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A method for interlayer mechanical properties of magnetic field-oriented carbon nanotube-reinforced fiber resin matrix composites

A technology of oriented carbon nanotubes and composite material layers, which is applied in the field of preparation of interlayer properties of magnetic field oriented carbon nanotubes reinforced fiber resin-based composite materials, which can solve in-plane fiber damage, low interlayer strength, weak impact resistance, etc. problems, to achieve the effect of easy operation, improved mechanical properties between layers, and good realizability

Active Publication Date: 2021-09-03
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, its layer The disadvantages of low inter-strength and weak anti-delamination and impact resistance 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., to connect each ply into 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 the strength of the composite material. in-plane performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take a sufficient amount of multi-walled carbon nanotubes with a length of 85-100um and a diameter of 20-30nm, and cover the surface with γ-Fe with a diameter of 10-20nm 2 o 3 Particles, after the coating is completed, the content of ferromagnetic particles is 0.5%wt.

[0022] 0.5 parts of the surface prepared above were coated with γ-Fe 2 o 3 Multi-walled carbon nanotubes of nanoparticles, 100 parts of TDE-85, 70 parts of T403, 20 parts of acetone and 0.4 parts of surfactant tritonX-100 were poured into a 1000ml beaker placed in an ultrasonic cleaning tank. Start the ultrasonic cleaning tank, set its power to 500W, set its frequency to 45kHz, and ultrasonically disperse for 2 hours at room temperature to prepare a resin dispersion.

[0023] Evenly brush the above resin dispersion on a 1000mmX360mm single-layer carbon fiber fabric, and place it at room temperature for 7 days. After the acetone is completely volatilized, place it in a vacuum oven and dry it at 100°C f...

Embodiment 2

[0028] Take a sufficient amount of single-walled carbon nanotubes with a length of 75-90um and a diameter of 15-25nm, and cover the surface with Fe with a diameter of 10-20nm 3 o 4 Particles, after the coating is completed, the content of ferromagnetic particles is 5%wt.

[0029] 0.5 parts of the surface prepared above were coated with Fe 3 o 4 Single-walled carbon nanotubes of nanoparticles, 100 parts of TDE-85, 25 parts of DDS, 0.7 parts of accelerator, 80 parts of acetone and 0.4 parts of surfactant tritonX-100 were poured into 1000ml beakers placed in the ultrasonic cleaning tank . Start the ultrasonic cleaning tank, set its power to 500W, set its frequency to 45kHz, and ultrasonically disperse for 2 hours at room temperature to prepare a suspension.

[0030] Evenly brush the above-mentioned resin suspension on a single-layer glass fiber fabric of 1000mmX360mm, and place it at room temperature for 7 days. In B-stage state, it is prepared into glass fiber prepreg. Cut...

Embodiment 3

[0035] Take two sufficient multi-walled carbon nanotubes, one of which has a length of 50-80 um and a diameter of 8-20 nm, and the other has a length of 70-100 um and a diameter of 15-30 nm. Cover the surface of two multi-walled carbon nanotubes with Fe with a diameter of 10-20nm 3 o 4 Particles, after loading, Fe 3 o 4 The particle content of the former is 8wt%, and the latter is 10wt%.

[0036] Weigh 1.2g of surfactant SDS and add it to a beaker containing 500ml deionized water, then add 1.5g of the above-prepared Fe 3 o 4 After stirring the multi-walled carbon nanotubes with a nanoparticle content of 8wt%, the beaker is placed in an ultrasonic cleaning pool. Start the ultrasonic cleaning tank, set its power to 500W, set its frequency to 45kHz, and ultrasonically disperse at room temperature for 1 hour to prepare an aqueous dispersion of carbon nanotubes.

[0037] Spray the above resin dispersion evenly onto a 1000mmX360mm single-layer carbon fiber UD cloth, then put i...

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Abstract

The invention discloses a method for magnetically oriented carbon nanotubes to reinforce interlayer mechanical properties of fiber resin-based composite materials, belonging to the field of composite material preparation. In the present invention, the surface of the carbon nanotubes in the fiber prepreg cloth is covered with magnetic nanoparticles, and a magnetic field with a strength of 0.1T~1.6T is applied during the hot pressing forming process, so that the carbon nanotubes can be prepreg along the fibers before the resin is solidified. The orientation in the thickness direction of the impregnated material improves the interlayer mechanical properties of the fiber resin matrix composite material; the applied magnetic field is a periodic magnetic field, which is to avoid long-term magnetization and high temperature, which will cause the equipment to overheat and easily damage the equipment. In addition, the method of the invention has the advantages of easy operation, good realizability and the like.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular to a method for preparing a magnetic field-oriented carbon nanotube reinforced interlayer performance of a fiber resin-based composite material. 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, which can enhance the interlayer toughness of the fiber composite material; secondly, by grafting carbon nanotubes on the fibers surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C70/54
CPCB29C70/345B29C70/54B29C2791/004
Inventor 徐井利秦贞明魏化震贾华敏郭建芬韩军慧石磊张海云刘方彪王丹勇李树虎陈以蔚
Owner SHANDONG NON METALLIC MATERIAL RES INST
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