CN113981672B - Rare earth oxide modified fiber fabric and preparation method and application thereof - Google Patents
Rare earth oxide modified fiber fabric and preparation method and application thereof Download PDFInfo
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- CN113981672B CN113981672B CN202111332855.0A CN202111332855A CN113981672B CN 113981672 B CN113981672 B CN 113981672B CN 202111332855 A CN202111332855 A CN 202111332855A CN 113981672 B CN113981672 B CN 113981672B
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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
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/45—Oxides or hydroxides of elements of Groups 3 or 13 of the Periodic System; Aluminates
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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
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/22—Polymers or copolymers of halogenated mono-olefins
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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
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/35—Abrasion, pilling or fibrillation resistance
Abstract
The invention provides a rare earth oxide modified fiber fabric and a preparation method and application thereof, and relates to the technical field of composite materials. The rare earth oxide modified fiber fabric provided by the invention comprises a polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric and rare earth oxide dispersed on the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric; the rare earth oxide is one or more of dysprosium oxide, samarium oxide and terbium oxide. The invention introduces the rare earth oxide into the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric, can improve the wear resistance of the fiber fabric, ensures that the fiber fabric still has lower friction coefficient and wear rate under the working conditions of low temperature and heavy load and high speed and high temperature, overcomes the defects of the existing fiber fabric composite material, and widens the application prospect.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a rare earth oxide modified fiber fabric and a preparation method and application thereof.
Background
The normal operation of the mechanical kinematic pair in a low-temperature environment puts very strict requirements on the lubricant, the lubricating task can not be almost completed only by the traditional lubricating grease, and the solid self-lubricating material breaks through the effective use limit of the traditional grease lubrication and has excellent performances of strong bearing capacity, excellent friction performance, high wear resistance, good timeliness and the like.
The fiber fabric composite material has unique self-lubricating property, so that the fiber fabric composite material is widely applied to friction parts such as aerospace, automobiles, sports equipment, bearings, sealing rings and the like. However, the wear resistance of the existing fiber fabric composite material under the conditions of low temperature or high speed and high temperature is sharply reduced, and the working conditions of increasing complexity and causticity are difficult to meet.
Disclosure of Invention
The invention aims to provide a rare earth oxide modified fiber fabric and a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a rare earth oxide modified fiber fabric, which comprises a polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric and rare earth oxides dispersed on the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric; the rare earth oxide is one or more of dysprosium oxide, samarium oxide and terbium oxide.
Preferably, the rare earth oxide is bonded to the polyetheretherketone-polytetrafluoroethylene blend fabric by polyetherimide.
Preferably, the diameter of the dysprosium oxide is 5-15 μm, and the specific surface area is 10-25 m 2 /g。
Preferably, the rare earth oxide is samarium oxide and terbium oxide.
Preferably, the average particle diameter of the samarium oxide is 20-40 nm, and the specific surface area is 30-50 m 2 (ii)/g; the average particle size of the terbium oxide is 70-90 nm, and the specific surface area is 1-5 m 2 /g。
Preferably, the mass of the rare earth oxide is 0.5-2.5% of the total mass of the rare earth oxide modified fiber fabric.
Preferably, the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric is woven in a plain weave structure, and the areal density is 400-440 g/cm 2 。
The invention provides a preparation method of the rare earth oxide modified fiber fabric, which comprises the following steps:
mixing polyetherimide, N-dimethylformamide and rare earth oxide to obtain impregnation liquid;
and (3) soaking the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric in the soaking solution, and drying to obtain the rare earth oxide modified fiber fabric.
Preferably, the mass ratio of the polyetherimide to the N, N-dimethylformamide to the rare earth oxide is (10-30) to (70-80) to (0.2-0.8).
The invention provides the application of the rare earth oxide modified fiber fabric or the rare earth oxide modified fiber fabric prepared by the preparation method in the technical scheme in a self-lubricating material.
