CN1487020A - Composite aramid fiber/polyimide material and its prepn - Google Patents
Composite aramid fiber/polyimide material and its prepn Download PDFInfo
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- CN1487020A CN1487020A CNA031416632A CN03141663A CN1487020A CN 1487020 A CN1487020 A CN 1487020A CN A031416632 A CNA031416632 A CN A031416632A CN 03141663 A CN03141663 A CN 03141663A CN 1487020 A CN1487020 A CN 1487020A
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Abstract
During the preparation of composite aramid fiber/polyimide material, aramid fiber is first surface modified via gamma-ray irradiation of dosage 300-500 kGy in nitrogen atmosphere to raise surface activity; the surface modified aramid fiber, additive polyimide powder, PTEF and graphite are then airflow crushed and mixed in an air flow crusher of air pressure 4-6 MPa; the mixture powder is hot pressing molded at 200-240 deg.c and 16-23 MPa for 0.5-1 hr. Thus prepared composite aramid fiber/polymide material has excellent mechanical performance and friction performance and may be used in the structural part and friction part in aeronautic and astronautic fields.
Description
Technical field:
The present invention relates to a kind of advanced composite material and preparation method thereof, relate in particular to a kind of aramid fiber/composite polyimide material and preparation method thereof, belong to technical field of new material preparation.
Background technology:
Polyimide is the organic polymer that contains imide group on the class main chain, has excellent advantages such as thermostability, high vacuum, anti-irradiation and low frictional wear.Polyimide is applied to as self-lubricating abrasion-proof material in the friction system in fields such as space flight, is subjected to the very big attention of national defense and military and sophisticated technology department day by day.Wherein, addition polyimide (API) has good processing characteristics and outstanding thermo-oxidative stability energy, but wear resisting property is poor when using separately, so, adding various fillers and make the composite polyimide material member in matrix, is one of its principal mode of using in tribological field.The character of filler, size and content influence the mechanical property and the tribological property of matrix material.When filler content was identical, bat wool was the most obvious to the improvement effect of matrix material tribological property.
Aramid fiber is a kind of high performance organic fibre, have not only that superelevation is strong, characteristics such as ultra high modulus, high temperature resistant and light specific gravity, but also have characteristics such as good shock resistance and fatigue performance, good dielectricity, chemical stability, low bulk, low heat conduction, therefore, aramid fiber can be used for strengthening polyimide, improves the mechanical property and the tribological property of matrix material.
CN1080298A discloses a kind of thermoplastic polyimide composite material and preparation method thereof, adopt in-situ polymerization to prepare continuous fibre and strengthen composite polyimide material, the polyimide that adopts is a thermoplasticity, the moulding more complicated, relatively be suitable for the production of composite board, and not too be fit to the load bearing structure spare or the friction member of production shape more complicated.
CN1339536A discloses a kind of short-cut fiber reinforced moleded polyimide plastic and preparation method thereof, the chopped strand that adopts is a kind of in carbon fiber, glass fibre, the graphite fibre, adopt two high temperature basement membrane single spreadings, add above-mentioned staple fibre at rubberised layer, remove basement membrane at last, obtain moulding compound.This method only is fit to make sheet material, and is thinner, and the moulding process more complicated, also is not suitable for making the member of shape more complicated.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, a kind of aramid fiber/composite polyimide material and preparation method thereof is provided, the technology simple possible, the material of preparation is suitable for structured material and friction materials, satisfies the performance requriements of Aeronautics and Astronautics department to composite material structural member and friction member.
For realizing such purpose, the present invention adopts the short raw materials such as aramid fiber, addition polyimide molding powder, tetrafluoroethylene and a spot of graphite of cutting, adopt dry type comminution by gas stream blend and hot press mold shaping technology, preparation aramid fiber/composite polyimide material.
Aramid fiber of the present invention/composite polyimide material raw material is formed weight percent:
Addition polyimide molding powder: 60～80%
Length is the short aramid fiber of cutting of 3～15mm: 15～30%
Tetrafluoroethylene: 2.5～10%
Graphite: 2.5～5%
Composite material and preparation method thereof of the present invention is specially: at first aramid fiber is carried out surface treatment to improve fiber surface activity, adopt gamma-radiation under nitrogen environment, aramid fiber to be carried out irradiation, irradiation dose is 300～500kGy, then will be through above-mentioned surface-treated aramid fiber, with addition polyimide molding powder, tetrafluoroethylene, graphite mixes, in micronizer mill, carry out the comminution by gas stream blend, the compressed air pressure of comminution by gas stream is 4～6MPa, pass through hot press mold shaping then, hot pressing temperature is 200 ℃～240 ℃, time is 0.5～1 hour, and pressure is 16～23MPa.
The aramid fiber that the present invention adopts comprises that the weak points such as Twaron series fiber, Muscovite Terlon fiber, APMOC series fiber, home-made Fanglun l414, F-12 of AKZO company of Kevlar series fiber, the Holland of du pont company cut aramid fiber.Polyimide is an addition polyimide molding powder, as: PMR-15, Kerimid etc.
