CN111607226A - Preparation method of stern bearing composite material with high bonding strength for ships - Google Patents
Preparation method of stern bearing composite material with high bonding strength for ships Download PDFInfo
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- CN111607226A CN111607226A CN202010391667.4A CN202010391667A CN111607226A CN 111607226 A CN111607226 A CN 111607226A CN 202010391667 A CN202010391667 A CN 202010391667A CN 111607226 A CN111607226 A CN 111607226A
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- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 43
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000498 ball milling Methods 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000007822 coupling agent Substances 0.000 claims abstract description 22
- 239000003063 flame retardant Substances 0.000 claims abstract description 22
- 239000003607 modifier Substances 0.000 claims abstract description 22
- 239000004642 Polyimide Substances 0.000 claims abstract description 21
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 21
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical compound C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 21
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 21
- 229920001721 polyimide Polymers 0.000 claims abstract description 21
- 239000004626 polylactic acid Substances 0.000 claims abstract description 21
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 229920002545 silicone oil Polymers 0.000 claims abstract description 19
- 150000005690 diesters Chemical class 0.000 claims abstract description 13
- 238000005303 weighing Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- -1 phthalic acid diester Chemical class 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- XNGIFLGASWRNHJ-UHFFFAOYSA-N o-dicarboxybenzene Natural products OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 238000007670 refining Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004593 Epoxy Chemical group 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 2
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 claims description 2
- 229920003232 aliphatic polyester Polymers 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical group [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000001993 wax Substances 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- CYEBJEDOHLIWNP-UHFFFAOYSA-N methanethioamide Chemical compound NC=S CYEBJEDOHLIWNP-UHFFFAOYSA-N 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention relates to the technical field of bearing material preparation, and discloses a preparation method of a stern bearing composite material for a ship with high bonding strength, which comprises the following steps: s1, preparing the following raw materials in parts by weight: 43-47 parts of polyimide, 28-32 parts of fluororubber, 25-29 parts of a flame retardant, 18-22 parts of silicon carbide, 18-22 parts of graphite fluoride, 11-15 parts of a coupling agent, 8-12 parts of N, N-tetramethyl dithiodithiodithiodiethanolamine, 9-11 parts of a vulcanizing agent, 9-11 parts of polylactic acid, 9-11 parts of phthalic diester, 3-7 parts of a modifier and 3-7 parts of silicone oil; s2, weighing the raw materials in the step S1, adding the polyimide, the fluororubber, the silicon carbide and the graphite fluoride into a ball mill, and carrying out ball milling to obtain a mixture A. The invention has reasonable design, simple preparation process and low preparation cost, effectively improves the strength and the wear resistance of the bearing composite material, and is suitable for the fields of ships and machinery.
Description
Technical Field
The invention relates to the technical field of bearing material preparation, in particular to a preparation method of a stern bearing composite material for a ship with high bonding strength.
Background
Compared with the performance of four bearing materials, namely common bearing steel AISI52100(GCr15), stainless steel AISI440(9Cr18), silicon nitride (Si3N4) and zirconium oxide (ZrO2), a ceramic bearing is taken as an important mechanical base part, and the ceramic bearing has excellent performance which cannot be compared with a metal bearing, and is resistant to high temperature, ultra-strength and the like, so that the ceramic bearing is popular in the world of new materials. Has been increasingly widely used in various fields of the national civilization for more than ten years.
At present, the main bearing used for ships has great requirements on the lubrication degree and the strength, as well as the high temperature resistance and the wear resistance degree. The existing ship main bearing adopts a single high-temperature resistant base material and an additive to achieve the effects of lubrication and wear resistance, is easy to wear and has high replacement rate although the price is low and the material preparation method is simple, and cannot play a great role in the field of ships. Therefore, we propose a method for preparing a stern bearing composite material for ships with high bonding strength to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects that in the prior art, although the price is low and the material preparation method is simple, the material is easy to wear and has high replacement rate and cannot play a great role in the field of ships, and provides a preparation method of a stern bearing composite material for ships with high bonding strength.