The invention provides a rare earth oxide modified fiber fabric, which comprises a polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric and rare earth oxides dispersed on the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric; the rare earth oxide is one or more of dysprosium oxide, samarium oxide and terbium oxide. The invention introduces the rare earth oxide into the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric, can improve the wear resistance of the fiber fabric, ensures that the fiber fabric still has lower friction coefficient and wear rate under the working conditions of low temperature and heavy load and high speed and high temperature, overcomes the defects of the existing fiber fabric composite material, and widens the application prospect.
Drawings
FIG. 1 is a surface topography of dysprosium oxide;
FIG. 2 is a surface topography of samarium oxide;
FIG. 3 is a surface topography of terbium oxide.
Detailed Description
The invention provides a rare earth oxide modified fiber fabric, which comprises a polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric and rare earth oxides dispersed on the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric; the rare earth oxide is one or more of dysprosium oxide, samarium oxide and terbium oxide.
The rare earth oxide modified fiber fabric provided by the invention comprises a polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric (PEEK-PTFE blended fiber fabric). In the invention, the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric is preferably woven by PTFE fibers and polyether-ether-ketone fibers in a plain weave structure; the mass ratio of the PTFE fiber to the polyether-ether-ketone fiber is preferably (5-7): (3-5), more preferably 3:2. In the present invention, the diameter of the polyetheretherketone fiber is preferably 50 to 55 μm; the diameter of the PTFE fiber is preferably 20 to 25 μm.
In the invention, the surface density of the PEEK-PTFE blended fiber fabric is preferably 400-440 g/cm 2 More preferably 420g/cm 2 。
In the invention, the Polyetheretherketone (PEEK) is a special engineering plastic with ultrahigh performance, has good fracture toughness and thermal stability, excellent wear resistance, chemical corrosion resistance, flame retardant property and the like, can be used for a long time at the temperature of 250 ℃, is prepared from polyetheretherketone resin through high-temperature melt spinning, has the advantages of the PEEK resin and also has higher tensile strength and modulus. The molecular chains of Polytetrafluoroethylene (PTFE) are easy to slip, so that the Polytetrafluoroethylene (PTFE) has the characteristics of low friction and excellent self-lubricating property. The PEEK-PTFE blended fiber fabric has good self-lubricating property and wear resistance.
The rare earth oxide modified fiber fabric provided by the invention comprises rare earth oxide dispersed on the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric. In the invention, the rare earth oxide is one or more of dysprosium oxide, samarium oxide and terbium oxide, and is more preferably dysprosium oxide or a mixture of samarium oxide and terbium oxide. In the invention, dysprosium oxide has unique porous shape, and the dysprosium oxide is introduced into the PEEK-PTFE blended fiber fabric, so that the dysprosium oxide still has excellent friction performance and wear resistance under the working condition of low temperature and heavy load.
According to the invention, the friction and wear properties of the fiber fabric are modified by the cooperation of samarium oxide and terbium oxide, the effect of 1+1>2 can be generated when the samarium oxide and terbium oxide are used simultaneously, the problem of poor wear resistance of the fiber fabric composite material at high speed and high temperature is solved by the cooperation of the samarium oxide and terbium oxide, and the fiber fabric composite material is suitable for working conditions of high speed and high temperature.
In the present invention, the dysprosium oxide preferably has a particle diameter of 5 to 15 μm and a specific surface area of 10 to 25m 2 G, more preferably 20m 2 (ii) in terms of/g. In the present invention, the dysprosium oxide is porous.
In the present invention, the samarium oxide preferably has an average particle diameter of 20 to 40nm and a specific surface area of 30 to 50m 2 (iv) g; the average particle size of the terbium oxide is preferably 70 to 90nm.
