CN105954342A - Method for testing density of polyacrylonitrile protofilament fibers - Google Patents
Method for testing density of polyacrylonitrile protofilament fibers Download PDFInfo
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- CN105954342A CN105954342A CN201610266264.0A CN201610266264A CN105954342A CN 105954342 A CN105954342 A CN 105954342A CN 201610266264 A CN201610266264 A CN 201610266264A CN 105954342 A CN105954342 A CN 105954342A
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- 239000000835 fiber Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 27
- 229920002239 polyacrylonitrile Polymers 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000004448 titration Methods 0.000 claims abstract description 58
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000011630 iodine Substances 0.000 claims abstract description 41
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 41
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005406 washing Methods 0.000 claims abstract description 12
- 239000012086 standard solution Substances 0.000 claims abstract description 7
- 238000009795 derivation Methods 0.000 claims abstract description 6
- 230000033764 rhythmic process Effects 0.000 claims abstract description 6
- 238000000954 titration curve Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 26
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000003760 magnetic stirring Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000013019 agitation Methods 0.000 claims description 4
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 239000000243 solution Substances 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 abstract description 3
- 238000002791 soaking Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- 238000003918 potentiometric titration Methods 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 239000002243 precursor Substances 0.000 description 6
- 229920000049 Carbon (fiber) Polymers 0.000 description 5
- 239000004917 carbon fiber Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 2
- 229940006461 iodide ion Drugs 0.000 description 2
- 229910001961 silver nitrate Inorganic materials 0.000 description 2
- 239000012498 ultrapure water Substances 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 1
- -1 alkene nitrile Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/42—Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte
-
- 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
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a method for testing the density of polyacrylonitrile protofilament fibers. The method includes the steps: (1) preparing an iodine solution; (2) weighing fiber bundles with the mass range of 0.09-0.41 g; (3) putting the weighed fiber sample into a cylinder with a baffle plate, immersing the cylinder in the iodine solution, and soaking; (4) washing, and carrying out centrifugal spin-drying; (5) adding 80-100 ml of DMSO, and stirring the sample until the sample is completely dissolved; (6) carrying out potentiometric titration with a 0.1 mol/L AgNO3 standard solution on an automatic titration device, wherein titration adopts a linear titration manner, the titration speed is in a customized mode, the titration rhythm is 0.01 ml/s and the sample titration jump line is a curve; and carrying out derivation on the titration curve, and taking the titration volume corresponding to the maximum derivative value as the titration terminal point volume; and (7) calculating the percentage content of iodine absorption. The test process is accurate and controllable, the requirement is specified, and the obtained parallel results are accurate and reliable and strong in comparability.
Description
Technical field
The present invention relates to carbon fiber field, say further, relate to a kind of polyacrylonitrile fibril fiber fine and close
The method of testing of degree.
Background technology
Carbon fiber is a kind of novel metalloid material, have high specific strength, high ratio modulus, high temperature resistant, corrosion-resistant,
A series of excellent properties such as low-thermal-expansion, high connductivity and heat conduction, self-lubricating etc., be widely used in space flight and aviation,
The civilian industry fields such as the leading-edge fields such as national defense and military and senior sports goods, medical apparatus and instruments.Carbon fiber master
Will be obtained through high temperature cabonization by polyacrylonitrile fibril, the quality of carbon fiber is decided by poly-third to a great extent
The quality of alkene nitrile precursor.The compactness extent of polyacrylonitrile fibril be evaluate precursor quality height one important in
Holding, the compactness extent of precursor is the highest, and the intensity of made carbon fiber is the highest.
Polyacrylonitrile fibril compact structure degree does not has clear and definite method of testing, at present to precursor compactness extent
Express and mainly use some indirectly manifestation modes, such as by micropore mean radius contained by coagulated yarn and draw
After stretching, the porosity of wet tow characterizes.Industrial, in order to easy and simple to handle, the compactness extent of polyacrylonitrile fibre
Represent with the iodine absorption number of precursor.Precursor close structure, iodine absorption number is low；Short texture, iodine absorption number is high.
But, the standard rule that this method of testing is the most unified, the error that test process produces is the biggest, Zhi Nengzuo
Result for parallel reference.
