain the graphene-enhanced PMMA composition. Compared with that of a PMMA body, the tensile strength of the PMMA composition, namely the modified GNR with the 0.5% of PMMA, is improved by 78.5%, and the Young modulus of the PMMA composition is improved by 111%, so that the mechanical property of the composite material is improved remarkably.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material, in particular to a preparation method of a polymethyl methacrylate modified graphene nanoribbon (PMMA-GNR). Background technique [0002] Carbon nanotubes are seamless hollow nanoscale tubular structures formed by curling single or multilayer graphite planes. In recent years, it has attracted much attention due to its excellent thermal, electrical, and mechanical properties, and has become a hot spot of scientific research. Among them, based on the ultra-high tensile strength, Young's modulus and extremely low density of carbon nanotubes, it is a practical method to prepare carbon nanotube-polymer composites to improve the mechanical properties of materials. At present, a variety of carbon nanotube composite materials have been successfully prepared and applied in various fields. However, the surface of carbon nanotubes is smooth and lacks functional groups, so that they canno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/14C01B31/04C08L51/10C01B32/16
Inventor 王佳良史子兴印杰
Owner SHANGHAI JIAO TONG UNIV
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