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A kind of carbon fiber reinforced polypropylene composite material and preparation method thereof

A composite material and carbon fiber technology, applied in the field of carbon fiber, can solve the problems of inability to withstand polypropylene processing temperature and poor mechanical properties, achieve high comprehensive mechanical properties, increase physical entanglement, and enhance the effect of interfacial bonding

Active Publication Date: 2022-07-15
QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, commercialized carbon fibers are mainly used to reinforce thermosetting composite materials. The sizing agent is mainly epoxy, but the epoxy sizing agent will self-crosslink when the temperature exceeds 120°C, and cannot withstand the processing temperature of polypropylene, so it cannot be used with polypropylene. Propylene forms a good interface
At present, the sizing agent used on polypropylene is mainly polyurethane, but ordinary polyurethane cannot form chemical bonds with polypropylene, and the mechanical properties of carbon fiber reinforced polypropylene prepared are poor

Method used

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  • A kind of carbon fiber reinforced polypropylene composite material and preparation method thereof
  • A kind of carbon fiber reinforced polypropylene composite material and preparation method thereof
  • A kind of carbon fiber reinforced polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw materials for the preparation of carbon fiber reinforced polypropylene composite materials are composed of the following parts by mass:

[0024]

[0025] Electrochemical surface treatment is carried out on the carbon fiber, and some -COOH and -OH are introduced on the surface of the carbon fiber to improve the surface activity of the carbon fiber; and then it is immersed in the sizing agent liquid.

[0026] After mixing polypropylene, compatibilizer and initiator at high speed in a high-speed machine for 5 minutes, it is placed in the main feeding barrel of a twin-screw extruder, and then the modified carbon fiber enters from the fiber inlet, and then passes through the twin-screw machine. Granulation, wherein the temperature of the first zone of the screw machine is 200 °C, the temperature of the second zone is 205 °C, the temperature of the third zone is 210 °C, the temperature of the fourth zone is 215 °C, the temperature of the fifth zone is 220 °C, the te...

Embodiment 2

[0028] The raw materials for the preparation of carbon fiber reinforced polypropylene composite materials are composed of the following parts by mass:

[0029]

[0030] Electrochemical surface treatment is carried out on the carbon fiber, and some -COOH and -OH are introduced on the surface of the carbon fiber to improve the surface activity of the carbon fiber; and then it is immersed in the sizing agent liquid.

[0031] After mixing polypropylene, compatibilizer and initiator at high speed in a high-speed machine for 5 minutes, it is placed in the main feeding barrel of a twin-screw extruder, and the carbon fiber is fed into the fiber inlet, and then granulated by a twin-screw machine. Among them, the temperature of the first zone of the screw machine is 210°C, the temperature of the second zone is 210°C, the temperature of the third zone is 215°C, the temperature of the fourth zone is 220°C, the temperature of the fifth zone is 225°C, the temperature of the sixth zone is ...

Embodiment 3

[0033] The raw materials for the preparation of carbon fiber reinforced polypropylene composite materials are composed of the following parts by mass:

[0034]

[0035] Electrochemical surface treatment is carried out on the carbon fiber, and some -COOH and -OH are introduced on the surface of the carbon fiber to improve the surface activity of the carbon fiber; and then it is immersed in the sizing agent liquid.

[0036] After mixing polypropylene, modifier and compatibilizer in a high-speed machine for 5 minutes at high speed, place it in the main feeding barrel of a twin-screw extruder, and then feed the carbon fiber through the fiber inlet, and then pass through the twin-screw machine for granulation , the temperature of the first zone of the screw machine is 205°C, the temperature of the second zone is 207°C, the temperature of the third zone is 213°C, the temperature of the fourth zone is 218°C, the temperature of the fifth zone is 223°C, the temperature of the sixth z...

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Abstract

The invention discloses a carbon fiber reinforced polypropylene composite material and a preparation method thereof. The raw material of the carbon fiber reinforced polypropylene composite material comprises 41-96 parts by mass of polypropylene, 1-40 parts of carbon fiber, 1-8 parts of sizing agent, 1-10 parts of compatibilizer and 0.5-1 part of initiator. The sizing agent contains a prepolymer containing unsaturated double bonds and hydroxyl groups and an isocyanate curing agent. The sizing agent used in the present invention can enhance the interface bonding effect of carbon fiber and polypropylene through the action of chemical bonds, so that it has higher comprehensive mechanical properties.

Description

technical field [0001] The invention relates to the technical field of carbon fibers, in particular to a carbon fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] Carbon fiber (CF for short) is a new type of fiber material with high strength and high modulus fiber with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by carbonization and graphitization by stacking organic fibers such as flake graphite microcrystals along the fiber axial direction. Carbon fiber is "soft on the outside and rigid on the inside", which is lighter than metal aluminum, but stronger than steel, and has the characteristics of corrosion resistance and high modulus. It is an important material in national defense, military industry and civilian use. [0003] Because carbon fiber has the advantages of high strength, low density, high temperature resistance, water resistance and corrosion resistance, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08K7/06C08K9/00C08K9/04C08J5/06
CPCC08J5/06C08J2323/12C08J2451/06C08K7/06C08K9/00C08K9/08
Inventor 陈登龙柯俊沐郭振雄刘畅吴健健陈明鹏
Owner QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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