Summary of the invention
For solving produced problem in prior art, the invention provides a kind of polyacrylonitrile fibril fiber fine and close
The method of testing of degree.Test process is the most controlled, it is desirable to specification, obtained parallel result accurately and reliably,
Comparability is strong.
It is an object of the invention to provide the method for testing of a kind of polyacrylonitrile fibril fiber consistency.
Described method includes:
(1) preparation of iodine liquid:
The preparation of iodine liquid: iodine, potassium iodide, acetic acid and 2,4-o-chlorphenol is made into iodine liquid, iodine liquid heated and stirred,
Fully reaction；
Wherein, iodine and potassium iodide, acetic acid and 2, the mol ratio of 4-o-chlorphenol is followed successively by: 1:(1～5): (5～8):
(0.1～0.5)；
(2) fibre bundle sample is weighed: the mass range weighed is 0.09～0.41 gram；
(3) fiber sample weighed is put in the cylinder with dividing plate, cylinder is immersed in iodine liquid and soak；
(4) soaked fiber desalted water spray washing sample to water be colourless after, be centrifuged dry；
(5) fiber sample after centrifugal is put in titration cup, add the dimethyl sulfoxide of 80-100 milliliter
(DMSO), stirred sample is until being completely dissolved；
(6) carrying out constant-current titration on autotitrator with 0.1mol/L AgNO3 standard solution, titration is adopted
With linear titration, rate of titration is custom model, and titration rhythm is 0.01ml/s, and sample titration jump is linearly
Curve, carries out derivation to titration curve, using the titration volumes corresponding to maximum derivative value as titration end-point body
Long-pending；
(7) calculate iodine and absorb percentage composition.
Described cylinder includes arranging on lid and cylinder, lid and cylinder porose, and cylinder interior is provided with longitudinal direction
Dividing plate with holes, dividing plate, centered by the axis of cylinder, is distributed radially, by the space average in cylinder
It is divided into N number of part, 2≤N≤10.
The diameter of cylinder and height can be designed, as long as can immerse smoothly according to the beaker size soaked
In the beaker soaked；
Preferably:
Iodine liquid concentration range is 0.1～0.5mol/L.
In step (1), the heating-up temperature of iodine liquid is 40-60 degree Celsius；The described reacting by heating time is 15-60
Minute.
In step (3), soak time is 30-60 minute.
Step (4) it is 30-60 minute with the desalted water spray washing time；Described centrifugation time is 30-60
Minute.
In step (5), the temperature of dimethyl sulfoxide is not higher than 60 DEG C, adds heat energy and accelerates to dissolve, but temperature is not
Can prevent iodine from volatilizing higher than 60 degree.
Bore dia on cylinder is 0.1～0.5cm, every square centimeter of 1～100 hole.
Described cylinder is arranged on A-frame, and support is placed on magnetic stirring apparatus；
The material of cylinder is rustless steel.
The present invention specifically can be by the following technical solutions:
(1) preparation of iodine liquid: accurately weigh four kinds of analytical pure materials with analytical balance in beaker, is respectively
50.76 grams of iodine, 100.00 grams of potassium iodide, 90.00 grams of acetic acid and 10.00 gram 2,4-o-chlorphenol, with high-purity
Transfer to after water dissolution, in 1 liter of volumetric flask, use high purity water constant volume.Then the solution configured is transferred to 2
Rise in beaker, allow it fully react iodine liquid heated and stirred.In a solvent, iodine and iodide ion reaction generate I3 -
Ion: I2+I-→I3 -.The heating-up temperature of described iodine liquid is 40-60 degree Celsius；The described reacting by heating time is
15-60 minute.
(2) fibre bundle of clip about 10 centimeter length from fiber sample long filament, allows fibre bundle naturally scatter, will
It is divided into Small bunches of fibers, prevents from scattering by Small bunches of fibers knotting, accurately weighs fiber-like quality with analytical balance
Amount is to 2 significant digits.Described fiber sample number is 2-8；Described fiber sample quality causes according to fiber
Density difference can be adjusted, and the mass range weighed is 0.10 ± 0.01 gram-0.40 ± 0.01 gram.