In the present invention, the mass of the rare earth oxide is preferably 0.5 to 2.5%, more preferably 0.5 to 1.5%, of the total mass of the rare earth oxide-modified fiber fabric. In the present invention, when the rare earth oxide is dysprosium oxide, the mass of the dysprosium oxide is preferably 0.5 to 2%, more preferably 0.5 to 1%, of the total mass of the rare earth oxide-modified fiber fabric. In the invention, when the rare earth oxide is samarium oxide and terbium oxide, the mass of the samarium oxide is preferably 0.5-2.5%, more preferably 0.5-1.5% of the total mass of the rare earth oxide modified fiber fabric; the mass of the terbium oxide is preferably 0.5-2.5%, and more preferably 0.5-1.5% of the total mass of the rare earth oxide modified fiber fabric.
In the present invention, the rare earth oxide is preferably bonded to the polyetheretherketone-polytetrafluoroethylene blended fiber fabric by polyetherimide. In the present invention, the mass of the polyetherimide is preferably 5 to 40%, more preferably 20 to 40%, of the total mass of the blend fiber fabric composite. The invention also provides a preparation method of the rare earth oxide modified fiber fabric, which comprises the following steps:
mixing polyetherimide, N-dimethylformamide and rare earth oxide to obtain impregnation liquid;
and (3) soaking the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric in the soaking solution, and drying to obtain the rare earth oxide modified fiber fabric.
The method comprises the step of mixing Polyetherimide (PEI), N-Dimethylformamide (DMF) and rare earth oxide to obtain an impregnation liquid. In the invention, the mass ratio of the PEI, the DMF and the rare earth oxide is preferably (10-30) to (70-80) to (0.2-0.8). In the invention, when the rare earth oxide is dysprosium oxide, the mass ratio of the PEI, the DMF and the dysprosium oxide is preferably (10-30): 75-80): 0.2-0.4, more preferably (20-30): 78-80): 0.2-0.4. Dysprosium oxide used in the invention is porous and can be fully contacted with Polyetherimide (PEI) impregnation liquid, so that the interface bonding strength is improved; the good interface bonding strength can better transfer stress, improve the bearing capacity of the fiber fabric, improve the wear resistance and prolong the service life.
In the invention, when the rare earth oxide is samarium oxide and terbium oxide, the mass ratio of the PEI, the DMF, the samarium oxide and the terbium oxide is preferably (10-30) to (70-80) to (0.2-0.4), more preferably (20-30) to (75-80) to (0.3-0.4).
In the present invention, the mixing is preferably performed under stirring conditions, and the stirring rate is preferably 1000 to 1500rpm, more preferably 1200 to 1400rpm; the stirring time is preferably 2 to 3 hours, more preferably 2.5 hours.
After the impregnation liquid is obtained, the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric is placed in the impregnation liquid for impregnation, and the rare earth oxide modified fiber fabric is obtained after drying. In the present invention, the temperature of the impregnation is preferably room temperature. In the present invention, the time for each impregnation is preferably 15min. In the invention, the drying temperature is preferably 90-110 ℃, and more preferably 100 ℃; the time is preferably 2h. In the present invention, the drying is preferably performed in a vacuum oven. In the invention, the impregnation and drying processes are preferably repeated on the dried fabric to obtain the rare earth oxide modified fiber fabric. In the present invention, the number of times of repetition of the dipping and drying process is preferably 2 to 5 times.
In the invention, the mass of the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric is preferably 60 to 90 percent of the total mass of the rare earth oxide modified fiber fabric, and more preferably 70 to 80 percent.
