A kind of carbon fiber surface sizing agent and its application
A carbon fiber and sizing agent technology, applied in the direction of carbon fiber, fiber treatment, fiber type, etc., can solve the problems that organic sizing agent cannot be completely dissolved in water, affect the sizing effect, precipitation, etc., and achieve good thermal conductivity, good toughness, and reduce pollution. Effect
Active Publication Date: 2020-03-31
JIANGSU AOSHENG COMPOSITE MATERIALS HI TECH
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Problems solved by technology
Although water-based emulsion sizing agents can reduce the pollution of organic solvents to the environment, organic sizing agents are not completely soluble in water after all, and will reunite or even precipitate when stored for a certain period of time, affecting the sizing effect
Method used
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Embodiment 1-10
[0051] Prepare the carbon fiber sizing agent of the present invention according to the raw materials and formula in Table 1 according to the following steps:
[0052] 1. Combine polyacids and polyols (equal mol ratio) to synthesize furyl-containing polyesters with catalyst Sb 2 o 3 (the content is 0.2mol% of the polybasic acid) mix well and heat up to 105°C for a certain period of time to obtain a polyester prepolymer with a viscosity of 1000-10000mPa·s at 25°C.
[0053] 2. Mix and stir the furyl-containing polyester prepolymer with the furyl-containing epoxy compound, diglycidyl ether and metal oxide powder at 25°C to obtain a thermally conductive carbon fiber surface sizing agent.
[0054] Table 1 (based on 100 parts by weight of furyl-containing polyester)
[0055]
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Abstract
Disclosed by the present invention are a carbon fiber surface sizing agent and an application thereof in a carbon fiber. Raw materials of the carbon fiber surface sizing agent comprise 100 parts by weight of furan group-containing polyester and 5-20 parts by weight of furan group-containing epoxy compounds. Raw materials of the carbon fiber surface sizing agent further comprise one or a combination of 5-25 parts by weight of polyethylene glycol diglycidyl ether and polypropylene glycol diglycidyl ether. Raw materials of the carbon fiber surface sizing agent further comprise 5-20 parts by weight of a metal oxide powder having a particle diameter of less than 100 nm. The sizing agent provided by the present invention contains furan group-containing polyester which is a liquid at normal temperature. Therefore, there is no need to use an organic solvent or water, the pollution to the environment from the treatment of the organic solvents or waste water is reduced, and costs are saved. The furan group in the sizing agent provided by the present invention may raise the thermal conductivity of resin, carbon fiber still has good thermal conductivity after sizing, and the sizing agent may be used as a heat conductive material.
Description
technical field [0001] The invention relates to the field of carbon fibers, in particular to a carbon fiber surface sizing agent and its application. Background technique [0002] Carbon fiber is an inorganic fiber material with a carbon mass fraction of more than 90%. It has the advantages of high strength, high specific modulus, high temperature corrosion resistance, and good electrical and thermal conductivity. It is widely used in aerospace, transportation and other industries. However, carbon fiber is a brittle material, which is easy to fluff and break during processing, resulting in a decrease in the mechanical properties of carbon fiber products. Therefore, in order to solve this problem, in the production process of carbon fiber, the surface of carbon fiber must be sizing treatment, and a layer of organic film material is wrapped on the surface of carbon fiber, which can improve the aggregation and wear resistance of carbon fiber, and reduce fuzzing and fracture. A...
Claims
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IPC IPC(8): D06M15/507D06M13/402D06M15/53D06M11/45D06M11/47C08L63/00C08K9/04C08K9/02C08K7/06C08J5/06D06M101/40
CPCC08J5/06C08J2363/00C08K7/06C08K9/02C08K9/04C08K9/08D06M11/45D06M11/47D06M13/402D06M15/507D06M15/53D06M2101/40D06M2200/40
Inventor 严兵赵清新施刘生郎鸣华何定军张林强刘腾达刘圣强张可可钱馨馨
Owner JIANGSU AOSHENG COMPOSITE MATERIALS HI TECH