CN111704478A - Sizing method for high-strength high-modulus silicon carbide fiber - Google Patents
Sizing method for high-strength high-modulus silicon carbide fiber Download PDFInfo
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- CN111704478A CN111704478A CN202010535578.2A CN202010535578A CN111704478A CN 111704478 A CN111704478 A CN 111704478A CN 202010535578 A CN202010535578 A CN 202010535578A CN 111704478 A CN111704478 A CN 111704478A
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- 238000004513 sizing Methods 0.000 title claims abstract description 177
- 239000000835 fiber Substances 0.000 title claims abstract description 156
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 65
- 238000004804 winding Methods 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 239000003822 epoxy resin Substances 0.000 claims abstract description 18
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000004902 Softening Agent Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 13
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000004661 hydrophilic softener Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 7
- 235000011187 glycerol Nutrition 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/82—Coating or impregnation with organic materials
- C04B41/84—Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4853—Epoxides
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
- C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/82—Coating or impregnation with organic materials
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Abstract
The invention discloses a sizing method for high-strength high-modulus silicon carbide fibers, which comprises the following steps: deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 26-28: 4-6: 1-3, uniformly mixing and stirring to obtain a sizing agent; pre-drying: starting the oven, and raising the temperature to 100-130 ℃; sizing: winding silicon carbide fibers on a bobbin, feeding the silicon carbide fibers into a slurry tank through a sizing roller, and pouring a sizing agent into the slurry tank to perform sizing treatment on the silicon carbide fibers to obtain sizing fibers; and (3) drying the sized fiber by an oven, and winding the fiber on a yarn winding drum through a tension controller and a guide roller. Solves the problems that the silicon carbide fiber is easy to hair and break in the sizing process and the sizing agent is not adaptive in the prior art.
Description
Technical Field
The invention belongs to the technical field of preparation of fiber reinforced composite preforms, and particularly relates to a sizing method for high-strength high-modulus silicon carbide fibers.
Background
The silicon carbide fiber is an inorganic fiber obtained by spinning, carbonizing or vapor depositing an organic silicon compound as a raw material, and is also a ceramic fiber with excellent performance. Currently, silicon carbide fibers are sized once when monofilaments are prepared into bundles, but smooth winding of the fibers can only be realized to form a package with a certain specification. Because the silicon carbide fiber has high modulus, thick monofilament diameter and poor bundling property, particularly the fiber has extremely low hooking strength and is easy to break, the fiber bundle is fluffed and broken due to friction in the preparation process of the preform, and the preparation requirements of the subsequent fiber preform cannot be met. Therefore, the secondary sizing of the silicon carbide fiber becomes the difficult point and the key for preparing the silicon carbide fiber preform.
At present, secondary sizing of high-strength high-modulus silicon carbide fibers with extremely low hooking strength by adopting the traditional sizing process and sizing agent still has many problems:
(1) the silicon carbide fiber has the characteristics of high strength and high modulus, thick monofilament diameter, poor bundling property, extremely low fiber hooking strength and easy breakage, and hair and breakage are caused by friction between the silicon carbide fiber bundle and the fiber bundle, between the fiber bundle and a guide roller and between the fiber bundle and a press roller in the sizing process; (2) in the traditional sizing process, thousands of yarns are wound on a warp beam after being warped, and then are sized in batches; this requires that the length of yarn of each package be over kilometers and even more than ten thousand meters, and thousands of yarns enter the size box and the oven through the guide roller simultaneously in the sizing process; however, the package length of the current domestic silicon carbide fiber is only 500-530 m, and the traditional sectional warping or batch warping mode cannot be used for warping and then sizing; in addition, the friction between yarns and guide rollers is large in the batch sizing process, and the yarns and the guide rollers are in sliding friction, so that the silicon carbide fiber bundles are easy to hair and brittle fracture, and huge waste is caused; (3) the traditional sizing agent is prepared by compounding a plurality of chemical additives, and the components of the traditional sizing agent are determined by the yarn performance; for silicon carbide fibers, no chemical auxiliary is currently identified.
Disclosure of Invention
The invention aims to provide a sizing method for high-strength high-modulus silicon carbide fibers, which solves the problems that the silicon carbide fibers are easy to hair and break and sizing agents are not adaptive in the sizing process in the prior art.
