CN113375996A - Sample preparation device and sample preparation method for tensile property of asphalt-based carbon fiber multifilament - Google Patents
Sample preparation device and sample preparation method for tensile property of asphalt-based carbon fiber multifilament Download PDFInfo
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- CN113375996A CN113375996A CN202110741600.3A CN202110741600A CN113375996A CN 113375996 A CN113375996 A CN 113375996A CN 202110741600 A CN202110741600 A CN 202110741600A CN 113375996 A CN113375996 A CN 113375996A
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- fiber multifilament
- carbon fiber
- based carbon
- sample preparation
- tensile property
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 51
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 51
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 39
- 239000010426 asphalt Substances 0.000 title claims description 29
- 238000005464 sample preparation method Methods 0.000 title abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 37
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 22
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 22
- 238000007598 dipping method Methods 0.000 claims abstract description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 19
- 239000003292 glue Substances 0.000 claims description 16
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 13
- 239000002390 adhesive tape Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims 3
- 238000013007 heat curing Methods 0.000 abstract 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
本发明涉及一种沥青基碳纤维复丝拉伸性能制样装置及制样方法，包括至少两根直径＞50mm四氟外管（1）和纤维复丝（6），两根所述四氟外管（1）平行设置，两根所述四氟外管（1）之间通过T型支架（3）进行连接，所述纤维复丝（6）的一端通过一耐热胶带（7）固定在一根四氟外管（1）上，所述纤维复丝（6）的另一端通过另一耐热胶带（7）固定在另一根四氟外管（1）上，固定后的所述纤维复丝（6）依次进行浸胶和加热固化处理。
The invention relates to a sample preparation device and a sample preparation method for the tensile properties of pitch-based carbon fiber multifilaments, comprising at least two PTFE outer tubes (1) with a diameter of >50 mm and fiber multifilaments (6), two of the tetrafluoro outer tubes (6). The tubes (1) are arranged in parallel, the two tetrafluoro outer tubes (1) are connected by a T-shaped bracket (3), and one end of the fiber multifilament (6) is fixed on a heat-resistant tape (7). On a PTFE outer tube (1), the other end of the fiber multifilament (6) is fixed on another PTFE outer tube (1) through another heat-resistant tape (7), and the fixed The fiber multifilaments (6) are sequentially subjected to dipping and heat curing treatment.
Description
Technical Field
The invention relates to a sample preparation device and a sample preparation method for tensile property of an asphalt-based carbon fiber multifilament.
Background
The asphalt-based carbon fiber is developed rapidly in recent years, but the asphalt-based carbon fiber has poor toughness due to ultrahigh modulus and very low elongation at break, generally less than 0.3%, so that the asphalt-based carbon fiber multifilament is easy to break in the sample preparation process according to the national standard GB/T3362-2017, and the sample preparation success rate is low.
In addition, the current carbon fiber multifilament tensile testing standard GB/T3362-2017 is a testing standard which extends for 1982 and 2005, and therefore the sample preparation details therein are focused on polyacrylonitrile carbon fibers, which are used in pitch-based carbon fiber multifilaments with some drawbacks.
Disclosure of Invention
The invention designs a sample preparation device and a sample preparation method for tensile property of an asphalt-based carbon fiber multifilament, which solve the technical problem that the toughness of the asphalt-based carbon fiber is poor, so that the asphalt-based carbon fiber multifilament is easy to break in the sample preparation process according to the national standard GB/T3362-2017, and the sample preparation success rate is low.
In order to solve the technical problems, the invention adopts the following scheme:
the utility model provides a pitch base carbon fiber multifilament tensile properties system appearance device which characterized in that: the polytetrafluoroethylene composite fiber composite tube is characterized by comprising at least two polytetrafluoroethylene outer tubes (1) with diameters larger than 50mm and fiber multifilaments (6), wherein the two polytetrafluoroethylene outer tubes (1) are arranged in parallel, the two polytetrafluoroethylene outer tubes (1) are connected through a T-shaped support (3), one end of each fiber multifilament (6) is fixed on one polytetrafluoroethylene outer tube (1) through one heat-resistant adhesive tape (7), the other end of each fiber multifilament (6) is fixed on the other polytetrafluoroethylene outer tube (1) through the other heat-resistant adhesive tape (7), and the fixed fiber multifilaments (6) are sequentially subjected to gum dipping and heating curing.
Preferably, the highest circumferential points of the two tetrafluoro outer pipes (1) are at the same horizontal height, and the area of the fiber multifilament (6) between the two highest circumferential points is a gummed area.
Preferably, the polytetrafluoroethylene outer tube (1) is internally supported by a stainless steel inner tube (2).
