Carbon fiber treatment agent composition, carbon fiber treatment agent, method for producing same, and carbon fiber precursor

Abstract

The invention provides a carbon fiber treatment agent composition, a carbon fiber treatment agent, a manufacturing method thereof and a carbon fiber precursor. The carbon fiber treating agent composition comprises modified polysiloxane with at least one modified functional group, a dispersing agent and water. Based on 100 wt% of the modified polysiloxane, the dispersant is 10 wt% to 50 wt%. The dispersant has a structure as shown in formula (I). The modified polysiloxane is dispersed in water through the dispersing agent with a specific structure, so that the carbon fiber treating agent has better emulsification stability and thermal stability.

Description

Technical Field

[0001] This invention relates to a carbon fiber treatment agent composition, and more particularly to a carbon fiber treatment agent composition, a carbon fiber treatment agent, a method for manufacturing the same, and a carbon fiber precursor. Background Technology

[0002] Carbon fiber is a fibrous carbon material composed of over 90% carbon atoms arranged continuously along the fiber axis, giving it excellent mechanical properties. Carbon fiber is characterized by its light weight and high strength. For example, its specific gravity is about 1 / 4 that of iron, its tensile strength is about 10 times that of iron, and its tensile modulus is about 7 times that of iron. Due to these properties, carbon fiber can replace metals in applications requiring lightweight construction. Furthermore, because of its high strength, high modulus, high temperature resistance, corrosion resistance, low expansion, and dimensional stability, carbon fiber is also used as a reinforcing material to form carbon fiber reinforced materials with synthetic resins such as epoxy resins, making it applicable in aerospace, military, and high-tech fields. The demand for carbon fiber composites is expected to continue to increase.

[0003] Carbon fiber is generally produced using polyacrylonitrile (PAN)-based precursor fibers as the raw material. The processing of PAN precursor fibers involves stretching, high-temperature treatment, oxidation, and carbonization. However, carbon fiber precursor fibers are prone to softening during high-temperature calcination, and they are also susceptible to friction against roller surfaces during processing and transportation, leading to fuzz and other defects, thus reducing the quality of the resulting carbon fiber.

[0004] To prevent the aforementioned defects, carbon fiber treatment agents must be used to adjust the frictional properties of carbon fiber precursors to prevent and / or eliminate the accumulation of static electricity, thereby assisting in the production of carbon fiber precursors. The carbon fiber treatment agent can form a film on the carbon fiber surface, preventing adhesion and friction between carbon fiber precursors, thus avoiding the generation of defects in the carbon fiber.

[0005] Existing carbon fiber treatment agents are mainly composed of amino-based polysiloxanes. However, due to the high viscosity of amino-based polysiloxanes, they must be dissolved in a solvent to coat the carbon fiber precursor. However, amino-based polysiloxanes are hydrophobic, so organic solvents must be used. Organic solvents are typically flammable and volatile, which may pose safety and pollution risks.

[0006] In view of this, there is an urgent need to provide a carbon fiber treatment agent composition, a carbon fiber treatment agent and its manufacturing method to address safety issues, improve environmental friendliness, and still be effectively applied in carbon fiber processes. Summary of the Invention

[0007] One aspect of the present invention is to provide a carbon fiber treatment agent composition, which uses a dispersant to disperse modified polyorganosiloxane in water without the use of organic solvents.

[0008] Another aspect of the present invention is to provide a method for manufacturing a carbon fiber treatment agent, wherein a modified polyorganosiloxane is first mixed with a dispersant and then dispersed in water.

[0009] Another aspect of the present invention is to provide a carbon fiber treatment agent, which is prepared by the above method.

[0010] Another aspect of the present invention is to provide a carbon fiber precursor, which is coated with the carbon fiber treatment agent described above.

