CN115807330A - Self-lubricating fiber fabric and self-lubricating liner fabric composite material and preparation method thereof - Google Patents
Self-lubricating fiber fabric and self-lubricating liner fabric composite material and preparation method thereof Download PDFInfo
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- CN115807330A CN115807330A CN202210018996.3A CN202210018996A CN115807330A CN 115807330 A CN115807330 A CN 115807330A CN 202210018996 A CN202210018996 A CN 202210018996A CN 115807330 A CN115807330 A CN 115807330A
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- 239000000835 fiber Substances 0.000 title claims abstract description 181
- 239000002131 composite material Substances 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 229910000000 metal hydroxide Inorganic materials 0.000 claims abstract description 34
- 150000004692 metal hydroxides Chemical class 0.000 claims abstract description 34
- 238000005530 etching Methods 0.000 claims abstract description 30
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 25
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
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- 238000006116 polymerization reaction Methods 0.000 claims abstract description 14
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- 239000002184 metal Substances 0.000 claims description 51
- 150000003839 salts Chemical class 0.000 claims description 41
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- 238000009832 plasma treatment Methods 0.000 claims description 19
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 229910000077 silane Inorganic materials 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 12
- 238000004132 cross linking Methods 0.000 claims description 11
- 150000002894 organic compounds Chemical class 0.000 claims description 11
- -1 transition metal salt Chemical class 0.000 claims description 10
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 8
- 239000005011 phenolic resin Substances 0.000 claims description 8
- 229920001568 phenolic resin Polymers 0.000 claims description 8
- 238000011068 loading method Methods 0.000 claims description 7
- 239000002243 precursor Substances 0.000 claims description 6
- 229910052723 transition metal Inorganic materials 0.000 claims description 6
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- 125000006850 spacer group Chemical group 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 238000003541 multi-stage reaction Methods 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000009719 polyimide resin Substances 0.000 claims description 4
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical class [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 3
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical class [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000007598 dipping method Methods 0.000 claims 1
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- 229910021641 deionized water Inorganic materials 0.000 description 8
- 238000002791 soaking Methods 0.000 description 7
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 description 6
- 230000003592 biomimetic effect Effects 0.000 description 6
- 125000000524 functional group Chemical group 0.000 description 6
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 5
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- GFHNAMRJFCEERV-UHFFFAOYSA-L cobalt chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Co+2] GFHNAMRJFCEERV-UHFFFAOYSA-L 0.000 description 4
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- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- QMKYBPDZANOJGF-UHFFFAOYSA-N benzene-1,3,5-tricarboxylic acid Chemical compound OC(=O)C1=CC(C(O)=O)=CC(C(O)=O)=C1 QMKYBPDZANOJGF-UHFFFAOYSA-N 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 1
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- HOEJXJMZXGNCBJ-UHFFFAOYSA-N ethene 4-ethenylbenzoic acid Chemical group C=CC1=CC=C(C=C1)C(=O)O.C=C HOEJXJMZXGNCBJ-UHFFFAOYSA-N 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
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- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention belongs to the field of composite materials and the technical field of lubricating materials, and provides a self-lubricating fiber fabric and a preparation method thereof, and a self-lubricating liner fabric composite material and a preparation method thereof. The preparation method provided by the invention constructs lamellar metal hydroxide which is distributed in a way of being vertical to the axial direction of the fiber on the surface of the fiber through an interface growth reaction and an etching treatment process and is used as a reinforcing component in an interface phase; and then modifying the copolymer between the metal hydroxide sheet layers through polymerization reaction of dopamine, polyethyleneimine and a silane coupling agent in the composite solution, and taking the polymer as a toughening component in an interface phase through interaction of hydrogen bonds and van der Waals acting force with the metal hydroxide. When the self-lubricating liner fabric composite material is prepared by compounding the self-lubricating fiber fabric and the resin, which are obtained by the preparation method, a strong-toughness integrated interface phase can be constructed in the self-lubricating liner fabric composite material, and the service life of the self-lubricating liner fabric composite material is prolonged.
Description
Technical Field
The invention relates to the field of composite materials and the technical field of lubricating materials, in particular to a self-lubricating fiber fabric and a preparation method thereof, and a self-lubricating liner fabric composite material and a preparation method thereof.
