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Carbon fiber-based composite continuous fiber as well as preparation method and applications thereof

A continuous fiber and carbon fiber technology, applied in the direction of carbon fiber, fiber treatment, fiber type, etc., can solve the problems of insufficient strength, poor thermal conductivity, raw material price, and high cost of preparation process, and achieve the effect of controlling cost and reducing sintering temperature.

Inactive Publication Date: 2020-03-24
SUZHOU NANODISPERSIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has good thermal conductivity and is non-conductive, but its strength is less than 1.5GPa, and the raw material price and preparation process cost are very expensive
However, the carbon fibers used in this application are discontinuous fibers, and the aluminum nitride fibers obtained as a template are also discontinuous fibers, and the prepared aluminum nitride fibers have poor mechanical properties and cannot meet the requirements of continuous fibers.
[0005] Another continuous alumina fiber is a non-conductive ceramic fiber, but its thermal conductivity is poor

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  • Carbon fiber-based composite continuous fiber as well as preparation method and applications thereof

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preparation example Construction

[0022] Such as figure 1 As shown, the embodiment of the present invention relates to a preparation method of carbon fiber aluminum nitride composite continuous fiber, including the following steps:

[0023] S1: Use a silane coupling agent to perform surface water-repellent treatment on aluminum nitride powder, add the surface-water-repellent aluminum nitride powder to the aluminum sol in a certain proportion, stir well to obtain a slurry; introduce the obtained slurry Used for circulating sizing in the first sizing machine;

[0024] S2, in an inert gas atmosphere, desizing the continuously fed carbon fiber at a temperature of 500-800℃, the desizing residence time is 1 to 3 min, and remove the protective slurry on the surface of the carbon fiber (mostly epoxy resin system) for sizing ; After desizing, the carbon fiber is drawn by the drafting machine to the first sizing machine, and sizing is performed once, and the sizing residence time is 1 to 3 minutes;

[0025] S3, the carbon fi...

Embodiment 1

[0033] S1: Take a spherical aluminum nitride powder with an average particle size of 500nm and use a silane coupling agent for surface modification and water-proof treatment; then add the solid content of 10% according to the weight ratio of aluminum nitride powder to aluminum sol 3:7 In the aluminum sol, mix and stir uniformly to obtain a slurry; introduce the prepared slurry into the first sizing machine, adjust the sizing temperature to 25°C, and circulate the circulating pump;

[0034] S2, continuous feeding of T300 continuous carbon fiber, the T300 continuous carbon fiber is drawn into a high-temperature furnace through a drafting machine, the high-temperature furnace temperature is 500℃, the carbon fiber residence time is 2 minutes, and the carbon fiber surface protection slurry is continuously removed; after desizing, the carbon fiber passes through The drafting machine draws to the first sizing machine for one sizing, and the sizing residence time is 1 min;

[0035] S3, the...

Embodiment 2

[0039] S1: Take a spherical aluminum nitride powder with an average particle size of 500nm, and use a silane coupling agent for surface modification and water-proof treatment; then add the solid content of 10% according to the weight ratio of aluminum nitride powder to aluminum sol 1:9 In the aluminum sol, mix and stir uniformly to obtain a slurry; introduce the prepared slurry into the first sizing machine, adjust the sizing temperature to 25°C, and circulate the circulating pump;

[0040] S2, continuous feeding of T300 continuous carbon fiber, the T300 continuous carbon fiber is drawn into a high-temperature furnace through a drafting machine, the high-temperature furnace temperature is 500℃, the carbon fiber residence time is 2 minutes, and the carbon fiber surface protection slurry is continuously removed; after desizing, the carbon fiber passes through The drafting machine draws to the first sizing machine for one sizing, and the sizing residence time is 1 min;

[0041] S3, th...

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Abstract

The invention discloses a carbon fiber-based composite continuous fiber as well as a preparation method and applications of the carbon fiber-based composite continuous fiber, and belongs to the technical field of composite materials. The preparation method of the carbon fiber-based composite continuous fiber comprises the following steps: S1, adding ceramic matrix powder subjected to surface waterproofing treatment into aluminum sol, carrying out sufficient and uniform stirring to obtain slurry, and introducing the obtained slurry into a first sizing machine for circulating sizing; S2, carrying out high-temperature desizing on carbon fibers, drafting the carbon fibers after desizing to the first sizing machine through a drafting machine, and carrying out primary sizing; S3, drafting the carbon fibers after primary sizing into a high-temperature furnace through the drafting machine, and carrying out continuous sintering in inert gas atmosphere to obtain a composite fiber; and S4, drafting the composite fiber to a second sizing machine through the drafting machine for secondary sizing, and then carrying out drying and fiber collecting to obtain the carbon fiber-based composite continuous fiber. According to the technical scheme, alumina sol is used as an adhesive between the ceramic matrix powder and between the powder and the carbon fibers, so the sintering temperature of the ceramic matrix powder is effectively reduced.

Description

Technical field [0001] The invention relates to a technology in the field of composite materials, in particular to a composite continuous fiber based on carbon fiber, and a preparation method and application thereof. Background technique [0002] Carbon fiber is a good electrical conductor with the advantages of high strength and high modulus. Pitch-based carbon fiber is also a good heat conductor. However, in some fields, high thermal conductivity and non-conductive fibers are required, and carbon fibers cannot be used at this time. [0003] For example, the silicon nitride continuous fiber mentioned in the Chinese patent application CN201610848803.1 is prepared by using PCS fiber as a raw material, through electron beam irradiation, nitriding and decarburizing in an ammonia atmosphere, and high-temperature sintering. It has good thermal conductivity and is non-conductive, but its strength is less than 1.5 GPa. In addition, the price of raw materials and the cost of the preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/45D06M11/58D06M101/40
CPCD06M11/45D06M11/58D06M2101/40D06M2200/40
Inventor 吴永龙王振朱堂龙王宇湖
Owner SUZHOU NANODISPERSIONS