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Self-reinforced interlayer shearing intensity resin base fiber reinforced composite material preparation method

A composite material and shear strength technology, which is applied in the field of preparation of self-reinforced interlayer shear strength resin-based fiber-reinforced composite materials, can solve the problems of high cost and reduced mechanical properties of composite materials, and achieve the reduction of thermal expansion coefficient and solution of layer Cracking between layers and improvement of interlaminar shear strength

Inactive Publication Date: 2006-04-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are relatively effective and have been applied, but there are also certain problems. For example, the braided structure can make the existing resin system play a greater potential. Both the resin system and the method itself are conducive to reducing costs. However, this Difficult to use in complex structures
In addition, the braided structure inevitably causes bending of the fibers, which reduces the mechanical properties of the composite
Furthermore, the cost of weaving is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Put 23.66g of p-aminobenzenesulfonamide into 100g of 4,4'-bis(2,3-epoxypropoxy)-α-methylstilbene at 155-160°C and stir for 20min to obtain a mixed Uniform liquid crystal epoxy resin;

[0016] 2) Add 10g of liquid crystal epoxy resin to 100g of commercial modified bismaleimide resin 4501A at 100-110°C, and stir evenly. Add 200ml acetone again, stir, obtain the acetone solution of resin matrix;

[0017] 3) Prepare a continuous glass fiber prepreg by a conventional wet method, with a glue content of 40% (percentage by weight);

[0018] 4) Lay the prepreg in one direction, put it into the mold, and carry out compression molding. A static magnetic field is used, the direction of the magnetic field is parallel to the thickness direction, and the field strength is 9T. The curing temperature control program is 150°C / 4h+180°C / 1h+200°C / 4h; after the molding is finished, cool down to normal temperature naturally, and then remove the mold;

[0019] 5) Perform post-treatment ...

Embodiment 2

[0023] 1) Put 23.66g of p-aminobenzenesulfonamide into 100g of 4,4'-bis(2,3-epoxypropoxy)-α-methylstilbene at 155-160°C and stir for 20min to obtain a mixed Uniform liquid crystal epoxy resin;

[0024] 2) Add 10g of liquid crystal epoxy resin to 100g of commercial modified bismaleimide resin 4501A at 100-110°C, and stir evenly. Add 200ml acetone again, stir, obtain the acetone solution of resin matrix;

[0025] 3) Prepare the continuous carbon fiber prepreg according to the traditional wet method, with a glue content of 40%;

[0026] 4) Lay up the prepreg, put it into the mold, and carry out compression molding. Using a variable pulse magnetic field (the direction of the magnetic field is parallel to the thickness direction, and the field strength is from 2-20T), the curing temperature control program is 150°C / 4h+175°C / 1h+200°C / 4h; after the molding is completed, it is naturally cooled to room temperature , mold removal;

[0027] 5) Perform post-treatment in an oven (220° ...

Embodiment 3

[0031] 1) Put 23.66g of p-aminobenzenesulfonamide into 100g of 4,4'-bis(2,3-epoxypropoxy)-α-methylstilbene at 155-160°C and stir for 20min to obtain a mixed Uniform liquid crystal epoxy resin;

[0032] 2) Put 23g of short glass fibers with a length of 3mm into liquid crystal epoxy resin at 100-110°C and mix them evenly to obtain a prepreg;

[0033] 4) Put the prepreg into the mold for compression molding. Using a static magnetic field (the magnetic field direction is 45° to the thickness direction, and the field strength is 12T), the curing temperature control program is 150°C / 4h+175°C / 1h+200°C / 4h; , that is obtained from advanced resin matrix composites with enhanced interlaminar shear strength. The properties are shown in Table 1.

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PUM

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Abstract

The invention discloses a resin fiber composite material making method of self-reinforced interlayer shearing strength, which is characterized by the following: weighing 5-100 liquid crystal resin; preparing prepreg according to wet method or melting method; or adapting liquid phase modeling craft to form composite material without preparing prepreg according to the conventional composite material moulding method; paving prepreg layer; forcing static magnetic field or variable pulse magnetic field with 2-20 T magnetic strength in the moulding course; orienting the solid liquid crystal at the given direction; cooling the moulded mold to atmospheric temperature naturally then demoulding; or doing after-treatment again to demould after cooled to atmospheric temperature naturally. The invention improves the shearing strength and, which reduces cost.

Description

technical field [0001] The invention relates to a method for preparing a self-reinforced interlaminar shear strength resin-based fiber-reinforced composite material. Background technique [0002] Advanced resin matrix composites play an indispensable role in modern industry due to their outstanding light weight, high heat resistance, high specific strength, and high specific modulus. The research and development level of composite materials has been considered as a An important indicator of a country's comprehensive strength. Higher performance of materials, better manufacturability, and appropriate cost are the goals that people have been pursuing. However, in general, composites have low interlaminar shear properties and are sensitive to impact, especially when subjected to low-velocity impact. For advanced composite materials represented by carbon fiber, this problem is more prominent, which seriously restricts its application in harsher conditions than the existing wor...

Claims

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Application Information

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IPC IPC(8): B29C70/34B29C70/06B29C70/54B29K33/04B29K35/00B29K63/00B29K67/00B29K77/00B29K85/00
Inventor 顾媛娟梁国正
Owner ZHEJIANG UNIV
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