A preparation method of a stern bearing composite material for a ship with high bonding strength comprises the following steps:
s1, preparing the following raw materials in parts by weight: 43-47 parts of polyimide, 28-32 parts of fluororubber, 25-29 parts of a flame retardant, 18-22 parts of silicon carbide, 18-22 parts of graphite fluoride, 11-15 parts of a coupling agent, 8-12 parts of N, N-tetramethyl dithiodithiodithiodiethanolamine, 9-11 parts of a vulcanizing agent, 9-11 parts of polylactic acid, 9-11 parts of phthalic diester, 3-7 parts of a modifier and 3-7 parts of silicone oil;
s2, weighing the raw materials in the step S1, adding polyimide, fluororubber, silicon carbide and graphite fluoride into a ball mill, and carrying out ball milling to obtain a mixture A;
s3, adding the weighed flame retardant into the mixture A, stirring for 3-5 min at a speed of 220-240 r/min, heating while stirring, heating to 65-85 ℃, stopping heating, continuously adding N, N-tetramethyl dithiobis-thionylamine, polylactic acid and silicone oil, and stirring for 20-24 min to obtain a mixture B;
s4, sequentially adding the phthalic acid diester, the coupling agent, the vulcanizing agent and the mixture B into a vacuum furnace, refining for 12-16 min at the temperature of 800-840 ℃, cooling to 80-100 ℃, adding the modifier, uniformly mixing, and naturally cooling to normal temperature to obtain a mixture C;
s5, placing the mixture C into a mold, demolding and shaping to obtain a plurality of spherical pieces D, placing the spherical pieces D into a drying box, heating to 180-220 ℃, taking out to carry out six-face simultaneous cooling, repeating for 2-3 times, and finally placing into a grinder to grind into powder to obtain the high-strength ship main bearing composite material.
Preferably, in the step S1, the following raw materials in parts by weight are prepared: 44-46 parts of polyimide, 29-31 parts of fluororubber, 26-28 parts of a flame retardant, 19-21 parts of silicon carbide, 19-21 parts of graphite fluoride, 12-14 parts of a coupling agent, 9-11 parts of N, N-tetramethyl dithiobis-thiocarboxamine, 9.5-10.5 parts of a vulcanizing agent, 9.5-10.5 parts of polylactic acid, 9.5-10.5 parts of phthalic diester, 4-6 parts of a modifier and 4-6 parts of silicone oil.
Preferably, in the step S1, the following raw materials in parts by weight are prepared: 45 parts of polyimide, 30 parts of fluororubber, 27 parts of flame retardant, 20 parts of silicon carbide, 20 parts of graphite fluoride, 13 parts of coupling agent, 10 parts of N, N-tetramethyl dithiobis-thiocarboxamine, 10 parts of vulcanizing agent, 10 parts of polylactic acid, 10 parts of phthalic diester, 5 parts of modifier and 5 parts of silicone oil.
Preferably, the mass ratio of the vulcanizing agent to the polylactic acid to the phthalic diester is 1:1: 1.
Preferably, in S1, the ball milling medium is an ethanol solvent, and the ball milling time is 40-60 min.
Preferably, the flame retardant is magnesium hydroxide and/or aluminum hydroxide and/or a shaving compound and/or a phosphorus-based and/or nitrogen-based and/or phosphorus-nitrogen-based.
Preferably, the coupling agent is a silane coupling agent or an aluminate ester containing an amino group and/or an epoxy bond.
Preferably, the modifier is one or a combination of more than two of solid paraffin or paraffin extract, polyethylene wax and aliphatic polyester.
Preferably, in S5, the diameter of the spherical member D is 2 to 6cm, and six sides of the spherical member D are simultaneously cooled by air cooling or water cooling at the upper, lower, left, right, front, and rear sides of the spherical member D.
