CN106283600A - A kind of preparation method of functionalized carbon fiber - Google Patents
A kind of preparation method of functionalized carbon fiber Download PDFInfo
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- CN106283600A CN106283600A CN201610653977.2A CN201610653977A CN106283600A CN 106283600 A CN106283600 A CN 106283600A CN 201610653977 A CN201610653977 A CN 201610653977A CN 106283600 A CN106283600 A CN 106283600A
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- carbon fiber
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/40—Fibres of carbon
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
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- Plasma & Fusion (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The present invention relates to the preparation method of a kind of functionalized carbon fiber, use thermoplastic resin as the surface graft material of carbon fiber, by carbon fiber by plasma surface modification, at graft thermoplastic resin, high performance composite can be formed.It is an advantage of the current invention that carbon fiber surface modification device therefor investment cost is low, invention low cost, simple to operate, the suitability is strong, the loss of high treating effect, fibre property is little, reliable in quality.Shorten modification time in a large number, reduce chemicals usage and product cost, reduce environmental pollution, it is adaptable to industrialized production.
Description
Technical field
The invention belongs to carbon fiber surface modification technical field, particularly to the preparation method of a kind of functionalized carbon fiber.
Background technology
Carbon fiber refers to that the phosphorus content fibrous material more than more than 85%, including carbon fibre and graphite through high temperature cabonization
Fiber.Carbon fibre is organic fiber after 1000～2300 DEG C process, and phosphorus content is the fiber of 85%～95%；Graphite fibre
Being organic fiber processes through more than 2300 DEG C, phosphorus content fiber more than 98%, carbon fiber as a kind of high-performance fiber, because of
There is the characteristics such as specific strength is high, specific modulus is high, thermal coefficient of expansion is little, coefficient of friction is low, resistance to low temperature is good and become in recent years
Carry out the most important reinforcing material of polymer matrix composites, be widely used in Aero-Space component and sports goods.Carbon fiber
Surface is inert, and specific surface area is little, and edge active carbon atom is few, and surface can low and resin wellability and two-phase interface caking property
Difference, composite interlayer shear strength (Interlaminar Shearing Strength, ILSS) is low.Thus affect composite wood
The performance of material combination property, constrains the carbon fiber further genralrlization application in advanced field of compound material.Fine in order to improve carbon
Dimension strengthens the performance of polymer matrix composites, must be modified carbon fiber surface, to improve the viscous of carbon fiber and other materials
Knot ability.
For improving the adhesion of carbon fiber and resin matrix etc., improving the shearing strength between layers of composite and the table that must carry out
Face processes.Purpose is to increase the polar group such as functional group such as carboxyl, carbonyl and lactone of carbon fiber, increases surface area, improve with
The wellability of resin matrix and cohesive force.The front method being modified carbon fiber surface is more, mainly includes (1) liquid phase oxidation
Method (2) plasma processing method (3) anode electrolysis or electrodeposition process method (4) ozone facture；(5) vapour phase oxidation process (6) table
Face high-energy radiation method (7) modification by copolymerization method and coupling agent treatment etc..These methods can substantially meet carbon fiber surface
Modified can need, but technique is complex, process the time long, the problems such as surface modification is uneven.
Carbon fiber is as excellent composite reinforcement, in its actual application, in order to repair defect, further
Improve performance, and meet different use demands, often at the material that carbon fiber surface grafting is new.
It is good that this material of thermoplastic resin has shock resistance, excellent electric property, current existing plasma
Treatment of Carbon process for modifying surface patent is without reference to the method for the surface modification of plasma grafting thermoplastic resin.
Summary of the invention
Solve the technical problem that
In place of the deficiencies in the prior art, the present invention proposes the preparation method of a kind of functionalized carbon fiber, uses
Thermoplastic resin is as the surface graft material of carbon fiber, by carbon fiber by plasma surface modification, at graft thermoplastic
Resin, can form high performance composite, low cost of the present invention, and simple to operate, the suitability is strong.
Technical scheme
The preparation method of a kind of functionalized carbon fiber, it is characterised in that step is as follows:
Step 1: be placed on plasma device by carbon fiber, under open environment, by plasma jet to carbon fiber surface
Face, makes carbon fiber move in plasma atmosphere, and process power is 100W-1000W, and the time is 10s-900s, produces surface
Modified；The carbon fiber handled well is dried under vacuum to constant weight at 40～60 DEG C, obtains plasma-treated carbon fiber；
Step 2: plasma treated carbon fiber is added in thermoplastic resin grafting liquid, supersound process 10～50min,
Then mixed liquor is warming up to 50～100 DEG C, in isothermal reaction 9～12h, then by anti-for the carbon fiber deionized water that has been grafted
After backwashing is washed 4～6 times, then will washing after carbon fiber at 40～60 DEG C vacuum to being dried to obtain functionalized carbon fiber；Described heat
Plastic resin grafting liquid is to add in organic solution by thermoplastic resin, supersound process 10～50min, obtains thermoplastic resin grafting
Liquid, concentration is the sol solutions of 1～10g/L.