In the invention, the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric preferably further comprises pretreatment before impregnation. In the present invention, the method of pretreatment preferably comprises: sequentially washing the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric with petroleum ether, washing with acetone-ethanol and drying. In the present invention, the petroleum ether washing is preferably performed under ultrasonic conditions; the time for the petroleum ether washing is preferably 25 to 35min, more preferably 30min. In the invention, the petroleum ether is preferably washed, dried and then washed by acetone-ethanol. In the invention, the cleaning solution used for acetone-ethanol washing is a mixed solution of acetone and ethanol; the volume ratio of acetone to ethanol in the cleaning solution is preferably (1-3): (1-2); the time for the acetone-ethanol washing is preferably 25 to 35min, and more preferably 30min. In the present invention, the drying temperature is preferably 50 to 80 ℃, more preferably 60 to 75 ℃; the drying time is preferably 1 to 3 hours, more preferably 1.5 to 2 hours. The invention can remove the sizing material and the oiling agent which are stuck on the fiber in the spinning process of the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric through pretreatment.
The invention also provides the application of the rare earth oxide modified fiber fabric or the rare earth oxide modified fiber fabric prepared by the preparation method in the technical scheme in a self-lubricating material. In the invention, the rare earth oxide modified fiber fabric is preferably applied to a self-lubricating material as a self-lubricating coating, and is more preferably used as a bearing self-lubricating bushing. In a specific embodiment of the invention, the titanium oxide nanowire and molybdenum oxide nanowire synergistic modified fiber fabric composite material is adhered to the surface of a bearing through phenolic resin and is used as a self-lubricating bushing of the bearing. In the invention, the thickness of the titanium oxide nanowire and molybdenum oxide nanowire synergistically modified fiber fabric composite material is preferably 0.4-0.7 mm, and more preferably 0.6mm.
In the invention, when the modified material of the rare earth oxide modified fiber fabric is dysprosium oxide, a self-lubricating material suitable for a low-temperature heavy-load working condition is preferably selected; the temperature of the low-temperature heavy-load working condition is preferably-150 ℃; the load is preferably 32MPa. In the invention, when the modified material of the rare earth oxide modified fiber fabric is samarium oxide and terbium oxide, a self-lubricating material suitable for high-speed and high-temperature working conditions is preferably selected; the speed of the high-speed high-temperature working condition is preferably 5m/s; the temperature is preferably 150 ℃.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The following examples and comparative examples employ the starting materials:
PEEK-PTFE blend fiber fabric: provided by the institute of textile science of Shaanxi province; the surface density is 420g/cm 2 ；
PTFE fiber: changzhou Mo Rong new materials science and technology, inc.;
PEEK fiber: changzhou creative new materials science and technology Limited;
polyetherimide (PEI): provided by Shanghai institute of synthetic resins;
dysprosium oxide: beijing Deke island gold Tech Co., ltd., as shown in FIG. 1, the average particle diameter was 10 μm and the specific surface area was 20m 2 /g；
N, N-Dimethylformamide (DMF): li Anlong Bohua (Tianjin) pharmaceutical chemistry, inc.;
petroleum ether: li Anlong Bohua (Tianjin) pharmaceutical chemistry, inc.;
phenolic resin: the phenolic resin adhesive of the iron anchor plate 204 produced by Shanghai New photo-chemical company Limited is adopted.
Samarium oxide: as shown in FIG. 2, samarium oxide having an average particle diameter of 30nm and a specific surface area of 45m was prepared by Beijing Deke island gold Tech Co., ltd 2 /g；
Terbium oxide: as shown in FIG. 3, the average particle diameter of the particles is 70 to 90nm.
Example 1
And (3) putting the PEEK-PTFE blended fiber fabric into petroleum ether for ultrasonic cleaning for 30min, and after drying, putting acetone: ultrasonically cleaning the mixed solution with the volume ratio of ethanol 1:1 for 30min, taking out the mixed solution, and drying the mixed solution at 50 ℃ for 1h to obtain the pretreated PEEK-PTFE blended fiber fabric;
mixing PEI, DMF and dysprosium oxide according to a mass ratio of 10;
and (3) soaking the pretreated PEEK-PTFE blended fiber fabric in the soaking solution, drying in a vacuum oven at 90 ℃, and repeating the operations of soaking and drying until the mass of the PEEK-PTFE blended fiber fabric accounts for 90% of the total mass of the composite material to obtain the rare earth oxide modified fiber fabric.