[0011] According to one aspect of the present invention, a carbon fiber treatment agent composition is provided, comprising a modified polyorganosiloxane having at least one modified functional group, a dispersant, and water. The modified polyorganosiloxane is 100 wt%, and the dispersant is 10 wt% to 50 wt%. The dispersant has the structure shown in formula (I):

[0012]

[0013] In formula (I), R1 represents a straight-chain, cyclic, or branched aliphatic hydrocarbon, ether chain, or cyclic ether chain with 2 to 10 carbon atoms; R2 represents a straight-chain, cyclic, or branched aliphatic hydrocarbon, cyclic ether chain, alicyclic hydrocarbon, or aromatic hydrocarbon with 2 to 30 carbon atoms, whether substituted or unsubstituted; X represents alkyl, hydroxyl, sulfonic acid, carboxylic acid and their salts, primary amines, secondary amines, tertiary amines and their salts, quaternary ammonium salts, alkyl dimethylbenzene quaternary ammonium salts, alkyl trimethyl quaternary ammonium salts, dialkyl dimethyl quaternary ammonium salts, ester quaternary ammonium salts, and imidazoline quaternary ammonium salts; m represents an integer from 1 to 10; and n represents an integer from 1 to 30.

[0014] According to one embodiment of the present invention, the above-mentioned carbon fiber treatment agent composition further includes additives, including a pH adjuster. The modified polyorganosiloxane is 100 wt%, and the additives are 1 wt% to 3 wt%.

[0015] According to an embodiment of the present invention, the functional group equivalent of at least one functional group of the modified polyorganosiloxane is from 1000 g / mol to 12000 g / mol, and the viscosity of the modified polyorganosiloxane is 200 mm. 2 / s to 10000mm 2 / s.

[0016] According to one embodiment of the present invention, the dispersant comprises a cationic surfactant, a nonionic surfactant, or a combination thereof, wherein the molecular weight of the dispersant is from 150 g / mol to 5000 g / mol, and the HLB value of the dispersant is from 9.5 to 14.

[0017] According to another aspect of the present invention, a method for manufacturing a carbon fiber treatment agent is provided. The method includes premixing a modified polyorganosiloxane and a dispersant to obtain a premix; and dispersing the premix and water to obtain the carbon fiber treatment agent, wherein the weight ratio of water to the premix is ​​5 to 99.

[0018] According to one embodiment of the present invention, the above-mentioned premixing operation includes mixing at a temperature of 20°C to 60°C and a stirring speed of 500 rpm to 3000 rpm for 10 minutes to 60 minutes.

[0019] According to one embodiment of the present invention, the above dispersion operation includes adding water at a temperature of 20°C to 60°C and a stirring speed of 500 rpm to 3000 rpm, and mixing for 30 minutes to 120 minutes.

[0020] According to another aspect of the present invention, a carbon fiber treatment agent is provided, which is prepared by the method described above, wherein the emulsion particle size of the carbon fiber treatment agent is less than 400 nm.

[0021] According to one embodiment of the present invention, the migration rate of the carbon fiber treatment agent is less than 30% / hour.

[0022] According to another aspect of the present invention, a carbon fiber precursor is provided, which is coated with the carbon fiber treatment agent of the above-described aspect, wherein the carbon fiber precursor is coated with 0.1 wt% to 5 wt% of the carbon fiber treatment agent.

[0023] The carbon fiber treatment agent composition, carbon fiber treatment agent, its manufacturing method and carbon fiber precursor of the present invention utilize a dispersant with a specific structure to disperse modified polyorganosiloxane in water without the use of organic solvents, which can reduce pollution problems, improve safety, and improve the emulsification stability and thermal stability of the carbon fiber treatment agent. Detailed Implementation

[0024] The manufacture and use of embodiments of the present invention are discussed in detail below. However, it will be understood that the embodiments provide many applicable inventive concepts that can be implemented in a wide variety of specific contexts. The specific embodiments discussed are for illustrative purposes only and are not intended to limit the scope of the invention.