The technical scheme adopted by the invention is a sizing method for high-strength high-modulus silicon carbide fibers, which is implemented according to the following steps:
step 1, sizing agent blending
Deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 26-28: 4-6: 1-3, uniformly mixing and stirring to obtain a sizing agent for later use;
step 2, pre-drying
Starting the oven, and raising the temperature to 100-130 ℃;
step 3, sizing
Winding silicon carbide fibers on a bobbin, feeding the silicon carbide fibers into a slurry tank through a sizing roller, and pouring a sizing agent into the slurry tank to perform sizing treatment on the silicon carbide fibers to obtain sizing fibers;
and 4, drying the sizing fiber by an oven, and winding the sizing fiber on a yarn winding drum through a tension controller and a guide roller.
The invention is also characterized in that:
in step 1, the epoxy resin slurry is an MU series slurry having a solid content of 50%.
In step 1, the hydrophilic softener is organosilicon or glycerol.
The relevant parameters for silicon carbide fibers are as follows:
the linear density of the fiber is 200 plus or minus 5tex, the tensile strength of the fiber is more than or equal to 2.30Gpa, the elastic modulus is more than or equal to 270Gpa, and the elongation at break is more than or equal to 1.0 percent.
The oven is a hot air blowing type dryer.
The sizing roller and the guide roller are rolling guide rollers.
The invention has the beneficial effects that:
the sizing method for the high-strength high-modulus silicon carbide fiber provided by the invention effectively solves the problems of difficult sizing of the silicon carbide fiber and unmatched sizing agent, only adopts the sizing roller and the guide roller, changes the traditional sliding friction into rolling friction, has soft friction working condition, and greatly reduces the friction between the silicon carbide fiber and between the silicon carbide fiber and the sizing roller; according to the sizing method for the high-strength high-modulus silicon carbide fiber, the unwinding speed of the silicon carbide fiber can be adjusted in the sizing process, the optimal unwinding and winding speeds are determined, the tension uniformity of the silicon carbide fiber during sizing is favorably ensured, frequent brittle fracture caused by uneven tension is avoided, the sizing speed is reduced, and the tension and the sizing efficiency of the silicon carbide fiber during sizing are effectively ensured;
according to the sizing method for the high-strength high-modulus silicon carbide fiber, the silicon carbide fiber bundle is directly unwound from the yarn barrel, so that the problems of silicon carbide fiber hair, yarn splitting and even brittle fracture caused by entanglement, friction and overlapping between the silicon carbide fiber and between the silicon carbide fiber and a sizing roller during batch warping and batch sizing are solved;
the sizing method for the high-strength high-modulus silicon carbide fiber can finish sizing at normal temperature, does not need to boil the sizing before sizing, does not need to preserve the temperature of the sizing liquid during sizing, reduces the complexity of sizing equipment, and also reduces the energy waste in the sizing process; according to the invention, the silicon carbide fiber is not required to be soaked in the sizing agent, and the sizing agent is directly driven by the sizing roller to size the silicon carbide fiber, so that the size hanging amount of the silicon carbide fiber is reduced, and the waste of the sizing agent is reduced.
Drawings
FIG. 1 is a flow chart of a sizing method for high strength and high modulus silicon carbide fibers according to the present invention.
