PBO fiber reinforced resin-based composite material and preparation method thereof

A fiber-reinforced resin and composite material technology, which is applied in the field of PBO fiber-reinforced resin-based composite materials and their preparation, can solve the problems of limited application of PBO fibers, poor adhesion of resin matrix, etc., so as to improve high temperature resistance and high temperature resistance. The effect of lifting, high modulus properties

Pending Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The application of PBO fiber in the field of composite materials is limited due to the poor activity of the surface groups of the PBO fiber, smooth surface, inertness, and poor adhesion to the resin matrix.

Method used

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  • PBO fiber reinforced resin-based composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Heat-treat the PBO fiber at 350°C for 15s, modify the surface of the fiber after heat treatment, and pre-impregnate 30% of the PBO fiber in 70% polyimide pre-preg for 2 hours, and the pre-preg is completed Finally, the material is put into a mold and hot-pressed to form, and the hot-pressing pressure is 0.8MPa. The hot-pressing conditions are hot-pressing temperature 100° C., hot-pressing pressure 1.0 MPa, and hot-pressing time 2 hours. Prepared PBO fiber reinforced resin matrix composites.

Embodiment 2

[0021] Heat-treat the PBO fiber at 550°C for 18s, modify the surface of the fiber after heat treatment with a coupling agent, pre-impregnate 30% of the PBO fiber in 70% polyimide pre-preg for 3 hours, and the pre-preg is completed Finally, the material is put into a mold and hot-pressed, and the hot-pressing pressure is 1.0 MPa. The hot-pressing conditions are hot-pressing temperature 150° C., hot-pressing pressure 1.5 MPa, and hot-pressing time 3 hours. Prepared PBO fiber reinforced resin matrix composites.

Embodiment 3

[0023] Heat-treat the PBO fiber at 450°C for 20s, modify the surface of the fiber after heat treatment, and pre-impregnate 40% of the PBO fiber in 60% polyimide pre-preg for 4 hours, and the pre-preg is completed Finally, the material is put into a mold and hot-pressed, and the hot-pressing pressure is 2.0MPa. The hot-pressing conditions are hot-pressing temperature 200° C., hot-pressing pressure 2.0 MPa, and hot-pressing time 4 hours. Prepared PBO fiber reinforced resin matrix composites.

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Abstract

The invention discloses a PBO fiber reinforced resin-based composite material and a preparation method thereof. According to the method, PBO high-strength and high-modulus fibers are used as a reinforcing material, polyimide resin is used as a matrix, modified phenyl imide silane is used as a coupling agent to carry out surface modification on the PBO fibers, and then the PBO fiber reinforced resin-based composite material is obtained through compression molding of the PBO fibers and the polyimide resin. The composite material prepared by the method has the performance characteristics of lightweight, high temperature resistance, high strength and high modulus.

Description

technical field [0001] The invention belongs to the field of new material preparation, and in particular relates to a PBO fiber-reinforced resin-based composite material and a preparation method thereof. Background technique [0002] Resin-based composites are fiber-reinforced materials based on organic polymers. The resin matrix plays the role of a binder in the resin-based composite material. Polyimide is one of the most stable thermosetting resins. It has good wear resistance and wave permeability, but its mechanical properties are far from Less than the requirements of the aerospace field. Reinforcements are those parts of a resin matrix composite that provide strength and modulus. The high-performance PBO fiber has a tensile strength of 5.8GPa, a modulus of 280GPa, a limiting oxygen index of 68%, and a thermal decomposition temperature of 650°C. It has ultra-high strength and modulus, as well as excellent high temperature resistance and flame retardancy. It has impor...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08J5/06
CPCC08J5/06C08J2379/08
Inventor 许进沈伟林雪梅周刚杨优霞
Owner CHINA PETROLEUM & CHEM CORP
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