CN109467906B - Caster wheel composite material and preparation method thereof - Google Patents
Caster wheel composite material and preparation method thereof Download PDFInfo
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- CN109467906B CN109467906B CN201811429765.1A CN201811429765A CN109467906B CN 109467906 B CN109467906 B CN 109467906B CN 201811429765 A CN201811429765 A CN 201811429765A CN 109467906 B CN109467906 B CN 109467906B
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- 239000002131 composite material Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 87
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 58
- 239000004917 carbon fiber Substances 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 32
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 31
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims abstract description 31
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 239000000725 suspension Substances 0.000 claims abstract description 21
- 239000012745 toughening agent Substances 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 19
- 239000004431 polycarbonate resin Substances 0.000 claims abstract description 19
- 229920005668 polycarbonate resin Polymers 0.000 claims abstract description 19
- 239000003513 alkali Substances 0.000 claims abstract description 17
- 238000000967 suction filtration Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000001721 carbon Chemical class 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- -1 dipping acid modified carbon fiber Chemical class 0.000 claims abstract description 7
- 238000007598 dipping method Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 15
- 239000004760 aramid Substances 0.000 claims description 14
- 229920003235 aromatic polyamide Polymers 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 238000009210 therapy by ultrasound Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 9
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 239000004417 polycarbonate Substances 0.000 description 10
- 239000012994 photoredox catalyst Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 125000000524 functional group Chemical group 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
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- 238000010998 test method Methods 0.000 description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 229920007019 PC/ABS Polymers 0.000 description 1
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 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
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a caster composite material and a preparation method thereof, and relates to the technical field of high polymer materials. The caster composite material comprises the following components in parts by weight: 35-45 parts of polycarbonate resin; 15-25 parts of acrylonitrile-butadiene-styrene copolymer; 2-4 parts of a compatilizer; 6-10 parts of a toughening agent; 10-20 parts of graphite powder; 3-5 parts of surface modified carbon fiber. The preparation steps of the surface modified carbon fiber are as follows: (1) cleaning and drying carbon fibers, stirring and dipping the carbon fibers by using a hydrochloric acid solution, performing suction filtration, cleaning the carbon fibers by using deionized water, and drying the carbon fibers to obtain acid-modified carbon fibers; (2) stirring and dipping acid modified carbon fiber with a potassium hydroxide solution, carrying out suction filtration, washing with deionized water, and drying to obtain alkali modified carbon fiber; (3) and (3) dispersing the metal wear-resistant powder in water to form a suspension, adding the alkali modified carbon fiber, stirring uniformly, carrying out suction filtration, and drying to obtain the surface modified carbon fiber. The invention improves the wear resistance of the material on the premise of not reducing the mechanical property of the material.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a caster composite material and a preparation method thereof.
Background
The conductive caster is actually added with a conductive material in the caster material, and the conductive wheel is generally suitable for eliminating static electricity in a factory operation area and is silent. The general conductive wheel has the conductivity of 6 times of 10, the trial period is long, and even if the wheel is broken, the wheel can continue to conduct electricity.
The invention discloses an anti-aging conductive PC and ABS blending alloy in the Chinese patent with the publication number of CN104629312A, which comprises the following components in percentage by mass: PC 40-60%, ABS 20-30%, precipitated barium sulfate 8-12%, conductive carbon black 10-15%, toughening agent 3-8%, anti-aging agent 1-3%, compatilizer 0.5-3%, antioxidant 0.1-0.5%, and lubricant 0.5-1%.
In the patent, PC and ABS are used as main materials, and abrasive materials with good wear resistance are not added, so when the PC and ABS are used for manufacturing the caster, the wear resistance is poor, and the service life of the caster is shortened.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a caster composite material which has the advantages of good wear resistance and long service life.
The invention also aims to provide a preparation method of the caster composite material, which has the advantages of good wear resistance and long service life.
In order to achieve the first purpose, the invention provides the following technical scheme:
the caster composite material comprises the following raw materials in parts by weight:
35-45 parts of polycarbonate resin;
15-25 parts of acrylonitrile-butadiene-styrene copolymer;
2-4 parts of a compatilizer;
6-10 parts of a toughening agent;
10-20 parts of graphite powder;
3-5 parts of surface modified carbon fiber;
the preparation steps of the surface modified carbon fiber are as follows:
(1) cleaning and drying carbon fibers, stirring and dipping the carbon fibers by using a hydrochloric acid solution, performing suction filtration, cleaning the carbon fibers by using deionized water, and drying the carbon fibers to obtain acid-modified carbon fibers;
(2) stirring and dipping acid modified carbon fiber with a potassium hydroxide solution, carrying out suction filtration, washing with deionized water, and drying to obtain alkali modified carbon fiber;
(3) and (3) dispersing the metal wear-resistant powder in water to form a suspension, adding the alkali modified carbon fiber, stirring uniformly, carrying out suction filtration, and drying to obtain the surface modified carbon fiber.
