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Carbon fiber reinforced polymer matrix composite board and preparing method thereof

A composite plate and polymer technology, applied in chemical instruments and methods, synthetic resin layered products, lamination, etc., can solve problems such as large labor force, low production efficiency, and long curing time

Pending Publication Date: 2017-11-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it costs more
With the continuous improvement of domestic SMC (sheet plastic) manufacturing technology and molding technology, the reduction of mold costs, and the improvement of government requirements for working environments, many products that were originally molded by hand lay-up, spraying, etc., curing time Long, low production efficiency, large labor force, and pollution to the environment, the SMC compression molding process has been gradually used

Method used

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  • Carbon fiber reinforced polymer matrix composite board and preparing method thereof
  • Carbon fiber reinforced polymer matrix composite board and preparing method thereof
  • Carbon fiber reinforced polymer matrix composite board and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Put the short carbon fiber in 65wt% nitric acid solution and soak for 2h. Rinse with deionized water until neutral and dry for later use.

[0031] (2) Soak the carbon fibers obtained in step (1) in a silane solution with a volume concentration of 35% for 3 hours, rinse with water until neutral, and dry in a vacuum oven at 120° C. for 5 hours to obtain modified carbon fibers.

[0032] (3) Dry the polylactic acid fiber in an oven at 85° C. for 12 h to remove the adsorbed moisture to prevent shear degradation.

[0033] (4) Mix the modified carbon fiber obtained in step (2) with the polylactic acid obtained in step (3) in a ratio of 10:90. Comb the fiber raw material that has been initially opened and mixed into a thin net composed of single fibers. The thin web output from the carding machine is laid up into a fiber web of a certain thickness by cross-laying into a web, and then needle-punched into a felt.

[0034] (5) First, clean the inner sides of the two molds. ...

Embodiment 2

[0036] (1) Dry the polylactic acid in an oven at 50°C for 24 hours to remove the adsorbed moisture. Then polylactic acid is melted and extruded through a ring-shaped mold, pulled up by a coiled roller, air is introduced into the polymer tube to expand, and cooled within a certain distance from the mold exit to form a film with a thickness of 0.3mm. From the hopper to the die, the temperature of the single-screw extruder was set at 160, 180, 190 and 190 °C, respectively.

[0037] (2) Two layers of carbon fiber non-woven fabric and the PLA film obtained in step (1) are alternately stacked to 2 cm, and then placed between two polytetrafluoroethylene sheets, and placed in a metal counter-mold with the inner side wiped clean. When closing the mold, the fast speed is 8m / min, and when the distance between the male and female molds is 8cm, the slow speed is changed to 3m / min. Heat to 200°C, pressurize to 150MPa, hold the pressure for 5 minutes, solidify and form, release the pressure...

Embodiment 3

[0039] (1) Place short carbon fibers in 70%wt potassium permanganate solution and soak for 2h. Rinse with deionized water until neutral and dry for later use.

[0040](2) Soak the carbon fibers obtained in step (1) in a silane solution with a volume fraction of 30% for 2 hours, rinse with water until neutral, and dry in a vacuum oven at 120° C. for 5 hours to obtain modified carbon fibers.

[0041] (3) Carding the fiber raw materials that have been preliminarily opened and mixed into a thin web composed of single fibers, laying up a fiber web of a certain thickness by cross-laying to form a web, and then needling to form a felt.

[0042] (4) Dry the polylactic acid in an oven at 50°C for 24h to remove the adsorbed moisture. Then polylactic acid is melted and extruded through a ring-shaped mold, pulled up by a coiled roller, air is introduced into the polymer tube to expand, and cooled within a certain distance from the mold exit to form a film with a thickness of 0.3mm. From...

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Abstract

The invention provides a carbon fiber reinforced polymer matrix reinforced board and a preparing method thereof and belongs to the technical field of automobile internal decorating materials. The board is formed in the mode that short-cut carbon fiber is mixed with polymer, and methods of felt making of fiber mixing, lamination of carbon fiber cloth and polymer film and lamination of carbon fiber felt and polymer film are adopted to prepare preforming parts respectively. Then, through a compound forging forming technology, the preforming parts are subjected to pressing forming, and a carbon fiber reinforced composite material of high performance is prepared. The carbon fiber reinforced polymer matrix reinforced board meets requirements of mass and assembly line production, lowers cost, improves production efficiency, and promotes large-scale industrialization application of the carbon fiber composite material.

Description

technical field [0001] The invention belongs to the technical field of lightweight materials for automobiles. Background technique [0002] Carbon fiber is a new type of high-strength, high-modulus fiber with a carbon content of more than 95%. It is known as the "king of new materials". Carbon fiber is "soft on the outside and rigid on the inside". The density of carbon fiber is less than 1 / 4 of that of steel, and its strength is 5-7 times that of steel. It has two characteristics: soft fiber, machinability and strong tensile strength. Carbon fiber has many excellent properties. Carbon fiber has high axial strength and modulus, high specific performance, good fatigue resistance, good X-ray transparency, no creep, low density, ultra-high temperature resistance in non-oxidizing environment, and small thermal expansion coefficient. And it has anisotropy, insolubility and swelling in organic solvents, acids and alkalis, outstanding corrosion resistance, good electrical and ther...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B27/12B32B27/32B32B27/34B32B27/36B32B27/02B32B33/00B32B37/06B32B37/10
CPCB32B5/02B32B9/007B32B9/045B32B27/12B32B27/32B32B27/34B32B27/365B32B33/00B32B37/06B32B37/10B32B2605/08B32B2307/558B32B2262/0253B32B2262/0261B32B2262/0276B32B2262/106
Inventor 李志刚刘俊辉刘雪强韩洪江
Owner JILIN UNIV
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