(3) fiber sample weighed is sequentially placed in the cylinder with dividing plate, then cylinder is immersed iodine
In liquid, gentle agitation 30-60 minute.Described cylinder be rustless steel make a diameter of 10 centimetres deep be 4.5
Centimetre cylinder with holes；Described cylinder is arranged on the A-frame of 1.5 centimeter length, and this support is placed on magnetic
On power agitator；Described cylinder is made up of round-meshed rustless steel with lid, lid；In described cylinder
Face is divided into equally spaced 6 parts with stainless steel separator with holes, and iodide ion can be made to be free to circulation
And prevent sample from spilling.
(4) soaked fiber is taken out together with cylinder from iodine liquid, spray with the desalted water of 0.5L/min flow velocity
It is colourless for drenching washing sample to water, and the sample after having cleaned takes out from cylinder, is sequentially placed in centrifuge tube,
It is centrifuged with the speed of 4000 turns/min, sample centrifuge dripping after washing.The described wash spray time is
30-60 minute；Described centrifugation time is 30-60 minute.
(5) fiber sample after centrifugal is put in titration cup, adds the DMSO of 50 degree of 80-100 milliliter,
Stirred sample on magnetic stirring apparatus is until being completely dissolved.
(6) 0.1mol/L AgNO is used3Standard solution carries out constant-current titration on autotitrator, and titration uses
Linear titration, rate of titration is custom model, and titration rhythm is 0.01ml/s.Sample titration jump is linearly bent
Line, carries out derivation to titration curve, using the titration volumes corresponding to maximum derivative value as titration end-point volume.
(7) calculating of iodine absorption percentage composition:
The weight of W-fiber, g；
CAgNO3The concentration of-silver nitrate standard solution, mol/L；
VDripTitration consumes the volume of silver nitrate, mL.
The method of iodine absorption process test polyacrylonitrile fibre consistency described in the invention is an accurate side
Method, test process is the most controlled, it is desirable to specification, and accurately and reliably, comparability is strong for obtained parallel result.
Accompanying drawing explanation
Fig. 1 cylinder top view；
Fig. 2 cylinder side view；
Fig. 3 round barrel cover schematic diagram.
Description of reference numerals:
1 cylinder；2 dividing plates；3 A-frames；4 lids.
Detailed description of the invention
Below in conjunction with embodiment, further illustrate the present invention.
In embodiment raw materials used be commercially available.
Embodiment 1
Weigh iodine, potassium iodide, acetic acid and the dissolving of 2,4-o-chlorphenol 1L high purity water and be configured to 0.2mol/L
Iodine liquid, iodine and potassium iodide, acetic acid and 2, the mol ratio of 4-o-chlorphenol is: 1:3:7.5:0.3.So
After the solution configured is transferred in 2 liters of beakers, iodine liquid is heated to 60 degree stir 15 minutes.Respectively
Weigh the fibre bundle of same 8 parts of different qualities of batch, be put in successively in rustless steel cylinder, cylinder is immersed iodine
In liquid, gentle agitation 50 minutes.Afterwards soaked fiber is taken out together with cylinder from iodine liquid, use
The desalted water spray washing sample of 0.5L/min flow velocity 30 minutes is colourless to water.Fiber after having cleaned
Sample takes out from cylinder, is sequentially placed in centrifuge tube, is centrifuged 40 with the speed of 4000 turns/min
Minute, sample centrifuge dripping after washing.Fiber sample after centrifugal is put in titration cup, adds 80
The DMSO of 50 degree of milliliter, stirred sample on magnetic stirring apparatus is until being completely dissolved.Use 0.1mol/L
AgNO3Standard solution carries out constant-current titration on autotitrator, and titration uses linear titration, rate of titration
For custom model, titration rhythm is 0.01ml/s.Sample titration jump is linearly curve, enters titration curve
Row derivation, using the titration volumes corresponding to maximum derivative value as titration end-point volume VDrip.Substitute into formula meter
Calculate fiber iodine and absorb percentage composition result such as table 1.
