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Graphene-modified high-strength conductive polypropylene particles and preparation method thereof

A graphene modification and polypropylene technology, applied in the field of polymer materials, can solve problems such as affecting mechanical properties, increasing raw material costs, and reducing mechanical properties of plastics, and achieving the effects of improving mechanical properties and improving electrical conductivity.

Active Publication Date: 2013-09-18
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conductive fillers are mainly metal fibers, metal powders, carbon fibers or carbon black, and the addition of these fillers is generally high to produce excellent electrical conductivity, which not only greatly increases the cost of raw materials, but more importantly, the filler dispersion effect is not good
When the addition amount is high, it affects the original mechanical properties of the plastic matrix, and the mechanical properties of the plastic are greatly reduced.

Method used

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  • Graphene-modified high-strength conductive polypropylene particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Pretreatment of single-layer graphene: Dissolving single-layer graphene with a thickness of 1nm in ethanol, the weight ratio of ethanol to graphene is 10, high-speed stirring, stirring speed is 150rpm, and it is placed in the ultrasonic pool while stirring, The ultrasonic frequency is 30KHz, and after ultrasonic dispersion for 20 minutes, the uniformly dispersed graphene is dried in an oven at 90°C for 24 hours, and the ethanol solution attached to the graphene is removed for later use.

[0033] 100 parts of homopolypropylene particles with an isotacticity of 60% and a molecular weight of 100,000-300,000, 0.1 part of pretreated single-layer graphene, 0.01 part of 2,6-tertiary butyl-4-methylphenol, Add 0.1 part of methyl terephthalate, 1 part of hydroxybenzophenone, and 1 part of 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. Dry for 10 hours. The mixed mat...

Embodiment 2

[0035] Pretreatment of single-layer graphene: Dissolve single-layer graphene with a thickness of 25nm in ethanol, the weight ratio of ethanol to graphene is 25, stir at a high speed, the stirring speed is 200rpm, place it in the ultrasonic pool while stirring, The ultrasonic frequency is 32KHz, and after ultrasonic dispersion for 30 minutes, place the uniformly dispersed graphene in an oven at 100°C and dry for 16 hours, remove the ethanol solution attached to the graphene, and set aside.

[0036] 100 parts of homopolypropylene particles with an isotacticity of 65% and a molecular weight of 100,000-300,000, 0.5 parts of pretreated single-layer graphene, 0.1 part of diphenylamine, 1 part of trioctyl trimellitate, 2 parts Hydroxybenzotriazole, 2 parts of calcium stearate and 5 parts of calcium carbonate were added into a high-speed mixer and mixed evenly at a mixing temperature of 110°C for 8 minutes, and then dried in a vacuum oven at 110°C for 12 hours. The mixed material is s...

Embodiment 3

[0038] Pretreatment of single-layer graphene: the single-layer graphene with a thickness of 50nm is dissolved in ethanol, the weight ratio of ethanol to graphene is 50, high-speed stirring, the stirring speed is 300rpm, and it is placed in the ultrasonic pool while stirring, The ultrasonic frequency is 35KHz, and after ultrasonic dispersion for 40 minutes, the uniformly dispersed graphene is dried in an oven at 120°C for 8 hours to remove the ethanol solution attached to the graphene and set aside.

[0039] 100 parts of homopolypropylene particles with an isotacticity of 70% and a molecular weight of 100,000-300,000, 2 parts of pretreated single-layer graphene, 0.2 parts of 3,5-tertiary butyl-4-hydroxyphenylsulfide Add ether, 2 parts of trihexyl trimellitate, 4 parts of salicylic acid, 3 parts of zinc stearate and 10 parts of talcum powder into a high-speed mixer and mix evenly. The mixing temperature is 120°C and the mixing time is 10 minutes. Dry in a vacuum oven at 110°C fo...

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Abstract

The invention belongs to the technical field of high-molecular materials, and discloses graphene-modified high-strength conductive polypropylene particles and a preparation method thereof. The polypropylene particles are prepared from the following components, by weight, 100 parts of polypropylene particles, 0.1-20 parts of single-layer graphene, 0.01-1 part of an antioxidant, 0.1-10 parts of a plasticizer, 1-10 parts of a photo-stabilizer, 1-10 parts of a lubricant, and 0-40 parts of a filling material. The preparation method comprises the steps that: 100 parts of polypropylene particles, 0.1-20 parts of pretreated single-layer graphene, 0.01-1 part of antioxidant, 0.1-10 parts of plasticizer, 1-10 parts of photo-stabilizer, 1-10 parts of lubricant, and 0-40 parts of filling material are well mixed in a high-speed mixer; the mixture is bake-dried in a vacuum baking oven; the dried material is delivered into a double-screw extruder through a metering pump and is subjected to melt-kneading; and the material is extruded and granulated by using a die head, such that the graphene-modified high-strength conductive polypropylene particles are obtained. The polypropylene particles provided by the invention have the advantages of high strength, high conductivity, and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to graphene-modified high-strength conductive polypropylene particles 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, its conductivity is extremely poor, and it is prone to electrostatic hazards during use, which limits the application of polypropylene in electronics, medical and other fields. [0003] At present, conductive plastics are mainly composed of plastics as the matrix and conductive fillers. Conductive fillers are mainly metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/06C08K9/00C08K3/04B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 方伟宇
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD