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Graphene modified poly-methyl methacrylate composite and preparation method thereof

A polymethyl methacrylate and graphene modification technology, applied in the field of nanocomposite materials and their preparation, can solve problems such as poor compatibility between graphene and polymers

Inactive Publication Date: 2012-04-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method does not solve the disadvantage of graphene's poor compatibility with polymers

Method used

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  • Graphene modified poly-methyl methacrylate composite and preparation method thereof
  • Graphene modified poly-methyl methacrylate composite and preparation method thereof
  • Graphene modified poly-methyl methacrylate composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The graphite is peeled off in 1-methyl-2-pyrrolidone by ultrasonic method, and the lower precipitate is removed by centrifugation to obtain a stable and well-dispersed graphene solution. In a 100ml three-necked flask, first add 50ml of exfoliated graphene solution (0.3mg / ml—where ml is the volume of 1-methyl-2-pyrrolidone), nitrogen protection, ultrasonic dispersion for 2 hours, and then add 3.0g of formazan Methyl acrylate, 0.0123g of azobisisobutyronitrile, magnetically stirred, and heated at 80°C for 48h. After the reaction, the product was poured into 300ml of methanol, and a black precipitate was produced. After centrifugation, the lower precipitate was collected, washed with tetrahydrofuran several times, and dried in a vacuum oven at 50°C to obtain a black powdery solid, which was the target product graphene-modified polymethyl methacrylate.

[0024] The graphene-modified polymethyl methacrylate compound that the present embodiment prepares gained, its structura...

Embodiment 2

[0030] In a 100ml three-neck flask, first add 50ml of exfoliated graphene solution (0.3mg / ml), nitrogen protection, ultrasonic dispersion for 2h, then add 1.5g of methyl methacrylate, 0.0123g of azobisisobutyronitrile, and magnetically stir , 70 ° C heating reaction 48h. After the reaction, the product was poured into 300ml of methanol, and a black precipitate was produced. After centrifugation, the lower precipitate was collected, washed with tetrahydrofuran several times, and the product was dried in a vacuum oven at 50°C to obtain a black powdery solid, which was the target product graphene-modified polymethyl methacrylate.

[0031] The graphene-modified polymethyl methacrylate compound that the present embodiment prepares gained, its structural formula is:

[0032]

[0033] Wherein: n is the polymerization degree, and its value ranges from 300 to 500, and m is the modification rate, and its value ranges from 10 to 50 / 500 carbon atoms.

[0034] The thermogravimetric an...

Embodiment 3

[0036] In a 100ml three-necked flask, first add 50ml of exfoliated graphene solution (0.3mg / ml), nitrogen protection, ultrasonic dispersion for 2h, then add 2.25g of methyl methacrylate, 0.0123g of azobisisobutyronitrile, magnetic stirring , 80 ° C heating reaction 48h. After the reaction, the product was poured into 300ml 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 graphene-modified polymethyl methacrylate.

[0037] The graphene-modified polymethyl methacrylate compound that the present embodiment prepares gained, its structural formula is:

[0038]

[0039] Wherein: n is the polymerization degree, and its value ranges from 300 to 500, and m is the modification rate, and its value ranges from 10 to 50 / 500 carbon atoms.

[0040] The thermogravimetric analysis data of present e...

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Abstract

The invention relates to a graphene modified poly-methyl methacrylate composite and preparation method thereof, wherein the method comprises the following steps: stripping graphite from 1-methyl-2-pyrrolidone by solvent ultrasonic method and preparing grapheme solution, and adding methymethacrylate and azodiisobutyronitrile and heating them, and reacting them; pouring the product into methanol, and sequentially centrifuging, washing and vacuum drying it to obtain graphene enhanced poly-methyl methacrylate composite. The 0.5% graphene enhanced poly-methyl methacrylate composite synthetized by one-step method in the invention, wherein the tensile strength is 115% higher than the pure poly-methyl methacrylate polymer, and Young modulus is raised by 221%, and excellent mechanical property is revealed. The thermogravimetric analysis displays shows that in comparison with the poly-methyl methacrylate, the temperature for the graphene enhanced poly-methyl methacrylate composite material comprising 0.5% of the invention when the thermogravimetric loss reaches 10% is raised by about 30 degrees centigrade, which means the composite material prepared by the invention has higher heat stability.

Description

technical field [0001] The invention relates to a nanocomposite material and a preparation method thereof, in particular to a graphene-modified polymethyl methacrylate composite and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional sheet structure composed of carbon atoms arranged in a honeycomb shape. In recent years, graphene has attracted extensive attention due to its unique structural features and excellent physical and chemical properties. Among them, introducing graphene into the polymer matrix to prepare nanocomposite materials can significantly improve the comprehensive performance of the material. At present, the following methods are mainly used to prepare graphene / polymer nanocomposites: first, graphene oxide is used as raw material, and oxygen-containing groups are removed by reduction to obtain graphene, and then graphene is filled into the polymer by physical blending or chemical methods. matrix. Since the graphene ob...

Claims

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Application Information

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IPC IPC(8): C08L33/12C08K3/04C08F120/14C08F2/44
Inventor 王彦王佳良史子兴印杰
Owner SHANGHAI JIAO TONG UNIV
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