Carbon fiber reinforced composite material and preparation method thereof

A technology for reinforcing composite materials and composite materials, which is applied in the field of carbon fiber reinforced polypropylene composite materials and its preparation, can solve the problems of difficulty in controlling fiber length, large differences in particle properties, cumbersome carbon fiber process, etc., and achieves low cost, excellent mechanical properties, high intensity effect

Inactive Publication Date: 2018-09-21
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of extracting carbon fiber from CFRP is cumbersome and has many impurities
The publication number is CN105199234, which discloses "a carbon fiber reinforced polypropylene composite material and its preparation method". Although the production process is simple and convenient, it is difficult to control the fiber length because the carbon fiber is cut of

Method used

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  • Carbon fiber reinforced composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 40 parts of chopped carbon fibers treated by liquid phase oxidation method in an internal mixer, and add 1 part of silane coupling agent KH550 to conduct carbon fiber surface treatment.

[0027] (2) Weigh 80 parts of polypropylene, 22 parts of low-density polyethylene, 10 parts of calcium carbonate, 2 parts of paraffin, and 10 parts of magnesium hydroxide and mix them evenly in the internal mixer; the three-stage internal mixing temperature of the internal mixer is set to 210 ℃, screw speed of 10r / min, banburying time of 20min.

[0028] (3) The uniformly mixed material is taken out and put into a hot press template, heated and pressurized, cooled and cooled, and finally solidified and molded to obtain a carbon fiber reinforced composite material. The molding temperature of the hot press was 200 °C, the holding time was 10 min, and the cooling temperature was 60 °C to take out the composite material.

Embodiment 2

[0030] (1) Weigh 35 parts of chopped carbon fiber treated by liquid phase oxidation method in an internal mixer, add 0.5 part of silane coupling agent KH560 to carry out carbon fiber surface treatment.

[0031] (2) take by weighing 70 parts of polypropylene, 10 parts of EVA, 5 parts of PA6, 10 parts of calcium carbonate, 1 part of paraffin wax, 5 parts of magnesium hydroxide and mix them in the internal mixer; the three-stage internal mixing temperature of the internal mixer is set The temperature is 190°C, the screw speed is 10r / min, and the mixing time is 15min.

[0032] (3) The uniformly mixed material is taken out and put into a hot press template, heated and pressurized, cooled and cooled, and finally solidified and molded to obtain a carbon fiber reinforced composite material. The molding temperature of the hot press was 190 °C, the holding time was 10 min, and the cooling temperature reached 50 °C to take out the composite material.

Embodiment 3

[0034] (1) Weigh 30 parts of chopped carbon fibers treated by liquid phase oxidation method in an internal mixer, and add 0.1 part of silane coupling agent TPPP for surface treatment of carbon fibers.

[0035] (2) Weigh 60 parts of polypropylene, 15 parts of low-density polyethylene, 8 parts of calcium carbonate, 4 parts of methyl silicone oil, and 15 parts of magnesium hydroxide and mix them evenly in an internal mixer; The setting is 200°C, the screw speed is 10r / min, and the mixing time is 15min.

[0036] (3) The uniformly mixed material is taken out and put into a hot press template, heated and pressurized, cooled and cooled, and finally solidified and molded to obtain a carbon fiber reinforced composite material. The molding temperature of the hot press was 200 °C, the holding time was 13 min, and the cooling temperature was 40 °C to take out the composite material.

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Abstract

The invention discloses a carbon fiber reinforced composite material. The composite material is prepared from, by weight, 10-40 parts of short carbon fibers, 40-60 parts of polypropylene, 10-30 partsof compatilizer, 0.1-4 parts of surface treating agent, 5-15 parts of modifying agent, 1-5 parts of lubricating agent and 5-20 parts of fire retardant. Compared with the prior art, by adding the different compatilizer, the short carbon fibers which are treated through liquid state oxidation, and other auxiliary modifiers, the carbon fiber reinforced composite material is prepared, through the formula, the intermolecular binding force can be increased to promote binding of polymers, and then the blends are high in strength, high in mechanical property, low in cost, environmentally friendly andhigh in flame retardant property. The composite material can be used for parts of a car, various indexes are higher than those of existing parts, the security coefficient of the car can be greatly improved, and the composite material is wide in market development prospect.

Description

technical field [0001] The invention belongs to the field of composite material modification, and particularly relates to a carbon fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] Carbon fiber is a high-strength, high-modulus fiber with a carbon content of more than 90% and many excellent properties such as high temperature resistance, friction resistance, electrical conductivity, thermal conductivity, corrosion resistance, heat transfer and small thermal expansion coefficient. It has the characteristics of ordinary carbon materials, but different from ordinary carbon materials, its shape has significant anisotropy and softness; it shows high strength along the fiber axis, and the specific gravity of carbon fiber is small, so it has a high specific gravity. strength. It is prepared by pre-oxidation, carbonization, graphitization and other high-temperature processes to remove all elements except carbon from raw...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L53/00C08L23/06C08L23/16C08L23/08C08L77/02C08L75/04C08K9/02C08K9/06C08K7/06C08K3/22C08K3/26C08J5/06
CPCC08J5/06C08J2323/12C08J2353/00C08J2423/06C08J2423/08C08J2423/16C08J2475/04C08J2477/02C08K3/22C08K7/06C08K9/02C08K9/06C08K2003/2224C08K2003/265C08K2201/004
Inventor 王昆彦高宇含王益斌李丹丹
Owner JINLING INST OF TECH
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