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Preparation method of chopped carbon fiber reinforced phenolic resin base composite material

A technology of chopped carbon fiber and phenolic resin, applied in the field of composite material preparation, can solve the problems of difficulty in avoiding whisker agglomeration, increase material cost, etc., and achieve the effects of improving interlaminar shear strength, low cost, and avoiding agglomeration phenomenon

Inactive Publication Date: 2011-04-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of inorganic whiskers not only increases the cost of materials, but also makes it difficult to avoid the agglomeration of whiskers in the resin

Method used

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  • Preparation method of chopped carbon fiber reinforced phenolic resin base composite material
  • Preparation method of chopped carbon fiber reinforced phenolic resin base composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Take chopped carbon fibers and heat-treat them in an argon atmosphere furnace at 1200°C to remove metal ions and impurities on the surface; then, clean the heat-treated chopped carbon fibers with acetone in an ultrasonic wave until the surface is glue-free, and place them in an oven after cleaning Dry in medium until the acetone is completely volatilized, and set aside;

[0023] Step 2: Weigh 25 g of the chopped carbon fiber treated in step 1, soak it in a dispersant solution with a concentration of 0.1% by weight for 10 hours, and the dispersant is selected from methylcellulose solution, and then wash it with distilled water dry, ready for use;

[0024] Step 3: Weigh 10g of the material obtained in step 2, then place it in 200ml of absolute ethanol, stir it fully with a stirrer, and dissolve 100g of phenol formaldehyde resin at the same time, after fully stirring and mixing, the mixture of resin matrix and chopped carbon fiber is obtained. material;

[0025] ...

Embodiment 2

[0030] Step 1: Take chopped carbon fibers and heat-treat them in an argon atmosphere furnace at 1400°C to remove surface metal ions and impurities. After heat-treatment, carbon fibers are cleaned with acetone in ultrasonic waves until the surface is glue-free. After cleaning, dry them in an oven until Acetone is completely volatilized and reserved;

[0031] Step 2: Weigh 35 g of the chopped carbon fiber treated in step 1, soak it in a dispersant solution with a concentration of 0.3% by weight for 15 hours, and the dispersant solution is selected from hydroxypropyl methylcellulose solution, and then use distilled water After cleaning, dry and set aside;

[0032] Step 3: Weigh 20 g of the material obtained in step 2, place it in 200 ml of absolute ethanol, stir it fully with a stirrer, and dissolve 100 g of cresol formaldehyde resin at the same time, stir and mix evenly to obtain a mixture of resin matrix and chopped carbon fiber;

[0033] Step 4: Leave the mixture obtained in ...

Embodiment 3

[0038] Step 1: Take chopped carbon fibers and heat-treat them in an argon atmosphere furnace at 1600°C to remove surface metal ions and impurities. After heat-treatment, carbon fibers are cleaned with acetone in ultrasonic waves until the surface is free of glue. After cleaning, dry them in an oven until Acetone is completely volatilized and reserved;

[0039] Step 2: Weigh 45 g of the chopped carbon fiber treated in step 1, soak it in a dispersant solution with a concentration of 0.5% by weight for 20 hours, and the dispersant solution is selected from sodium polyacrylate solution, and then wash it with distilled water dry, ready for use;

[0040] Step 3: Weigh 30g of the material obtained in step 2, put it in 200ml of absolute ethanol, stir fully with a stirrer, and dissolve 100g of xylenol formaldehyde resin at the same time, stir evenly, and obtain a mixture of resin matrix and chopped carbon fiber ;

[0041] Step 4: The mixture obtained after drying in Step 3 was left a...

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Abstract

The invention provides a preparation method of a chopped carbon fiber reinforced phenolic resin base composite material, which comprises the following steps: dissolving chopped carbon fibers after dispersion, which are used as the reinforcing material, in anhydrous alcohol; meanwhile, adding phenolic resin, and evenly mixing; and carrying out die pressing to obtain the chopped carbon fiber reinforced phenolic resin base composite material. The chopped carbon fibers in the material have a three-dimensional network structure, the three-dimensional network structure converts the combination of fibers and resin matrix from two-dimensional connection to three-dimensional connection with spatial effect; when being subjected to shear action, work needs to be applied to overcome the binding force between the matrix and the fibers, so that the expansion of the cracks consumes more energy, thereby enhancing the interlaminar shear strength, avoiding the generation of aggregation and requiring low cost.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a chopped carbon fiber reinforced phenolic resin-based composite material. Background technique [0002] Short carbon fiber reinforced phenolic resin-based composites are widely used in many high-performance civil structures such as aviation, aerospace, automobiles, and ships due to their light weight, high strength, high temperature resistance, corrosion resistance, and fatigue resistance. However, the low interlaminar shear strength of carbon fiber reinforced resin matrix composites is a weak link in its application. [0003] Reasonably organizing the structure of fiber reinforcement is one of the effective methods to improve the interlaminar shear strength of composite materials. For example, the use of carbon fiber three-dimensional braids or integral mats can greatly improve the interlayer performance of composite materials, but the imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/40B29C70/12B29K61/04
Inventor 李翠艳黄剑锋曹丽云吴建鹏卢靖
Owner SHAANXI UNIV OF SCI & TECH
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