Described carbon fiber is carbon fiber wire, any one in unidirectional long fibre cloth, two-way textile sheet, random chopped fiber
Or its multiple combination.
Described plasma device is plasma generator.
Plasma source in described plasma generator includes selected from least one source following: dielectric barrier discharge DBD
Plasma source, surface-discharge SD plasma source, body electric discharge VD plasma source, plasmatorch source, arc plasma torch, slip electric arc
Plasmatorch, cold plasmatorch, direct current plasma source, pulse plasma source, magnetron plasma source, inductive couple plasma
Source, serpentine pipe plasma source, helical resonator plasma source, microwave plasma source, atmospheric pressure plasma injection APPJ source, electricity
Corona plasma source, micro-plasma source, low-voltage plasma source or high pressure plasma source.
Plasma atmosphere is produced by plasma generator, and is ejected into room temperature, normal pressure, big compression ring via nozzle mechanism
The plasma atmosphere formed in border.
Described organic solvent selected from hexane, trifluoroacetic acid, carbon tetrachloride, toluene, propanol, ethyl acetate, acetone, acetic acid,
One or more in methanol, ethylene glycol, Carbon bisulfide, trichloroethane, butanone, ether.
Described thermoplastic resin gathers selected from PE-polyethylene, PVC-polrvinyl chloride, PS-polystyrene, PA-polyamide, POM-
Any one in formaldehyde, PC-Merlon, polyphenylene oxide, polysulfones, rubber etc. or its multiple combination.
Plasma in described plasma source is selected from He, Ar, Ne, Xe, air, N2, O2, H2O or CO2.
Plasma in described plasma source selected from the halogen compounds gas CF4 of freon Freon gas, CHF3,
C3F6 or C4F8.
Plasma in described plasma source breathes out dragon gas, NH3, NF3 or SF6 selected from halon.
Plasma in described plasma source selected from organic compound gas CH4, C2H6, C2H4, C2H2, C6H6 or
C2H5OH；NOx, SO2 or silane and selected from their admixture of gas.
Beneficial effect
The preparation method of a kind of functionalized carbon fiber that the present invention proposes, uses thermoplastic resin as the surface of carbon fiber
Graft materials, by carbon fiber by plasma surface modification, at graft thermoplastic resin, can form high performance composite wood
Material.It is an advantage of the current invention that carbon fiber surface modification device therefor investment cost is low, invention low cost, simple to operate, applicable
Property strong, the loss of high treating effect, fibre property is little, reliable in quality.Shorten modification time in a large number, reduce chemicals usage and product
Cost, reduces environmental pollution, it is adaptable to industrialized production.
Detailed description of the invention
In conjunction with embodiment, the invention will be further described:
Example 1:
(1) carbon fiber is placed on oxygen plasma body device, under open environment, oxygen plasma is ejected into carbon fiber surface
Face, makes carbon fiber move in oxygen plasma atmosphere, and process power is 100W, and the time is 60s, produces surface modification.At Jiang
The carbon fiber managed is dried under vacuum to constant weight at 60 DEG C, obtains the carbon fiber processed through oxygen plasma.(2) by poly-for PE-second
Olefine resin adds in acetone soln, and supersound process 20min obtains the poly-second of PE-that PE-polyethylene/acetone grafting liquid concentration is 3g/L
Alkene/acetone grafting liquid.(3) plasma treated carbon fiber is added in the PE-polyethylene/acetone grafting liquid of step 2 gained,
After allowing, mixed liquor is warming up to 70 DEG C, at isothermal reaction 10h, the carbon fiber deionized water cyclic washing 6 being grafted after allowing
Secondary, then the vacuum at 60 DEG C of the carbon fiber after washing is extremely dried,
Example 2:
(1) carbon fiber is placed on argon plasma body device, under open environment, argon plasma is ejected into carbon fiber surface
Face, makes carbon fiber move in argon plasma atmosphere, and process power is 100W, and the time is 60s, produces surface modification.At Jiang
The carbon fiber managed is dried under vacuum to constant weight at 60 DEG C, obtains the carbon fiber processed through argon plasma.(2) by poly-for PE-second
Olefine resin adds in acetone soln, and supersound process 20min obtains the poly-second of PE-that PE-polyethylene/acetone grafting liquid concentration is 3g/L
Alkene/acetone grafting liquid.(3) plasma treated carbon fiber is added in the PE-polyethylene/acetone grafting liquid of step 2 gained,
After allowing, mixed liquor is warming up to 70 DEG C, at isothermal reaction 10h, the carbon fiber deionized water cyclic washing 6 being grafted after allowing
Secondary, then the vacuum at 60 DEG C of the carbon fiber after washing is extremely dried.