Preferably, the number of the stainless steel inner pipes (2) is two, each stainless steel inner pipe (2) is coated by one or more polytetrafluoroethylene outer pipes (1), and the two horizontal ends of the T-shaped support (3) are fixedly connected with the two stainless steel inner pipes (2) respectively.
Preferably, a hook (4) is further arranged at one horizontal end of the T-shaped support (3), and the hook (4) is used for hanging the asphalt-based carbon fiber multifilament tensile property sample preparation device in a drying device.
Preferably, the vertical end of the T-shaped support (3) is used for conveniently holding and placing the asphalt-based carbon fiber multifilament tensile property sample preparation device in a sizing tank (8) to dip the fiber multifilaments (6).
Preferably, the multifunctional tee joint further comprises a bench clamp (5), wherein the bench clamp (5) is fixed with the vertical end of the T-shaped support (3), and the fiber multifilament (6) is conveniently adhered to the tetrafluoro outer tube (1).
Preferably, the vertical end of the T-shaped bracket (3) is a square tube.
Preferably, the fiber multifilament (6) is pitch-based carbon fiber.
A method for preparing a sample of the tensile property of an asphalt-based carbon fiber multifilament comprises the following steps:
and 3, vertically suspending the asphalt-based carbon fiber multifilament tensile property sample preparation device in a drying device for heating and curing, and completing sample preparation.
The sample preparation device and the sample preparation method for the tensile property of the asphalt-based carbon fiber multifilament have the following beneficial effects:
(1) the invention fixes the asphalt fiber on the tetrafluoro round tube, can be impregnated by less epoxy glue solution, then is vertically hung in an oven for heating and curing, the sample strip is heated and cured in a vertical state, and the redundant glue is easy to drip, so that the sample prepared by the invention can obtain a smooth stick-shaped sample strip without glue beads for tensile test.
(2) The invention only fixes one side of the fiber multifilament to dip in glue, and can finish the glue dipping in a glue dipping tank by using little glue solution, the waste glue solution is less each time, and the glue solution prepared in the standard uses acetone, thereby reducing the preparation and waste of the glue solution and being very beneficial to environmental protection.
(3) The invention fixes the asphalt fiber on the tetrafluoro round pipe with the diameter larger than 50mm, so the curvature radius of the sticking and fixing fiber is larger, and the possibility of yarn breakage during operation is very low.
Drawings
FIG. 1: the invention relates to a front view of a sample preparation device for tensile property of asphalt-based carbon fiber multifilament;
FIG. 2: the left view of the sample preparation device for the tensile property of the asphalt-based carbon fiber multifilament;
FIG. 3: the invention discloses a top view of a pitch-based carbon fiber multifilament tensile property sample preparation device;
FIG. 4: the pitch-based carbon fiber multifilament tensile property sample preparation device is fixed schematically;
FIG. 5: the schematic diagram of pasting the fiber multifilament by the asphalt-based carbon fiber multifilament tensile property sample preparation device is shown; (ii) a
FIG. 6: FIG. 5 is a top view;
FIG. 7: schematic representation of the fiber multifilament of the present invention with dip;
FIG. 8: the multifilament fiber of the present invention is schematically shown in a cured state.
Description of reference numerals:
1-a tetrafluoro outer tube; 2-stainless steel inner pipe; 3-T-shaped stents; 4, hooking; 5, bench clamp; 6-multifilament fiber; 7-heat-resistant adhesive tape; 8-gluing groove.
Detailed Description
The invention is further described below with reference to fig. 1 to 8:
as shown in fig. 1-3, the pitch-based carbon fiber tensile property sample preparation device of the present invention is to use 2 stainless steel circular tubes with both ends welded and sealed, and outer diameter 50mm, to be symmetrically fixed at both ends of a 1-length 250mm, 20x20 mm square tube, and a 1-20 x20 mm short square tube (also used as a handle) is vertically welded and fixed downwards at the center of the square tube, wherein 1 hook is welded on the outermost arc surface in the middle of the 1 circular tube, 4 tetrafluoride tubes with inner diameter 50mm are respectively sleeved at both ends of the 2 stainless steel circular tubes, the inner ends are close to the square tube, the outer ends are flush with the stainless steel sealing end, and the square tube and the stainless steel circular tube form a T-shaped bracket 3, as shown in fig. 1-3.
Besides, two tetrafluoro outer tubes 1 are arranged in parallel, and the two tetrafluoro outer tubes 1 are connected through a T-shaped bracket 3.