[0025] As used in this invention, “around,” “about,” “approximately,” or “substantially” generally mean within 20 percent, 10 percent, or 5 percent of the stated value or range.

[0026] As described above, the present invention provides a carbon fiber treatment agent composition, a carbon fiber treatment agent, a method for manufacturing the same, and a carbon fiber precursor. The present invention utilizes a dispersant with a specific structure to disperse modified polyorganosiloxane in water without the use of organic solvents, thereby reducing pollution problems, improving safety, and improving the emulsification stability and thermal stability of the carbon fiber treatment agent.

[0027] The carbon fiber treatment agent composition provided by this invention comprises a modified polyorganosiloxane, a dispersant, and water. The modified polyorganosiloxane is modified with at least one modifying functional group. In some embodiments, the modifying functional group may be, for example, an amino group, an epoxy group, or a carboxylic acid group, which helps improve the properties of the emulsion, such as water solubility and compatibility. In some embodiments, the functional group equivalent of the modified polyorganosiloxane is from about 1000 g / mol to about 12000 g / mol. When the functional group equivalent of the modified polyorganosiloxane is within the aforementioned range, the modified polyorganosiloxane can possess suitable reactivity for crosslinking and film formation.

[0028] Modified polyorganosiloxanes are special silicone oils with the properties of dimethyl silicone oil. They can incorporate various organic functional groups, thus possessing properties such as water solubility, compatibility, reactivity with different organic materials, coatability, and lubricity. In some specific examples, modified polyorganosiloxanes can be Shin-Etsu Chemical Co., Ltd.'s KF-864, KF-865, KF-868, KF-859, KF-393, KF-860, KF-880, KF-8004, KF-8002, KF-8005, KF-867, KF-869, KF-861, KF-877, X-22-3820W, and X-22-3939A, etc.; Mitsubishi Chemical Group... DMS-A11, DMS-A12, DMS-A15, DMS-A21, DMS-A31, DMS-A32, DMS-A35, DMS-A32R, DMS-A211, DMS-A214, AMS-A132, AMS-A152, AMS-A162, AMS-A163, AMS-A191, AMS-A1203, AMS-A233, AMS-A2202, AMS-42, ATM-1112, ATM-1322, UBS-0541, and UBS-0822 manufactured by Dow Corning (DOWN). CORNING manufactures the DOWSIL series, such as BY16-205, BY-16-849, FZ-3710, FZ-3760, FZ-3785, BY16-891, and FZ-3789.

[0029] In some embodiments, the viscosity of the modified polyorganosiloxane is approximately 200 mm. 2 / s to approximately 10000mm2 The viscosity ( / s) depends on the dispersant used. Modified polyorganosiloxanes with the aforementioned viscosity range are more likely to emulsify with dispersants and disperse in water.

[0030] In some embodiments, based on 100 wt% of the modified polysiloxane, the dispersant is approximately 10 wt% to approximately 50 wt%, preferably approximately 20 wt% to approximately 45 wt%. If the amount of dispersant is too small (e.g., less than 10 wt%), it will affect the emulsification effect and emulsion stability of the modified polysiloxane; conversely, if the amount of dispersant is too large (e.g., more than 50 wt%), it will affect the effectiveness of the carbon fiber treatment agent and cause a decrease in the thermal stability of the carbon fiber treatment agent. The choice of dispersant affects the emulsion stability and thermal stability of the carbon fiber treatment agent. The dispersant has the structure shown in formula (I):

[0031]

[0032] In formula (I) above, R1 represents a straight-chain, cyclic, or branched aliphatic hydrocarbon, ether chain, or cyclic ether chain with 2 to 10 carbon atoms; R2 represents a straight-chain, cyclic, or branched aliphatic hydrocarbon, cyclic ether chain, alicyclic hydrocarbon, or aromatic hydrocarbon with 2 to 30 carbon atoms, whether substituted or unsubstituted; X represents alkyl, hydroxyl, sulfonic acid, carboxylic acid and their salts, primary amines, secondary amines, tertiary amines and their salts, quaternary ammonium salts, alkyl dimethylbenzene quaternary ammonium salts, alkyl trimethyl quaternary ammonium salts, dialkyl dimethyl quaternary ammonium salts, ester quaternary ammonium salts, and imidazoline quaternary ammonium salts; m represents an integer from 1 to 10; and n represents an integer from 1 to 30.