Claims (10)
1. the preparation method of a functionalized carbon fiber, it is characterised in that step is as follows:
Step 1: be placed on plasma device by carbon fiber, under open environment, by plasma jet to carbon fiber surface, makes
Carbon fiber moves in plasma atmosphere, and process power is 100W-1000W, and the time is 10s-900s, produces surface modification；
The carbon fiber handled well is dried under vacuum to constant weight at 40～60 DEG C, obtains plasma-treated carbon fiber；
Step 2: plasma treated carbon fiber is added in thermoplastic resin grafting liquid, supersound process 10～50min, then
Mixed liquor is warming up to 50～100 DEG C, in isothermal reaction 9～12h, then the carbon fiber deionized water being grafted is washed repeatedly
Wash 4～6 times, then will washing after carbon fiber at 40～60 DEG C vacuum to being dried to obtain functionalized carbon fiber；Described thermoplasticity
Resin grafting liquid is to add in organic solution by thermoplastic resin, and supersound process 10～50min obtains thermoplastic resin grafting liquid,
Concentration is the sol solutions of 1～10g/L.
The preparation method of functionalized carbon fiber the most according to claim 1, it is characterised in that: described carbon fiber is carbon fiber
Silk, any one in unidirectional long fibre cloth, two-way textile sheet, random chopped fiber or its multiple combination.
The preparation method of functionalized carbon fiber the most according to claim 1, it is characterised in that: described plasma device is
Plasma generator.
The preparation method of functionalized carbon fiber the most according to claim 3, it is characterised in that: in described plasma generator
Plasma source include selected from least one source following: dielectric barrier discharge DBD plasma source, surface-discharge SD plasma source,
Body electric discharge VD plasma source, plasmatorch source, arc plasma torch, slip arc plasma torch, cold plasmatorch, direct current etc. from
Component, pulse plasma source, magnetron plasma source, inductive couple plasma source, serpentine pipe plasma source, helical resonator etc.
Ion source, microwave plasma source, atmospheric pressure plasma injection APPJ source, corona discharge plasma source, micro-plasma source, low pressure
Plasma source or high pressure plasma source.
The preparation method of functionalized carbon fiber the most according to claim 1, it is characterised in that: described organic solvent selects oneself
Alkane, trifluoroacetic acid, carbon tetrachloride, toluene, propanol, ethyl acetate, acetone, acetic acid, methanol, ethylene glycol, Carbon bisulfide, three chloroethenes
One or more in alkane, butanone, ether.
The preparation method of functionalized carbon fiber the most according to claim 1, it is characterised in that: described thermoplastic resin is selected from
PE-polyethylene, PVC-polrvinyl chloride, PS-polystyrene, PA-polyamide, POM-polyformaldehyde, PC-Merlon, polyphenylene oxide, poly-
Any one in sulfone, rubber etc. or its multiple combination.
The preparation method of functionalized carbon fiber the most according to claim 4, it is characterised in that: the grade in described plasma source from
Daughter is selected from He, Ar, Ne, Xe, air, N2, O2, H2O or CO2.
The preparation method of functionalized carbon fiber the most according to claim 4, it is characterised in that: the grade in described plasma source from
Daughter is selected from halogen compounds gas CF4, CHF3, C3F6 or C4F8 of freon Freon gas.
The preparation method of functionalized carbon fiber the most according to claim 4, it is characterised in that: the grade in described plasma source from
Daughter breathes out dragon gas, NH3, NF3 or SF6 selected from halon.
The preparation method of functionalized carbon fiber the most according to claim 4, it is characterised in that: in described plasma source etc.
