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

A technology of polyester composite material and carbon fiber is applied in the field of carbon fiber reinforced polyester composite material and its preparation. Enhanced interfacial and mechanical properties, improved thermal stability

Active Publication Date: 2019-11-29
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This shows that vacuum heat treatment will promote the reduction of reactive groups on carbon fibers, and it is not conducive to the combination with the thermoplastic resin matrix interface with low reactivity.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of preparation method of carbon fiber reinforced polyester composite material, its steps are as follows:

[0044] (1) Polyacrylonitrile-based carbon fibers and polybutylene terephthalate coated with an epoxy resin sizing agent with an average length of 10 μm were dried at 100° C. for 2 hours so that their water content was 0.019 wt %;

[0045] (2) Polyacrylonitrile-based carbon fibers coated with epoxy resin sizing agent on the surface were kept warm for 10 minutes in an oxidative atmosphere of 280 ° C, and the oxidative atmosphere was air environment;

[0046] (3) Add the carbon fiber treated in step (1) through the fiber port of the twin-screw extruder, polybutylene terephthalate, tetrakis[β-(3,5-di-tert-butyl-4-hydroxybenzene Base) the mixture of propionic acid] pentaerythritol ester and zinc stearate is added from the twin-screw extruder hopper, extruded to obtain carbon fiber reinforced polyester composite material, wherein the polyacrylonitrile-based carbon...

Embodiment 2

[0053] A kind of preparation method of carbon fiber reinforced polyester composite material, its steps are as follows:

[0054] (1) Petroleum pitch-based carbon fibers and polyethylene terephthalate coated with lactone-modified epoxy resin sizing agent with an average length of 3 mm were dried at 150 ° C for 6 h so that the water content was 0.01 wt % ;

[0055] (2) Insulate the petroleum pitch-based carbon fiber whose surface is coated with caprolactone-modified epoxy resin sizing agent in an oxidative atmosphere of 250°C for 0.5min, and the oxidative atmosphere is a nitrogen dioxide environment;

[0056](3) Add the carbon fiber treated in step (1) through the fiber port of the twin-screw extruder, polyethylene terephthalate, N,N'-bis-(3-(3,5-di-tert-butyl The mixture of 4-hydroxyphenyl)propionyl)hexamethylenediamine and ethylene bis fatty acid amide is added from the hopper of a twin-screw extruder, and extruded to obtain a carbon fiber reinforced polyester composite materi...

Embodiment 3

[0060] A kind of preparation method of carbon fiber reinforced polyester composite material, its steps are as follows:

[0061] (1) Coal tar pitch-based carbon fibers and polybutylene terephthalate coated with an ethylenically unsaturated polyester resin sizing agent with an average length of 100 μm were dried at 125° C. for 4 hours so that their water content was 0.015 wt %;

[0062] (2) Insulate the coal tar pitch-based carbon fiber coated with vinyl unsaturated polyester resin sizing agent for 15 minutes in an oxidative atmosphere at 350° C., and the oxidative atmosphere is a chlorine gas environment;

[0063] (3) Add the carbon fiber treated in step (1) through the fiberizing port of the twin-screw extruder, polybutylene terephthalate, tris[2,4-di-tert-butylphenyl]phosphite and ethylene - The mixture of acrylic acid copolymers is added from the hopper of the twin-screw extruder, and extruded to obtain carbon fiber reinforced polyester composite materials, in which coal tar...

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Abstract

The invention relates to a carbon fiber reinforced polyester composite material and a preparation method thereof. The preparation method comprises the following steps: performing heat preservation oncarbon fiber coated with a thermosetting resin sizing agent at 250-350 DEG C for 0.5-15 minutes, then adding low-temperature heat-treated carbon fiber from a fiber feeding hole of a twin-screw extruder, adding a mixture of thermoplastic polyester, an antioxidant and a lubricant from a twin-screw extruder hopper, and extruding to obtain the carbon fiber reinforced polyester composite material withtensile strength of 160-220 MPa and bending strength of 240-290 MPa, wherein the mass ratio of the carbon fiber coated with the thermosetting resin sizing agent to thermoplastic polyester to the antioxidant to the lubricant is (20-40):(60-80):(0.1-0.3):(0.1-0.5). The preparation method has low heat treatment temperature and low energy consumption, the surface of the carbon fiber after treatment isrich in carboxyl groups which can react with thermoplastic polyester, which is beneficial to chemical bonding with thermoplastic polyester, and thus the carbon fiber reinforced polyester composite material has a great application prospect.

Description

technical field [0001] The invention belongs to the field of carbon fiber composite material preparation, and relates to a carbon fiber reinforced polyester composite material and a preparation method thereof. Background technique [0002] Polyester is a general term for polymers obtained by polycondensation of polyols and polybasic acids, mainly referring to linear thermoplastic resins such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). It has high melting point, high toughness, excellent heat resistance, electrical resistance and dimensional stability, and is widely used in textiles, automobiles and electronic appliances. [0003] Carbon fiber (CF) has the characteristics of high strength, high modulus, good thermal conductivity, thermal stability, fatigue resistance and creep resistance, so it is often used as a reinforcing agent for polymers and is the first choice for other glass fiber reinforced composite materials. Incomparable, it is widel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K9/10C08K7/06C08K5/134C08K5/20C08K5/526C08J5/06
CPCC08J5/06C08J2367/02C08K5/1345C08K5/20C08K5/526C08K7/06C08K9/10
Inventor 吕永根姚莉丽李胜霞张锦财郭玉花
Owner DONGHUA UNIV
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