Background
The bearing is used as a key device in the industrial field, and has the main functions of supporting a mechanical rotating body, reducing the friction coefficient in the movement process of the mechanical rotating body and ensuring the rotation precision. The self-lubricating joint bearing is used as an important functional component with high bearing capacity, wear resistance, self-aligning, rotation and the like, is widely applied in the fields of aviation, aerospace, advanced weapon systems and high-end civil use, and becomes an indispensable component for parts such as an aircraft engine, an undercarriage, a rudder, a horizontal tail, a flap and the like. The self-lubricating liner is an important component in the self-lubricating oscillating bearing, and can play roles in antifriction, wear resistance, metal isolation, impact resistance, service life extension of the bearing and the like. The self-lubricating liner also has the advantages of high strength, no maintenance and the like, and shows excellent self-lubricating performance and wear resistance in harsh service environments such as high temperature, heavy load, high frequency and the like. Along with the higher and higher requirements of the high and new technical field on the performance of the bearing, the higher and higher requirements on the comprehensive performance of the self-lubricating liner are provided.
For the self-lubricating liner fabric composite material, the reinforcement is a two-dimensional fabric obtained by co-weaving reinforcing fibers and lubricating fibers (PTFE), and the interface between the fibers and resin in the whole composite material has a decisive influence on the performance of the composite material. The interface between the fiber and the resin shows very good bonding strength, and the internal stress of the material can be released only through the continuous generation and expansion of microcracks at the interface of the fiber and the resin; the interface bonding strength is too poor, and the mechanical strength and the tribological performance of the composite material can be greatly reduced. Therefore, an interface modification layer with matched strength and toughness needs to be constructed between fiber resins, so that the mechanical property and the tribological property of the self-lubricating liner fabric composite material are improved to the maximum extent.
At present, methods such as chemical etching, surface coating, high-molecular polymer grafting and the like are mainly adopted for modifying the self-lubricating liner fabric composite material, the self-lubricating liner fabric composite material prepared by the method can achieve the purpose of improving the bonding strength of a fiber-resin interface, and the interfacial toughness of the fiber-resin is not considered.
Disclosure of Invention
In view of the above, the present invention aims to provide a self-lubricating fiber fabric and a preparation method thereof, a self-lubricating liner fabric composite material and a preparation method thereof. The self-lubricating fiber fabric prepared by the preparation method provided by the invention not only can enhance the bonding strength of the fiber-resin, but also can improve the interface toughness of the fiber-resin.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a self-lubricating fiber fabric, which comprises the following steps:
carrying out plasma treatment on the fiber fabric to obtain an activated fiber fabric;
growing a metal organic framework compound on the surface of the activated fiber fabric to obtain a fiber fabric modified by the metal organic framework compound;
immersing the fiber fabric modified by the metal organic framework compound into an etching solution for etching treatment to obtain a fiber fabric loaded by metal hydroxide; the etching solution is a metal salt ethanol solution; the metal salt in the metal salt ethanol solution is consistent with the metal salt in the metal organic framework compound precursor solution;
and immersing the metal hydroxide-loaded fiber fabric into a dopamine-silane coupling agent-polyethyleneimine composite solution for polymerization crosslinking reaction to obtain the self-lubricating fiber fabric.
Preferably, the power of the plasma treatment is 30W-200W, and the time is 1 min-40 min.
Preferably, the growing metal organic framework compound comprises: immersing the activated fiber fabric into a metal salt aqueous solution for loading, and then adding an organic compound aqueous solution for carrying out a composite reaction; the concentration of the metal salt water solution is 0.005 mol/L-0.5 mol/L; the concentration of the organic compound aqueous solution is 0.05 mol/L-1.2 mol/L; the volume ratio of the aqueous metal salt solution to the aqueous organic compound solution is 1: (1-3).
Preferably, the metal salt in the aqueous metal salt solution comprises a transition metal salt; the transition metal salt includes a cobalt ion salt or a zinc ion salt.
Preferably, the concentration of the metal salt in the metal salt ethanol solution is 0.005 mol/L-0.5 mol/L.
Preferably, in the dopamine-silane coupling agent-polyethyleneimine composite solution, the concentration of dopamine is 0.1 mg/mL-20 mg/mL, the concentration of silane coupling agent is 0.1 mg/mL-1 g/mL, and the concentration of polyethyleneimine is 0.1 mg/mL-40 mg/mL.
The invention also provides the self-lubricating fiber fabric obtained by the preparation method in the technical scheme.
The invention also provides a self-lubricating liner fabric composite material, which comprises the self-lubricating fiber fabric and resin in the technical scheme; the resin comprises phenolic resin, polyimide resin or epoxy resin.
Preferably, the mass fraction of the self-lubricating fiber fabric in the self-lubricating liner fabric composite material is 15-35%.
The invention also provides a preparation method of the self-lubricating liner fabric composite material, which comprises the following steps:
soaking a self-lubricating fiber fabric in resin, and curing to obtain the self-lubricating liner fabric composite material;
the curing temperature is 120-300 ℃, the pressure is 0.1-1 MPa, and the curing time is 30 min-6 h.
