Modified carbon fiber reinforced polymer matrix composite material
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A technology of fiber reinforcement and composite materials, applied in the field of composite materials, can solve problems such as high cost and complicated preparation process, and achieve the effects of increased strength, increased tensile strength of monofilaments, and reduced contact angle
Active Publication Date: 2022-04-01
SICHUAN UNIV
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However, the ILSS of the composite material prepared by this method needs to be further improved
In addition, the method reported in the literature requires multiple layers of self-assembled GO / SiO on the surface of carbon fibers. 2 Multi-layer film, the preparation process is more complicated and the cost is higher
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Embodiment 1
[0052] Embodiment 1, prepare the carbon fiber after chitosan encapsulation
[0053] Step 1: Preparation of OCFs
[0054] Sizing carbon fiber T700 (purchased from Japan Toray Co., Ltd.) was refluxed in acetone at 90° C. for 60 h by Soxhlet extraction method, and then vacuum-dried overnight at 80° C. for later use. The desized carbon fibers are named DCFs. Subsequently, the DCFs were placed in AgNO at 70 °C 3 / K 2 S 2 o 8 solution (in solution, AgNO 3 The concentration is 0.01mol / L, K 2 S 2 o 8 concentration of 0.1mol / L) for 1h, and then repeatedly washed with deionized water and dried to obtain oxidized DCFs, named OCFs.
[0055] Step 2: Preparation of OCFs-CS1
[0056] Prepare an aqueous acetic acid solution with a concentration of 3mol / L, dissolve 30mg of chitosan (CS) in 100mL of the above aqueous acetic acid solution, mix thoroughly under ultrasound, immerse OCFs in the mixed liquid, soak and sizing at room temperature for 5min. After washing, vacuum-dry overnigh...
Embodiment 2
[0057] Embodiment 2, prepare the carbon fiber after chitosan encapsulation
[0058] According to the method of embodiment 1, difference only is that the consumption of chitosan in the second step is revised to 59mg from 30mg, makes the carbon fiber after chitosan encapsulation, named after OCFs-CS2.
Embodiment 3
[0059] Embodiment 3, prepare the carbon fiber after chitosan encapsulation
[0060] According to the method of embodiment 1, difference only is that the consumption of chitosan in the second step is revised to 89mg from 30mg, makes the carbon fiber after chitosan encapsulation, named after OCFs-CS3.
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Abstract
The invention provides a modified carbon fiber reinforced polymer-based composite material, and belongs to the field of composite materials. According to the invention, the oxidized carbon fiber is encapsulated by using the biomass polymer to obtain the modified carbon fiber OCFs-CS, and the interlaminar shear strength of the carbon fiber composite material prepared by compounding the OCFs-CS as the reinforcing fiber and the resin matrix is greatly improved, and the carbon fiber composite material has excellent mechanical strength. According to the preparation method disclosed by the invention, carbon nanotubes are further grafted on OCFs-CS to obtain modified carbon fibers OCFs-CS-CNTs, and the mechanical strength of the carbon fiber composite material prepared by compounding the OCFs-CS-CNTs serving as reinforced fibers and a resin matrix is further improved. The modified carbon fiber reinforced polymer-based composite material disclosed by the invention has excellent interface performance and mechanical strength, and has a wide application prospect in the fields of aerospace, transportation tools, energy equipment and the like.
Description
technical field [0001] The invention belongs to the field of composite materials, in particular to a modified carbon fiber reinforced polymer-based composite material with improved mechanical properties and interface properties. Background technique [0002] Carbon fiber reinforced polymer matrix composites (CFRP) are widely used in aerospace, energy, sports equipment and other fields due to their high strength, light weight, and good environmental stability. The interface properties of CFRP are crucial to its mechanical behavior. An excellent interface can transfer the load from the resin matrix to the fiber, reduce stress concentration, and improve the interface performance of the composite material. However, chemically inert and smooth fiber surfaces lead to poor wettability, and the interfacial-matrix bonding strength is too weak to efficiently transfer loads from the matrix to the fibers. [0003] In order to improve the interfacial properties between carbon fiber and ...
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