By adopting the technical scheme, ash in the activated carbon can be removed by hydrochloric acid impregnation, the carbon fiber is modified by hydrochloric acid and sodium hydroxide, holes are formed, reamed and new holes are created on the surface of the carbon fiber, a developed pore structure is formed, and the pore volume of the carbon fiber is increased. The carbon fiber is modified, and meanwhile, the acidic oxygen-containing functional group and the basic oxygen-containing functional group on the surface of the carbon fiber are increased, so that the adsorption capacity of the carbon fiber on polar or non-polar substances is enhanced. Polycarbonate resin is abbreviated as PC, acrylonitrile-butadiene-styrene copolymer is abbreviated as ABS, and the PC/ABS composite material combines the excellent characteristics of the two materials, namely the formability of the ABS material and the mechanical property, the impact strength, the temperature resistance, the Ultraviolet (UV) resistance and the like of the PC. The metal wear-resistant powder enters the gaps on the surface of the carbon fiber, so that the wear resistance of the carbon fiber can be enhanced, the compatibility of the metal wear-resistant powder and the carbon fiber with PC and ABS is increased, the wear resistance of the material is improved on the premise of not reducing the mechanical property of the material, and the service life is prolonged.
The compatilizer is maleic anhydride grafted ABS or styrene/maleic anhydride copolymer compatilizer.
The toughening agent is selected from any one of a copolymer of methacrylate and acrylate, a thermoplastic polyurethane elastomer and methyl methacrylate.
More preferably, the metal wear-resistant powder is selected from any one of nano molybdenum disulfide, nano tungsten carbide and nano aluminum oxide.
By adopting the technical scheme, the molybdenum disulfide enables the material to generate a harder and more abrasion-resistant surface. Molybdenum disulfide has high affinity, is easy to fill in capillary pores of carbon fibers, and makes the surface of the material smoother.
The nano tungsten carbide has excellent characteristics such as high hardness, wear resistance, corrosion resistance, high temperature resistance and the like.
The nano alumina has the advantages of uniform particle size distribution, high purity, excellent dispersion, high temperature resistance, high hardness and wear resistance, and can obviously improve the wear resistance of the material.
More preferably, the solid-to-liquid ratio of the suspension in the step (3) is 5 to 15 g/L.
By adopting the technical scheme, a certain amount of metal wear-resistant powder is loaded in the micropores of the carbon fibers, so that the problem that the wear-resistant capability is poor due to insufficient loading of the metal wear-resistant powder is solved, or too much metal wear-resistant powder is adhered to the surfaces of the carbon fibers, and the wear resistance of the material is improved.
More preferably, the solid-to-liquid ratio of the alkali-modified carbon fibers to the suspension in the step (3) is 50 to 100 g/L.
By adopting the technical scheme, the solid-liquid ratio is controlled, so that the alkali modified carbon fiber can be fully suspended in the suspension, and the metal wear-resistant powder can fully enter the micropores of the carbon fiber.
More preferably, the ultrasonic treatment is performed after the uniform stirring in the step (3), the power of the ultrasonic treatment is 150-200W, and the treatment time is 15-25 min.
Through adopting above-mentioned technical scheme, adopt ultrasonic treatment in the flooding, accelerate the wear-resisting powder of metal and get into the micropore speed of carbon fiber on the one hand, on the other hand is favorable to the wear-resisting powder evenly distributed of metal in the micropore of carbon fiber, avoids the wear-resisting powder of metal to distribute unevenly.
More preferably, the raw material also comprises aromatic polyamide fiber, and the weight part of the aromatic polyamide fiber is 4-8 parts.
By adopting the technical scheme, the fibers which are the softest and have the least scratch resistance are compounded with the surface modified carbon fibers for use, so that the wear resistance of the material is further enhanced.