In the figure, 1 is a yarn winding drum, 2 is a guide roller, 3 is sizing fiber, 4 is a tension controller, 5 is an oven, 6 is a sizing roller, 7 is a size groove, 8 is silicon carbide fiber, and 9 is a yarn drum.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The sizing method for the high-strength high-modulus silicon carbide fiber disclosed by the invention is implemented according to the following steps as shown in figure 1:
step 1, sizing agent blending
Deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 26-28: 4-6: 1-3, uniformly mixing and stirring to obtain a sizing agent for later use;
the epoxy resin sizing agent is MU series sizing agent with solid content of 50%; the hydrophilic softening agent is organic silicon or glycerin;
the epoxy resin sizing agent has good film forming property and adhesiveness; can be completely volatilized in a high-temperature environment, and the performance of the sizing fiber 3 is kept; the silicon carbide fibers 8 can be bonded together, the bundling property of the silicon carbide fibers 8 is improved, meanwhile, a layer of protective film can be formed on the surfaces of the silicon carbide fibers 8 to completely adhere to the broken filaments on the surfaces of the fibers, more broken filaments generated by contact friction of the silicon carbide fibers 8 in the subsequent weaving process are avoided, and the weaving performance of the silicon carbide fibers 8 is improved;
step 2, pre-drying
Starting the oven 5, raising the temperature to 100-130 ℃, and keeping the temperature constant; wherein, the drying oven 5 is a hot blowing type drying machine;
step 3, sizing
Winding silicon carbide fibers 8 on a bobbin 9, feeding the silicon carbide fibers into a slurry tank 7 through a sizing roller 6, pouring a sizing agent into the slurry tank 7 to perform sizing treatment on a single silicon carbide fiber 8, reducing damage caused by friction among the silicon carbide fibers 8, and obtaining sizing fibers 3;
when the silicon carbide fiber 8 is wound on the sizing roller 6, the force needs to be slowly and uniformly applied, so that the tensile property of the silicon carbide fiber 8 is prevented from being damaged due to uneven stress, and even the fiber is prevented from being broken; adding the prepared sizing agent into the size box 7, wherein the volume of the size box 7 needs to be 2/3, and when the sizing agent in the size box 7 is less than 1/3, the sizing agent needs to be continuously added to 2/3 of the volume of the size box 7;
the relevant parameters of the silicon carbide fiber 8 are as follows:
the linear density of the fiber is 200 plus or minus 5tex, the tensile strength of the fiber is more than or equal to 2.30Gpa, the elastic modulus is more than or equal to 270Gpa, and the elongation at break is more than or equal to 1.0 percent;
the relevant parameters of the sizing fibres 3 are as follows:
the linear density of the fiber is 200.4tex, the tensile strength of the fiber is 2.91Gpa, the elastic modulus is 303Gpa, and the elongation at break is 1.22%;
step 4, drying the sizing fiber 3 by an oven 5, and winding the sizing fiber on a yarn winding drum 1 through a tension controller 4 and a guide roller 2;
wherein, the sizing roller 6 and the guide roller 2 are rolling guide rollers, and the sizing roller 6 and the guide roller 2 need to be wiped smoothly before use, so that the sizing roller 6 and the guide roller 2 are prevented from damaging the silicon carbide fiber 8 due to broken filaments, residual pulp and the like.
Example 1
A sizing method for high-strength high-modulus silicon carbide fiber is characterized in that the temperature of a workshop is 25 ℃, the humidity of the workshop is 60-70%, and the speed of the workshop is 30 m/min; the temperature of the vat 7 was set at 25 ℃.
(1) Sizing agent blending
Deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 28: 6: 3, uniformly mixing and stirring to obtain a sizing agent, wherein the solid content of the sizing agent is 8% for later use;
the epoxy resin sizing agent is MU series sizing agent with solid content of 50%; the hydrophilic softening agent is organic silicon or glycerin;
(2) prebaking
Starting a hot air blowing type dryer, raising the temperature to 120 ℃, and keeping the temperature constant;
(3) sizing
Winding silicon carbide fibers 8 on a bobbin 9, feeding the silicon carbide fibers into a slurry tank 7 through a sizing roller 6, pouring a sizing agent into the slurry tank 7 to perform sizing treatment on a single silicon carbide fiber 8 to obtain sizing fibers 3; after being dried by a hot air type dryer, the sizing fiber 3 is wound on a yarn winding drum 1 through a tension controller 4 and a guide roller 2;
the relevant parameters of the silicon carbide fiber 8 are as follows:
the linear density of the fiber is 195.7tex, the tensile strength of the fiber is 2.89Gpa, the elastic modulus is 299Gpa, and the elongation at break is 1.12 percent;
the relevant parameters of the sizing fibres 3 are as follows:
the linear density of the fiber is 200.4tex, the tensile strength of the fiber is 2.91Gpa, the elastic modulus is 303Gpa, and the elongation at break is 1.22%.
Example 2
A sizing method for high-strength high-modulus silicon carbide fiber is characterized in that the temperature of a workshop is 25 ℃, the humidity of the workshop is 60-70%, and the speed of the workshop is 30 m/min; the temperature of the vat 7 was set at 25 ℃.
