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Process for preparing poly-p-phenylenebenzobisthiazole (PBO) fiber/benzoxazine composite material

A technology of benzoxazine and composite materials, which is applied in fiber treatment, biochemical fiber treatment, textiles and papermaking, etc., to achieve the effect of high interlayer shear strength, low dielectric constant and dielectric loss factor

Inactive Publication Date: 2013-01-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, benzoxazine resin, like other thermosetting resins, also has the defect of brittleness, so it needs to be toughened and modified

Method used

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  • Process for preparing poly-p-phenylenebenzobisthiazole (PBO) fiber/benzoxazine composite material
  • Process for preparing poly-p-phenylenebenzobisthiazole (PBO) fiber/benzoxazine composite material
  • Process for preparing poly-p-phenylenebenzobisthiazole (PBO) fiber/benzoxazine composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First, the PBO fibers were immersed in an organic solution containing 0.2% horseradish peroxidase. Under the action of ultrasonic waves of 50-70W, 10mL of 4wt.% hydrogen peroxide aqueous solution was dropped into the system every 5min. After the addition was completed, the reaction was carried out for 0.5-2h. The fiber was taken out, washed with distilled water, and dried. Then, dissolve the coupling agent KH-560 in acetone, control the concentration at 3.0%, adjust the pH value to 3-6, soak the pretreated PBO fiber at room temperature for 1-48 hours, wash with distilled water, dry, and set aside. Mix the bismaleimide prepolymer with a mass fraction of 10% and the benzoxazine resin monomer, prepolymerize at 120-160°C for 1 hour, and then add 1 to 5 times the volume fraction of Acetone solution, mixed evenly to make glue, set aside. Dipping, winding and drying the treated PBO fiber, the temperature of the dipping is room temperature, the pulling speed is 1.0m / min, the d...

Embodiment 2

[0033] First, the PBO fibers were immersed in an organic solution containing 0.2% horseradish peroxidase. Under the action of ultrasonic waves of 50-70W, 15mL of 4wt.% hydrogen peroxide aqueous solution was added dropwise to the system every 5min. After the dropwise addition was completed, the reaction was carried out for 0.5-2h. The fiber was taken out, washed with distilled water, and dried. Then, dissolve the coupling agent KH-560 in acetone, control the concentration at 3.0%, adjust the pH value to 3-6, soak the pretreated PBO fiber at room temperature for 24 hours, wash with distilled water, dry, and set aside. Mix the bismaleimide prepolymer with a mass fraction of 20% and the benzoxazine resin monomer, prepolymerize at 120-160°C for 3 hours, and then add 1 to 5 times the volume fraction of Acetone solution, mixed evenly to make glue, set aside. The rest of the implementation steps are the same as those in Example 1.

Embodiment 3

[0035]First, the PBO fibers were immersed in an organic solution containing 0.3% horseradish peroxidase. Under the action of ultrasonic waves of 50-70W, add 20mL of 4wt.% hydrogen peroxide aqueous solution into the system every 5min. After the addition is complete, react for 0.5-2h, take out the fiber, wash it with distilled water, and dry it. Then, dissolve the coupling agent KH-560 in acetone, control the concentration at 3.0%, adjust the pH value to 3-6, soak the pretreated PBO fiber at room temperature for 24 hours, wash with distilled water, dry, and set aside. Mix the bismaleimide prepolymer with a mass fraction of 15% and the benzoxazine resin monomer, prepolymerize at 120-160°C for 2 hours, and then add 1 to 5 times the volume fraction of Acetone solution, mixed evenly to make glue, set aside. The rest of the implementation steps are the same as those in Example 1.

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Abstract

The invention relates to a process for preparing a PBO fiber / benzoxazine composite material. The process is characterized by comprising the steps of firstly, immersing PBO fibers into an organic solution of horseradish peroxidase, dropping in an aqueous solution of 4 wt.% hydrogen peroxide, immersing in acetone containing KH-560, mixing bismaleimide prepolymers with benzoxazine resin monomers, conducting prepolymerization at the temperature in a range of 120-160 DEG C for 1-6 hours, then adding an acetone solution which is in a volume fraction of 1-5 times into the mixture to produce a glue solution, and conducting gum dipping on processed PBO fibers to obtain a prepreg. Finally, the prepreg is subjected to high-temperature compression moulding. The composite material which is prepared by the process has the advantages of being high in strength, high in modulus, resistant to high temperatures, high in interlaminar shear strength, low in dielectric constant and dielectric loss factor and capable of meeting the strict requirements of modern aviation fields for the composite material.

Description

technical field [0001] The invention belongs to the field of composite material science and technology, and in particular relates to a preparation method of a PBO fiber / benzoxazine composite material. Background technique [0002] With the development of science and technology in the field of aviation and aerospace, the performance requirements of composite materials are getting higher and higher. In addition to requiring low density, high modulus, excellent heat resistance and high specific strength, excellent dielectric properties are also required. Electrical performance and small thermal expansion coefficient and good molding process and so on. 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 is a high-performance aromatic heterocyclic fiber made by PBO through liquid cry...

Claims

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Application Information

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IPC IPC(8): C08J5/06C08L79/04C08L79/08D06M16/00D06M11/50D06M13/513
Inventor 颜红侠刘超唐玉生梁国正
Owner NORTHWESTERN POLYTECHNICAL UNIV
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