CN109853244A - A kind of preparation method of high-strength aramid II - Google Patents
A kind of preparation method of high-strength aramid II Download PDFInfo
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- CN109853244A CN109853244A CN201811597734.7A CN201811597734A CN109853244A CN 109853244 A CN109853244 A CN 109853244A CN 201811597734 A CN201811597734 A CN 201811597734A CN 109853244 A CN109853244 A CN 109853244A
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- aramid
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- cationic surfactant
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Abstract
The invention discloses a kind of preparation methods of high-strength aramid II, belong to aramid II preparation technical field.The method of the invention first pre-processes aramid II fiber impregnation in pretreatment fluid；Pretreatment fluid is aqueous polyurethane/polyacrylate nano-composite emulsion and silane coupling agent mixed liquor；Distilled water flushing will be used by pretreated aramid II fiber, rinsed to content of microorganisms≤500mg/100ml.Aramid II fiber after washing is put into cationic surfactant solution and is impregnated, the temperature of cationic surfactant solution is 100~130 DEG C；Treated aramid II fiber is carried out except water process, the water content of the aramid II fiber after water removal is more than the half of aramid II fiber quality.The aramid II of high-strength is finally obtained, the aramid II intensity >=24.2g/d；Elongation is 2.9~3.2%；Modulus > 800g/d.
Description
Technical field
The present invention relates to a kind of preparation methods of high-strength aramid II, belong to aramid II preparation technical field.
Background technique
P-aramid fiber is the abbreviation of p -aromatic polyamide fiber, it is best organic of comprehensive performance in synthetic fibers
One of fiber.The para-aramid fiber of industrialized production is mainly poly(p-phenylene terephthalamide) (PPTA) fiber at present.Beauty
Dupont company, state trade name Kevlar, Japanese Teijin company trade name Twaron, China is known as aramid II or aramid fiber
1414。
Aramid II is prepared by solute liquid crystal polymer (LLCP) by dry-jet wet-spinning technique spinning, with height-oriented rigid
Property molecular chain structure imparts fiber high-strength degree, high-modulus, high temperature resistant, endurance, wear-resistant, corrosion resistant excellent properties.Cause
This, Fanglun l414, in national economy every profession and trade, is especially gone in national defense industry, space flight, aviation, rubber etc. with its brilliant performance
Industry is widely used.
Aramid II is a kind of height-oriented crystalline domains material, has certain defect and gap, but do not have amorphous region.By
The steric hindrance of huge phenyl ring in strand, amide group is more difficult to be chemically reacted with other functional groups, causes aramid fiber fine
It is poor with the composite performance of space flight, rubber material to tie up.Therefore, we are modified processing to fiber surface using chemical method, lead to
Introducing active function groups are crossed, covalent bond is being generated with space flight, rubber material matrix compound tense, is enhancing the adhesiveness of composite material
Energy.
Physical property in order to guarantee fiber after softening is constant, and the as-spun fibre draw ratio technology controlling and process in coagulating bath is to fibre
Tieing up mechanical property has great influence.In addition it is also necessary to spin-drawing processing technique be carried out before modification, wherein being classified rinsing maching
Spinning speed be the key that draw ratio control.If draw ratio is excessive in washing process, fiber is easily broken, and has color difference；
If draw ratio is too small, acid contained in fiber is not extracted completely, and the physical property of fiber will receive very big influence.Therefore, right
The key technology that draw ratio control is production is washed on production line.
Aramid II is stretched in washing process, macromolecular chain can during stretching continuous arrangement it is neat, but draw
After stretching, the macromolecular chain of fiber can gradually taper up recovery.For the continuous arrangement for macromolecular chain of being formed, need after washing
Drying in carry out hot-stretch sizing.Suitable fiber hot-stretch temperature and hot-draw ratio are selected, directly determines the physics of fiber
Performance.