(1) Sizing agent blending
Deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 28: 6: 3, uniformly mixing and stirring to obtain a sizing agent, wherein the solid content of the sizing agent is 8% for later use;
the epoxy resin sizing agent is MU series sizing agent with solid content of 50%; the hydrophilic softening agent is organic silicon or glycerin;
(2) prebaking
Starting a hot air blowing type dryer, raising the temperature to 120 ℃, and keeping the temperature constant;
(3) sizing
Winding silicon carbide fibers 8 on a bobbin 9, feeding the silicon carbide fibers into a slurry tank 7 through a sizing roller 6, pouring a sizing agent into the slurry tank 7 to perform sizing treatment on a single silicon carbide fiber 8 to obtain sizing fibers 3; after being dried by a hot air type dryer, the sizing fiber 3 is wound on a yarn winding drum 1 through a tension controller 4 and a guide roller 2;
the relevant parameters of the silicon carbide fiber 8 are as follows:
the linear density of the fiber is 195.7tex, the tensile strength of the fiber is 2.89Gpa, the elastic modulus is 299Gpa, and the elongation at break is 1.12 percent;
the relevant parameters of the sizing fibres 3 are as follows:
the linear density of the fiber is 200.4tex, the tensile strength of the fiber is 2.91Gpa, the elastic modulus is 303Gpa, and the elongation at break is 1.22%.
Example 3
A sizing method for high-strength high-modulus silicon carbide fiber is characterized in that the temperature of a workshop is 25 ℃, the humidity of the workshop is 60-70%, and the speed of the workshop is 30 m/min; the temperature of the vat 7 was set at 25 ℃.
(1) Sizing agent blending
Deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 28: 6: 3, uniformly mixing and stirring to obtain a sizing agent, wherein the solid content of the sizing agent is 8% for later use;
the epoxy resin sizing agent is MU series sizing agent with solid content of 50%; the hydrophilic softening agent is organic silicon or glycerin;
(2) prebaking
Starting a hot air blowing type dryer, raising the temperature to 120 ℃, and keeping the temperature constant;
(3) sizing
Winding silicon carbide fibers 8 on a bobbin 9, feeding the silicon carbide fibers into a slurry tank 7 through a sizing roller 6, pouring a sizing agent into the slurry tank 7 to perform sizing treatment on a single silicon carbide fiber 8 to obtain sizing fibers 3; after being dried by a hot air type dryer, the sizing fiber 3 is wound on a yarn winding drum 1 through a tension controller 4 and a guide roller 2;
the relevant parameters of the silicon carbide fiber 8 are as follows:
the linear density of the fiber is 195.7tex, the tensile strength of the fiber is 2.89Gpa, the elastic modulus is 299Gpa, and the elongation at break is 1.12 percent;
the relevant parameters of the sizing fibres 3 are as follows:
the linear density of the fiber is 200.4tex, the tensile strength of the fiber is 2.91Gpa, the elastic modulus is 303Gpa, and the elongation at break is 1.22%.
Example 4
A sizing method for high-strength high-modulus silicon carbide fiber is characterized in that the temperature of a workshop is 25 ℃, the humidity of the workshop is 60-70%, and the speed of the workshop is 30 m/min; the temperature of the vat 7 was set at 25 ℃.
(1) Sizing agent blending
Deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 26: 4: 1, uniformly mixing and stirring to obtain a sizing agent, wherein the solid content of the sizing agent is 8% for later use;
the epoxy resin sizing agent is MU series sizing agent with solid content of 50%; the hydrophilic softening agent is organic silicon or glycerin;
(2) prebaking
Starting a hot air blowing type dryer, raising the temperature to 100 ℃, and keeping the temperature constant;
(3) sizing
Winding silicon carbide fibers 8 on a bobbin 9, feeding the silicon carbide fibers into a slurry tank 7 through a sizing roller 6, pouring a sizing agent into the slurry tank 7 to perform sizing treatment on a single silicon carbide fiber 8 to obtain sizing fibers 3; after being dried by a hot air type dryer, the sizing fiber 3 is wound on a yarn winding drum 1 through a tension controller 4 and a guide roller 2;
the relevant parameters of the silicon carbide fiber 8 are as follows:
the linear density of the fiber is 195.7tex, the tensile strength of the fiber is 2.89Gpa, the elastic modulus is 299Gpa, and the elongation at break is 1.12 percent;
the relevant parameters of the sizing fibres 3 are as follows:
the linear density of the fiber is 200.4tex, the tensile strength of the fiber is 2.91Gpa, the elastic modulus is 303Gpa, and the elongation at break is 1.22%.
