CN104233779A - Surface treatment method of carbon fibers - Google Patents
Surface treatment method of carbon fibers Download PDFInfo
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- CN104233779A CN104233779A CN201410508098.1A CN201410508098A CN104233779A CN 104233779 A CN104233779 A CN 104233779A CN 201410508098 A CN201410508098 A CN 201410508098A CN 104233779 A CN104233779 A CN 104233779A
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- surface treatment
- carbon fiber
- carbon fibers
- treatment method
- carbon
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Abstract
The invention discloses a surface treatment method of carbon fibers. The surface treatment method comprises the following steps: performing low-temperature plasma bombardment treatment on the carbon fibers to obtain carbon fibers subjected to surface treatment, and putting the carbon fibers subjected to the surface treatment into a plastic box for later use. The surface treatment method is high in surface treatment speed, high in efficiency and small in carbon fiber surface damage; the indexes of the tensile strength, the bending strength, the bending modulus and the charpy notched impact strength of the carbon fibers subjected to the surface treatment are all improved.
Description
Technical field
The present invention relates to a kind of Carbon Fiber Technology field, be specifically related to a kind of carbon fiber surface treatment method.
Background technology
Carbon fiber is the high strength and modulus fiber of phosphorus content more than 90%, is to use decomposition temperature lower than the fibre-forming polymer of melt temperature, is made by more than thousand degree solid phase pyrolysis.Its kind includes polyacrylonitrile-based carbon fibre (PAN base carbon is fine), asphalt base carbon fiber, viscose-based carbon fiber.The novel enhanced material that since the sixties, carbon fiber develops rapidly, the advantage such as have high strength, quality is light, endurance, function admirable, modulus are large and thermal coefficient of expansion is low, applies widely in field of compound material.But, carbon planes of molecules in fiber is along fiber axis orientation, surface is in chemical inertness, and affinity is poor between thermoplastic resin matrix, be difficult to formed chemical bond connect and there is incompatible component in interface, interface binding intensity is low, and compound tense easily forms hole and defect on interface, reinforcement and matrix resin are difficult to be formed with effective adhesive, affect the performance of composite material combination property.Therefore, improved the caking ability at reinforcement and matrix resin interface by surface treatment, to reach the object improving carbon fibre reinforced composite performance.
The effect of surface treatment of carbon fibers increases surface energy, strengthens weak boundary layer, thus improve the performances such as the wettability on surface; Produce and be suitable for bonding configuration of surface, make reinforcing material Surface Creation concavo-convex, improve interfacial adhesion by anchoring; Improve the affinity of resin and reinforcing material.Its surface treatment method has: oxidation processes, coating process, ray, laser, Cement Composite Treated by Plasma, glycerol polymerization surface treatment and other processing methods.
At present, general carbon fiber process is that at acidic liquid, (it is NH that acidic liquid comprises in employing at home
4nO
3, NH
4hCO
3, KNO
3, H
3pO
4, NaHCO
3, NH
4hCO
3nH
2cOONH
2, NH
4hCO
3/ NH
3h
2one or more in O) in, under the conditions such as certain temperature, electrolyte concentration, processing time, surface oxidation treatment is carried out to carbon fiber.But the method but complex operation, batch operation, and also public hazards are serious, in fact without industrial value.
Summary of the invention
For the deficiencies in the prior art, the invention provides one can improve carbon fiber surface activity, strengthens interlaminar shear strength, enhances productivity, and reduces the carbon fiber surface treatment method of production cost.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of carbon fiber surface treatment method, comprises the steps: at ambient temperature, carbon fiber is carried out low temperature plasma bombardment processing, obtain the carbon fiber after surface treatment, and it is stand-by to put into plastic box.
On the basis of technique scheme, above-mentioned 5 12K carbon fiber bundles are processed by low-temperature plasma treatment box with the speed of 2m/s.
Compared with prior art, beneficial effect of the present invention is:
Surface treatment speed of the present invention is fast, and efficiency is high, and carbon fiber surface surface damage is little, and the TENSILE STRENGTH of surface treated carbon fiber, bending strength, bending modulus and simply supported beam notch impact strength index all improve.