The main indicator for judging whether aramid II belongs to high-strength includes intensity, elongation and modulus.Therefore, how to improve
Intensity, elongation and the modulus of aramid II are the main direction of development for producing high-strength aramid II.
Summary of the invention
In order to solve technical problem present in currently available technology, the invention proposes high-strength aramid II and its preparations
Method.The present invention has obtained the aramid II of high-strength by carrying out surface modification treatment to aramid II using activating reagent.
To achieve the goals above, technical scheme is as follows:
The invention discloses high-strength aramid IIs, meet: intensity >=24.2g/d；Elongation is 2.9~3.2%；Modulus > 800g/
d。
The invention also discloses a kind of preparation methods of high-strength aramid II, comprising the following steps:
A. it pre-processes
Aramid II fiber impregnation is pre-processed in pretreatment fluid；The pretreatment fluid is aqueous polyurethane/polyacrylic acid
The mixed liquor of ester nano-composite emulsion and silane coupling agent；The pretreated time is 40~80min.
B. it washes
Distilled water flushing is used by pretreated aramid II fiber is passed through in step A, is rinsed to content of microorganisms≤500mg/
100ml。
C. activating reagent solution is handled
Aramid II fiber in step B after washing is put into cationic surfactant solution and is impregnated, cationic surface
The temperature of activator solution is 100~130 DEG C；Cationic surfactant solution soaking time is 2~4h.
D. it removes water
It will carry out by the aramid II fiber of step C processing except water process, the water content of the aramid II fiber after water removal is more than virtue
The half of II fiber quality of synthetic fibre.
E. it dries
Drying and processing will be carried out by the aramid II fiber of step D water removal, is dried to the water content of aramid II fiber lower than 3%, obtains
To high-strength aramid II.
Further, in step A of the invention, the temperature of pretreatment fluid is 80~120 DEG C.
Further, in step B of the invention, the time of distilled water flushing is at least 2h.
Further, in step C of the invention, the cationic surfactant solution uses cationic surfactant
It is made, the cationic surfactant is fatty amine salt, ethanolamine salt and polyethylene polyamine salt.
Further, in step E of the invention, drying temperature is 100~120 DEG C.
Bring of the present invention has the beneficial effect that
(1) present invention includes five pretreatment, washing, the processing of activating reagent solution, water removal and drying steps.It is first right to pre-process
Aramid II fiber is softened, and is allowed it to be easier to be modified, is then washed, pass through cationic surfactant solution after washing
It is modified, then dries.Preparation method is simple, is suitable for industrialized production.
(2) present invention preparation has finally obtained the aramid II of high-strength, the aramid II intensity >=24.2g/d；Elongation is
2.9~3.2%；Modulus > 800g/d.With good intensity, elongation and modulus properties, more applied fields can be suitable for
Scape, and there is good use feeling.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than comprehensive embodiment.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Embodiment 1
The invention discloses high-strength aramid IIs, meet: intensity >=24.2g/d；Elongation is 2.9~3.2%；Modulus > 800g/
d。
It is as shown in the table with the comparison of the prior art:
Embodiment 2
The invention also discloses a kind of preparation methods of high-strength aramid II, comprising the following steps:
A. it pre-processes
Aramid II fiber impregnation is pre-processed in pretreatment fluid；The pretreatment fluid is aqueous polyurethane/polyacrylic acid
The mixed liquor of ester nano-composite emulsion and silane coupling agent；The pretreated time is 40~80min.
B. it washes
Distilled water flushing is used by pretreated aramid II fiber is passed through in step A, is rinsed to content of microorganisms≤500mg/
100ml。
C. activating reagent solution is handled
Aramid II fiber in step B after washing is put into cationic surfactant solution and is impregnated, cationic surface
The temperature of activator solution is 100~130 DEG C；Cationic surfactant solution soaking time is 2~4h.
D. it removes water
It will carry out by the aramid II fiber of step C processing except water process, the water content of the aramid II fiber after water removal is more than virtue
The half of II fiber quality of synthetic fibre.