In order to achieve the second purpose, the invention provides the following technical scheme:
a preparation method of a caster composite material comprises the following steps:
step one, mixing and stirring polycarbonate resin, acrylonitrile-butadiene-styrene copolymer, compatilizer, toughening agent and graphite powder uniformly, adding surface modified carbon fiber, melting and dispersing uniformly to obtain a mixed material;
and step two, carrying out melt reaction on the mixed material, extruding and granulating to obtain the caster composite material.
By adopting the technical scheme, the carbon fiber is modified, and meanwhile, the acidic oxygen-containing functional group and the alkaline oxygen-containing functional group on the surface of the carbon fiber are increased, so that the adsorption capacity of the carbon fiber on polar or non-polar substances is enhanced, the metal wear-resistant powder enters the gaps on the surface of the carbon fiber, the wear resistance of the carbon fiber can be enhanced, the compatibility of the metal wear-resistant powder and the carbon fiber with PC and ABS is increased, the wear resistance of the material is improved on the premise of not reducing the mechanical property of the material, and the service life is prolonged.
Further preferably, the melting in the first step is performed by microwave heating, wherein the heating temperature is 220-250 ℃, and the heating time is 10-20 min.
By adopting the technical scheme, the nano-sized metal wear-resistant powder can effectively absorb microwave energy, fully heat from inside to outside, reduce the porosity and ensure that the material has higher density, thereby improving the wear resistance of the material.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) the carbon fiber is modified, and meanwhile, the acidic oxygen-containing functional group and the alkaline oxygen-containing functional group on the surface of the carbon fiber are increased, so that the adsorption capacity of the carbon fiber on polar or non-polar substances is enhanced, the metal wear-resistant powder enters gaps on the surface of the carbon fiber, the wear-resistant performance of the carbon fiber can be enhanced, the compatibility of the metal wear-resistant powder and the carbon fiber with PC and ABS is increased, the wear resistance of the material is improved on the premise of not reducing the mechanical performance of the material, and the service life is prolonged;
(2) according to the invention, the solid-liquid ratio is controlled, so that alkali modified carbon fibers can be suspended in suspension liquid, metal wear-resistant powder can enter micropores of the carbon fibers fully, ultrasonic treatment is adopted while impregnation, on one hand, the speed of the metal wear-resistant powder entering the micropores of the carbon fibers is increased, on the other hand, the metal wear-resistant powder is uniformly distributed in the micropores of the carbon fibers, and uneven distribution of the metal wear-resistant powder is avoided;
(3) by adopting microwave heating and melting, the nano-sized metal wear-resistant powder can effectively absorb microwave energy, fully heat from inside to outside, reduce porosity, enable the density of the material to be higher, and further improve the wear resistance of the material.
Drawings
FIG. 1 is a flow chart of the preparation method of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1: the caster composite material comprises the following raw materials in parts by weight:
35 parts of polycarbonate resin;
25 parts of acrylonitrile-butadiene-styrene copolymer;
2 parts of a compatilizer;
6 parts of a toughening agent;
10 parts of graphite powder;
3 parts of surface modified carbon fiber;
the compatilizer is maleic anhydride grafted ABS, the toughening agent is methyl methacrylate, and the metal wear-resistant powder is nano molybdenum disulfide.
The preparation steps of the surface modified carbon fiber are as follows:
(1) carbon fiber acid modification: cleaning and drying carbon fibers, stirring and soaking the carbon fibers for 1 hour by using a 1mol/L hydrochloric acid solution, carrying out suction filtration, then cleaning the carbon fibers by using deionized water, and drying the carbon fibers to obtain acid-modified carbon fibers;
(2) alkali modification of acid-modified carbon fiber: stirring and dipping the acid modified carbon fiber by using 1mol/L sodium hydroxide solution for 1h, carrying out suction filtration, washing by using deionized water, and drying to obtain alkali modified carbon fiber;
(3) alkali modified carbon fiber loaded metal wear-resistant powder: and (2) dispersing the metal wear-resistant powder in water to form a suspension, adding alkali modified carbon fiber, wherein the solid-to-liquid ratio of the alkali modified carbon fiber to the suspension is 5g/L, stirring uniformly, carrying out suction filtration, and drying to obtain the surface modified carbon fiber.
A method for preparing a caster composite, comprising the steps of:
step one, mixing and stirring polycarbonate resin, acrylonitrile-butadiene-styrene copolymer, compatilizer, toughening agent and graphite powder uniformly, adding surface modified carbon fiber, melting and dispersing uniformly to obtain a mixed material;
and step two, carrying out melt reaction on the mixed material, extruding and granulating to obtain the caster composite material.