When carbon fiber bundle is by low-temperature plasma treatment facility, electronics in low temperature plasma obtains energy from electric field becomes high energy electron freely, excite molecule, atom, ion and the free radical that generate thus have higher chemical reactivity, the weak floor structure of carbon fiber surface can be removed, improve morphology, reduce the loss of carbon fiber tensile strength.Meanwhile, the energy of this high energy electron, lower than high-energy ray, only relates to material surface, does not affect the performance of matrix.
Detailed description of the invention
A kind of carbon fiber surface treatment method is as follows:
5 12K carbon fiber bundles are processed by low-temperature plasma treatment box with the speed of 2m/s, and it is stand-by to put into plastic box.
The technological parameter of above-mentioned low-temperature plasma treatment box when processing the surface of carbon fiber is as follows:
Carbon fibre tow speed of service 2m/s;
Carbon fiber processing environment temperature range-10 DEG C ~ 50 DEG C;
Gap between carbon fiber and plasma emission device is 5 ~ 30mm;
Surface treatment of carbon fibers ambient humidity 40 ~ 75%;
Surface treatment of carbon fibers power bracket 500 ~ 800W/ synnema;
Low temperature plasma surface treatment of carbon fibers temperature 30 DEG C ~ 100 DEG C.
For verifying the effect of surface treatment method of the present invention, performance contrast experiment is carried out to carbon fiber enhanced nylon composite, specific as follows:
(1) its ratio of carbon fiber enhanced nylon composite is prepared as follows:
Carbon fiber 25%
Nylon66 fiber matrix 70%
Anti-wear agent 3%
Other processing aid 2%
(2), by said ratio mixture; and by double-screw extruding pelletizing machine extruding pelletization at 145 DEG C ~ 190 DEG C temperature; and in extrusion, add carbon fiber by the charging aperture of centre, make the content of carbon fibre in composite material meet the requirements of index.
(3), process carbon fiber and untreated carbon fiber composite is respectively produced a collection of, and make performance test, as table 1;
As can be known from the above table, the TENSILE STRENGTH of surface treated carbon fiber, bending strength, bending modulus and simply supported beam notch impact strength index all improve.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in right of the present invention the change of the above embodiment, modification.
Claims (2)
1. a carbon fiber surface treatment method, is characterized in that, comprises the steps: at ambient temperature, and carbon fiber is carried out low temperature plasma bombardment processing, obtain the carbon fiber after surface treatment, and it is stand-by to put into plastic box.
2. a kind of carbon fiber surface treatment method as claimed in claim 1, is characterized in that: described 5 12K carbon fiber bundles are processed by low-temperature plasma treatment box with the speed of 2m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410508098.1A CN104233779A (en) | 2014-09-28 | 2014-09-28 | Surface treatment method of carbon fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410508098.1A CN104233779A (en) | 2014-09-28 | 2014-09-28 | Surface treatment method of carbon fibers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104233779A true CN104233779A (en) | 2014-12-24 |
Family
ID=52222624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410508098.1A Pending CN104233779A (en) | 2014-09-28 | 2014-09-28 | Surface treatment method of carbon fibers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104233779A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845289A (en) * | 2015-04-30 | 2015-08-19 | 上海锦湖日丽塑料有限公司 | High-performance carbon-fiber enhancement polymer alloy and preparation method thereof |
| CN106192360A (en) * | 2016-07-06 | 2016-12-07 | 绵阳高新区三阳塑胶有限责任公司 | A kind of carbon fiber surface quick compound hardening treatment method |
-
2014
- 2014-09-28 CN CN201410508098.1A patent/CN104233779A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845289A (en) * | 2015-04-30 | 2015-08-19 | 上海锦湖日丽塑料有限公司 | High-performance carbon-fiber enhancement polymer alloy and preparation method thereof |
| CN106192360A (en) * | 2016-07-06 | 2016-12-07 | 绵阳高新区三阳塑胶有限责任公司 | A kind of carbon fiber surface quick compound hardening treatment method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141224 |