The invention provides a preparation method of a self-lubricating fiber fabric, which comprises the following steps: carrying out plasma treatment on the fiber fabric to obtain an activated fiber fabric; growing a metal organic framework compound on the surface of the activated fiber fabric to obtain a fiber fabric modified by the metal organic framework compound; immersing the fiber fabric modified by the metal organic framework compound into an etching solution for etching treatment to obtain a fiber fabric loaded by metal hydroxide; the etching solution is a metal salt ethanol solution; the metal salt in the metal salt ethanol solution is consistent with the metal salt in the metal organic framework compound precursor solution; and immersing the metal hydroxide-loaded fiber fabric into a dopamine-silane coupling agent-polyethyleneimine composite solution for polymerization crosslinking reaction to obtain the self-lubricating fiber fabric. The invention carries out plasma treatment on the fiber fabric, increases-OH and-NH on the surface of the fiber fabric 2 The content of functional groups is equal, so that the activity of the surface of the fiber fabric is improved, and the subsequent grafting and polymerization of substances are facilitated. Growing a metal organic framework compound on the surface of the activated fiber fabric, and further loading a layer of flaky metal organic framework compound on the surface of the fiber fabric(ii) a Immersing the fiber fabric loaded with the metal-organic framework compound into an etching solution, carrying out in-situ etching on the metal-organic framework compound by using metal salt which is in the same chemical combination with the metal-organic framework compound in the etching solution, and constructing lamellar metal hydroxide which is distributed in a direction vertical to the axial direction of the fiber on the surface of the fiber, wherein the metal hydroxide is used as a reinforcing component in an interface phase, so that the interface strength between the fiber fabric and resin is improved; the fiber fabric loaded with the metal hydroxide is immersed into a dopamine-silane coupling agent-polyethyleneimine composite solution to carry out polymerization crosslinking reaction, the dopamine, polyethyleneimine and silane coupling agent in the composite solution are subjected to polymerization reaction, the copolymer of the dopamine, polyethyleneimine and silane coupling agent is modified among metal hydroxide sheet layers, and the polymer is used as a toughening component in an interface phase through interaction of hydrogen bonds and van der Waals acting force with the metal hydroxide, so that the interface toughness between the fiber fabric and resin is improved. The self-lubricating fiber fabric has the advantages that the interface reinforcing component (metal hydroxide) and the interface toughening component (dopamine-silane coupling agent-polyethyleneimine polymeric layer) are simultaneously provided, when the self-lubricating fiber fabric is subjected to external and internal stress, the generation of cracks can be reduced by the interface reinforcing component, the expansion of microcracks can be inhibited by the interface toughening component, and the service life of the self-lubricating fiber fabric is further prolonged.
The invention provides the self-lubricating fiber fabric obtained by the preparation method in the technical scheme. The self-lubricating fiber fabric provided by the invention can construct a strong-toughness integrated interface phase on a fiber-resin interface, namely, the interface toughness is improved while the interface bonding strength is improved. When the self-lubricating fiber fabric is subjected to external and internal stress, the reinforcing component in the tough interface phase can reduce the generation of cracks, and the toughening component can inhibit the expansion of microcracks, so that the service life of the self-lubricating fiber fabric is prolonged.
The invention provides a self-lubricating liner fabric composite material, which comprises the self-lubricating fiber fabric and resin in the technical scheme; the resin comprises phenolic resin, polyimide resin or epoxy resin. The self-lubricating liner fabric composite material has excellent self-lubricating performance and long service life.
Drawings
FIG. 1 is a graph showing the change of the friction coefficient of the biomimetic interface phase modified self-lubricating fiber fabric composite material obtained in example 1 with time;
FIG. 2 is a graph of the coefficient of friction of the respective lubricating spacer fabric composite of example 2 as a function of time;
FIG. 3 is a graph of the average coefficient of friction of the respective lubricating spacer fabric composites of example 2;
FIG. 4 is a graph of the average wear rate of the respective lubricating spacer fabric composites of example 2;
FIG. 5 is a graph showing the relationship between the change of the friction coefficient of the biomimetic interface phase modified self-lubricating fiber fabric resin composite material obtained in example 3 with time;
FIG. 6 is a graph showing the relationship between the change of the friction coefficient of the biomimetic interface phase modified self-lubricating fiber fabric resin composite material obtained in example 4 with time.
