Grapheme modified polypropylene master batch and preparation method thereof

A technology of graphene modification and polypropylene, applied in the field of polymer materials, can solve the problems of insufficient strength, affecting service life, general thermal conductivity and other problems, and achieve good thermal conductivity

Inactive Publication Date: 2014-05-28
北京纳新天地科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypropylene also has two major disadvantages. Its strength is not enough, and its thermal conductivity is average. It is easy to accumulate a large amount of heat during use, which not only affects the service life, but also limits its application range.

Method used

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  • Grapheme modified polypropylene master batch and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In parts by weight, 2 parts of graphene dry powder with a thickness of 1-2nm are placed in an electrostatic sprayer, the electrostatic output voltage is set to 10KV, the electrostatic output current is 5μA, and the powder output is controlled at 4g / min. The dry powder is sprayed on 100 parts of homopolypropylene particles with an isotacticity of 60%, a molecular weight of 100,000 to 300,000, and a particle size of 10 to 15 meshes.

[0022] In parts by weight, the obtained graphene-modified polypropylene particles, 0.01 part of 2,6-tert-butyl-4-methylphenol, 0.1 part of methyl terephthalate, 1 part of hydroxybenzophenone, 1 part Add stearic acid into a high-speed mixer and mix evenly. The mixing temperature is 100°C and the mixing time is 5 minutes, and then placed in a vacuum oven at 100°C for 10 hours. The mixed material is sent to the twin-screw extruder after passing through the metering pump. The length-to-diameter ratio is 30:1 for melting and kneading. 240° C., e...

Embodiment 2

[0024] In terms of parts by weight, place 0.5 parts of graphene dry powder with a thickness of 1 to 2 nm in an electrostatic sprayer, set the electrostatic output voltage to 15KV, the electrostatic output current to 8μA, and control the powder output at 2g / min. The dry powder is sprayed on 100 parts of homopolypropylene particles with an isotacticity of 70%, a molecular weight of 100,000 to 300,000, and a particle size of 50 to 60 mesh.

[0025] In parts by weight, the obtained graphene-modified polypropylene particles, 0.1 part of diphenylamine, 1 part of trioctyl trimellitate, 2 parts of hydroxybenzotriazole, 2 parts of calcium stearate and 5 parts of calcium carbonate were added Mix evenly in a high-speed mixer, the mixing temperature is 110°C, the mixing time is 8min, and then placed in a vacuum oven at 110°C for 12h. The mixed material is sent to the twin-screw extruder after passing through the metering pump. The length-to-diameter ratio is 50:1 for melting and kneading....

Embodiment 3

[0027] In terms of parts by weight, place 0.02 parts of graphene dry powder with a thickness of 1 to 2 nm in an electrostatic sprayer, set the electrostatic output voltage to 12KV, the electrostatic output current to 6μA, and control the powder output at 2g / min. The dry powder is sprayed on 100 parts of homopolypropylene particles with an isotacticity of 80%, a molecular weight of 100,000 to 300,000, and a particle size of 100 mesh.

[0028] In parts by weight, the obtained graphene-modified polypropylene particles, 0.2 parts of 3,5-tert-butyl-4-hydroxyphenyl sulfide, 2 parts of trihexyl trimellitate, 4 parts of salicylic acid, 3 parts 1 part of zinc stearate and 10 parts of talc powder were added to a high-speed mixer and mixed evenly at a mixing temperature of 120°C for 10 minutes, and then dried in a vacuum oven at 110°C for 14 hours. The mixed material is sent to the twin-screw extruder after passing through the metering pump. The length-to-diameter ratio is 60:1 for melti...

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Abstract

The invention provides a grapheme modified polypropylene master batch and a preparation method thereof. The grapheme modified polypropylene master batch comprises the following raw materials in parts by weight: 100 parts of polypropylene particles, 0.01 to 5 parts of grapheme dry powder, 0.01 to 1 part of an antioxidant, 0.1 to 10 parts of a plasticizer, 1 to 10 parts of a light stabilizer, 1 to 10 parts of a lubricant, and 0 to 40 parts of a filler. The preparation method comprises the following steps: performing spraying modification on the polypropylene particles through the grapheme dry powder with static electricity, uniformly mixing the modified polypropylene particles with the rest of constituents, then feeding the mixture into a double-screw extruder for fusing and mixing, and finally extruding for granulation. The method enhances the mechanical property of the polypropylene material under the condition that the heat-conducting property of the polypropylene material is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a graphene-modified polypropylene masterbatch and a preparation method thereof. Background technique [0002] Polypropylene has the advantages of non-toxic, odorless, low density, excellent moisture absorption resistance, excellent acid and alkali corrosion resistance, and excellent solubility resistance. As a common engineering plastic, it is widely used in the automotive industry, household appliances, pipes, and mechanical parts. production etc. However, polypropylene also has two major disadvantages. Its strength is not enough, and its thermal conductivity is average. It is easy to accumulate a large amount of heat during use, which not only affects its service life, but also limits its application range. [0003] With the rapid development of microelectronics integration technology, the heat dissipation of original components has increased rapidly. At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/00C08K3/04C08K13/06C08J3/22
CPCC08K13/02B29B9/06B29C48/92B29C2948/9258B29C2948/92704C08K3/04C08K2201/013C08L23/12
Inventor 王云峰李晓斐
Owner 北京纳新天地科技发展有限公司
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