The sample preparation method of the sample preparation device for the tensile property of the asphalt-based carbon fiber multifilament comprises the following steps:
1. the short square tube was held by a vise 5, and the pitch-based carbon fiber tensile property sample preparation device was fixed and laid flat on the vise 5, as shown in fig. 4.
2. One end of a section of the pitch-based carbon fiber is fixedly adhered to the tetrafluoro outer tube 1 by using a heat-resistant adhesive tape 7 with a proper length, the other end of the pitch-based carbon fiber is fixedly adhered to the other corresponding tetrafluoro tube 1 by using the heat-resistant adhesive tape 7 in a proper tensioned state, and a plurality of fibers are fixed in parallel in the same way, as shown in fig. 5 and 6.
3. The sample preparation device for the tensile property of the pitch-based carbon fiber multifilament is taken down from the bench clamp 5, the short square tube is held by hand, one surface adhered with the pitch-based carbon fiber is punched down and immersed into a gluing tank 8 with a slightly larger size than the flat-placed size of the device, as shown in fig. 7, the surface is taken out after being fully impregnated with glue solution, redundant glue solution is removed, the surface is vertically hung on a grid in an oven for heating and curing, and a sample strip with the length of at least 250mm is cut off for testing after curing. The excess material adhered on the tetrafluoro outer tube 1 can be removed as soon as being knocked off, and the device is cleaned for later use.
The polytetrafluoroethylene circular tube for pasting and fixing the asphalt-based carbon fiber multifilament is large in diameter and pasted by the adhesive tape, broken filaments can be obviously reduced and controlled, the impregnated sample strip is vertically suspended in the oven, and redundant glue is heated to reduce viscosity and drop when the temperature is raised, so that a straight stick-shaped sample strip without glue beads can be obtained after heating and curing. During gum dipping, only one surface fixed with the fiber multifilament is gum dipped, the gum dipping can be finished in a gum dipping tank by using less gum solution, less gum solution is wasted each time, and the gum solution prepared in the standard can use solvent acetone, so that the preparation and waste of the gum solution are greatly reduced, and the environment is protected.
The invention is described above with reference to the accompanying drawings, it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (10)
1. The utility model provides a pitch base carbon fiber multifilament tensile properties system appearance device which characterized in that: the polytetrafluoroethylene composite fiber composite tube is characterized by comprising at least two polytetrafluoroethylene outer tubes (1) with diameters larger than 50mm and fiber multifilaments (6), wherein the two polytetrafluoroethylene outer tubes (1) are arranged in parallel, the two polytetrafluoroethylene outer tubes (1) are connected through a T-shaped support (3), one end of each fiber multifilament (6) is fixed on one polytetrafluoroethylene outer tube (1) through one heat-resistant adhesive tape (7), the other end of each fiber multifilament (6) is fixed on the other polytetrafluoroethylene outer tube (1) through the other heat-resistant adhesive tape (7), and the fixed fiber multifilaments (6) are sequentially subjected to gum dipping and heating curing.
2. The pitch-based carbon fiber multifilament tensile property sample preparation device according to claim 1, wherein: the highest circumferential points of the two tetrafluoro outer pipes (1) are at the same horizontal height, and the area, between the two highest circumferential points, of the fiber multifilament (6) is a gumming area.
3. The pitch-based carbon fiber multifilament tensile property sample preparation device according to claim 1, wherein: the polytetrafluoroethylene outer tube (1) is internally supported by a stainless steel inner tube (2).
4. The pitch-based carbon fiber multifilament tensile property sample preparation device according to claim 3, wherein: the stainless steel inner tubes (2) are two, each stainless steel inner tube (2) is coated by one or more polytetrafluoroethylene outer tubes (1), and the two horizontal ends of the T-shaped support (3) are fixedly connected with the two stainless steel inner tubes (2) respectively.
5. The pitch-based carbon fiber multifilament tensile property sampling device according to any one of claims 1 to 4, wherein: the horizontal end of the T-shaped support (3) is further provided with a hook (4), and the hook (4) is used for hanging the asphalt-based carbon fiber multifilament tensile property sample preparation device in a drying device.
6. The pitch-based carbon fiber multifilament tensile property sample preparation device according to claim 5, wherein: and the vertical end of the T-shaped support (3) is used for conveniently holding and placing the asphalt-based carbon fiber multifilament tensile property sample preparation device in a gluing groove (8) to glue the fiber multifilament (6).
7. The pitch-based carbon fiber multifilament tensile property sampling device according to any one of claims 1 to 6, wherein: the novel polytetrafluoroethylene fiber composite pipe is characterized by further comprising bench clamps (5), wherein the bench clamps (5) are fixed with the vertical ends of the T-shaped supports (3), and the fiber multifilament (6) is conveniently adhered to the polytetrafluoroethylene outer pipe (1).