Table 1
Embodiment 2
Iodine liquid is prepared with described in embodiment 1.Weigh the fiber-like that 5 parts of quality of same batch are 0.15 ± 0.01 gram
Product, are sequentially placed in rustless steel cylinder, are then placed in iodine liquid soaking, gentle agitation 60 minutes.Handle afterwards
Soaked fiber takes out from iodine liquid together with cylinder, with the desalted water spray washing sample of 0.5L/min flow velocity
50 minutes is colourless to water.Fiber sample after having cleaned takes out from cylinder, is sequentially placed in centrifuge tube,
It is centrifuged 60 minutes with the speed of 4000 turns/min, sample centrifuge dripping after washing.After centrifugal
Fiber sample is put in titration cup, adds the DMSO of 50 degree of 80 milliliters, stirs on magnetic stirring apparatus
Sample is until being completely dissolved.Use 0.1mol/L AgNO3Standard solution carries out constant-current titration on autotitrator,
Titration uses linear titration, and rate of titration is custom model, and titration rhythm is 0.01ml/s.Sample titration jump
Linear is curve, titration curve is carried out derivation, using the titration volumes corresponding to maximum derivative value as titration
Terminal volume VDrip.Substitute into formula and calculate fiber iodine absorption percentage composition result such as table 2.
Table 2
From the result of implementation of embodiment it will be seen that due to heterogeneous titration, how many pairs of sample size
The judgement of titration end-point has a very big impact.Result shows the knot taking sample size obtained by about 0.15 gram
The most more stable, average result standard deviation is little.
The inventive method is that iodine absorption process test polyacrylonitrile fibre consistency provides a set of standard criterion
Test process, the preparation condition of iodine liquid and process including specification；Devise special fiber to soak and washing
Device；For obtaining reliable and stable titration end-point, grope except the best in quality scope of fiber sample sampling；
And the selection of optimal titration mode.Test process is the most controlled, it is desirable to specification, obtained parallel junction
Really comparability is strong, and the result drawn is for expressing fiber consistency accurately and reliably.
Claims (9)
1. the method for testing of a polyacrylonitrile fibril fiber consistency, it is characterised in that described method includes:
(1) preparation of iodine liquid: iodine, potassium iodide, acetic acid and 2,4-o-chlorphenol is made into iodine liquid, and iodine liquid adds
Thermal agitation, fully reacts；
Wherein, iodine and potassium iodide, acetic acid and 2, the mol ratio of 4-o-chlorphenol is followed successively by: 1:(1～5): (5～8):
(0.1～0.5)；
(2) fibre bundle sample is weighed: the mass range weighed is 0.09-0.41 gram；
(3) fiber sample weighed is put in the cylinder with dividing plate, cylinder is immersed in iodine liquid and soak；
(4) soaked fiber desalted water spray washing sample to water be colourless after, be centrifuged dry；
(5) fiber sample after centrifugal is put in titration cup, adds the dimethyl sulfoxide of 80-100 milliliter,
Stirred sample is until being completely dissolved；
(6) carrying out constant-current titration on autotitrator with 0.1mol/L AgNO3 standard solution, titration is adopted
With linear titration, rate of titration is custom model, and titration rhythm is 0.01ml/s, and sample titration jump is linearly
Curve, carries out derivation to titration curve, using the titration volumes corresponding to maximum derivative value as titration end-point body
Long-pending；
(7) calculate iodine and absorb percentage composition.
2. the method for testing of polyacrylonitrile fibril fiber consistency as claimed in claim 1, it is characterised in that:
Described cylinder includes arranging on lid and cylinder, lid and cylinder porose, and cylinder interior is provided with longitudinal direction
Dividing plate with holes, dividing plate, centered by the axis of cylinder, is distributed radially, by the space average in cylinder
It is divided into N number of part, 2≤N≤10.
3. the method for testing of polyacrylonitrile fibril fiber consistency as claimed in claim 2, it is characterised in that:
Bore dia on cylinder is 0.1～0.5cm, every square centimeter of 1～100 hole.
4. the method for testing of polyacrylonitrile fibril fiber consistency as claimed in claim 1, it is characterised in that:
Iodine liquid concentration range is 0.1～0.5mol/L.
5. the method for testing of polyacrylonitrile fibril fiber consistency as claimed in claim 1, it is characterised in that:
In step (1), the heating-up temperature of iodine liquid is 40-60 degree Celsius；The described reacting by heating time is 15-60
Minute.