E. it dries
Drying and processing will be carried out by the aramid II fiber of step D water removal, is dried to the water content of aramid II fiber lower than 3%, obtains
To high-strength aramid II.
Embodiment 3
The present embodiment advanced optimizes on the basis of embodiment 2: in step A of the invention, the temperature of pretreatment fluid is 80
~120 DEG C.
Embodiment 4
The present embodiment advanced optimizes on the basis of embodiment 2: in step B of the invention, the time of distilled water flushing is extremely
It is less 2h.
Embodiment 5
The present embodiment advanced optimizes on the basis of embodiment 2: in step C of the invention, the cation surface activating
Agent solution is made of cationic surfactant, and the cationic surfactant is fatty amine salt, ethanolamine salt and poly- second
Alkene polyamines salt.
Embodiment 6
The present embodiment advanced optimizes on the basis of embodiment 2: in step E of the invention, drying temperature is 100~120
℃。
Embodiment 7
The invention also discloses a kind of preparation methods of high-strength aramid II, comprising the following steps:
A. it pre-processes
Aramid II fiber impregnation is pre-processed in pretreatment fluid；The pretreatment fluid is aqueous polyurethane/polyacrylic acid
The mixed liquor of ester nano-composite emulsion and silane coupling agent；The pretreated time is 40~80min.
The temperature of pretreatment fluid is 80~120 DEG C.
B. it washes
Distilled water flushing is used by pretreated aramid II fiber is passed through in step A, is rinsed to content of microorganisms≤500mg/
100ml。
The time of distilled water flushing is at least 2h.
C. activating reagent solution is handled
Aramid II fiber in step B after washing is put into cationic surfactant solution and is impregnated, cationic surface
The temperature of activator solution is 100~130 DEG C；Cationic surfactant solution soaking time is 2~4h.
The cationic surfactant solution is made of cationic surfactant, the cationic surfactant
For fatty amine salt, ethanolamine salt and polyethylene polyamine salt.
D. it removes water
It will carry out by the aramid II fiber of step C processing except water process, the water content of the aramid II fiber after water removal is more than virtue
The half of II fiber quality of synthetic fibre.
E. it dries
Drying and processing will be carried out by the aramid II fiber of step D water removal, is dried to the water content of aramid II fiber lower than 3%, obtains
To high-strength aramid II.
Drying temperature is 100~120 DEG C.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit any simple modification to the above embodiments of the invention, equivalent variations, protection of the invention is each fallen within
Within the scope of.
Claims (6)
1. a kind of preparation method of high-strength aramid II, it is characterised in that: the following steps are included:
A. it pre-processes
Aramid II fiber impregnation is pre-processed in pretreatment fluid；The pretreatment fluid is aqueous polyurethane/polyacrylic acid
The mixed liquor of ester nano-composite emulsion and silane coupling agent；The pretreated time is 40~80min；
B. it washes
Distilled water flushing is used by pretreated aramid II fiber is passed through in step A, is rinsed to content of microorganisms≤500mg/
100ml；
C. activating reagent solution is handled
Aramid II fiber in step B after washing is put into cationic surfactant solution and is impregnated, cationic surface
The temperature of activator solution is 100~130 DEG C；Cationic surfactant solution soaking time is 2~4h；
D. it removes water
It will carry out by the aramid II fiber of step C processing except water process, the water content of the aramid II fiber after water removal is more than virtue
The half of II fiber quality of synthetic fibre；
E. it dries
Drying and processing will be carried out by the aramid II fiber of step D water removal, is dried to the water content of aramid II fiber lower than 3%, obtains
To high-strength aramid II.
2. the preparation method of high-strength aramid II as described in claim 1, it is characterised in that: high-strength obtained in step E
Aramid II meets: the high-strength aramid II meets: intensity >=24.2g/d；Elongation is 2.9~3.2%；Modulus > 800g/d.