According to the preparation method of the high-bonding-strength ship stern bearing composite material, provided by the invention, polyimide, fluororubber and a flame retardant are used as main materials, and silicon carbide, graphite fluoride, N-tetramethyl dithiobis-thiocarboxamine and other materials are matched, so that the ship stern bearing composite material has the advantages of high temperature resistance, high impact resistance, high weather resistance and ageing resistance, high-temperature mechanical strength and wear resistance, and a coupling agent, a vulcanizing agent, a modifier and the like are used as auxiliary materials to help the main bearing composite material to further improve the strength, is not easy to corrode and further prolong the service life. The invention has reasonable design, simple preparation process and low preparation cost, effectively improves the strength and the wear resistance of the bearing composite material, and is suitable for the fields of ships and machinery.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example one
The invention provides a preparation method of a stern bearing composite material for a ship with high bonding strength, which comprises the following steps:
s1, preparing the following raw materials in parts by weight: 43 parts of polyimide, 28 parts of fluororubber, 25 parts of flame retardant, 18 parts of silicon carbide, 18 parts of graphite fluoride, 11 parts of coupling agent, 8 parts of N, N-tetramethyl dithiobis (thiocarboxamide), 9 parts of vulcanizing agent, 9 parts of polylactic acid, 9 parts of phthalic diester, 3 parts of modifier and 3 parts of silicone oil;
s2, weighing the raw materials in the step S1, adding polyimide, fluororubber, silicon carbide and graphite fluoride into a ball mill for ball milling, wherein the ball milling medium is an ethanol solvent, and the ball milling time is 40min, so as to obtain a mixture A;
s3, adding the weighed flame retardant into the mixture A, stirring for 3min at the speed of 220r/min, heating while stirring, stopping heating when the temperature is 65 ℃, continuously adding N, N-tetramethyl dithiodithiodithiobisthiocarbamide, polylactic acid and silicone oil, and stirring for 20min to obtain a mixture B;
s4, sequentially adding the phthalic acid diester, the coupling agent, the vulcanizing agent and the mixture B into a vacuum furnace, refining for 12min at 800 ℃, cooling to 80 ℃, adding the modifier, uniformly mixing, and naturally cooling to normal temperature to obtain a mixture C;
and S5, placing the mixture C into a mold, demolding and shaping to obtain a plurality of spherical parts D with the diameter of 2cm, placing the spherical parts D into a drying box, heating to 180 ℃, taking out and simultaneously cooling the upper surface, the lower surface, the left surface, the right surface, the front surface and the rear surface of the spherical parts D for six surfaces, repeating the steps for 2 times, and finally placing the spherical parts D into a grinder to grind into powder to obtain the high-strength ship main bearing composite material.
Example two
The invention provides a preparation method of a stern bearing composite material for a ship with high bonding strength, which comprises the following steps:
s1, preparing the following raw materials in parts by weight: 44 parts of polyimide, 29 parts of fluororubber, 26 parts of flame retardant, 19 parts of silicon carbide, 19 parts of graphite fluoride, 12 parts of coupling agent, 9 parts of N, N-tetramethyl dithiobis (thiocarboxamide), 9.5 parts of vulcanizing agent, 9.5 parts of polylactic acid, 9.5 parts of phthalic diester, 4 parts of modifier and 4 parts of silicone oil;
s2, weighing the raw materials in the step S1, adding polyimide, fluororubber, silicon carbide and graphite fluoride into a ball mill for ball milling, wherein the ball milling medium is an ethanol solvent, and the ball milling time is 45min, so as to obtain a mixture A;
s3, adding the weighed flame retardant into the mixture A, stirring for 3.5min at a speed of 225r/min, heating while stirring, stopping heating when the temperature is raised to 70 ℃, continuously adding N, N-tetramethyl dithiobis-thiocarboxamine, polylactic acid and silicone oil, and stirring for 21min to obtain a mixture B;
s4, sequentially adding the phthalic acid diester, the coupling agent, the vulcanizing agent and the mixture B into a vacuum furnace, refining for 13min at the temperature of 810 ℃, cooling to 85 ℃, adding the modifier, uniformly mixing, and naturally cooling to normal temperature to obtain a mixture C;
s5, placing the mixture C into a die, demolding and shaping to obtain a plurality of spherical parts D with the diameter of 3cm, placing the spherical parts D into a drying box, heating to 190 ℃, taking out and simultaneously cooling the upper surface, the lower surface, the left surface, the right surface, the front surface and the rear surface of the spherical parts D for six surfaces, repeating the steps for 2 times, and finally placing the spherical parts D into a grinder to grind into powder to obtain the high-strength ship main bearing composite material.