When carrying out surface treatment to aramid fiber, the present invention also can adopt other surface treatment methods, as: Cement Composite Treated by Plasma, chemical graft etc.
Technology of the present invention is simple, the matrix material that makes has excellent mechanical property and tribological property, can be applied to the manufacturing of various bearings, gear, sealing member and load bearing structure spare, be particularly suitable for being applied to the composite material structural member and the friction member in Aeronautics and Astronautics field.
Embodiment:
Below by specific embodiment technical scheme of the present invention is further described.
Embodiment 1:
Preparation aramid fiber/composite polyimide material weight percentages of components is: the short aramid fiber (length is about 15mm) of cutting of F-12: 30%, and the PMR-15 polyimide molding powder: 65%, tetrafluoroethylene 2.5%, graphite 2.5%.
At first adopt gamma-radiation under nitrogen environment, aramid fiber to be carried out irradiation, irradiation dose is 300kGy, same then polyimide molding powder, tetrafluoroethylene, graphite carry out the comminution by gas stream blend in micronizer mill, compressed air pressure is 4MPa, pass through hot press mold shaping then, temperature is 200 ℃, and the time is 1 hour, and pressure is 23MPa.
Tensile strength according to GB1446-83 standard testing matrix material is 58.4MPa.
Embodiment 2
Tribological property for the test compound material, adjust the proportioning raw materials of matrix material, strengthen polytetrafluoroethyl-ne olefinic constituent and graphitic composition, weight percent is as follows: the short Kevlar fiber (about length 3mm) of cutting: 20%, PMR-15 polyimide molding powder: 70%, tetrafluoroethylene: 5%, graphite: 5%.
At first adopt gamma-radiation under nitrogen environment, aramid fiber to be carried out irradiation, irradiation dose is 400kGy, same then polyimide molding powder, tetrafluoroethylene, graphite carry out the comminution by gas stream blend in micronizer mill, compressed air pressure is 5MPa, pass through hot press mold shaping then, temperature is 220 ℃, and the time is 40 minutes, and pressure is 20MPa.
Make the bolt sample of Φ 5mm * 18mm composite polyimide material after the moulding through mechanical workout, test the tribological property of aircraft measurements material at No. three bolt disc types of Black Warrior high temperature friction and wear: its stable frictional coefficient is about 0.2, and wear rate is 1.2 * 10
-14m
3(Nm)
-1
Embodiment 3
The feed composition weight percent is: the short aramid fiber (length is about 10mm) of cutting of APMOC: 15%, and the PMR-15 polyimide molding powder: 80%, tetrafluoroethylene 2.5%, graphite 2.5%.
At first adopt gamma-radiation under nitrogen environment, aramid fiber to be carried out irradiation, irradiation dose is 500kGy, same then polyimide molding powder, tetrafluoroethylene, graphite carry out the comminution by gas stream blend in micronizer mill, compressed air pressure is 6MPa, pass through hot press mold shaping then, temperature is 240 ℃, and the time is 0.5 hour, and pressure is 16MPa.
Its flexural strength of GB1449-83 standard testing, result are 70.2Mpa.
Claims (2)
1, a kind of aramid fiber/composite polyimide material is characterized in that weight percentages of components is: length is the short aramid fiber of cutting of 3～15mm: 15～30%, and polyimide resin: 60～80%, tetrafluoroethylene: 2.5～10%, graphite: 2.5～5%.
2, the preparation method of aramid fiber/composite polyimide material as claimed in claim 1, it is characterized in that at first aramid fiber being carried out surface treatment to improve fiber surface activity, adopt gamma-radiation under nitrogen environment, aramid fiber to be carried out irradiation, irradiation dose is 300～500kGy, then will be through above-mentioned surface-treated aramid fiber, with polyimide molding powder, tetrafluoroethylene, graphite carries out the comminution by gas stream blend in micronizer mill, compressed air pressure is 4～6MPa, pass through hot press mold shaping then, hot pressing temperature is 200 ℃～240 ℃, time is 0.5～1 hour, and pressure is 16～23MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141663 CN1207340C (en) | 2003-07-17 | 2003-07-17 | Composite aramid fiber/polyimide material and its prepn |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141663 CN1207340C (en) | 2003-07-17 | 2003-07-17 | Composite aramid fiber/polyimide material and its prepn |
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| Publication Number | Publication Date |
