CN85107069A - The electrodeposition process of carbon fiber surface - Google Patents
The electrodeposition process of carbon fiber surface Download PDFInfo
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- CN85107069A CN85107069A CN 85107069 CN85107069A CN85107069A CN 85107069 A CN85107069 A CN 85107069A CN 85107069 CN85107069 CN 85107069 CN 85107069 A CN85107069 A CN 85107069A CN 85107069 A CN85107069 A CN 85107069A
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Abstract
The invention relates to the electro-deposition method on Treatment of Carbon surface, to be the effect that utilizes DC electric field be deposited on the carboxy-containing copolymer of vinyl monomer and maleic anhydride as on the anodic carbon fiber surface for it.At molecular weight is in the 1.5-5.0% ammonium salt aqueous solution of aforementioned multipolymer of 2000-6000, with the 0.3-1.0 milliampere/centimetre
2Current density and 20-100 time second Treatment of Carbon, the bonding of it and Resins, epoxy is improved, the interlaminar shear strength of its unidirectional reinforced epoxy matrix material can reach 1130 kilograms per centimeter
2
Description
The present invention is the electro-deposition method that is used for surface treatment of carbon fibers.
Carbon fiber is the graphite crystal layer structure along the fiber axial orientation, and its surface-area is little, the low chemical mobility of the surface of surface energy is low.Therefore, when making matrix material with carbon-fibre reinforced epoxy resin, the bonding of carbon fiber and interlaminar resin is poor, and the interlaminar shear strength value that shows as matrix material is low, influences the use of matrix material.In order to improve the bonding of carbon fiber and interlaminar resin, people have proposed a series of carbon fiber surface treatment method.Oxidation style is arranged, comprise wet oxidation method, with the dry oxidation method and the electrolytic oxidation that utilizes electrochemical process of gaseous oxidizer with oxidizing agent solution.Coating is arranged, comprise that dip-coating is organic or macromolecular compound, vapour deposition carbon or silicon carbide layer, the growing silicon carbide whisker, use monomeric electropolymerization and use the electrodip process of polymkeric substance.The method that the plasma body that utilizes gas with various is arranged.The treatment effect of these methods has nothing in common with each other, and the shearing resistance of gained matrix material is in the 600-1100 kilograms per centimeter
2Between do not wait.It should be noted that and use oxidation style to need anticorrosion equipment and high temperature, and oxidation also can reduce the synnema intensity of fiber, the shock strength of matrix material decreases; The inorganic coating method often requires special reaction atmosphere and high temperature; Plasma method requires to produce the Special Equipment of plasma body.And wherein use the electrodip process of polymkeric substance that characteristics are arranged in addition.
Existing carbon fiber surface electrodip process (1,2), be to be immersed in the ammonium salt aqueous solution of carboxy-containing copolymer of vinyl monomer that amount of solid is 2.5-10% and maleic anhydride without any the surface-treated carbon fiber, wherein the molecular weight of styrene-maleic anhydride copolymer is 1600, the molecular weight of methyl vinyl ether-maleic acid copolymer is greater than 500000, voltage with the 10-50 volt, in 1-10 minute, aforementioned multipolymer is deposited on as on the anodic carbon fiber surface, used solvent wash again 5 minutes.Multipolymer has improved bonding between carbon fiber and Resins, epoxy in the galvanic deposit of carbon fiber surface.Interlaminar shear strength with the carbon fiber reinforced epoxy resin composite material through handling like this can reach 680 kilograms per centimeter
2, and shock strength does not reduce, even can also improve.Electrodip process does not damage carbon fiber, and the equipment of use is simple, and the deposit fluid toxicological harmless of employing is polluted, but at room temperature carries out and operate continuously.But the gained composite material strength is still undesirable, and one of its reason is to adopt voltage control can not reflect deposition process and the quantity notion thereof that occurs on the carbon fiber surface unit surface clearly.
The objective of the invention is to select the preferred molecular weight scope of carboxy-containing copolymer, select rational galvanic deposit parameter-current density to be controlled, make electrodeposition process to the shearing resistance of carbon-fibre reinforced epoxy resin composite material to improve effect more obvious.
Carboxy-containing copolymer with vinyl monomer and maleic anhydride, multipolymer as vinylbenzene and maleic anhydride, vinyl-acetic ester and maleic anhydride, methyl methacrylate and maleic anhydride etc., number-average molecular weight is made into the ammonium salt aqueous solution of solids content between 1.5-5.0% as electrodeposit liquid between 2000-6000.The negative ion of multipolymer will be to as the anodic carbon fiber sport under the effect of DC electric field, and under the fiber surface deposition, to form the homogeneous polymer layer.
Electric deposition device (seeing accompanying drawing) is made up of galvanic deposition cell 2 and D.C. regulated power supply 1.Stainless steel plate negative electrode 3 and the steel rider anode 5 that contacts with carbon fiber 4 are arranged in the sedimentation tank 2.Make guide wheel 6,7,8 with tetrafluoroethylene.Galvanic deposition cell 2 and rinse bath (not shown) are connected on the carbon fiber production line, can do to handle continuously carbon fiber surface.