Example 2
And (3) putting the PEEK-PTFE blended fiber fabric into petroleum ether for ultrasonic cleaning for 35min, and after drying, putting acetone: ultrasonically cleaning the mixed solution with the volume ratio of ethanol of 3:2 for 35min, taking out the mixed solution, and drying the mixed solution at 80 ℃ for 2h to obtain the pretreated PEEK-PTFE blended fiber fabric;
mixing PEI, DMF and dysprosium oxide according to a mass ratio of 30;
and (3) soaking the pretreated PEEK-PTFE blended fiber fabric in the soaking solution, drying in a vacuum oven at 110 ℃, and repeating the operations of soaking and drying until the mass of the PEEK-PTFE blended fiber fabric accounts for 60% of the total mass of the composite material to obtain the rare earth oxide modified fiber fabric.
Example 3
And (3) putting the PEEK-PTFE blended fiber fabric into petroleum ether for ultrasonic cleaning for 25min, and after drying, putting acetone: ultrasonically cleaning the mixed solution with the volume ratio of the ethanol of 2:1 for 35min, taking out the mixed solution, and drying the mixed solution at 70 ℃ for 1.5h to obtain the preprocessed PEEK-PTFE blended fiber fabric;
mixing PEI, DMF and dysprosium oxide according to a mass ratio of 20;
and (3) soaking the pretreated PEEK-PTFE blended fiber fabric in the soaking solution, drying in a vacuum oven at 100 ℃, and repeating the operations of soaking and drying until the mass of the PEEK-PTFE blended fiber fabric accounts for 70% of the total mass of the composite material to obtain the rare earth oxide modified fiber fabric.
Example 4
And (3) putting the PEEK-PTFE blended fiber fabric into petroleum ether for ultrasonic cleaning for 25min, drying, and then putting acetone: ultrasonically cleaning the mixed solution with the volume ratio of ethanol of 3:2 for 35min, taking out the mixed solution, and drying the mixed solution at 60 ℃ for 2h to obtain the pretreated PEEK-PTFE blended fiber fabric;
mixing PEI, DMF and dysprosium oxide according to a mass ratio of 30;
and (3) soaking the pretreated PEEK-PTFE blended fiber fabric in the soaking solution, drying in a vacuum oven at 90 ℃, and repeating the operations of soaking and drying until the mass of the PEEK-PTFE blended fiber fabric accounts for 80% of the total mass of the composite material to obtain the rare earth oxide modified fiber fabric.
Comparative example 1
Substantially the same as in example 2, except that the mass ratio of PEI, DMF and dysprosium oxide was adjusted from "30.4" to "30.4.
Test example 1
Bonding the rare earth oxide modified fiber fabrics of examples 1-4 and comparative example 1 to GCr15 stainless steel for friction test by using phenolic resin, and curing to obtain a friction block for test; the curing procedure was: 0.1MPa, raising the temperature to 160 ℃ by a program of 5 ℃/min and then preserving the temperature for 2h. Frictional wear test conditions: the friction and wear test adopts a high-vacuum low-temperature friction and wear testing machine, the friction block for test and the GCr15 steel ring are oppositely ground, the test load is 32MPa (1200N), the rotating speed is 2cm/s, the running time is 2h, the friction coefficient and the wear rate are average values of 3-5 tests, and the test temperature is-150 ℃. The results are shown in Table 1.
TABLE 1 Friction and abrasion Properties of rare earth oxide-modified fiber fabrics of examples 1 to 4 and comparative example 1
| Item | Coefficient of friction | Wear rate/10 -14 m 3 ·N -1 ·m -1 |
| Example 1 | 0.148 | 5.1 |
| Example 2 | 0.133 | 2.8 |
| Example 3 | 0.159 | 7.2 |
| Example 4 | 0.143 | 4.3 |
| Comparative example 1 | 0.192 | 18.3 |
As can be seen from Table 1, the coefficient of friction and the wear rate of the fiber fabric composite began to decrease after the addition of dysprosium oxide. However, different amounts of dysprosium oxide improve tribological properties to varying degrees. In addition, it is clear from example 2 and comparative example 1 that dysprosium oxide can greatly improve the tribological properties of the fiber fabric composite.