Detailed Description
The invention provides a preparation method of a self-lubricating fiber fabric, which comprises the following steps:
carrying out plasma treatment on the fiber fabric to obtain an activated fiber fabric;
growing a metal organic framework compound on the surface of the activated fiber fabric to obtain a fiber fabric modified by the metal organic framework compound;
immersing the fiber fabric modified by the metal organic framework compound into an etching solution for etching treatment to obtain a fiber fabric loaded by metal hydroxide; the etching solution is a metal salt ethanol solution; the metal salt in the metal salt ethanol solution is consistent with the metal salt in the metal organic framework compound precursor solution;
and immersing the metal hydroxide-loaded fiber fabric into a dopamine-silane coupling agent-polyethyleneimine composite solution for polymerization crosslinking reaction to obtain the self-lubricating fiber fabric.
In the present invention, the starting materials used in the present invention are preferably commercially available products unless otherwise specified.
The invention carries out plasma treatment on the fiber fabric to obtain the activated fiber fabric.
In the present invention, the fiber fabric preferably includes an aramid fiber/polytetrafluoroethylene fiber blended fabric, a polyimide fiber/polytetrafluoroethylene fiber blended fabric, a glass fiber/polytetrafluoroethylene fiber blended fabric or a polyetheretherketone fiber/polytetrafluoroethylene fiber blended fabric. In the present invention, the fiber fabric is preferably washed before being subjected to plasma treatment; the washing reagent and the washing times are not particularly limited, as long as the oxides and the like on the surface of the fiber fabric can be washed clean.
In the present invention, the power of the plasma treatment is preferably 30W to 200W, and more preferably 100W; the time is preferably 1min to 40min.
In the invention, the plasma treatment can increase-OH and-NH on the surface of the fiber fabric 2 The content of the functional groups is equal, which is beneficial to the grafting and compounding of subsequent substances.
After the activated fiber fabric is obtained, the metal organic framework compound grows on the surface of the activated fiber fabric, and the fiber fabric modified by the metal organic framework compound is obtained.
In the present invention, the growing metal-organic framework compound preferably comprises: and (3) immersing the activated fiber fabric into a metal salt aqueous solution for loading, and then adding an organic compound aqueous solution for carrying out a composite reaction. In the present invention, the metal salt in the aqueous metal salt solution preferably includes a transition metal salt; the transition metal salt preferably comprises a cobalt ion salt or a zinc ion salt. In the present invention, the organic compound in the aqueous organic compound solution preferably includes 2-methylimidazole, terephthalic acid, trimesic acid, or 1, 2-diphenyl-1, 2-bis (4-carboxystyrene) ethylene, and further preferably includes 2-methylimidazole.
In the present invention, the concentration of the aqueous solution of the metal salt is preferably 0.005mol/L to 0.5mol/L, more preferably 0.01 mol/L to 0.1mol/L, and the concentration of the aqueous solution of the organic compound is preferably 0.05mol/L to 1.2mol/L, more preferably 0.1mol/L to 1.0mol/L. In the present invention, the volume ratio of the aqueous metal salt solution to the aqueous organic compound solution is preferably 1: (1 to 3), more preferably 1:1.
in the present invention, the time for the loading is preferably 10 to 30min, and more preferably 15min; the loading is preferably carried out under ultrasonic conditions.
In the present invention, the temperature of the complex reaction is preferably room temperature, i.e., neither additional heating nor additional cooling is required. In the present invention, the time of the complex reaction is preferably 2 to 24 hours, and more preferably 8 to 16 hours. In the present invention, the mode of the complex reaction is preferably a standing state.
After the composite reaction, the fiber fabric is taken out, washed and dried in sequence to obtain the fiber fabric modified by the metal organic framework compound. In the present invention, the washing agent preferably comprises water, which preferably comprises deionized water. In the present invention, the temperature of the drying is preferably 80 ℃, and the time of the drying is not particularly limited in the present invention, as long as the drying is performed to a constant weight.
After the fiber fabric modified by the metal organic framework compound is obtained, the fiber fabric modified by the metal organic framework compound is immersed into an etching solution for etching treatment to obtain a fiber fabric loaded by metal hydroxide; the etching solution is a metal salt ethanol solution; the metal salt in the metal salt ethanol solution is consistent with the metal salt in the metal organic framework compound precursor solution.
In the invention, the etching solution is a metal salt ethanol solution; the metal salt in the metal salt ethanol solution is consistent with the metal salt in the metal organic framework compound precursor solution. In the present invention, the concentration of the metal salt in the metal salt ethanol solution is preferably 0.005mol/L to 0.5mol/L.
In the invention, the temperature of the etching treatment is preferably room temperature, namely, neither extra heating nor extra cooling is needed; the time of the etching treatment is preferably 3min to 2h, and more preferably 30min to 60min. In the present invention, the etching treatment is preferably performed by standing.