8. The pitch-based carbon fiber multifilament tensile property sample preparation device according to claim 7, wherein: the vertical end of the T-shaped support (3) is a square tube.
9. The pitch-based carbon fiber multifilament tensile property sampling device according to any one of claims 1 to 8, wherein: the fiber multifilament (6) is pitch-based carbon fiber.
10. A method for preparing a sample of the tensile property of an asphalt-based carbon fiber multifilament comprises the following steps:
step 1, fixing two ends of a fiber multifilament (6) on a root tetrafluoro outer tube (1) of an asphalt-based carbon fiber multifilament tensile property sample preparation device respectively;
step 2, placing the sample preparation device for the tensile property of the asphalt-based carbon fiber multifilament into a sizing tank (8), and fully dipping the fiber multifilament (6) with glue solution;
and 3, vertically suspending the asphalt-based carbon fiber multifilament tensile property sample preparation device in a drying device for heating and curing, and completing sample preparation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110741600.3A CN113375996B (en) | 2021-07-01 | 2021-07-01 | A kind of pitch-based carbon fiber multifilament tensile property sample preparation device and sample preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110741600.3A CN113375996B (en) | 2021-07-01 | 2021-07-01 | A kind of pitch-based carbon fiber multifilament tensile property sample preparation device and sample preparation method |
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| Publication Number | Publication Date |
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| CN113375996A true CN113375996A (en) | 2021-09-10 |
| CN113375996B CN113375996B (en) | 2022-07-08 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759479A (en) * | 2012-07-20 | 2012-10-31 | 北京化工大学 | Gluing fixed support for tensile property tests on fiber multifilaments and fiber multifilament sample preparing method |
| CN102809499A (en) * | 2012-08-15 | 2012-12-05 | 中国科学院宁波材料技术与工程研究所 | Sample preparation method for carbon fiber tensile property test |
| CN108303296A (en) * | 2018-01-18 | 2018-07-20 | 航天材料及工艺研究所 | A kind of method for making sample for the test of high model carbon fiber tensile property of multi-filament |
| CN108318302A (en) * | 2018-01-18 | 2018-07-24 | 航天材料及工艺研究所 | A kind of method for making sample for the test of asphalt base carbon fiber tensile property of multi-filament |
| CN109406234A (en) * | 2018-11-06 | 2019-03-01 | 北京化工大学 | Large-tow carbon fiber multifilament tensile sample and its preparation facilities and method |
| CN110763534A (en) * | 2019-10-17 | 2020-02-07 | 航天材料及工艺研究所 | Sample preparation device for tensile property of ultrahigh-modulus carbon fiber multifilament and preparation method of sample |
| WO2020173508A1 (en) * | 2019-02-27 | 2020-09-03 | 北京市理化分析测试中心 | Carbon fibre bundle sample preparation apparatus, and preparation method for carbon fibre bundle |
-
2021
- 2021-07-01 CN CN202110741600.3A patent/CN113375996B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759479A (en) * | 2012-07-20 | 2012-10-31 | 北京化工大学 | Gluing fixed support for tensile property tests on fiber multifilaments and fiber multifilament sample preparing method |
| CN102809499A (en) * | 2012-08-15 | 2012-12-05 | 中国科学院宁波材料技术与工程研究所 | Sample preparation method for carbon fiber tensile property test |
| CN108303296A (en) * | 2018-01-18 | 2018-07-20 | 航天材料及工艺研究所 | A kind of method for making sample for the test of high model carbon fiber tensile property of multi-filament |
| CN108318302A (en) * | 2018-01-18 | 2018-07-24 | 航天材料及工艺研究所 | A kind of method for making sample for the test of asphalt base carbon fiber tensile property of multi-filament |
| CN109406234A (en) * | 2018-11-06 | 2019-03-01 | 北京化工大学 | Large-tow carbon fiber multifilament tensile sample and its preparation facilities and method |
| WO2020173508A1 (en) * | 2019-02-27 | 2020-09-03 | 北京市理化分析测试中心 | Carbon fibre bundle sample preparation apparatus, and preparation method for carbon fibre bundle |
| CN110763534A (en) * | 2019-10-17 | 2020-02-07 | 航天材料及工艺研究所 | Sample preparation device for tensile property of ultrahigh-modulus carbon fiber multifilament and preparation method of sample |
Non-Patent Citations (2)
| Title |
|---|
| 杨延风 等: "碳纤维复丝和单丝拉伸性能测试方法", 《理化检验-物理分册》 * |
| 王岭 等: "《中华人民共和国国家标准GB/T3362-2017》", 14 October 2017 * |
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