Carbon fiber coated with sizing agent, method for producing carbon fiber coated with sizing agent, prepreg, and carbon fiber-reinforced composite material
A manufacturing method and technology of prepregs, which are applied in the fields of carbon fiber manufacturing methods, carbon fiber reinforced composite materials, prepregs and carbon fibers, can solve problems such as low reactivity and difficulty in achieving high adhesion of matrix resins, and achieve Less change over time, excellent adhesion, excellent heat resistance and strength properties
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Embodiment 1
[0439] This embodiment includes the following I process, II process and III process.
[0440] ・Step I: A step of manufacturing carbon fiber used as a raw material
[0441] A copolymer composed of 99 mol% of acrylonitrile and 1 mol% of itaconic acid was dry-wet spun and fired to obtain a total number of filaments of 24,000, a total fineness of 1,000Tex, a specific gravity of 1.8, and a strand tensile strength of 5.9GPa. Carbon fibers with a tensile modulus of elasticity of 295GPa. Next, the carbon fiber was subjected to electrolytic surface treatment under the condition that an aqueous solution of ammonium bicarbonate with a concentration of 0.1 mol / l was used as an electrolytic solution and the electric quantity was 80 coulombs per 1 g of carbon fiber. The carbon fibers subjected to the electrolytic surface treatment were then washed with water and dried in heated air at a temperature of 150° C. to obtain carbon fibers as raw materials. At this time, the surface oxygen conce...
Embodiment 2～8
[0448] ・Step I: A step of producing carbon fiber used as a raw material
[0449] It carried out similarly to Example 1.
[0450] ・The second step: the step of attaching the sizing agent to the carbon fiber
[0451] Carbon fibers coated with a sizing agent were obtained in the same manner as in Example 1 except that the component (B1) shown in Table 1 was used as the sizing agent. Next, measure the epoxy equivalent of the sizing agent, measure the surface of the sizing agent by X-ray photoelectron spectroscopy, interfacial shear strength (IFSS) of the carbon fiber coated with the sizing agent, and the mixture of the sizing agent and latent curing agent (E) The rising temperature (ΔTg) of the glass transition temperature, the amount of aliphatic epoxy compound (A) eluted from the carbon fiber coated with the sizing agent. It can be seen that the epoxy equivalent of the sizing agent, the chemical composition of the sizing agent surface, ΔTg, and the elution amount of the alipha...
Embodiment 9～13
[0457] ・Step I: A step of producing carbon fiber used as a raw material
[0458] It carried out similarly to Example 1.
[0459] ・The second step: the step of attaching the sizing agent to the carbon fiber
[0460] Carbon fibers coated with a sizing agent were obtained in the same manner as in Example 1 except that the component (A) shown in Table 2 was used as the sizing agent. Next, measure the epoxy equivalent of the sizing agent, measure the surface of the sizing agent by X-ray photoelectron spectroscopy, interfacial shear strength (IFSS) of the carbon fiber coated with the sizing agent, and the mixture of the sizing agent and latent curing agent (E) The rising temperature (ΔTg) of the glass transition temperature, the amount of aliphatic epoxy compound (A) eluted from the carbon fiber coated with the sizing agent. It can be seen that the epoxy equivalent of the sizing agent, the chemical composition of the sizing agent surface, ΔTg, and the elution amount of the aliphat...
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Abstract
Description
Claims
Application Information
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