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Finishing oil for manufacturing of continuous silicone carbide fiber and application process thereof

A technology of silicon carbide fiber and oil agent, applied in fiber treatment, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of no oil agent, low molecular weight, etc., achieve simple equipment, improve performance uniformity, and process easy effect

Active Publication Date: 2009-12-30
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process of SiC fibers, for PCS fibers with low molecular weight and particularly fragile, so far, there is no suitable oil agent, and there are no relevant literature reports.

Method used

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  • Finishing oil for manufacturing of continuous silicone carbide fiber and application process thereof
  • Finishing oil for manufacturing of continuous silicone carbide fiber and application process thereof
  • Finishing oil for manufacturing of continuous silicone carbide fiber and application process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Dissolve 2.5 g of amino-modified silicone oil (AMPS according to its English abbreviation, purity 98%, pH=7.5, viscosity 1500 mPa.s) in 500 ml distilled water, stir evenly, and place it in an oil tank. After placing the continuous PCS fiber in an oven at 200°C for 2 hours, the degree of non-melting reaction (calculated based on the reaction consumption of Si-H bonds in PCS) is 65%, and the gel content in xylene is 86%. . Put 5 bundles of continuous PCS non-melting fibers obtained in this way into the oiling and bundling device, and then pass through the oil tank for oiling and bundling, and then dry them in a drying oven (temperature 120°C, time 1h), and then pass through them with high-purity nitrogen gas (Purity 99.995%) protected high-temperature furnace (furnace temperature 1300°C), fired at a high temperature at a wire speed of 0.5m / min, wound on the upper drum, and obtained continuous SiC fiber

[0040] The broken end rate of the fiber was measured to be 3.9%, an...

Embodiment 2

[0043] Take 30% epoxy-modified silicone oil emulsion (referred to as EMPS according to its English abbreviation, pH=7.0, viscosity is 5mPa.s) 3g and dissolve in 180ml distilled water, stir at 300rpm for 1 hour to make the concentration about 0.5 % uniform emulsion, placed in the oil tank. 5 bundles of continuous PCS non-melting fibers after non-melting treatment under the same conditions as in Example 1 were continuously oiled and bundled in an oil tank, then dried in a drying furnace, and then degummed in a degumming furnace (processing temperature 700 ° C) and then wound on the upper cylinder To obtain continuous PCS bundled fibers, place the non-melting fibers in a high-temperature furnace, heat them to 1000°C for 1 hour under the protection of high-purity nitrogen at a heating rate of 150°C / hour, take them out after cooling to room temperature, and press 0.5m / h The wire-feeding speed of min enters the 1300 ℃ high-temperature furnace protected by high-purity nitrogen for fi...

Embodiment 3

[0046] Dissolve 3 g of polyether modified silicone oil (PMPS according to its English abbreviation, purity 98%, pH=7.0, viscosity 2000 mPa.s) in 300 ml distilled water, stir evenly, and place it in an oil tank. Five bundles of the same continuous PCS non-melting fibers as in Example 1 were oiled, bundled, dried and fired at a high temperature of 1300°C according to the process flow of Example 1 to obtain continuous SiC fibers.

[0047] The measured fiber breakage rate was 4.1%, the average fiber diameter was 13.2 μm, the average tensile strength was 2.47GPa, and the C.V value of the tensile strength distribution was 23.3%.

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Abstract

The invention discloses finishing oil for the manufacturing of continuous silicone carbide fiber and an application process thereof. The finishing oil for the manufacturing of the continuous silicone carbide fiber is a modified organic silicone oil water solution or emulsion prepared by adding water into modified organic silicone oil, and the modified organic silicone oil is polysiloxane containing different active groups. The finishing oil has a simple preparation method. The finishing oil is applied to the manufacturing of the continuous silicone carbide fiber, has the characteristics of simple process, convenient operation, easy implementation on production lines of SiC fiber and the like, can effectively reduce the mechanical damage to PCS fiber when the PCS fiber passes through guide rolls, reduce broken filaments and broken ends of the fiber, improve the convergence and filament bundling strength of the fiber, and improve the mechanical properties and the uniformity of the prepared SiC fiber.

Description

technical field [0001] The invention relates to an oil agent for continuous silicon carbide fiber manufacture and its application process. Background technique [0002] Silicon carbide fibers have important application values ​​in high-tech fields such as aviation, aerospace, nuclear industry, and weaponry because of their high strength, high modulus, high temperature resistance, oxidation resistance, and corrosion resistance. [0003] Industrially, the industrial production of continuous SiC fibers has been realized by using the organosilicon polymer polycarbosilane (Polycarbosilane, “PCS”) precursor conversion method. Its typical preparation process is as follows: using polycarbosilane obtained by high-temperature cracking, rearrangement and polycondensation of organosilicon polymers as a precursor, continuous PCS fibers are prepared by melt spinning, and the continuous PCS fibers are placed in air for oxidation reaction. Intermolecular cross-linking becomes non-melting f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643D06M15/647D06M15/65D01F9/10
Inventor 宋永才王得印李义和王应德王军
Owner NAT UNIV OF DEFENSE TECH
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