Example 5
A sizing method for high-strength high-modulus silicon carbide fiber is characterized in that the temperature of a workshop is 25 ℃, the humidity of the workshop is 60-70%, and the speed of the workshop is 30 m/min; the temperature of the vat 7 was set at 25 ℃.
(1) Sizing agent blending
Deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 27: 5: 2, uniformly mixing and stirring to obtain a sizing agent, wherein the solid content of the sizing agent is 8% for later use;
the epoxy resin sizing agent is MU series sizing agent with solid content of 50%; the hydrophilic softening agent is organic silicon or glycerin;
(2) prebaking
Starting a hot air blowing type dryer, raising the temperature to 130 ℃, and keeping the temperature constant;
(3) sizing
Winding silicon carbide fibers 8 on a bobbin 9, feeding the silicon carbide fibers into a slurry tank 7 through a sizing roller 6, pouring a sizing agent into the slurry tank 7 to perform sizing treatment on a single silicon carbide fiber 8 to obtain sizing fibers 3; after being dried by a hot air type dryer, the sizing fiber 3 is wound on a yarn winding drum 1 through a tension controller 4 and a guide roller 2;
the relevant parameters of the silicon carbide fiber 8 are as follows:
the linear density of the fiber is 205tex, the tensile strength of the fiber is 2.89Gpa, the elastic modulus is 300Gpa, and the elongation at break is 1.13%;
the relevant parameters of the sizing fibres 3 are as follows:
the linear density of the fiber is 200.4tex, the tensile strength of the fiber is 2.91Gpa, the elastic modulus is 303Gpa, and the elongation at break is 1.22%.
Claims (6)
1. A sizing method for high-strength high-modulus silicon carbide fibers is characterized by comprising the following steps:
step 1, sizing agent blending
Deionized water, epoxy resin sizing agent and hydrophilic softening agent are mixed according to the mass ratio of 26-28: 4-6: 1-3, uniformly mixing and stirring to obtain a sizing agent for later use;
step 2, pre-drying
Starting the oven (5), and raising the temperature to 100-130 ℃;
step 3, sizing
Winding silicon carbide fibers (8) on a bobbin (9), feeding the silicon carbide fibers into a slurry tank (7) through a sizing roller (6), pouring the sizing agent into the slurry tank (7) to perform sizing treatment on the silicon carbide fibers (8) to obtain sizing fibers (3);
and 4, drying the sizing fiber (3) by an oven (5), and winding the sizing fiber on a yarn winding drum (1) through a tension controller (4) and a guide roller (2).
2. The method of claim 1, wherein in step 1, the epoxy resin based slurry is a MU series slurry with a solid content of 50%.
3. The method for sizing a high-strength high-modulus silicon carbide fiber according to claim 1, wherein in step 1, the hydrophilic softener is silicone or glycerol.
4. A sizing method for high-strength high-modulus silicon carbide fiber according to claim 1, wherein the silicon carbide fiber (8) has the following relevant parameters:
the linear density of the fiber is 200 plus or minus 5tex, the tensile strength of the fiber is more than or equal to 2.30Gpa, the elastic modulus is more than or equal to 270Gpa, and the elongation at break is more than or equal to 1.0 percent.
5. A sizing method for high-strength high-modulus silicon carbide fiber according to claim 1, wherein the oven (5) is a hot-air dryer.
6. The sizing method for the high-strength high-modulus silicon carbide fiber according to claim 1, wherein the sizing roller (6) and the guide roller (2) are rolling guide rollers.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| GB1002570A (en) * | 1961-06-20 | 1965-08-25 | Hoechst Ag | Improvements in or relating to a process and apparatus for sizing filaments |
| WO1997043479A1 (en) * | 1996-05-16 | 1997-11-20 | T.M.T. Di Manenti & C. S.A.S. | Apparatus for sizing warp yarns |
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