Waste-carbon-fiber-reinforced polybutylene terephthalate composite material and preparation method thereof

A technology of polybutylene terephthalate and composite materials, which is applied in the field of improving the interface performance between fibers and substrates, can solve the problems of expensive carbon fibers, etc., and achieve good market prospects, high toughness, and good conductivity Effect

Inactive Publication Date: 2012-12-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that carbon fiber is expensive in the current market, by using carbon fiber waste silk obtained from recycled waste resin-based carbon fiber composite materials as a reinforcing material for polybutylene terephthalate, thereby providing a High strength and high modulus, heat resistance, high dimensional stability, creep resistance, antistatic carbon fiber waste silk reinforced polybutylene terephthalate composite material

Method used

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  • Waste-carbon-fiber-reinforced polybutylene terephthalate composite material and preparation method thereof
  • Waste-carbon-fiber-reinforced polybutylene terephthalate composite material and preparation method thereof
  • Waste-carbon-fiber-reinforced polybutylene terephthalate composite material and preparation method thereof

Examples

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Effect test

example 1

[0027] First put the carbon fiber waste silk in a nitric acid solution with a mass percentage concentration of 37% for 2 hours, then wash it with clean water, and then put the carbon fiber waste silk in an epoxy resin solution with a mass percentage concentration of 3 wt.% for 5 hours. Hours, the solvent is a solution of water and ethanol with a volume ratio of 1:1. After the epoxy resin is fully adsorbed on the carbon fiber, it is then fully dried in a vacuum oven at 90°C. Weigh polybutylene terephthalate, carbon fiber waste, toughening agent, and antioxidant according to the following mass percentages.

[0028]

[0029] The polybutylene terephthalate, the toughening agent and the antioxidant are placed in the mixer and mixed evenly, and then the mixed materials are fed into the twin-screw extruder through a hopper. At the same time, the carbon fiber waste after surface treatment is fed from the exhaust port located in the middle of the barrel through a side feeding device...

example 2

[0031] First put the carbon fiber waste silk in a nitric acid solution with a mass percentage concentration of 37% for 2 hours, then wash it with clean water, and then put the carbon fiber waste silk in an epoxy resin solution with a mass percentage concentration of 3 wt.% for 5 hours. Hours, the solvent is a solution of water and ethanol with a volume ratio of 1:1. After the epoxy resin is fully adsorbed on the carbon fiber, it is then fully dried in a vacuum oven at 90°C. Weigh polybutylene terephthalate, carbon fiber waste, toughening agent, and antioxidant according to the following mass percentages.

[0032]

[0033] Put the weighed polybutylene terephthalate, toughening agent and antioxidant in the mixer and mix evenly, then feed the mixed materials into the twin-screw extruder through the hopper. At the same time, the carbon fiber waste after surface treatment is fed from the exhaust port located in the middle of the barrel through a side feeding device equipped with...

example 3

[0035] First put the carbon fiber waste silk in a nitric acid solution with a mass percentage concentration of 37% for 2 hours, then wash it with clean water, and then put the carbon fiber waste silk in an epoxy resin solution with a mass percentage concentration of 3 wt.% for 5 hours. Hours, the solvent is a solution of water and ethanol with a volume ratio of 1:1. After the epoxy resin is fully adsorbed on the carbon fiber, it is then fully dried in a vacuum oven at 90°C. Weigh polybutylene terephthalate, carbon fiber waste, toughening agent, and antioxidant according to the following mass percentages.

[0036]

[0037] The polybutylene terephthalate, the toughening agent and the antioxidant are placed in the mixer and mixed evenly, and then the mixed materials are fed into the twin-screw extruder through a hopper. At the same time, the carbon fiber waste after surface treatment is fed from the exhaust port located in the middle of the barrel through a side feeding device...

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Abstract

The invention relates to a waste-carbon-fiber-reinforced polybutylene terephthalate composite material and a preparation method thereof, belonging to the field of polymer-base composite material. The composite material is prepared from 65.0-90.0 wt.% of reinforced polybutylene terephthalate, 5.0-30 wt.% of waste carbon fiber subjected to surface treatment, 0.1-0.3 wt.% of antioxidant and 3.0-8.0 wt.% of toughener. The preparation method comprises the following steps: cleaning the surface of waste carbon fibers, activating and drying; adding the waste carbon fibers into a double screw extruder through a side feed port; carrying out melt blending extrusion on the waste carbon fibers with polybutylene terephthalate, a toughener and an antioxidant by using the double screw extruder; and drawing the extruded melt, cooling with water, screening, granulating and drying. The composite material has the characteristics of high strength, high modulus, high toughness, high heat deformation temperature, favorable heat resistance, favorable static resistance, wear resistance and creep resistance; and the product has the advantages high cost performance and simple preparation method, and can be widely used in the fields of electronic and electric parts, automobile accessories, household appliances and the like.

Description

technical field [0001] The invention belongs to the field of polymer-based composite materials and their molding processing, in particular to a carbon fiber waste silk reinforced polybutylene terephthalate (PBT) composite material and its preparation method, in particular to a carbon fiber waste silk surface Processing technology, a method to improve the interface properties between the fiber and the matrix. The invention can obtain a high-performance composite material with high strength, high modulus, high toughness, high thermal deformation temperature, high wear resistance, creep resistance and antistatic properties. The carbon fiber reinforced material adopted in the invention is recycled carbon fiber waste silk, which can significantly reduce the cost of raw materials, and the prepared composite material has excellent performance and simple processing technology, showing good economic benefits and application prospects. Background technique [0002] Polybutylene terep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/06C08L51/00C08K9/10C08K9/06C08K9/02C08K7/06B29B9/06B29B13/06
Inventor 汪晓东陈勇武德珍
Owner BEIJING UNIV OF CHEM TECH
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