[0033] In some embodiments, the dispersant may be a cationic surfactant, a nonionic surfactant, or a combination thereof. In some specific examples, the cationic surfactant comprises primary amines, secondary amines, tertiary amines and their salts, quaternary ammonium salts, alkyl dimethylbenzene quaternary ammonium salts, alkyl trimethyl quaternary ammonium salts, dialkyl dimethyl quaternary ammonium salts, ester quaternary ammonium salts, imidazoline quaternary ammonium salt dispersants or surfactants, or combinations thereof. For example, the cationic surfactant may be SINONATE SH50, SINONATE 962SF, or SINONATE 960SF manufactured by Chunghwa Synthetic Chemicals; or Disponil LDBS19, Disponil LDBS25, or Disponil LDBS 55 manufactured by BASF.

[0034] In some specific examples, nonionic surfactants include higher alcohol ethylene oxide additives, copolymers of polyoxyethylene ethers and polyoxypropylene ethers, long-chain enols, copolymers of long-chain polyoxyethylene ethers and polyoxypropylene ethers, polyethylene glycol styrene aromatic ethers, polyethylene glycol octylphenyl ether, polyethylene glycol nonylphenyl ether, polyethylene glycol stearate, polyethylene glycol bisphenol A derivatives, or combinations thereof. For example, nonionic surfactants can be the SINOPOL series manufactured by Chunghwa Synthetic Chemicals, such as SINOPOL1303, SINOPOL1305, SINOPOL1306, SINOPOL1307, SINOPOL1309, SINOPOL1310, SINOPOL1315, SINOPOL1802, SINOPOL1803, SINOPOL1805, SINOPOL1807, SINOPOL1815, SINOPOL1816, SINOPOL1820, SINOPOL1822, and SINOPOL18; or Lutensol AT11, Lutensol AT18, Lutensol AT25, Lutensol AT400, and Lutensol AT50 manufactured by BASF.

[0035] In some embodiments, the molecular weight of the dispersant is from about 150 g / mol to about 5000 g / mol, preferably from about 150 g / mol to about 2000 g / mol. In some embodiments, the HLB value of the dispersant is from about 9.5 to about 14. Having the molecular weight and / or HLB value of the dispersant within the aforementioned range helps to improve the dispersibility of the modified polyorganosiloxane.

[0036] In some embodiments, the carbon fiber treatment agent composition may selectively include additives, such as pH adjusters, for example, formic acid, acetic acid, propionic acid, lactic acid, or citric acid. In some embodiments, the additives are 1 wt% to 3 wt% based on 100 wt% modified polyorganosiloxane. The addition of the aforementioned amounts of additives can be used to adjust the pH of the carbon fiber treatment agent, ionize it, and improve its emulsification stability. In some embodiments, the pH of the carbon fiber treatment agent needs to be adjusted to about 6 to about 8.

[0037] The present invention also provides a method for manufacturing a carbon fiber treatment agent. The method includes premixing a modified polyorganosiloxane and a dispersant to obtain a premix. In some embodiments, the premixing operation includes mixing the modified polyorganosiloxane and the dispersant at a temperature of about 20°C to about 60°C and a stirring speed of about 500 rpm to about 3000 rpm for about 10 minutes to about 60 minutes. Premixing under the aforementioned conditions helps to ensure that the modified polyorganosiloxane and the dispersant are mixed uniformly.