EXAMPLE III
The invention provides a preparation method of a stern bearing composite material for a ship with high bonding strength, which comprises the following steps:
s1, preparing the following raw materials in parts by weight: 45 parts of polyimide, 30 parts of fluororubber, 27 parts of flame retardant, 20 parts of silicon carbide, 20 parts of graphite fluoride, 13 parts of coupling agent, 10 parts of N, N-tetramethyl dithiobis (thiocarboxamide), 10 parts of vulcanizing agent, 10 parts of polylactic acid, 10 parts of phthalic diester, 5 parts of modifier and 5 parts of silicone oil;
s2, weighing the raw materials in the step S1, adding polyimide, fluororubber, silicon carbide and graphite fluoride into a ball mill for ball milling, wherein the ball milling medium is an ethanol solvent, and the ball milling time is 50min, so as to obtain a mixture A;
s3, adding the weighed flame retardant into the mixture A, stirring for 4min at the speed of 230r/min, heating while stirring, stopping heating when the temperature is 75 ℃, continuously adding N, N-tetramethyl dithiodithiodithiobisthiocarbamide, polylactic acid and silicone oil, and stirring for 22min to obtain a mixture B;
s4, sequentially adding the phthalic acid diester, the coupling agent, the vulcanizing agent and the mixture B into a vacuum furnace, refining for 14min at 820 ℃, cooling to 90 ℃, adding the modifier, uniformly mixing, and naturally cooling to normal temperature to obtain a mixture C;
and S5, placing the mixture C into a mold, demolding and shaping to obtain a plurality of spherical parts D with the diameter of 4cm, placing the spherical parts D into a drying box, heating to 200 ℃, taking out and simultaneously cooling the upper surface, the lower surface, the left surface, the right surface, the front surface and the rear surface of the spherical parts D for six surfaces, repeating the steps for 3 times, and finally placing the spherical parts D into a grinder to grind into powder to obtain the high-strength ship main bearing composite material.
Example four
The invention provides a preparation method of a stern bearing composite material for a ship with high bonding strength, which comprises the following steps:
s1, preparing the following raw materials in parts by weight: 46 parts of polyimide, 31 parts of fluororubber, 28 parts of flame retardant, 21 parts of silicon carbide, 21 parts of graphite fluoride, 14 parts of coupling agent, 11 parts of N, N-tetramethyl dithiobis (thiocarboxamide), 10 parts of vulcanizing agent, 10 parts of polylactic acid, 10.5 parts of phthalic diester, 6 parts of modifier and 6 parts of silicone oil;
s2, weighing the raw materials in the step S1, adding polyimide, fluororubber, silicon carbide and graphite fluoride into a ball mill for ball milling, wherein the ball milling medium is an ethanol solvent, and the ball milling time is 55min, so as to obtain a mixture A;
s3, adding the weighed flame retardant into the mixture A, stirring for 4.5min at the speed of 235r/min, heating while stirring, stopping heating when the temperature is up to 80 ℃, continuously adding N, N-tetramethyl dithiobis-thiocarboxamine, polylactic acid and silicone oil, and stirring for 23min to obtain a mixture B;
s4, sequentially adding the phthalic acid diester, the coupling agent, the vulcanizing agent and the mixture B into a vacuum furnace, refining for 15min at the temperature of 830 ℃, cooling to 95 ℃, adding the modifier, uniformly mixing, and naturally cooling to normal temperature to obtain a mixture C;
and S5, placing the mixture C into a mold, demolding and shaping to obtain a plurality of spherical parts D with the diameter of 5cm, placing the spherical parts D into a drying box, heating to 210 ℃, taking out and simultaneously cooling the upper surface, the lower surface, the left surface, the right surface, the front surface and the rear surface of the spherical parts D for 3 times, and finally placing the spherical parts D into a grinder to grind into powder to obtain the high-strength ship main bearing composite material.