3. the preparation method of high-strength aramid II as described in claim 1, it is characterised in that: in step A, the temperature of pretreatment fluid
Degree is 80~120 DEG C.
4. the preparation method of high-strength aramid II as described in claim 1, it is characterised in that: in step B, distilled water flushing
Time is at least 2h.
5. the preparation method of high-strength aramid II as described in claim 1, it is characterised in that: in step C, the cation form
Face activator solution is made of cationic surfactant, and the cationic surfactant is fatty amine salt, ethanolamine salt
And polyethylene polyamine salt.
6. the preparation method of high-strength aramid II as described in claim 1, it is characterised in that: in step E, drying temperature is
100~120 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811597734.7A CN109853244A (en) | 2018-12-26 | 2018-12-26 | A kind of preparation method of high-strength aramid II |
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| CN201811597734.7A CN109853244A (en) | 2018-12-26 | 2018-12-26 | A kind of preparation method of high-strength aramid II |
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| CN109853244A true CN109853244A (en) | 2019-06-07 |
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ID=66892503
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Citations (7)
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|---|---|---|---|---|
| WO2002102901A2 (en) * | 2001-02-02 | 2002-12-27 | Stockhausen Gmbh & Co. Kg | Composition for dyeing material of synthetic aromatic polyamide fibers comprising a cationic dye |
| JP4624601B2 (en) * | 2001-06-14 | 2011-02-02 | 竹本油脂株式会社 | Synthetic fiber treatment agent for carbon fiber production and method for treating synthetic fiber for carbon fiber production |
| CN103866554A (en) * | 2014-03-18 | 2014-06-18 | 东华大学 | Method for preparing para-aramid with high surface adhesivity |
| CN102797152B (en) * | 2012-08-15 | 2014-09-17 | 中蓝晨光化工研究设计院有限公司 | Aramid fiber surface modification method |
| CN105803789A (en) * | 2016-03-29 | 2016-07-27 | 深圳市新纶科技股份有限公司 | Surface modification aramid fiber and preparation method thereof |
| CN105821656A (en) * | 2016-06-07 | 2016-08-03 | 常州纺织服装职业技术学院 | Modified aramid fibers and insulating rope prepared from same and preparation methods thereof |
| CN108610628A (en) * | 2018-04-27 | 2018-10-02 | 华南理工大学 | A kind of composite material and preparation method of modified carbon fiber/nanometer aramid fiber |
-
2018
- 2018-12-26 CN CN201811597734.7A patent/CN109853244A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002102901A2 (en) * | 2001-02-02 | 2002-12-27 | Stockhausen Gmbh & Co. Kg | Composition for dyeing material of synthetic aromatic polyamide fibers comprising a cationic dye |
| JP4624601B2 (en) * | 2001-06-14 | 2011-02-02 | 竹本油脂株式会社 | Synthetic fiber treatment agent for carbon fiber production and method for treating synthetic fiber for carbon fiber production |
| CN102797152B (en) * | 2012-08-15 | 2014-09-17 | 中蓝晨光化工研究设计院有限公司 | Aramid fiber surface modification method |
| CN103866554A (en) * | 2014-03-18 | 2014-06-18 | 东华大学 | Method for preparing para-aramid with high surface adhesivity |
| CN105803789A (en) * | 2016-03-29 | 2016-07-27 | 深圳市新纶科技股份有限公司 | Surface modification aramid fiber and preparation method thereof |
| CN105821656A (en) * | 2016-06-07 | 2016-08-03 | 常州纺织服装职业技术学院 | Modified aramid fibers and insulating rope prepared from same and preparation methods thereof |
| CN108610628A (en) * | 2018-04-27 | 2018-10-02 | 华南理工大学 | A kind of composite material and preparation method of modified carbon fiber/nanometer aramid fiber |
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Application publication date: 20190607 |