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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: 2018-09-25
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Carbon fiber reinforced polyester composite material and preparation method thereof
  • Carbon fiber reinforced polyester composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0044] (1) Polyacrylonitrile-based carbon fiber and polybutylene terephthalate coated with epoxy resin sizing agent with an average length of 10μm are dried at 100°C for 2h, so that the water content is 0.019wt%;

[0045] (2) Polyacrylonitrile-based carbon fiber coated with epoxy resin sizing agent is kept at 280℃ for 10 minutes in an oxidizing atmosphere, and the oxidizing atmosphere is an air environment;

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

Embodiment 2

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

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

[0055] (2) The petroleum pitch-based carbon fiber coated with lactone-modified epoxy resin sizing agent is kept for 0.5 min in an oxidizing atmosphere at 250°C, and the oxidizing atmosphere is a nitrogen dioxide environment;

[0056] (3) The carbon fiber treated in step (1) is added through a twin-screw extruder, and the polyethylene terephthalate, N,N'-bis-(3-(3,5-di-tert-butyl) The mixture of 4-hydroxyphenyl) propionyl) hexamethylene diamine and ethylene bis-fatty amide is added from the hopper of the twin-screw extruder, and extruded to obtain a carbon fiber reinforced polyester composite material, wherein the surface is coated with a lactone mod...

Embodiment 3

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

[0061] (1) Coal pitch-based carbon fiber and polybutylene terephthalate coated with a vinyl unsaturated polyester resin sizing agent with an average length of 100 μm were dried at 125°C for 4 hours to make the water content 0.015 wt%;

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

[0063] (3) Add the carbon fiber treated in step (1) through a twin-screw extruder and add fiber port, polybutylene terephthalate, tris[2,4-di-tert-butylphenyl] phosphite and ethylene -The mixture of acrylic copolymer is added from the hopper of the twin-screw extruder, and extruded to obtain a carbon fiber reinforced polyester composite material, in which the surface is coated with coal pitch-based carbon fiber and pol...

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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 polyacids, 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, electronic appliances and other fields. [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 it is used by other glass fiber reinforced composite materials. Unmatched, it is widely used in h...

Claims

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Application Information

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Patent Type & Authority Applications(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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