Example 5
And (3) putting the PEEK-PTFE blended fiber fabric into petroleum ether for ultrasonic cleaning for 30min, and after drying, putting acetone: ultrasonically cleaning the mixed solution with the volume ratio of the ethanol of 1:1 for 30min, taking out the mixed solution and drying the mixed solution at 70 ℃ for 1.5h to obtain the preprocessed PEEK-PTFE blended fiber fabric;
mixing PEI, DMF, samarium oxide and terbium oxide according to a mass ratio of 20;
and (3) soaking the pretreated PEEK-PTFE blended fiber fabric in the soaking solution, drying in a vacuum oven at 100 ℃, and repeating the operations of soaking and drying until the mass of the PEEK-PTFE blended fiber fabric accounts for 70% of the total mass of the composite material to obtain the rare earth oxide modified fiber fabric.
Example 6
And (3) putting the PEEK-PTFE blended fiber fabric into petroleum ether for ultrasonic cleaning for 35min, and after drying, putting acetone: ultrasonically cleaning the mixed solution with the volume ratio of the ethanol of 3:2 for 35min, taking out the mixed solution, and drying the mixed solution at 80 ℃ for 2h to obtain the preprocessed PEEK-PTFE blended fiber fabric;
mixing PEI, DMF, samarium oxide and terbium oxide according to a mass ratio of 30.4;
and (3) soaking the pretreated PEEK-PTFE blended fiber fabric in the soaking solution, drying in a vacuum oven at 110 ℃, and repeating the operations of soaking and drying until the mass of the PEEK-PTFE blended fiber fabric accounts for 60% of the total mass of the composite material to obtain the rare earth oxide modified fiber fabric.
Example 7
And (3) putting the PEEK-PTFE blended fiber fabric into petroleum ether for ultrasonic cleaning for 25min, drying, and then putting acetone: ultrasonically cleaning the mixed solution with the volume ratio of ethanol of 1:1 for 25min, taking out the mixed solution, and drying the mixed solution at 50 ℃ for 1h to obtain the pretreated PEEK-PTFE blended fiber fabric;
mixing PEI, DMF, samarium oxide and terbium oxide according to a mass ratio of 10;
and (3) soaking the pretreated PEEK-PTFE blended fiber fabric in the soaking solution, drying in a vacuum oven at 90 ℃, and repeating the operations of soaking and drying until the mass of the PEEK-PTFE blended fiber fabric accounts for 90% of the total mass of the composite material to obtain the rare earth oxide modified fiber fabric.
Example 8
And (3) putting the PEEK-PTFE blended fiber fabric into petroleum ether for ultrasonic cleaning for 25min, drying, and then putting acetone: ultrasonically cleaning the mixed solution with the volume ratio of ethanol of 3:1 for 35min, taking out the mixed solution, and drying the mixed solution at 70 ℃ for 2h to obtain the pretreated PEEK-PTFE blended fiber fabric;
mixing PEI, DMF, samarium oxide and terbium oxide according to a mass ratio of 10.3;
and (3) soaking the pretreated PEEK-PTFE blended fiber fabric in the soaking solution, drying in a vacuum oven at 95 ℃, and repeating the operations of soaking and drying until the mass of the PEEK-PTFE blended fiber fabric accounts for 80% of the total mass of the composite material to obtain the rare earth oxide modified fiber fabric.
Comparative example 2
Substantially the same as in example 6, except that the mass ratio of PEI, DMF, samarium oxide and terbium oxide was adjusted from "30.