Carbon fiber 4 pending, that surface cleaning does not have any coating as anode, is immersed in the above-mentioned deposit fluid 9, with the 0.3-1.0 milliampere/centimetre
2Current density depositing treatment 20-100 second.Then in solvent (acetone or water), washed 2-10 minute, again oven dry.
Make prepreg with the impregnated carbon fiber Resins, epoxy of handling by above-mentioned steps, by the condition of cure pressurization heating cure moulding of used Resins, epoxy-curative systems.The interlaminar shear strength of the matrix material that obtains (measuring with the short beam shear method) will reach the 800-1130 kilograms per centimeter
2, shock strength is than the improve 10% with untreatment fiber.
Embodiment 1:
With the monomer ratio is 1: 1, and molecular weight is that vinyl-acetic ester-maleic anhydride alternate copolymer content of 2500 is made electrodeposit liquid in 2.5% ammonium salt aqueous solution, with 0.5 milliampere/centimetre
2Depositing current density, it is 25000 kilograms per centimeter that 40 seconds electrodeposition time is handled synnema intensity continuously
2The carbon fiber of level.Washing back oven dry in acetone again.With 100 parts of 648 Resins, epoxy, the acetone soln of making solidifying agent with 5 parts of boron triflouride-mono aminoethanes floods the carbon fiber of electrodeposition process, and prepreg is made in oven dry.Hot repressing is shaped to unidirectional carbon fiber reinforced composite material, and its interlaminar shear strength is 820 kilograms per centimeter
2
Embodiment 2:
With the monomer ratio is 1: 1, and molecular weight is 4000 alternate styrene-maleic anhydride copolymer content in 2.0% ammonium salt aqueous solution is electrodeposit liquid, with 0.7 milliampere/centimetre
2Depositing current density, it is 25000 kilograms per centimeter that 30 seconds electrodeposition time is handled synnema intensity continuously
2The carbon fiber of level.Washing back oven dry in acetone again.With 100 parts of 648 Resins, epoxy.Make the carbon fiber of the acetone soln dipping electrodeposition process of solidifying agent with 5 parts of boron triflouride-mono aminoethanes.Prepreg is made in oven dry.Hot repressing is shaped to unidirectional carbon fiber reinforced composite material, and its interlaminar shear strength reaches 1130 kilograms per centimeter
2And the interlaminar shear strength of the matrix material of untreated carbon fiber is 650 kilograms per centimeter
2After electrodeposition process, the shock strength of matrix material is than untreated improve 10%.
Reference
（1）R.V.Subramanian，V.Sundaram and A.K.Patel，SPI Reinf.Plast.Composites Conf.（1978）20F.
（2）R.V.Subramanian，Pure Appl.Chem.，52，1927（1980）.
Claims (3)
1, a kind of electro-deposition method that is used for surface treatment of carbon fibers, its electrodeposit liquid is the ammonium salt aqueous solution of the carboxy-containing copolymer of vinyl monomer and maleic anhydride, the molecular weight that it is characterized in that multipolymer is 2000-6000, selects current density and electrodeposition time also to be controlled as the galvanic deposit parameter.
2, by the said electro-deposition method of claim 1, it is characterized in that control current density be the 0.3-1.0 milliampere/centimetre
2, electrodeposition time is 20-100 second.
3, by claim 1 and 2 said electro-deposition methods, the molecular weight that it is characterized in that multipolymer is 4000, and control current density is 0.7 milliampere/centimetre
2, electrodeposition time is 30 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85107069A CN85107069B (en) | 1985-09-27 | 1985-09-27 | Electro-deposit treatment of carbon fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85107069A CN85107069B (en) | 1985-09-27 | 1985-09-27 | Electro-deposit treatment of carbon fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107069A true CN85107069A (en) | 1986-07-02 |
| CN85107069B CN85107069B (en) | 1988-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85107069A Expired CN85107069B (en) | 1985-09-27 | 1985-09-27 | Electro-deposit treatment of carbon fiber |
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| Country | Link |
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| CN (1) | CN85107069B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102499793A (en) * | 2011-10-25 | 2012-06-20 | 大连创达技术交易市场有限公司 | Novel manufacturing method of carbon fiber rhinoplasty prosthesis |
| CN109265921A (en) * | 2018-08-14 | 2019-01-25 | 安徽和邦纺织科技有限公司 | A kind of surface modifying method of polymer fiber |
-
1985
- 1985-09-27 CN CN85107069A patent/CN85107069B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102499793A (en) * | 2011-10-25 | 2012-06-20 | 大连创达技术交易市场有限公司 | Novel manufacturing method of carbon fiber rhinoplasty prosthesis |
| CN102499793B (en) * | 2011-10-25 | 2015-08-19 | 陶健 | The manufacture method of novel carbon fiber nose augmentation prosthesis |
| CN109265921A (en) * | 2018-08-14 | 2019-01-25 | 安徽和邦纺织科技有限公司 | A kind of surface modifying method of polymer fiber |
| CN109265921B (en) * | 2018-08-14 | 2021-03-26 | 安徽和邦纺织科技有限公司 | Surface modification method of polymer fiber |
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| Publication number | Publication date |
|---|---|
| CN85107069B (en) | 1988-03-09 |
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