[0038] Next, the method includes dispersing the premix and water to obtain a carbon fiber treatment agent. In some embodiments, the weight ratio of water to the premix is ​​from about 6 to about 9. In some embodiments, the dispersion operation includes adding water and mixing for about 30 minutes to about 120 minutes at a temperature of about 20°C to about 60°C and a stirring speed of about 500 rpm to about 3000 rpm. In the foregoing embodiments, the water droplet rate is from about 0.1 mL / min to about 10 mL / min. Premixing under the aforementioned conditions helps to effectively disperse the modified polyorganosiloxane in water. In some embodiments, additives may be added during the premixing and / or dispersion operations.

[0039] The carbon fiber treatment agent prepared using the above-described composition and method exhibits good emulsion stability. Emulsion stability can be evaluated based on the emulsion particle size and migration rate. In some embodiments, the emulsion particle size of the carbon fiber treatment agent is less than about 400 nm, preferably less than about 150 nm, and more preferably less than about 100 nm. In some embodiments, the migration rate of the carbon fiber treatment agent is less than about 30% / hour, preferably less than about 29.5% / hour.

[0040] In some embodiments, a carbon fiber tow is oiled at room temperature using a carbon fiber treatment agent to obtain a carbon fiber precursor, such that the carbon fiber precursor is coated with about 0.1 wt% to about 5 wt% of the carbon fiber treatment agent. The carbon fiber precursor can then undergo subsequent steps such as heating, stretching, carbonization, pickling, electrolysis, washing, and drying to produce carbon fibers.

[0041] The following examples illustrate the application of the present invention, but are not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention.

[0042] Manufacturing of carbon fiber treatment agents

[0043] Example 1

[0044] A mixture of amino-modified polyorganosiloxane DAS-1 and dispersant C3 was premixed at speeds ranging from 500 rpm to 3000 rpm to prepare a premix. The amount of amino-modified polyorganosiloxane DAS-1 was 100 wt%, and the amount of dispersant C3 was 35 wt%. The functional group equivalent of amino-modified polyorganosiloxane DAS-1 was 2000, while dispersant C3 was a cationic surfactant. The physical properties of dispersant C3 are detailed in Table 1 and will not be repeated here.

[0045] Next, while maintaining the premix at a rotation speed of 500 rpm to 10,000 rpm, deionized water is added dropwise at a rate of 0.1 mL / min to 10 mL / min to obtain an aqueously dispersed amine-modified polysiloxane, wherein the weight of the deionized water is 2 to 5 times the weight of the premix. Then, while maintaining the rotation speed of 500 rpm to 10,000 rpm, deionized water and additives are added dropwise to obtain a carbon fiber treatment agent, wherein the weight of the deionized water and additives is 5 to 99 times the weight of the aqueously dispersed amine-modified polysiloxane.

[0046] Then, the carbon fiber tow is oiled using the obtained carbon fiber treatment agent to obtain carbon fiber precursor.

[0047] Examples 2 to 9 and Comparative Examples 1 to 2

[0048] Examples 2 to 9 and Comparative Example 1 were prepared using a process similar to that of Example 1 to manufacture carbon fiber treatment agents. The difference was that Examples 2 to 9 and Comparative Example 1 used different amine-modified polysiloxanes and dispersants. In Comparative Example 1, dispersant A1 was disodium lauryl ether succinate (an anionic surfactant). The functional group equivalent of the amine-modified polysiloxane DAS-2 was 6000. The physical properties of the dispersants used in Examples 2 to 9 and Comparative Example 1 are detailed in Table 1. Dispersants C1 to C3 are selected from the group consisting of sulfonates, alkylphenol ether sulfates, sodium alkylbenzene sulfonates, and combinations thereof. Dispersants N1 to N3 are selected from the group consisting of fatty alcohol polyoxyethylene ethers and fatty alcohol polyoxyethylene glycol ethers, and combinations thereof. The amounts of each component in Examples 2 to 9 and Comparative Examples 1 and 2 are detailed in Tables 2 and 3, and will not be repeated here.