Comparative example 3
Substantially the same as in example 6, except that the mass ratio of PEI, DMF, samarium oxide and terbium oxide was adjusted from "30.
Comparative example 4
Substantially the same as in example 6, except that the mass ratio of PEI, DMF, samarium oxide and terbium oxide was adjusted from "30.4.
Test example 2
Bonding the rare earth oxide modified fiber fabrics prepared in the examples 5-8 and the comparative examples 2-4 to GCr15 bearing steel for a friction test by using phenolic resin, and curing to obtain a friction block for the test; the curing procedure was: 0.2MPa, raising the temperature to 170 ℃ by a program of 8 ℃/min and then preserving the temperature for 2h. Friction and wear test conditions: a high-speed ring block friction and wear testing machine is adopted, the friction block for testing and the GCr15 steel ring are oppositely ground, the test load is 0.5MPa (50N), the rotating speed is 5m/s, the running time is 2h, the friction coefficient and the wear rate are average values of 3-5 tests, and the test temperature is 150 ℃. The results are shown in Table 2.
TABLE 2 Friction and abrasion Properties of rare earth oxide-modified fiber fabrics of examples 5 to 8 and comparative examples 2 to 4
| Item | Coefficient of friction | Wear rate/10 -14 m 3 ·N -1 ·m -1 |
| Example 5 | 0.187 | 9.7 |
| Example 6 | 0.182 | 4.6 |
| Example 7 | 0.192 | 13.7 |
| Example 8 | 0.190 | 11.5 |
| Comparative example 2 | 0.215 | 17.2 |
| Comparative example 3 | 0.209 | 15.9 |
| Comparative example 4 | 0.227 | 20.4 |
As can be seen from Table 2, the samarium oxide and the terbium oxide can be used independently or together to improve the tribological property of the fiber fabric composite material, but the two materials can generate synergistic response to generate the effect of 1+1 >. The two rare earth oxides mainly have the function of improving the wear resistance of the fiber plant composite material under the heavy-load low-temperature working condition.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The rare earth oxide modified fiber fabric is characterized by comprising a polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric and rare earth oxide dispersed on the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric; the rare earth oxide is a mixture of samarium oxide and terbium oxide;
the rare earth oxide is bonded to the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric through polyetherimide.
2. The rare earth oxide modified fiber fabric of claim 1, wherein the samarium oxide has an average particle diameter of 20 to 40nm and a specific surface area of 30 to 50m 2 (iv) g; the average particle size of the terbium oxide is 70-90nm, and the specific surface area is 1-5m 2 /g。
3. The rare earth oxide modified fiber fabric as claimed in claim 1, wherein the mass of the rare earth oxide is 0.5-2.5% of the total mass of the rare earth oxide modified fiber fabric.
4. The rare earth oxide according to claim 1The modified fiber fabric is characterized in that the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric is woven in a plain weave structure, and the areal density is 400-440g/cm 2 。
5. The method of making the rare earth oxide modified fiber fabric of any one of claims 1~4 comprising the steps of:
mixing polyetherimide, N-dimethylformamide and rare earth oxide to obtain impregnation liquid;
and (3) soaking the polyether-ether-ketone-polytetrafluoroethylene blended fiber fabric in the soaking solution, and drying to obtain the rare earth oxide modified fiber fabric.
6. The preparation method according to claim 5, wherein the mass ratio of the polyetherimide to the N, N-dimethylformamide to the rare earth oxide is (10 to 30): (70 to 80): (0.2 to 0.8).
7. Use of the rare earth oxide modified fiber fabric of any one of claims 1~4 or the rare earth oxide modified fiber fabric prepared by the preparation method of any one of claims 5~6 in self-lubricating materials.
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| US9914152B2 (en) * | 2013-07-05 | 2018-03-13 | Surftec, Llc | Polytetrafluoroethylene thin film with polydopamine adhesive layer |
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