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Method for improving interface performance of resin matrix and carbon fibers

A resin matrix, carbon fiber technology

Active Publication Date: 2021-08-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the graphene oxide / carbon fiber composite reinforcement can improve the interfacial properties between carbon fiber and epoxy resin, its preparation method needs to adopt the diazotization electrochemical grafting method, and the preparation process is complicated. Moreover, the graphene oxide The interfacial shear strength (IFSS) of the epoxy resin composite material made of carbon fiber composite reinforcement is only 61.19MPa, which needs to be further improved

Method used

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  • Method for improving interface performance of resin matrix and carbon fibers
  • Method for improving interface performance of resin matrix and carbon fibers
  • Method for improving interface performance of resin matrix and carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1, prepare the GO / CF reinforced epoxy composite material of the present invention

[0051] Step 1: Preparation of graphene oxide modified carbon fiber

[0052] The CFs were refluxed in acetone at 80 °C for 48 h, then washed with acetone, and dried in a vacuum oven at 80 °C for 12 h to remove residual acetone and contaminants.

[0053] In a 200 mL beaker filled with 100 mL of deionized water, 6 mL of GO aqueous suspension with a lateral dimension of 200 nm (where the GO concentration was 5 mg / mL) was added, and sonicated (ultrasonic power: 600 W) for 30 minutes to separate GO sheets. Then 0.075 g of CMC was added to the above solution and mixed uniformly to obtain a sizing agent. The CFs were immersed in the sizing agent for sizing for 15 minutes, and dried in an oven at 80 °C for 24 hours to obtain a carbon fiber sample after introducing GO, which was named as M40 J / GO-200nm.

[0054] Step 2: Prepare composite material

[0055] Composite materials were pr...

Embodiment 2

[0056] Embodiment 2, prepare the GO / CF reinforced epoxy composite material of the present invention

[0057] Step 1: Preparation of graphene oxide modified carbon fiber

[0058] Referring to the method of step 1 of Example 1, the only difference is that 6 mL of GO aqueous suspension (wherein the GO concentration is 5 mg / mL) with a lateral dimension of 200 nm is replaced by 10 mL of GO aqueous suspension with a lateral size of 1 μm (wherein the GO concentration is 5 mg / mL). / mL), and a carbon fiber sample introduced with GO was prepared, which was named M40 J / GO-1μm.

[0059] Step 2: Prepare composite material

[0060] Referring to the method of step 2 of Example 1, the only difference is that the M40 J / GO-200nm carbon fiber is replaced by the M40 J / GO-1 μm carbon fiber to obtain the composite material of the present invention: M40 J / GO-1 μm-epoxy composite material.

experiment example 1

[0067] Experimental Example 1. Structure and Morphological Characterization of Graphene Oxide Sheets with Different Lateral Sizes

[0068] 1. Experimental method

[0069] Test samples: 5 mg / mL GO aqueous suspension with a lateral dimension of 200 nm was sonicated for 30 minutes, and 5 mg / mL GO aqueous suspension with a lateral dimension of 1 μm was sonicated for 30 minutes.

[0070] Detection method: transmission electron microscope (TEM), atomic force microscope (AFM).

[0071] 2. Experimental results

[0072] The result is as figure 2 shown. From figure 2 (a) and figure 2 (b) It can be seen that the GO aqueous suspension with a lateral dimension of 5 mg / mL of 200 nm and the aqueous suspension of GO with a lateral dimension of 1 μm in 5 mg / mL are ultrasonically treated, and the system is transparent, uniform and stable, and the color of the liquid is yellow (color mainly determined by the concentration of GO in the solution).

[0073] From figure 2 (a') and figu...

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Abstract

The invention discloses a method for improving the interface performance of a resin matrix and carbon fibers, and belongs to the field of composite materials. Graphene oxide is adopted to modify the surface interface of the carbon fibers, so that a carbon fiber reinforced resin matrix composite material with high interface shear strength and interlayer shear strength is obtained. The carbon fiber reinforced resin-based composite material is prepared from graphene oxide modified carbon fibers, a resin matrix and a curing agent as raw materials, and the graphene oxide modified carbon fibers are obtained from graphene oxide modified carbon fibers with the transverse size of 50-50000 nm. The method has outstanding advantages in the aspect of enhancing the interface performance of the carbon fiber composite material, can meet the high-temperature forming requirement of high-heat-resistance resin, and has important application prospects in preparation of various high-performance resin-based composite materials. The graphene oxide modified carbon fiber reinforced resin matrix composite material is excellent in interlaminar shear performance and can be applied to the fields of aerospace, rail transit, automobiles, energy sources, ships and the like.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a method for improving the interface properties of a resin matrix and carbon fibers, and a carbon fiber reinforced resin-based composite material with high interfacial shear strength and interlayer shear strength obtained by using the method. Background technique [0002] Carbon fiber reinforced resin matrix composites (CFRPs) have been widely used in aerospace, automotive and marine industries due to their light weight, high specific strength, high specific modulus, good corrosion resistance, strong designability, and easy processing. Widespread concern. The resin matrix used in carbon fiber reinforced resin matrix composites is divided into two categories: thermosetting resins and thermoplastic resins. At present, thermosetting resins are mainly used. Among thermosetting resins, epoxy resin has the advantages of excellent bonding performance, good dimensional sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74C08J5/06C08K9/02C08K7/06C08L63/02D06M101/40
CPCD06M11/74C08J5/06D06M2101/40D06M2200/40C08J2363/02C08K9/02C08K7/06
Inventor 邹华维邱宝伟梁梅张雪琴孙通
Owner SICHUAN UNIV
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