Gas ions is selected from organic compound gas CH4, C2H6, C2H4, C2H2, C6H6 or C2H5OH；NOx, SO2 or silane and be selected from
Their admixture of gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610653977.2A CN106283600A (en) | 2016-08-11 | 2016-08-11 | A kind of preparation method of functionalized carbon fiber |
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| CN201610653977.2A CN106283600A (en) | 2016-08-11 | 2016-08-11 | A kind of preparation method of functionalized carbon fiber |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532287A (en) * | 2018-03-30 | 2018-09-14 | 深圳烯湾科技有限公司 | The surface modification method of carbon nano-tube fibre |
| CN110204799A (en) * | 2019-06-06 | 2019-09-06 | 江苏通用科技股份有限公司 | A kind of absorbing sound and lowering noise tyre stock and preparation method thereof |
| CN111215739A (en) * | 2020-01-07 | 2020-06-02 | 沈阳航空航天大学 | Method for preparing resistance welding heating element by using carbon fiber treated by plasma |
| CN113026369A (en) * | 2021-03-09 | 2021-06-25 | 西北工业大学 | Ceramizable coating coated fiber and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500826A (en) * | 2002-11-13 | 2004-06-02 | 黄金富 | New pattern rubber formed by combining with the carbon fiber modified with plasma |
| CN101733938A (en) * | 2008-11-11 | 2010-06-16 | 和硕联合科技股份有限公司 | Method for manufacturing carbon fiber composite materials |
| CN103205008A (en) * | 2013-04-12 | 2013-07-17 | 哈尔滨工业大学 | Method for improving interface toughness of carbon fiber reinforced epoxy resin matrix composite |
| CN103321034A (en) * | 2013-06-29 | 2013-09-25 | 西北工业大学 | Surface modification method of carbon fibre plasma grafted carbon nano-tube |
| CN103451931A (en) * | 2012-06-04 | 2013-12-18 | 金发科技股份有限公司 | Carbon fiber surface modifier, modified carbon fiber, composite material, and preparation methods thereof |
| CN103978696A (en) * | 2014-05-12 | 2014-08-13 | 东华大学 | Preparation technology of continuous functionalized carbon fiber enhanced thermoplastic resin base prepreg tape |
| JP5713114B2 (en) * | 2012-09-06 | 2015-05-07 | 三菱レイヨン株式会社 | Carbon fiber bundle for resin reinforcement and method for producing the same, carbon fiber reinforced thermoplastic resin composition and molded article thereof |
-
2016
- 2016-08-11 CN CN201610653977.2A patent/CN106283600A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500826A (en) * | 2002-11-13 | 2004-06-02 | 黄金富 | New pattern rubber formed by combining with the carbon fiber modified with plasma |
| CN101733938A (en) * | 2008-11-11 | 2010-06-16 | 和硕联合科技股份有限公司 | Method for manufacturing carbon fiber composite materials |
| CN103451931A (en) * | 2012-06-04 | 2013-12-18 | 金发科技股份有限公司 | Carbon fiber surface modifier, modified carbon fiber, composite material, and preparation methods thereof |
| JP5713114B2 (en) * | 2012-09-06 | 2015-05-07 | 三菱レイヨン株式会社 | Carbon fiber bundle for resin reinforcement and method for producing the same, carbon fiber reinforced thermoplastic resin composition and molded article thereof |
| CN103205008A (en) * | 2013-04-12 | 2013-07-17 | 哈尔滨工业大学 | Method for improving interface toughness of carbon fiber reinforced epoxy resin matrix composite |
| CN103321034A (en) * | 2013-06-29 | 2013-09-25 | 西北工业大学 | Surface modification method of carbon fibre plasma grafted carbon nano-tube |
| CN103978696A (en) * | 2014-05-12 | 2014-08-13 | 东华大学 | Preparation technology of continuous functionalized carbon fiber enhanced thermoplastic resin base prepreg tape |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532287A (en) * | 2018-03-30 | 2018-09-14 | 深圳烯湾科技有限公司 | The surface modification method of carbon nano-tube fibre |
| CN110204799A (en) * | 2019-06-06 | 2019-09-06 | 江苏通用科技股份有限公司 | A kind of absorbing sound and lowering noise tyre stock and preparation method thereof |
| CN110204799B (en) * | 2019-06-06 | 2021-12-14 | 江苏通用科技股份有限公司 | Sound-absorbing noise-reducing tire rubber material and preparation method thereof |
| CN111215739A (en) * | 2020-01-07 | 2020-06-02 | 沈阳航空航天大学 | Method for preparing resistance welding heating element by using carbon fiber treated by plasma |
| CN113026369A (en) * | 2021-03-09 | 2021-06-25 | 西北工业大学 | Ceramizable coating coated fiber and preparation method and application thereof |
| CN113026369B (en) * | 2021-03-09 | 2022-03-11 | 西北工业大学 | Ceramizable coating coated fiber and preparation method and application thereof |
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Application publication date: 20170104 |