High-performance wave-transmitting composite material based on PBO (poly-p-phenylene benzobisthiazole) fiber and preparation method thereof

A composite material and high-performance technology, applied in the field of advanced composite material science, can solve the problems affecting the excellent performance of reinforcement fibers, low interface performance of composite materials, poor bonding performance, etc., and achieve high interlayer shear strength, excellent medium The effect of improving electrical properties and toughness

Inactive Publication Date: 2012-09-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the smooth surface and low activity of PBO fiber, it is not easy to infiltrate with the resin matrix, resulting in poor bonding performance between th

Method used

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  • High-performance wave-transmitting composite material based on PBO (poly-p-phenylene benzobisthiazole) fiber and preparation method thereof
  • High-performance wave-transmitting composite material based on PBO (poly-p-phenylene benzobisthiazole) fiber and preparation method thereof
  • High-performance wave-transmitting composite material based on PBO (poly-p-phenylene benzobisthiazole) fiber and preparation method thereof

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Experimental program
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preparation example Construction

[0033] For the preparation process of the present invention, see figure 1 , first put the PBO fiber into an ethanol solution with a volume fraction of 1 / 3 to 2 / 3 of inorganic acid, react under the action of ultrasonic waves for 1 to 15 minutes, wash and dry, and then use a concentration of 1.0 to 5.0 wt%. Soak in the coupling agent for 1 to 24 hours, wash, dry, and set aside. Mix a certain amount of cyanate resin monomer and epoxy modifier, pre-polymerize at 120-160°C for 1-6 hours, add an appropriate amount of acetone or methyl ethyl ketone, mix evenly to make glue, and set aside. The processed PBO fiber is dipped, wound and dried to obtain a prepreg. Finally, the prepreg is cut into appropriate size and placed in the mold, and molded at high temperature. The pressing process is as follows: preheat treatment at 100℃~130℃ for 0.5-2h, then pressurize and solidify according to 140℃ / 2h+160℃ / 2h+180℃ / 2h+200℃ / 2h, and keep the pressure for 5~ 20MPa, then naturally cooled to room t...

Embodiment 1

[0043]First put the PBO fiber into the ethanol solution with a volume fraction of polyphosphoric acid of 1 / 3, and treat it under the action of ultrasonic waves for 10 minutes, then wash and dry the fiber, and then soak it in KH-560 with a concentration of 1.0wt% for 5 hours. Wash, dry, and set aside. Mix 100 parts of cyanate resin monomer and 5 parts of epoxy modifier E-51, pre-polymerize at 150°C for 2 hours, add 100 parts of acetone, mix evenly to make glue, and set aside. The processed PBO fiber is dipped, wound and dried to obtain a prepreg. Finally, the prepreg is cut into appropriate size and placed in the mold, and molded at high temperature. The pressing process is as follows: preheat treatment at 100℃~130℃ for 0.5~2h, then pressurize and solidify according to 140℃ / 2h+160℃ / 2h+180℃ / 2h+200℃ / 2h, and keep the pressure for 5~ 20MPa, then naturally cooled to room temperature, demolded, and the PBO fiber-reinforced composite material was obtained.

Embodiment 2

[0045] First, put the PBO fiber into an ethanol solution with a volume fraction of polyphosphoric acid of 1 / 2, and treat it under the action of ultrasonic waves for 7 minutes, then wash and dry the fiber, then soak it in KH-560 with a concentration of 2.0% for 5 hours, and wash it. , dry and set aside. Mix 100 parts of cyanate resin monomer and 10 parts of epoxy modifier E-51, prepolymerize at 140°C for 3 hours, add appropriate amount of acetone, mix evenly to make glue, and set aside. The rest of the implementation steps are the same as those in Example 1.

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Abstract

The invention discloses a high-performance wave transmitting composite material based on PBO (poly-p-phenylene benzobisthiazole) fiber and a preparation method of the composite material. The preparation method comprises the steps of: preparing epoxy-modified cyanate resin prepolymer from PBO fiber as a reinforcing material and modified bisphenol A type cyanate resin as a substrate through a heating fusion method, wherein the used cyanate resin contains an epoxy modifier; and adding an organic solvent to prepare liquid glue, immersing and winding treated PBO fiber, obtaining a prepreg after solvent is volatilized, paving the prepreg in a mold, and preparing the PBO fiber-reinforced cyanate composite material by a high-temperature pressure molding method. The high-performance wave transmitting composite material has the advantages of high strength, high modulus, low density, excellent high-temperature resistance and dielectric properties, excellent molding process property and the like.

Description

technical field [0001] The invention belongs to the scientific and technical field of advanced composite materials, and relates to a cyanate resin-based composite material and a preparation method thereof. Background technique [0002] With the development of science and technology in the field of aviation and aerospace, the performance requirements of wave-transparent composite materials are getting higher and higher. In addition to requiring low density, high modulus, excellent heat resistance and high specific strength, excellent Excellent dielectric properties, small thermal expansion coefficient and good molding process. However, the glass fiber / epoxy resin materials used today have problems such as high moisture absorption rate and weak space environment resistance, which can no longer meet the requirements of high-speed flight of future aircraft. [0003] PBO fiber has high strength, high modulus and a dielectric constant of only 2.1, which can meet the requirements ...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L65/00C08J5/06C08G59/40
Inventor 唐玉生颜红侠梁国正张梓军公超
Owner NORTHWESTERN POLYTECHNICAL UNIV
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