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Forming method for directionally reinforcing resin-based composite material by inducing carbon nanotubes through repeated flow

A technology of carbon nanotubes and composite materials, which is applied in the field of composite material preparation, can solve the problems of in-plane fiber damage, low interlayer strength, composite material modulus and heat and humidity resistance decline, etc., to improve the degree of automation and optimize the molding device , the effect of improving interlayer performance

Inactive Publication Date: 2019-12-03
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fiber unidirectional or two-dimensional fabric-reinforced resin matrix composites have the advantages of high specific strength, high specific stiffness, strong designability, fatigue resistance, corrosion resistance, etc., and have replaced traditionally used metal materials in many fields. However, at the same time It has the disadvantages of low interlayer strength, delamination resistance, and weak impact resistance, which limit its further wide application
Some researchers improve the interlayer performance by toughening the resin matrix, and add elastomers such as rubber and thermoplastic resins as plasticizers to the resin matrix. The disadvantage of this method is that while toughening, the composite material modulus And the resistance to heat and humidity is reduced, and the substantial increase in the toughness of the resin matrix cannot be effectively transferred to the composite material itself; some researchers use the sewing process to introduce high tensile strength sutures to the preforms in the thickness direction of the laminate. , such as carbon fiber, glass fiber, etc., connect each ply in the thickness direction as a whole, but the disadvantage of this method is that although the stitching improves the performance of the composite material in the thickness direction, it also causes damage to the fibers in the plane and reduces in-plane properties of composites

Method used

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  • Forming method for directionally reinforcing resin-based composite material by inducing carbon nanotubes through repeated flow
  • Forming method for directionally reinforcing resin-based composite material by inducing carbon nanotubes through repeated flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this example, the molding device used to prepare carbon nanotube-oriented reinforced resin-based composite materials has a structure such as figure 1 As shown, it includes a vacuum pump 1 , a three-hole flask 2 , a porous plate 3 , a bracket 4 , a pressure gauge 5 , a plurality of rubber hoses 6 and a beaker 7 . Wherein, the perforated plate 3 is a flat plate of 300 mm×200 mm, through-holes with a diameter of 5 mm are uniformly covered on the surface, and the distance between adjacent holes is 12 mm. One hole of the three-hole flask 2 is sealed and connected with the vacuum pump 1 by means of a rubber hose 6, and the other hole is sealed and connected with the pressure gauge 5; the perforated plate 3 is placed on the support 4, leaving a space below it.

[0032] First, prepare the oriented carbon nanotube / unidirectional carbon fiber prefabricated body, and its operation steps are:

[0033] (1) Select surface density as 300g / m 2 T700 unidirectional carbon fiber clot...

Embodiment 2

[0049] In this example, the molding device used to prepare carbon nanotube-oriented reinforced resin-based composite materials has a structure such as figure 2 As shown, it includes two vacuum pumps 1 , two four-hole flasks 2 , a perforated plate 3 , a bracket 4 , two pressure gauges 5 and multiple rubber hoses 6 . Wherein, the perforated plate 3 is a flat plate of 300 mm×200 mm, through-holes with a diameter of 5 mm are uniformly covered on the surface, and the distance between adjacent holes is 12 mm. Among the four holes of the two flasks 2, one hole is sealed with two vacuum pumps 1 by means of a rubber hose 6, one hole is sealed with a pressure gauge 5, and one hole is sealed with a hole of the other flask 2 by means of a rubber hose 6 connection, the rubber hose 6 is provided with a valve; the perforated plate 3 is placed on the support 4, leaving a space below it; the rubber hose 6 connecting two four-hole flasks 2, its two ends extend to the two flasks respectively 2...

Embodiment 3

[0066] In this embodiment, the molding device used to prepare carbon nanotube-oriented reinforced resin-based composite materials includes two vacuum pumps 1, two four-hole flasks 2, a porous plate 3, a bracket 4, two pressure gauges 5 and a plurality of rubber Hose6. Wherein, the perforated plate 3 is a flat plate of 300 mm×200 mm, through-holes with a diameter of 5 mm are uniformly covered on the surface, and the distance between adjacent holes is 12 mm. Among the four holes of the two flasks 2, one hole is sealed and connected with two vacuum pumps 1 by means of a rubber hose 6, and one hole is sealed and connected with the pressure gauge 5; the porous plate 3 is placed on the support 4 to leave a space below it.

[0067] First, prepare the oriented carbon nanotube / unidirectional carbon fiber prefabricated body, and its operation steps are:

[0068] (1) Select surface density as 300g / m 2 T700 unidirectional carbon fiber cloth, cut out eight pieces of square cloth with a s...

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Abstract

The invention discloses a forming method for directionally reinforcing a resin-based composite material by inducing carbon nanotubes through repeated flow, and belongs to the field of composite material preparation. By using a forming device, a prepared carbon nanotube aqueous dispersion repeatedly flows along the thickness direction of a laid fiber cloth, and compared with the prior art, more carbon nanotubes can stay in the carbon nanotube aqueous dispersion in a state of being oriented along the thickness direction of the fiber cloth, so that the interlayer performance of the fiber-reinforced resin-based composite material is obviously improved. In addition, the forming device can be optimized, so that the automation degree of repeated flowing operation is improved, and the purpose of shortening the test time is achieved.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular to a method for forming a resin-based composite material by inducing carbon nanotube orientation through repeated flow. Background technique [0002] Carbon nanotubes have been extensively studied as nanoreinforcement materials due to their excellent mechanical properties. Carbon nanotubes can be divided into two categories to enhance the interlayer performance of fiber composite materials: first, carbon nanotubes can significantly improve the mechanical properties of epoxy resin by enhancing the toughness of the epoxy resin matrix. After adding carbon nanotubes, the surface energy of the epoxy resin is reduced, the wettability of the fibers is improved, and the interfacial bonding between the two is enhanced, so that the interlayer toughness of the fiber-reinforced composite material can be strengthened; secondly, by grafting carbon nanotubes on the fibers surface for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/44B29C70/54
CPCB29C70/443B29C70/546
Inventor 刘爱云徐井利秦贞明魏化震刘方彪张建芹张海云王丹勇刘俊聪邢文芳陈以蔚李树虎
Owner SHANDONG NON METALLIC MATERIAL RES INST