[0049] Comparative Example 2 did not use a carbon fiber treatment agent during the oiling step, so Comparative Example 2 only has the evaluation results for carbon fiber.

[0050] Evaluation method

[0051] Particle size of carbon fiber treatment agent emulsion

[0052] The emulsion particle size of the carbon fiber treatment agent was measured using a particle size analyzer (Brookhaven, model 90Plus / BI-MAS) to evaluate the emulsion stability of the carbon fiber treatment agent. Smaller emulsion particle size indicates better emulsification and thus better emulsion stability. The emulsion particle size evaluation results for Examples 1 to 9 and Comparative Example 1 are shown in Tables 2 and 3.

[0053] migration rate of carbon fiber treatment agent

[0054] The change in penetration of the carbon fiber treatment agent was measured using a stability analyzer (LUMiSizer 651, manufactured by LUM Corporation) to calculate the migration rate of emulsion particles in the carbon fiber treatment agent (in % / hour), thereby evaluating the emulsion stability of the carbon fiber treatment agent. A slower migration rate indicates better emulsion stability of the carbon fiber treatment agent, resulting in a longer storage time. The migration rate evaluation results for Examples 1 to 9 and Comparative Example 1 are shown in Tables 2 and 3.

[0055] thermal stability

[0056] The thermogravimetric loss (TGA) of the slurry layer formed by the carbon fiber treatment agent was measured under nitrogen atmosphere at 275°C and 430°C for 30 minutes, with the initial weight of the carbon fiber treatment agent as 100% by weight. A smaller TGA indicates better thermal stability of the carbon fiber treatment agent. The thermal stability evaluation results of Examples 1 to 9 and Comparative Example 1 are shown in Tables 2 and 3.

[0057] Oil content by weight

[0058] The carbon fiber precursor was extracted using Soxhlet extraction. A solvent was used, and 10 grams of the carbon fiber precursor were extracted for 4 hours. The solvent was then evaporated to dryness, and the thermogravimetric loss was measured using TGA. The oil content by weight ratio evaluation results for Examples 1 to 9 and Comparative Example 1 are shown in Tables 2 and 3.

[0059] Feathers and broken threads

[0060] Take a 100m bundle of filaments and visually inspect it for the number of times fuzz or broken filaments appear. Evaluate the results according to the following criteria. The evaluation results of fuzz and broken filaments for Examples 1 to 9 and Comparative Examples 1 and 2 are shown in Tables 2 and 3.

[0061] ○: No feathers or broken silk.

[0062] △: The number of feathers and broken fibers is between 1 and 3. ╳: The number of feathers and broken fibers is greater than 4.

[0063] Table 1

[0064]

[0065] Table 2

[0066]

[0067] Table 3

[0068]

[0069] According to the above embodiments, the carbon fiber treatment agents prepared by using cationic surfactants and / or nonionic surfactants with specific amounts and structures of formula (I) and amine-modified polyorganosiloxanes in Examples 1 to 9 do indeed exhibit better emulsification stability and thermal stability. Furthermore, the carbon fiber precursors coated with the carbon fiber treatment agents of Examples 1 to 9 can reduce the generation of fuzz and filament breakage during high-temperature processing.

[0070] In contrast, Comparative Example 1, which used an anionic surfactant, produced a carbon fiber treatment agent with a larger emulsion particle size and faster migration rate, indicating poor emulsification effect and poor emulsion stability. Furthermore, the carbon fiber treatment agent of Comparative Example 1 exhibited a larger thermogravimetric loss, indicating poor thermal stability. Moreover, both Comparative Example 1, which used an anionic surfactant, and Comparative Example 2, which did not use a carbon fiber treatment agent, produced carbon fibers with significantly more fuzz and broken filaments.