After the etching treatment, the invention also comprises the step of taking out the fiber fabric, and sequentially washing and drying the fiber fabric to obtain the fiber fabric loaded with the metal hydroxide. In the present invention, the washing agent preferably comprises water, which preferably comprises deionized water. In the present invention, the temperature of the drying is preferably 80 ℃, and the time of the drying is not particularly limited in the present invention, as long as the drying is performed to a constant weight.
In the invention, the etching treatment can carry out in-situ etching on the metal organic framework compound to obtain the metal hydroxide with the strength-enhancing component.
After the metal hydroxide loaded fiber fabric is obtained, the metal hydroxide loaded fiber fabric is immersed into a dopamine-silane coupling agent-polyethyleneimine composite solution for polymerization and crosslinking reaction, and the self-lubricating fiber fabric is obtained.
In the invention, the concentration of dopamine in the dopamine-silane coupling agent-polyethyleneimine composite solution is preferably 0.1-20 mg/mL, and more preferably 1-10 mg/mL; the concentration of the silane coupling agent is preferably 0.1 mg/mL-1 g/mL, more preferably 0.5 mg/mL-100 mg/mL, more preferably 1 mg/mL-10 mg/mL, and the concentration of polyethyleneimine is preferably 0.1 mg/mL-40 mg/mL, more preferably 0.5 mg/mL-30 mg/mL, more preferably 1 mg/mL-10 mg/mL. In the present invention, the silane coupling agent preferably includes one or more of 3-aminopropyltriethoxysilane, 1, 2-epoxypropyltriethoxysilane, and 3-mercaptopropyltrimethoxysilane.
In the present invention, the temperature of the polymerization crosslinking reaction is preferably room temperature, i.e., neither additional heating nor additional cooling is required; the time of the polymerization crosslinking reaction is preferably 2 to 72 hours. In the present invention, the mode of the polymerization crosslinking reaction is preferably a standing state.
After the polymerization crosslinking reaction, the invention preferably further comprises taking out the fiber fabric, and sequentially washing and drying the fiber fabric to obtain the self-lubricating fiber fabric. In the present invention, the washing agent preferably comprises water, which preferably comprises deionized water. In the present invention, the temperature of the drying is preferably 80 ℃, and the time of the drying is not particularly limited in the present invention as long as the drying is performed to a constant weight.
In the present invention, the polymerization crosslinking reaction can form a hybrid layer of the toughening component dopamine-silane coupling agent-polyethyleneimine polymer on the surface of the metal hydroxide.
The invention also provides the self-lubricating fiber fabric obtained by the preparation method in the technical scheme. The self-lubricating fiber fabric provided by the invention can construct a strong-toughness integrated interface phase on a fiber-resin interface, namely, the interface toughness is improved while the interface bonding strength is improved. When the self-lubricating fiber fabric is subjected to external and internal stresses, the reinforcing component in the tough interface phase can reduce the generation of cracks, and the toughening component can inhibit the expansion of microcracks, so that the service life of the self-lubricating fiber fabric is prolonged.
The invention also provides a self-lubricating liner fabric composite material, which comprises the self-lubricating fiber fabric and resin in the technical scheme; the resin comprises phenolic resin, polyimide resin or epoxy resin.
In the invention, the mass fraction of the self-lubricating fiber fabric in the self-lubricating liner fabric composite material is preferably 15-35%.
The invention also provides a preparation method of the self-lubricating liner fabric composite material, which comprises the following steps:
and (3) soaking the self-lubricating fiber fabric in resin, and curing to obtain the self-lubricating liner fabric composite material.
The number of times of impregnation is not particularly limited as long as the mass fraction of the self-lubricating fiber fabric in the self-lubricating liner fabric composite material meets the requirement.
In the present invention, the curing temperature is preferably 120 to 300 ℃; the pressure is preferably 0.1-1 MPa; the curing time is preferably 30min to 6h.
The self-lubricating fiber fabric and the preparation method thereof, the self-lubricating liner fabric composite material and the preparation method thereof provided by the present invention will be described in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.
Example 1
(1) And (3) carrying out plasma treatment on the washed Nomex/PTFE self-lubricating fiber fabric in an air atmosphere to increase the content of active functional groups on the surface of the fiber, wherein the plasma treatment power is 100W, the time is 5min for an adhesive surface, and the time is 5min for a lubricating surface.
(2) And (2) immersing the self-lubricating fiber fabric subjected to air plasma activation treatment into 50mL of cobalt chloride hexahydrate solution (the concentration is 0.05 mol/L), performing ultrasonic treatment for 15min, then adding 50mL of 2-methylimidazole solution into the solution (the concentration is 0.4 mol/L), standing for reaction for 8h, taking out deionized water for washing, and drying at 80 ℃ to obtain the Co-MOFs loaded self-lubricating fiber fabric. The solvent used in the reaction system is deionized water, and the concentration is the concentration before mixing.
