Preparation method of thermosetting-resin-based composite material of carbon fiber broadening cloths

A composite material and carbon fiber technology, which is applied in the field of forming carbon fiber expanded cloth reinforced resin-based composite materials, can solve the problems of unreported preparation methods of reinforced resin-based composite materials, poor molding process of reinforced resin-based composite materials, and difficulty in effective resin glue Infiltration and other problems, to achieve the effect of high specific gravity, low specific gravity and low porosity

Active Publication Date: 2019-06-11
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is precisely because the carbon fiber spread cloth is lighter, thinner, and has good monofilament arrangement regularity, the carbon fiber spread cloth is more easily deformed, the multi-layer stack is dense, and the resin is difficult to infiltrate, resulting in poor molding process of the reinforced resin matrix composite material.
[0005] Vacuum-assisted infusion molding is a common molding process for composite products, but for regularly arranged and compact carbon fiber spread fabrics, due to the tight compaction between the fabric layers, it is difficult for the resin glue to infiltrate effectively, the infusion efficiency is extremely low, and the impregnation effect is also poor. Not good, it is difficult to effectively form large-size and high-thickness carbon fiber expanded cloth reinforced resin matrix composites
[0006] In hand lay-up and conventional molding processes, the resin impregnation process is likely to cause deformation of the yarn bundle structure and fiber damage, which cannot guarantee the effective performance of the fiber properties
[0007] As a new fabric form, carbon fiber stretch cloth has not been reported on the preparation method of its reinforced resin matrix composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Taking the preparation of a composite material plate of 500mm×500mm as an example, the surface density is 100g / m 2 , Carbon fiber spread cloth with a warp and weft density of 6.25×6.25 ends / 10cm is the reinforcement, SW980 vinyl ester resin is the resin matrix; 500mm×500mm 300-mesh screen, 530mm×530mm polyester XP1255 semi-permeable membrane for use.

[0027] Dilute the vinyl ester resin with methyl methacrylate until the viscosity reaches 180mpa·s.

[0028] The screen is centered on the semi-permeable membrane, and the glue solution containing 20g of pure resin is evenly spread and scraped on a semi-permeable membrane through the screen with a scraper, and the screen is removed to obtain the glue with the semi-permeable membrane as the carrier. membrane.

[0029] Spread the 500mm×500mm carbon fiber spread cloth in the center and flatly cover the glue liquid surface of one film, and put the glue liquid of the other film on the other side that is laying the carbon fiber...

Embodiment 2

[0033] Taking the preparation of a 1000mm×1000mm composite bent plate as an example, the surface density is 200g / m 2 , The carbon fiber spread cloth with a warp and weft density of 12.5×12.5 ends / 10cm is used as a reinforcement, and the modified bisphenol A epoxy vinyl ester resin is used as a resin matrix.

[0034] Dilute the bisphenol A type epoxy vinyl ester resin with α-methylstyrene to a viscosity of 90mpa·s, use a 1000mm×1000mm 400 mesh screen, and a 1025mm×1025mm epoxy type Dahltexx semi-permeable membrane for later use.

[0035] The same process as in Example 1 was used to make adhesive films with 90 g and 55 g of pure resin respectively.

[0036] Spread a 1000mm×1000mm carbon fiber spread cloth in the center and evenly on the glue liquid surface of the 90g adhesive film, put 55g of the adhesive film glue on the other side that is laying the carbon fiber spread cloth flatly, and let it cool for 5 hours at room temperature. A carbon fiber spread fabric prepreg with sem...

Embodiment 3

[0040] Taking the preparation of a 500mm×500mm composite arc panel as an example, the surface density is 160g / m 2, The carbon fiber spread cloth with warp and weft density of 10×10 ends / 10cm is the reinforcement, and the modified 193R o-phthalic unsaturated polyester resin is the resin matrix. 500mm×500mm mesh is 400 mesh screen, 520mm×520mm polyester type XP1255 semi-permeable membrane for spare.

[0041] Add KH-570 silane coupling agent with a mass fraction of 1% to the resin, and dilute the modified 193R o-phthalic unsaturated polyester resin with styrene until the viscosity reaches 100mpa·s.

[0042] Adopt the same technique as embodiment one to make the adhesive film that contains pure resin 48g. Lay a 500mm×500mm carbon fiber splayed cloth in the center and evenly on the glue liquid surface of the adhesive film, and let it cool for 3.5 hours at room temperature to obtain a carbon fiber splayed cloth prepreg with a semipermeable membrane on one side.

[0043] When moldi...

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Abstract

The invention belongs to the technical field of composite material forming, and relates to a preparation method of a thermosetting-resin-based composite material of carbon fiber broadening cloths. A thin film composite technology is adopted, the fiber state is retained, a glue film and prepreg are prepared by adopting a ventilating and glue-permeation-free semipermeable film as a carrier, uniformity of the glue film is controlled through a screen net coating process, and a combined demolding structure of a ventilating and glue-permeation demolding cloth and ventilating felt is adopted to effectively discharge an excessive glue solution in a blank and solvent gas; the preparation method of the thermosetting-resin-based composite material of the carbon fiber broadening cloths comprises the steps: prepreg preparation, overlaying and hot-pressing forming are conducted, and the glue solution is smeared and applied to the surface of the ventilating and glue-permeation-free semipermeable filmof the matched screen net to prepare the glue film; and the carbon fiber broadening cloths are flatly laid on the surface of the glue film in a covering mode, and hot-pressing forming is conducted through a conventional process. The carbon fiber broadening cloth laminated composite material prepared through the method is even in resin distribution, good in fiber state retainability, high in strength conversion rate and easy to operate and control; and the preparation method is suitable for preparation of the thermosetting-resin-based composite material and particularly suitable for massive product processing and mechanical continuous preparation of the prepreg.

Description

technical field [0001] The invention belongs to the technical field of composite material molding, and relates to a fabric-reinforced composite material lamination technology, in particular to a carbon fiber stretch cloth-reinforced resin-based composite material molding technology. Background technique [0002] The axial strength and modulus of carbon fiber are high, and its Young's modulus is more than three times that of traditional glass fiber (GF) and about two times that of aramid fiber (KF-49). Carbon fiber composites have excellent comprehensive mechanical properties : Specific strength (ratio of strength to density), specific modulus (ratio of modulus to density) and specific energy absorption (energy absorbed per unit mass within the effective destruction length), under the design principle of equal stiffness or equal strength, carbon fiber Composite material structural parts are more than 50% lighter than low-carbon steel structural parts, 30% lighter than magnesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54C08J5/24C08K7/14
Inventor 孔令美王小兵齐燕燕薛亚娟郑威王宝春徐洪敏王炤亮高泉喜
Owner SHANDONG NON METALLIC MATERIAL RES INST
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