A kind of silicone-free oil agent for carbon fiber precursor

A carbon fiber precursor and silicone-free technology, which is applied in the field of silicone-free oil and carbon fiber precursor, can solve the problems of unsatisfactory performance of carbon fiber, poor effect of preventing monofilament adhesion, and inability to obtain high-performance carbon fiber. The effect of reducing sticking phenomenon, ensuring uniform quality and wide applicability

CN110670350BActive Publication Date: 2022-01-25HENGSHEN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-01-25

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Abstract

The invention discloses a silicone-free oil agent for carbon fiber precursors, which comprises aromatic ester compounds, aromatic polyoxyethylene ethers, and amine compounds dispersed in water at a mass ratio of 50-80:10-35:1-5. Aqueous emulsion; aromatic ester compounds include one or more of trimellitates, phthalates, hydroxybenzoates and ethoxylated bisphenol higher fatty acid esters; aromatic polyoxyethylene ethers include alkyl One or more of phenol polyoxyethylene ethers and bisphenol A polyoxyethylene ethers; amine compounds include one or more of ethoxylated lauramides and aliphatic long-chain quaternary ammonium salts; and aromatic ester compounds in the air The mass residual rate at 300°C under the atmosphere is 80-98%, and the mass ratio in the non-volatile components of the oil agent is 50-80%. It can effectively reduce the sticking degree of the raw silk during the production process, prevent the PAN monofilament from sticking to each other during the pre-oxidation process, and has a certain degree of hydrophilicity and heat resistance.
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Description

technical field

[0001] The invention relates to a silicone-free oil agent, in particular to a silicone-free oil agent for carbon fiber precursors, and belongs to the technical field of textile oil agents. Background technique

[0002] Carbon fiber is widely used in the field of advanced composite materials as a reinforcing material due to its good specific strength and specific elastic modulus. The industrial production method of carbon fiber is to pre-oxidize polyacrylonitrile (PAN) fiber bundles in an oxidative atmosphere between 200-400°C to obtain non-combustible and non-melting pre-oxidized fibers, and then heat them at a high temperature of at least 1000°C , carbonized in an inert atmosphere such as nitrogen to obtain carbon fibers.

[0003] In the pre-oxidation process, the process temperature exceeds the softening point of the PAN precursor. Under the action of heat, the PAN monofilament will soften and even melt, and adjacent monofilaments will stick to each other,...

Examples

Embodiment Construction

[0072] The present invention will be specifically introduced below in conjunction with specific embodiments.

[0073] Various evaluations and measurement methods in the present invention are as follows:

[0074] Residual rate of heat resistance: using a thermogravimetric analyzer (Netzsch, Germany, NETZSCH TG 209F3), in an air atmosphere, the temperature was raised to 400 °C at a heating rate of 10 °C / min, and the resistance at 300 °C was obtained from the obtained thermogravimetric curve. Thermal Survival Rate.

[0075] Emulsion particle size: measured using a laser particle size analyzer (Malvern, UK, Mastersizer 2000).

[0076] Carbon fiber ash content: according to the national standard GB / T 1429-2009 "Determination of Ash Content of Carbon Materials".

[0077] Roller sticking degree in the raw silk production process: continuous production for one month, count the number of times the roller surface is cleaned during the calculation period, and evaluate according to the ...