(3) Soaking the Co-MOFs loaded self-lubricating fiber fabric into 6mg/mL cobalt chloride hexahydrate ethanol solution, and carrying out etching treatment for 35min to obtain a metal hydroxide loaded self-lubricating fiber fabric;
(4) Immersing the self-lubricating fiber fabric loaded with metal hydroxide into a dopamine-silane coupling agent-polyethyleneimine composite system to prepare a toughening component in a bionic interface phase, wherein the concentration of dopamine is 2mg/mL, the concentration of 3-aminopropyltriethoxysilane is 1mg/mL, the concentration of polyethyleneimine is 1mg/mL, and reacting for 24 hours at room temperature to obtain the bionic interface phase modified self-lubricating fiber fabric.
And (3) immersing the obtained bionic interface phase modified self-lubricating fiber fabric into a phenolic resin solution, repeatedly immersing until the mass fraction of the fiber fabric reaches 75 +/-2%, adhering the immersed wet composite material to the surface of the metal base material, and curing at 0.2MPa and 184 ℃ for 140min to obtain the bionic interface phase modified self-lubricating fiber fabric composite material.
Under the room temperature environment, the friction coefficient of the self-lubricating liner fabric composite material is obtained by 80MPa dynamic load, the rotating speed of 280 revolutions per minute and a rotating friction test of 2 h: 0.040, the wear rate is: 0.729X 10 -14 m 3 /N·m。
FIG. 1 is a graph showing the change of the friction coefficient of the obtained biomimetic interface phase modified self-lubricating fiber fabric composite material with time. As can be seen from fig. 1: although the friction coefficient of the bionic interface phase modified self-lubricating fiber fabric composite material obtained in the embodiment is small, the friction running-in period is long.
Example 2
(1) And (3) carrying out plasma treatment on the washed Nomex/PTFE self-lubricating fiber fabric in an air atmosphere to increase the content of active functional groups on the surface of the fiber, wherein the plasma treatment power is 100W, the time is 10min for an adhesive surface, and the time is 10min for a lubricating surface.
(2) And (2) immersing the self-lubricating fiber fabric subjected to air plasma activation treatment in 50mL of cobalt chloride hexahydrate solution (the concentration is 0.05 mol/L), carrying out ultrasonic treatment for 15min, then adding 50mL of 2-methylimidazole solution into the solution (the concentration is 0.4 mol/L), standing for reaction for 8h, taking out deionized water for washing, and drying at 80 ℃ to obtain the Co-MOFs loaded self-lubricating fiber fabric.
(3) And (3) immersing the Co-MOFs loaded self-lubricating fiber fabric into 6mg/mL cobalt chloride hexahydrate ethanol solution, and carrying out etching treatment for 35min to obtain the metal hydroxide loaded self-lubricating fiber fabric.
(4) Immersing the self-lubricating fiber fabric loaded with metal hydroxide into a dopamine-silane coupling agent-polyethyleneimine composite system to prepare a toughening component in a bionic interface phase, wherein the concentration of dopamine is 2mg/mL, the concentration of 3-aminopropyltriethoxysilane is 1mg/mL, the concentration of polyethyleneimine is 1mg/mL, and reacting for 24 hours at room temperature to obtain the bionic interface phase modified self-lubricating fiber fabric.
Respectively soaking the washed Nomex/PTFE self-lubricating fiber fabric, the Co-MOFs loaded self-lubricating fiber fabric obtained in the step (2), the metal hydroxide loaded self-lubricating fiber fabric obtained in the step (3) and the bionic interface phase modified self-lubricating fiber fabric obtained in the step (4) into a phenolic resin solution, repeatedly soaking until the mass fraction of the fabrics reaches 75 +/-2%, adhering the soaked wet composite material to the surface of a metal base material, and curing at 0.2MPa and 184 ℃ for 140min to obtain the composite material of the respective lubricating liner fabrics.
