PBO fiber epoxy resin composite material and preparation method thereof

A technology of epoxy resin and composite materials, which is applied in the field of PBO fiber composite materials, can solve the problems of the interface force between the reinforced fiber and the resin matrix, and the effect is not ideal, so as to improve the shear strength, improve the interface performance, and smoothly transfer the stress. Effect

Active Publication Date: 2017-06-09
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the literature and patent methods that have been published in this regard mostly improve the polarity of the fiber surface through a more optimized surface treatment process for PBO fibers, introduce active groups, and enhance the interfacial force between the fiber and the resin matrix. Its effect is not ideal enough

Method used

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  • PBO fiber epoxy resin composite material and preparation method thereof
  • PBO fiber epoxy resin composite material and preparation method thereof
  • PBO fiber epoxy resin composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] First, immerse the PBO fiber in a solution containing 2% methanesulfonic acid, and treat it for 305 minutes under the action of 50W ultrasonic waves, take out the fiber, wash it with distilled water, dry it, and set it aside.

[0044] With 40 parts by mass of commercial epoxy resin E51, 5 parts by mass of epoxy resin A, 0.5 parts by mass of epoxy resin curing accelerator, 5 parts by mass of bisphenol A type benzoxazine resin Ba, 2.5 parts by mass of benzoxazine resin B Mix evenly, and pre-polymerize at 120°C for 2 hours, then add 100 parts of acetone to make a rubber compound.

[0045] Immerse 100 parts by mass of PBO fiber into the rubber compound obtained in the above steps, wind and dry to obtain a prepreg, spread the prepreg in a mold, first preheat at 100°C for 1h, and then press 130°C / 1h +140°C / 2h+150°C / 2h+170°C / 1h+180°C / 0.5h stepwise temperature increase and pressure curing, the pressure is maintained at 12-15MPa, then naturally cooled to room temperature, demoul...

Embodiment 2

[0051] In this example, only the composition of epoxy resin A and benzoxazine resin B in the rubber material is different from Example 1, and the rest are the same as Example 1.

[0052] In the present embodiment, epoxy resin A still is 5 mass parts, but its composition is the epoxy mixture of following three kinds of structures, wherein:

[0053]

[0054] 1 part by mass;

[0055]

[0056] 3 parts by mass;

[0057]

[0058] 1 part by mass;

[0059] In this embodiment, the content of benzoxazine resin B is still 2.5 parts by mass, but its composition is a mixture of benzoxazines with the following three structures:

[0060]

[0061] 1 part by mass;

[0062]

[0063] 1 part by mass;

[0064]

[0065] 0.5 parts by mass;

Embodiment 3

[0067]In this example, only the composition and content of epoxy resin A and benzoxazine resin B in the rubber compound are different from Example 1, and the rest are the same as Example 1.

[0068] In the present embodiment, epoxy resin A is 10 mass parts, and its composition is the epoxy mixture of following three structures, wherein:

[0069]

[0070] 1 part by mass;

[0071]

[0072] 7 parts by mass;

[0073]

[0074] 2 parts by mass;

[0075] In this embodiment, the content of benzoxazine resin B is 5 parts by mass, and its composition is a mixture of benzoxazines with the following three structures:

[0076]

[0077] 1 part by mass;

[0078]

[0079] 3 parts by mass;

[0080]

[0081] 1 part by mass;

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Abstract

The invention relates to a PBO fiber epoxy resin composite material and a preparation method thereof. The PBO fiber epoxy resin composite material contains the following components in parts by mass: 100 parts of PBO fibers and 50-80 parts of a mixed epoxy resin matrix. The preparation method comprises the following steps: firstly preparing a glue material by virtue of pre-polymerization; carrying out surface modification on the PBO fibers; soaking the PBO fibers into glue material, winding, airing to obtain a prepreg, paving the prepreg into a mold, carrying step heating, pressurization and curing, naturally cooling to the room temperature, and carrying out demolding, so as to obtain the PBO fiber/epoxy resin composite material. Novel epoxy resin and benzoxazine resin which have good compatibility with PBO are adopted in the matrix resin glue material, so that the wettability and cohesive property of the PBO fibers to the matrix resin can be increased, therefore, the interface performance of the resin and the fibers is remarkably improved, and the high strength property of the PBO fibers in the composite material is adequately exerted; and furthermore, the temperature resistance grade of the composite material is substantially increased, the mechanical property of the composite material is substantially improved, and the PBO fiber epoxy resin composite material can be used for preparing high-temperature-resistant composite materials and composite materials with high strength requirements.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of PBO fiber composite materials, in particular to a PBO fiber epoxy resin composite material and a preparation method thereof. [0003] 【Background technique】 [0004] Polyphenylene benzobisoxazole (PBO) is a class of benzoxazole-containing aromatic heterocyclic liquid crystal polymers, which have excellent mechanical properties, high temperature resistance and chemical stability, and have broad application prospects in the field of high-performance materials , especially for high-strength fibers. PBO fiber is currently used in fields such as body armor, explosion-proof impact materials and high-strength composite materials for aircraft. [0005] However, unlike other high-performance fibers used in composite materials, the molecular structure of PBO polymer lacks polar groups, resulting in poor wettability, low interfacial bonding force between fiber and resin matrix, easy to generate interface de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L63/00
CPCC08L79/04C08L2201/08C08L2205/02C08L2205/035C08L2205/16C08L63/00
Inventor 刘小云张如红黄国瑞李欣欣庄启昕钱军
Owner EAST CHINA UNIV OF SCI & TECH
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