EXAMPLE five
The invention provides a preparation method of a stern bearing composite material for a ship with high bonding strength, which comprises the following steps:
s1, preparing the following raw materials in parts by weight: 47 parts of polyimide, 32 parts of fluororubber, 29 parts of flame retardant, 22 parts of silicon carbide, 22 parts of graphite fluoride, 15 parts of coupling agent, 12 parts of N, N-tetramethyl dithiobis (thiocarboxamide), 11 parts of vulcanizing agent, 11 parts of polylactic acid, 11 parts of phthalic diester, 7 parts of modifier and 7 parts of silicone oil;
s2, weighing the raw materials in the step S1, adding polyimide, fluororubber, silicon carbide and graphite fluoride into a ball mill for ball milling, wherein the ball milling medium is an ethanol solvent, and the ball milling time is 60min, so as to obtain a mixture A;
s3, adding the weighed flame retardant into the mixture A, stirring for 5min at the speed of 240r/min, heating while stirring, stopping heating when the temperature is 85 ℃, continuously adding N, N-tetramethyl dithiodithiodithiobisthiocarbamide, polylactic acid and silicone oil, and stirring for 24min to obtain a mixture B;
s4, sequentially adding the phthalic acid diester, the coupling agent, the vulcanizing agent and the mixture B into a vacuum furnace, refining for 16min at 840 ℃, cooling to 100 ℃, adding the modifier, uniformly mixing, and naturally cooling to normal temperature to obtain a mixture C;
s5, placing the mixture C into a die, demolding and shaping to obtain a plurality of spherical parts D with the diameter of 6cm, placing the spherical parts D into a drying box, heating to 220 ℃, taking out and simultaneously cooling the upper surface, the lower surface, the left surface, the right surface, the front surface and the rear surface of the spherical parts D for 3 times, and finally placing the spherical parts D into a grinder to grind into powder to obtain the high-strength ship main bearing composite material.
The friction performance of the composite material for the main bearing of the ship obtained in the embodiment 1-5 is detected. An MRH-3A type high-speed ring block friction testing machine is adopted, and the testing conditions are as follows: loading: 66N, rotation speed: 1100rpm, time: 96h, lubricating medium: water, temperature: the weight difference before and after the friction is taken as the abrasion loss at 90 +/-2 ℃. The results are shown in Table 1.
| Coefficient of friction | Abrasion loss/mg | Whether the surface is damaged or not | |
| Example 1 | 0.016 | 2.2 | Is free of |
| Example 2 | 0.015 | 1.9 | Is free of |
| Example 3 | 0.015 | 2.1 | Is free of |
| Example 4 | 0.017 | 2.3 | Is free of |
| Example 5 | 0.016 | 2.1 | Is free of |
Table 1 results of friction performance tests of the composite materials of the main bearings of ships and warships of examples 1 to 5.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A preparation method of a stern bearing composite material for a ship with high bonding strength is characterized by comprising the following steps:
s1, preparing the following raw materials in parts by weight: 43-47 parts of polyimide, 28-32 parts of fluororubber, 25-29 parts of a flame retardant, 18-22 parts of silicon carbide, 18-22 parts of graphite fluoride, 11-15 parts of a coupling agent, 8-12 parts of N, N-tetramethyl dithiodithiodithiodiethanolamine, 9-11 parts of a vulcanizing agent, 9-11 parts of polylactic acid, 9-11 parts of phthalic diester, 3-7 parts of a modifier and 3-7 parts of silicone oil;
s2, weighing the raw materials in the step S1, adding polyimide, fluororubber, silicon carbide and graphite fluoride into a ball mill, and carrying out ball milling to obtain a mixture A;
s3, adding the weighed flame retardant into the mixture A, stirring for 3-5 min at a speed of 220-240 r/min, heating while stirring, heating to 65-85 ℃, stopping heating, continuously adding N, N-tetramethyl dithiobis-thionylamine, polylactic acid and silicone oil, and stirring for 20-24 min to obtain a mixture B;
s4, sequentially adding the phthalic acid diester, the coupling agent, the vulcanizing agent and the mixture B into a vacuum furnace, refining for 12-16 min at the temperature of 800-840 ℃, cooling to 80-100 ℃, adding the modifier, uniformly mixing, and naturally cooling to normal temperature to obtain a mixture C;
s5, placing the mixture C into a mold, demolding and shaping to obtain a plurality of spherical pieces D, placing the spherical pieces D into a drying box, heating to 180-220 ℃, taking out to carry out six-face simultaneous cooling, repeating for 2-3 times, and finally placing into a grinder to grind into powder to obtain the high-strength ship main bearing composite material.