6. the method for testing of polyacrylonitrile fibril fiber consistency as claimed in claim 5, it is characterised in that:
In step (3), soak time is 30-60 minute.
7. the method for testing of polyacrylonitrile fibril fiber consistency as claimed in claim 6, it is characterised in that:
Step (4) it is 30-60 minute with the desalted water spray washing time；Described centrifugation time is 30-60
Minute.
8. the method for testing of polyacrylonitrile fibril fiber consistency as claimed in claim 7, it is characterised in that:
In step (5), the temperature of dimethyl sulfoxide is not higher than 60 DEG C.
9. the method for testing of polyacrylonitrile fibril fiber consistency as claimed in claim 2, it is characterised in that:
Described cylinder is arranged on A-frame, and support is placed on magnetic stirring apparatus；
The material of cylinder is rustless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266264.0A CN105954342A (en) | 2016-04-26 | 2016-04-26 | Method for testing density of polyacrylonitrile protofilament fibers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266264.0A CN105954342A (en) | 2016-04-26 | 2016-04-26 | Method for testing density of polyacrylonitrile protofilament fibers |
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|---|---|
| CN105954342A true CN105954342A (en) | 2016-09-21 |
Family
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| CN201610266264.0A Pending CN105954342A (en) | 2016-04-26 | 2016-04-26 | Method for testing density of polyacrylonitrile protofilament fibers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873671A (en) * | 2018-08-30 | 2020-03-10 | 兰州蓝星纤维有限公司 | Method for measuring solubility of pre-oxidized fibers |
| CN111413457A (en) * | 2020-04-21 | 2020-07-14 | 山东东岳高分子材料有限公司 | Method for measuring peroxide content in perfluoropolyether by potentiometric titration |
| CN113917073A (en) * | 2021-10-11 | 2022-01-11 | 聚光科技(杭州)股份有限公司 | Detection method based on titration technology |
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|---|---|---|---|---|
| JPS5764615A (en) * | 1980-10-08 | 1982-04-19 | Nippon Sekijiyuujishiya | Separating and recovering apparatus of blood component |
| JPS58214518A (en) * | 1982-06-09 | 1983-12-13 | Toray Ind Inc | Acrylic precursor yarn bundle |
| CN1316027A (en) * | 1998-07-22 | 2001-10-03 | 三菱丽阳株式会社 | Acrylonitril-based precursor fiber for carbon fiber and method for production thereof |
| JP2003213022A (en) * | 2001-11-06 | 2003-07-30 | Tomey Corp | Simple method for producing iodine-including article and iodine gas sustained releaser having resistance to water and disinfection system using the same |
| CN1685095A (en) * | 2002-09-30 | 2005-10-19 | 帝人株式会社 | Carbon fiber and process and composition for the production of felt |
-
2016
- 2016-04-26 CN CN201610266264.0A patent/CN105954342A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5764615A (en) * | 1980-10-08 | 1982-04-19 | Nippon Sekijiyuujishiya | Separating and recovering apparatus of blood component |
| JPS58214518A (en) * | 1982-06-09 | 1983-12-13 | Toray Ind Inc | Acrylic precursor yarn bundle |
| CN1316027A (en) * | 1998-07-22 | 2001-10-03 | 三菱丽阳株式会社 | Acrylonitril-based precursor fiber for carbon fiber and method for production thereof |
| JP2003213022A (en) * | 2001-11-06 | 2003-07-30 | Tomey Corp | Simple method for producing iodine-including article and iodine gas sustained releaser having resistance to water and disinfection system using the same |
| CN1685095A (en) * | 2002-09-30 | 2005-10-19 | 帝人株式会社 | Carbon fiber and process and composition for the production of felt |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873671A (en) * | 2018-08-30 | 2020-03-10 | 兰州蓝星纤维有限公司 | Method for measuring solubility of pre-oxidized fibers |
| CN111413457A (en) * | 2020-04-21 | 2020-07-14 | 山东东岳高分子材料有限公司 | Method for measuring peroxide content in perfluoropolyether by potentiometric titration |
| CN113917073A (en) * | 2021-10-11 | 2022-01-11 | 聚光科技(杭州)股份有限公司 | Detection method based on titration technology |
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