Under the room temperature environment, the friction coefficient of the bionic interface phase modified self-lubricating fiber fabric composite material is obtained by 80MPa dynamic load, 280 revolutions per minute of rotating speed and 2 hours of rotating friction test: 0.046, the wear rate is: 0.704 × 10 -14 m 3 /N·m。
Fig. 2 is a graph of the change of the friction coefficient of the fabric composite material of the respective lubricating liners with time, wherein (a) is a graph of the change of the friction coefficient of the untreated self-lubricating fiber fabric resin composite material with time, (b) is a graph of the change of the friction coefficient of the Co-MOFs-loaded self-lubricating fiber fabric resin composite material with time, (c) is a graph of the change of the friction coefficient of the metal hydroxide-loaded self-lubricating fiber fabric resin composite material with time, and (d) is a graph of the change of the friction coefficient of the bionic interface-phase-modified self-lubricating fiber fabric resin composite material with time. As can be seen from fig. 2: the untreated self-lubricating fiber fabric resin composite material, the Co-MOFs loaded self-lubricating fiber fabric resin composite material and the metal hydroxide loaded self-lubricating fiber fabric resin composite material have larger friction coefficient fluctuation and longer running-in period. However, for the bionic interface phase modified self-lubricating fiber fabric resin composite material, the running-in period is 25min, and the friction coefficient fluctuation in the stabilization period is very small.
Fig. 3 is a graph of the average coefficient of friction of the respective lubricated cushioning fabric composite, and fig. 4 is a graph of the average wear rate of the respective lubricated cushioning fabric composite, as can be seen from fig. 3 and 4: the friction coefficient of the Co-MOFs loaded self-lubricating fiber fabric resin composite material after MOFs loading is increased, but the abrasion rate of the gasket is greatly reduced; for Co (OH) 2 The friction coefficient of the self-lubricating liner modified by the modified and bionic interface phase is reduced, and the bionic interface phase modified self-lubricating fiber fabric resin composite material shows the minimum wear rate.
Example 3
(1) And (3) carrying out plasma treatment on the washed Nomex/PTFE self-lubricating fiber fabric in an air atmosphere to increase the content of active functional groups on the surface of the fiber, wherein the plasma treatment power is 100W, the time is 5min for an adhesive surface, and the time is 5min for a lubricating surface.
(2) And (2) immersing the self-lubricating fiber fabric subjected to air plasma activation treatment into 50mL of cobalt chloride hexahydrate solution (the concentration is 0.05 mol/L), performing ultrasonic treatment for 15min, then adding 50mL of 2-methylimidazole solution into the solution (the concentration is 0.4 mol/L), standing for reaction for 16h, taking out deionized water for washing, and drying at 80 ℃ to obtain the Co-MOFs loaded self-lubricating fiber fabric.
(3) Soaking the Co-MOFs loaded self-lubricating fiber fabric into 6mg/mL cobalt chloride hexahydrate ethanol solution, and carrying out etching treatment for 35min to obtain a metal hydroxide loaded self-lubricating fiber fabric;
(4) And immersing the self-lubricating fiber fabric loaded with the metal hydroxide into a dopamine-silane coupling agent-polyethyleneimine composite system to prepare a toughening component in a bionic interphase, wherein the concentration of dopamine is 2mg/mL, the concentration of 3-aminopropyltriethoxysilane is 1mg/mL, the concentration of polyethyleneimine is 1mg/mL, and reacting at room temperature for 24 hours to obtain the bionic interphase modified self-lubricating fiber fabric.
Immersing the bionic interface phase modified self-lubricating fiber fabric into a phenolic resin solution, repeatedly immersing until the mass fraction of the fabric reaches 75 +/-2%, adhering the wet impregnated composite material to the surface of a metal substrate, and curing at 0.2MPa and 184 ℃ for 140min to obtain the bionic interface phase modified self-lubricating fiber fabric resin composite material.
Under the room temperature environment, the friction coefficient of the bionic interface phase modified self-lubricating fiber fabric resin composite material is obtained by 80MPa dynamic load, the rotating speed of 280 revolutions per minute and a rotational friction test of 2 hours, wherein the friction coefficient is as follows: 0.059, the wear rate is: 0.808X 10 -14 m 3 /N·m。
FIG. 5 is a graph showing the change of the friction coefficient of the obtained biomimetic interface phase modified self-lubricating fiber fabric resin composite material with time. As can be seen from fig. 5: the friction coefficient of the self-lubricating fiber fabric resin composite material modified by the bionic interface phase obtained in the embodiment is large in fluctuation and unstable.
Example 4
(1) And (3) carrying out plasma treatment on the washed Nomex/PTFE self-lubricating fiber fabric in an air atmosphere to increase the content of active functional groups on the surface of the fiber, wherein the plasma treatment power is 100W, the time is 5min for an adhesive surface, and the time is 5min for a lubricating surface.
(2) And (2) immersing the self-lubricating fiber fabric subjected to air plasma activation treatment into 50mL of cobalt chloride hexahydrate solution (the concentration is 0.05 mol/L), performing ultrasonic treatment for 15min, then adding 50mL of 2-methylimidazole solution into the solution (the concentration is 0.4 mol/L), standing for reaction for 16h, taking out deionized water for washing, and drying at 80 ℃ to obtain the Co-MOFs loaded self-lubricating fiber fabric.