[0071] Therefore, the carbon fiber treatment agent composition, carbon fiber treatment agent, manufacturing method thereof, and carbon fiber precursor provided by the present invention can utilize a dispersant with a specific structure to disperse the modified polyorganosiloxane in water without the use of organic solvents, thereby reducing pollution problems, improving safety, and improving the emulsification stability and thermal stability of the carbon fiber treatment agent.

[0072] Although the present invention has been disclosed above with reference to various embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A carbon fiber treatment agent composition, characterized in that, Include: Modified polyorganosiloxanes having at least one modifying functional group; The dispersant, wherein the modified polyorganosiloxane is 100 wt%, the dispersant is 10 wt% to 50 wt%, and the dispersant has the structure shown in formula (I): In formula (I), R1 represents a straight-chain, cyclic, or branched aliphatic hydrocarbon, ether chain, or cyclic ether chain with 2 to 10 carbon atoms; R2 represents a straight-chain, cyclic, or branched aliphatic hydrocarbon, cyclic ether chain, alicyclic hydrocarbon, or aromatic hydrocarbon with 2 to 30 carbon atoms, whether substituted or unsubstituted; X represents alkyl, hydroxyl, sulfonic acid, carboxylic acid groups and their salts, primary amines, secondary amines, tertiary amines and their salts, quaternary ammonium salts, alkyl dimethylbenzene quaternary ammonium salts, alkyl trimethyl quaternary ammonium salts, dialkyl dimethyl quaternary ammonium salts, ester quaternary ammonium salts, and imidazoline quaternary ammonium salts; m represents an integer from 1 to 10; and n represents an integer from 1 to 30; and water.

2. The carbon fiber treatment agent composition according to claim 1, characterized in that, Also includes: The additive includes a pH adjuster, wherein the modified polyorganosiloxane is 100 wt% and the additive is 1 wt% to 3 wt%.

3. The carbon fiber treatment agent composition according to claim 1, characterized in that, The modified polyorganosiloxane has at least one modified functional group with a functional group equivalent of 1000 g / mol to 12000 g / mol, and the modified polyorganosiloxane has a viscosity of 200 mm. 2 / s to 10000mm 2 / s.

4. The carbon fiber treatment agent composition according to claim 1, characterized in that, The dispersant comprises a cationic surfactant, a nonionic surfactant, or a combination thereof, and has a molecular weight of 150 g / mol to 5000 g / mol and an HLB value of 9.5 to 14.

5. A method for manufacturing a carbon fiber treatment agent, characterized in that, Include: The modified polyorganosiloxane and dispersant are premixed to obtain a premix; and The premix and water are dispersed to obtain the carbon fiber treatment agent, wherein the weight ratio of water to the premix is ​​5 to 99.

6. The method for manufacturing the carbon fiber treatment agent according to claim 5, characterized in that, The premixing process involves mixing for 10 to 60 minutes at a stirring speed of 500 to 3000 rpm at a temperature of 20°C to 60°C.

7. The method for manufacturing the carbon fiber treatment agent according to claim 5, characterized in that, The dispersion process involves adding the water at a temperature of 20°C to 60°C and a stirring speed of 500 rpm to 3000 rpm, and mixing for 30 to 120 minutes.

8. A carbon fiber treatment agent, characterized in that, The carbon fiber treatment agent is prepared by the method according to any one of claims 5 to 7, wherein the emulsion particle size of the carbon fiber treatment agent is less than 400 nm.

9. The carbon fiber treatment agent according to claim 8, characterized in that, The migration rate of the carbon fiber treatment agent is less than 30% / hour.

10. A carbon fiber precursor, characterized in that, The carbon fiber precursor is coated with the carbon fiber treatment agent as described in claim 8 or 9, wherein the carbon fiber precursor is coated with 0.1 wt% to 5 wt% of the carbon fiber treatment agent.

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