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| CN1487020A true CN1487020A (en) | 2004-04-07 |
| CN1207340C CN1207340C (en) | 2005-06-22 |
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| CN 03141663 Expired - Fee Related CN1207340C (en) | 2003-07-17 | 2003-07-17 | Composite aramid fiber/polyimide material and its prepn |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328320C (en) * | 2005-05-20 | 2007-07-25 | 南京工业大学 | Thermoplastic polyimide-based air compressor sliding blade and preparation method thereof |
| CN100341942C (en) * | 2005-12-29 | 2007-10-10 | 上海交通大学 | Method for preparing poly(p-phenylene benzobisoxazole)/polyimide composite material |
| CN100408635C (en) * | 2005-08-02 | 2008-08-06 | 南京工业大学 | Crest welder chain claw and preparation method thereof |
| CN100500878C (en) * | 2005-09-16 | 2009-06-17 | 鸿富锦精密工业（深圳）有限公司 | Surface treatment process |
| CN102081999A (en) * | 2010-11-25 | 2011-06-01 | 苏州科宝光电科技有限公司 | Thermotolerant corrosion-resistant flexibility-resistant cable |
| CN102391645A (en) * | 2011-09-28 | 2012-03-28 | 洛阳轴研科技股份有限公司 | Preparation method for thermoplastic-polyimide-based compound material for bearing retainer |
| CN102863781A (en) * | 2012-09-25 | 2013-01-09 | 浙江吉利汽车研究院有限公司杭州分公司 | Fiber resin engine gasket and preparation method thereof |
| CN103170400A (en) * | 2013-04-03 | 2013-06-26 | 太仓金凯特种线缆有限公司 | Method for preparing PTFE (polytetrafluoroethene) ultrafine powder by combining ultraviolet rays with ozone and hydrogen peroxide |
| CN104629364A (en) * | 2013-11-12 | 2015-05-20 | 黑龙江鑫达企业集团有限公司 | Aramid fiber/polyimide composite material and preparation method thereof |
| CN105820567A (en) * | 2016-04-18 | 2016-08-03 | 南京航空航天大学 | Graphene-modified polyimide composite material and application thereof |
| CN107930830A (en) * | 2017-12-16 | 2018-04-20 | 江西正拓新能源科技股份有限公司 | A kind of artificial plumbago negative pole material production system |
| CN111916626A (en) * | 2020-07-10 | 2020-11-10 | 东莞东阳光科研发有限公司 | Cross-linked polyimide/aramid fiber composite diaphragm and preparation method thereof |
-
2003
- 2003-07-17 CN CN 03141663 patent/CN1207340C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328320C (en) * | 2005-05-20 | 2007-07-25 | 南京工业大学 | Thermoplastic polyimide-based air compressor sliding blade and preparation method thereof |
| CN100408635C (en) * | 2005-08-02 | 2008-08-06 | 南京工业大学 | Crest welder chain claw and preparation method thereof |
| CN100500878C (en) * | 2005-09-16 | 2009-06-17 | 鸿富锦精密工业（深圳）有限公司 | Surface treatment process |
| CN100341942C (en) * | 2005-12-29 | 2007-10-10 | 上海交通大学 | Method for preparing poly(p-phenylene benzobisoxazole)/polyimide composite material |
| CN102081999A (en) * | 2010-11-25 | 2011-06-01 | 苏州科宝光电科技有限公司 | Thermotolerant corrosion-resistant flexibility-resistant cable |
| CN102391645A (en) * | 2011-09-28 | 2012-03-28 | 洛阳轴研科技股份有限公司 | Preparation method for thermoplastic-polyimide-based compound material for bearing retainer |
| CN102863781A (en) * | 2012-09-25 | 2013-01-09 | 浙江吉利汽车研究院有限公司杭州分公司 | Fiber resin engine gasket and preparation method thereof |
| CN103170400B (en) * | 2013-04-03 | 2016-02-24 | 太仓金凯特种线缆有限公司 | The method of ultrafine PTFE powder prepared by ultraviolet combined with ozone and hydrogen peroxide |
| CN103170400A (en) * | 2013-04-03 | 2013-06-26 | 太仓金凯特种线缆有限公司 | Method for preparing PTFE (polytetrafluoroethene) ultrafine powder by combining ultraviolet rays with ozone and hydrogen peroxide |
| CN104629364A (en) * | 2013-11-12 | 2015-05-20 | 黑龙江鑫达企业集团有限公司 | Aramid fiber/polyimide composite material and preparation method thereof |
| CN105820567A (en) * | 2016-04-18 | 2016-08-03 | 南京航空航天大学 | Graphene-modified polyimide composite material and application thereof |
| CN105820567B (en) * | 2016-04-18 | 2018-07-17 | 南京航空航天大学 | A kind of graphene modified polyimide composite material and its application |
| CN107930830A (en) * | 2017-12-16 | 2018-04-20 | 江西正拓新能源科技股份有限公司 | A kind of artificial plumbago negative pole material production system |
| CN107930830B (en) * | 2017-12-16 | 2023-05-02 | 江西正拓新能源科技股份有限公司 | Artificial graphite negative electrode material production system |
| CN111916626A (en) * | 2020-07-10 | 2020-11-10 | 东莞东阳光科研发有限公司 | Cross-linked polyimide/aramid fiber composite diaphragm and preparation method thereof |
| CN111916626B (en) * | 2020-07-10 | 2023-04-28 | 东莞东阳光科研发有限公司 | Cross-linked polyimide/aramid composite diaphragm and preparation method thereof |
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| CN1207340C (en) | 2005-06-22 |
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