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A kind of antistatic composite material and preparation method thereof

A composite material and antistatic technology, applied in the field of antistatic composite material and its preparation, can solve the problems of poor heat resistance, environmental stress sensitivity, difficult to eliminate, etc., to improve adhesion and dispersibility, and strengthen antistatic performance. , the effect of improving electrical conductivity

Inactive Publication Date: 2021-03-16
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most composite materials have high electrical resistance, and once the material has accumulated static electricity, it is difficult to eliminate
The generation of static electricity brings certain dangers in the production, processing and use of composite materials. For example, plastics absorb dust due to electrostatic attraction during the preparation process, which affects the quality of plastics, and precision instruments are distorted due to static electricity, etc.
[0003] Most of today's antistatic composite materials have only one polymer matrix, such as polyethylene (PE), which has good chemical stability, excellent low temperature resistance, excellent electrical insulation performance, and low water absorption, but polyethylene (PE) Poor heat resistance, sensitive to environmental stress
Cracking will occur under certain environmental factors (such as temperature, humidity, atmosphere, liquid medium) and stress, and the antistatic performance needs to be further improved

Method used

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Examples

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Effect test

preparation example Construction

[0050] The present invention also provides a kind of preparation method of antistatic composite material, comprises the following steps:

[0051] 1) In parts by weight, 50-60 parts of the mixture of ethylene-vinyl acetate copolymer and polyethylene, 0.2-0.4 parts of antioxidant and 0.1-0.3 parts of lubricant are premixed;

[0052] 2) After the premix is ​​finished, add 2.6 to 3.2 parts of conductive fillers, carry out mixing and tableting, and obtain antistatic composite materials;

[0053] The conductive filler is carbon black and carbon fiber with polypyrrole deposited on the surface.

[0054] In the present invention, the types, amounts and sources of the raw materials are the same as those described above, and will not be repeated here.

[0055] In the present invention, the temperature of the premix is ​​preferably 160 to 165°C; the time of the premix is ​​preferably 10 to 15min; the present invention preferably uses a double-roller shaft mill to carry out the premix, so...

Embodiment 1

[0065] The preparation method of antistatic polyethylene-vinyl acetate (PEVA) material, described method comprises the following steps:

[0066] A. Soak the carbon fibers in acetone for 30 minutes, dry them in an oven at 65°C, mix 65% concentrated nitric acid and carbon fibers at a mass ratio of 5:1, disperse them ultrasonically for 30 minutes, then boil them under reflux for 3 hours, take them out and wash them with distilled water until neutral ;

[0067] B, put the acid-treated carbon fiber in step A into 2.5mL of 0.1mol / L ammonium persulfate solution and soak for 8h, take out the carbon fiber from the ammonium persulfate solution, put it into 30mL of pyrrole-containing hydrochloric acid solution, and at a temperature of In-situ deposition at 0°C for 2 hours, ultrasonic cleaning for 30 minutes after deposition, to remove excess polypyrrole and pyrrole monomer;

[0068] C. Weigh polyethylene (PE) and ethylene-vinyl acetate copolymer (EVA), and mix 50 parts of the mixture ac...

Embodiment 2

[0073] The preparation method of antistatic polyethylene-vinyl acetate (PEVA) material, described method comprises the following steps:

[0074] A. Soak the carbon fibers in acetone for 30 minutes, dry them in an oven at 65°C, mix 65% concentrated nitric acid and carbon fibers at a mass ratio of 5:1, disperse them ultrasonically for 30 minutes, then boil them under reflux for 3 hours, take them out and wash them with distilled water until neutral ;

[0075] B, put the acid-treated carbon fiber in step A into 2.5mL of 0.1mol / L ammonium persulfate solution and soak for 8h, take out the carbon fiber from the ammonium persulfate solution, put it into 30mL of pyrrole-containing hydrochloric acid solution, and at a temperature of In-situ deposition at 0°C for 2 hours, ultrasonic cleaning for 30 minutes after deposition, to remove excess polypyrrole and pyrrole monomer;

[0076] C. Weigh polyethylene (PE) and ethylene-vinyl acetate copolymer (EVA), and mix it into 60 parts of mixtur...

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Abstract

The invention provides an anti-static composite material, which is prepared from the following ingredients in parts by weight: 50 to 60 parts of ethylene-vinyl acetate copolymer and polyethylene mixtures, 2.6 to 3.2 parts of conduction filling materials, 0.2 to 0.4 part of antioxidants and 0.1 to 0.3 part of lubricating agents. The conduction filling materials are carbon black and carbon fiber with polypyrrole deposited onto the surface. The anti-static composite material provided by the invention has better anti-static performance and environment stress crack resistance. The invention also provides a preparation method of the anti-static composite material.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an antistatic composite material and a preparation method thereof. Background technique [0002] Static electricity refers to the separation of two substances after contact, and the substances have an excess positive or negative charge than before contact. Most composite materials have high electrical resistance, and once a material has accumulated static electricity, it is difficult to eliminate. The generation of static electricity brings certain dangers in the production, processing and use of composite materials. For example, plastics absorb dust due to electrostatic attraction during the preparation process, which affects the quality of plastics, and precision instruments are distorted due to static electricity. [0003] Most of today's antistatic composite materials have only one polymer matrix, such as polyethylene (PE), which has good chemical stabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K9/04C08K7/06C08K3/04C08K5/098
CPCC08K2201/001C08K2201/004C08L23/06C08L2201/04C08L23/0853C08K13/06C08K9/04C08K7/06C08K3/04C08K5/098
Inventor 易国斌唐子伦冯明晖
Owner GUANGDONG UNIV OF TECH