(3) And (3) soaking the Co-MOFs loaded self-lubricating fiber fabric into 6mg/mL cobalt chloride hexahydrate ethanol solution, and carrying out etching treatment for 35min to obtain the metal hydroxide loaded self-lubricating fiber fabric.
(4) Immersing the self-lubricating fiber fabric loaded with metal hydroxide into a dopamine-silane coupling agent-polyethyleneimine composite system to prepare a toughening component in a bionic interface phase, wherein the concentration of dopamine is 2mg/mL, the concentration of 3-aminopropyltriethoxysilane is 2mg/mL, the concentration of polyethyleneimine is 1mg/mL, and reacting for 24 hours at room temperature to obtain the bionic interface phase modified self-lubricating fiber fabric.
Immersing the bionic interface phase modified self-lubricating fiber fabric into a phenolic resin solution, repeatedly immersing until the mass fraction of the fabric reaches 75 +/-2%, adhering the wet composite material after immersion to the surface of a metal base material, and curing at 0.2MPa and 184 ℃ for 140min to obtain the bionic interface phase modified self-lubricating fiber fabric resin composite material.
Under the room temperature environment, the friction coefficient of the bionic interface phase modified self-lubricating fiber fabric resin composite material is obtained by 80MPa dynamic load, 280 revolutions per minute of rotating speed and 2 hours of rotating friction test: 0.055, wear rate: 0.755X 10 -14 m 3 /N·m。
FIG. 6 is a graph showing the change of the friction coefficient of the obtained biomimetic interface phase modified self-lubricating fiber fabric resin composite material with time. As can be seen from fig. 6: the friction coefficient of the self-lubricating fiber fabric resin composite material modified by the bionic interface phase obtained in the embodiment is large in fluctuation and unstable.
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 (10)
1. A preparation method of a self-lubricating fiber fabric is characterized by comprising the following steps:
carrying out plasma treatment on the fiber fabric to obtain an activated fiber fabric;
growing a metal organic framework compound on the surface of the activated fiber fabric to obtain a fiber fabric modified by the metal organic framework compound;
immersing the fiber fabric modified by the metal organic framework compound into an etching solution for etching treatment to obtain a fiber fabric loaded by metal hydroxide; the etching solution is a metal salt ethanol solution; the metal salt in the metal salt ethanol solution is consistent with the metal salt in the metal organic framework compound precursor solution;
and immersing the metal hydroxide-loaded fiber fabric into a dopamine-silane coupling agent-polyethyleneimine composite solution for polymerization crosslinking reaction to obtain the self-lubricating fiber fabric.
2. The method according to claim 1, wherein the plasma treatment is performed at a power of 30W to 200W for 1min to 40min.
3. The method of claim 1, wherein growing the metal-organic framework compound comprises: immersing the activated fiber fabric into a metal salt aqueous solution for loading, and then adding an organic compound aqueous solution for carrying out a composite reaction; the concentration of the metal salt water solution is 0.005 mol/L-0.5 mol/L; the concentration of the organic compound aqueous solution is 0.05 mol/L-1.2 mol/L; the volume ratio of the metal salt aqueous solution to the organic compound aqueous solution is 1: (1-3).
4. The production method according to claim 3, wherein the metal salt in the aqueous metal salt solution comprises a transition metal salt; the transition metal salt includes a cobalt ion salt or a zinc ion salt.
5. The method according to claim 1, wherein the concentration of the metal salt in the metal salt ethanol solution is 0.005mol/L to 0.5mol/L.
6. The preparation method according to claim 1, wherein in the dopamine-silane coupling agent-polyethyleneimine composite solution, the concentration of dopamine is 0.1mg/mL to 20mg/mL, the concentration of silane coupling agent is 0.1mg/mL to 1g/mL, and the concentration of polyethyleneimine is 0.1mg/mL to 40mg/mL.
7. A self-lubricating fiber fabric obtained by the production method according to any one of claims 1 to 6.
8. A self-lubricating liner fabric composite comprising the self-lubricating fibrous fabric of claim 7 and a resin; the resin comprises phenolic resin, polyimide resin or epoxy resin.
9. The self-lubricating spacer fabric composite of claim 8 wherein the self-lubricating fibrous fabric is present in the self-lubricating spacer fabric composite in a mass fraction of 15 to 35%.
10. A process for the preparation of a self-lubricating backing fabric composite according to any one of claims 8 to 9, characterised in that it comprises the steps of:
dipping a self-lubricating fiber fabric into resin, and curing to obtain the self-lubricating liner fabric composite material;
the curing temperature is 120-300 ℃, the pressure is 0.1-1 MPa, and the curing time is 30 min-6 h.
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