2. The method for preparing a stern bearing composite material with high bonding strength for ships according to claim 1, wherein in S1, the following raw materials in parts by weight are prepared: 44-46 parts of polyimide, 29-31 parts of fluororubber, 26-28 parts of a flame retardant, 19-21 parts of silicon carbide, 19-21 parts of graphite fluoride, 12-14 parts of a coupling agent, 9-11 parts of N, N-tetramethyl dithiobis-thiocarboxamine, 9.5-10.5 parts of a vulcanizing agent, 9.5-10.5 parts of polylactic acid, 9.5-10.5 parts of phthalic diester, 4-6 parts of a modifier and 4-6 parts of silicone oil.
3. The method for preparing a stern bearing composite material with high bonding strength for ships according to claim 1, wherein in S1, the following raw materials in parts by weight are prepared: 45 parts of polyimide, 30 parts of fluororubber, 27 parts of flame retardant, 20 parts of silicon carbide, 20 parts of graphite fluoride, 13 parts of coupling agent, 10 parts of N, N-tetramethyl dithiobis-thiocarboxamine, 10 parts of vulcanizing agent, 10 parts of polylactic acid, 10 parts of phthalic diester, 5 parts of modifier and 5 parts of silicone oil.
4. The method for preparing a stern bearing composite material with high bonding strength for ships and warships according to claim 1, wherein the mass ratio of the vulcanizing agent, the polylactic acid and the diester phthalate is 1:1: 1.
5. The preparation method of the stern bearing composite material with high bonding strength for the ship according to claim 1, wherein in S1, the ball milling medium is an ethanol solvent, and the ball milling time is 40-60 min.
6. The method for preparing a stern bearing composite material with high bonding strength for ships and warships according to claim 1, wherein the flame retardant is magnesium hydroxide and/or aluminum hydroxide and/or a shaving compound and/or a phosphorus system and/or a nitrogen system and/or a phosphorus-nitrogen system.
7. The method for preparing a stern bearing composite material with high bonding strength for ships and warships according to claim 1, wherein the coupling agent is a silane coupling agent or aluminate containing amino and/or epoxy bonds.
8. The method for preparing a stern bearing composite material with high bonding strength for ships and warships according to claim 1, wherein the modifier is one or a combination of more than two of paraffin wax or paraffin wax extract, polyethylene wax and aliphatic polyester.
9. The method for preparing a stern bearing composite material with high bonding strength for ships and warships according to claim 1, wherein in S5, the diameter of the spherical member D is 2-6 cm, and six surfaces of the spherical member D are simultaneously cooled by air cooling or water cooling at the upper, lower, left, right, front and back surfaces of the spherical member D.
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| CN104031387A (en) * | 2014-06-27 | 2014-09-10 | 自贡中天胜新材料科技有限公司 | Self-lubricating elastic wear-resistant polyimide composite material and preparation method thereof |
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| CN104031387A (en) * | 2014-06-27 | 2014-09-10 | 自贡中天胜新材料科技有限公司 | Self-lubricating elastic wear-resistant polyimide composite material and preparation method thereof |
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