The flow of the method for preparing the surface-modified carbon fiber and the caster composite material in this example is shown in fig. 1.
Example 2: the caster composite material is different from the caster composite material in example 1 in that the caster composite material comprises the following components in parts by weight:
45 parts of polycarbonate resin;
15 parts of acrylonitrile-butadiene-styrene copolymer;
3 parts of a compatilizer;
8 parts of a toughening agent;
14 parts of graphite powder;
4 parts of surface modified carbon fiber.
Example 3: the caster composite material is different from the caster composite material in example 1 in that the caster composite material comprises the following components in parts by weight:
40 parts of polycarbonate resin;
20 parts of acrylonitrile-butadiene-styrene copolymer;
4 parts of a compatilizer;
10 parts of a toughening agent;
20 parts of graphite powder;
5 parts of surface modified carbon fiber.
Example 4: the caster composite material is different from the caster composite material in example 1 in that the caster composite material comprises the following components in parts by weight:
37 parts of polycarbonate resin;
18 parts of acrylonitrile-butadiene-styrene copolymer;
4 parts of a compatilizer;
7 parts of a toughening agent;
12 parts of graphite powder;
5 parts of surface modified carbon fiber.
Example 5: the caster composite material is different from the caster composite material in example 1 in that the caster composite material comprises the following components in parts by weight:
42 parts of polycarbonate resin;
22 parts of acrylonitrile-butadiene-styrene copolymer;
4 parts of a compatilizer;
9 parts of a toughening agent;
18 parts of graphite powder;
5 parts of surface modified carbon fiber.
Example 6: a caster composite material, which is different from example 1 in that the metal wear-resistant powder is nano tungsten carbide.
Example 7: a caster composite material, which is different from the caster composite material in example 1 in that the metal wear-resistant powder is nano alumina.
Example 8: a caster composite material, which is different from example 1 in that the solid-to-liquid ratio of the suspension in the step (3) is 10 g/L.
Example 9: a caster composite material, which is different from example 1 in that the solid-to-liquid ratio of the suspension in the step (3) is 15 g/L.
Example 10: a caster composite material, which is different from example 1 in that the solid-to-liquid ratio of the alkali-modified carbon fiber to the suspension in the step (3) is 80 g/L.
Example 11: a caster composite material, which is different from example 1 in that the solid-to-liquid ratio of the alkali-modified carbon fiber to the suspension in the step (3) is 100 g/L.
Example 12: a caster composite, which differs from example 1 in that step (3) specifically comprises: and (2) dispersing the metal wear-resistant powder in water to form a suspension, adding alkali modified carbon fiber, wherein the solid-to-liquid ratio of the suspension is 5g/L, stirring uniformly, then carrying out ultrasonic treatment, wherein the power of the ultrasonic treatment is 150W, the treatment time is 25min, carrying out suction filtration, and drying to obtain the surface modified carbon fiber.
Example 13: a caster composite, which differs from example 1 in that step (3) specifically comprises: and (2) dispersing the metal wear-resistant powder in water to form a suspension, adding alkali modified carbon fiber, wherein the solid-to-liquid ratio of the suspension is 5g/L, stirring uniformly, then carrying out ultrasonic treatment, wherein the power of the ultrasonic treatment is 180W, the treatment time is 18min, carrying out suction filtration, and drying to obtain the surface modified carbon fiber.
Example 14: a caster composite, which differs from example 1 in that step (3) specifically comprises: and (2) dispersing the metal wear-resistant powder in water to form a suspension, adding alkali modified carbon fiber, wherein the solid-to-liquid ratio of the suspension is 5g/L, stirring uniformly, then carrying out ultrasonic treatment, wherein the power of the ultrasonic treatment is 200W, the treatment time is 15min, carrying out suction filtration, and drying to obtain the surface modified carbon fiber.
Example 15: the caster composite material is different from the caster composite material in the embodiment 1 in that the caster composite material further comprises aromatic polyamide fiber, the aromatic polyamide fiber is 4 parts by weight, and the step one specifically comprises the following steps: the polycarbonate resin, the acrylonitrile-butadiene-styrene copolymer, the compatilizer, the toughening agent and the graphite powder are mixed and stirred uniformly, and then the surface modified carbon fiber and the aromatic polyamide fiber are added, melted and dispersed uniformly to obtain a mixed material.
Example 16: a caster composite, which is different from example 15 in that the aromatic polyamide fiber is present in an amount of 6 parts by weight.
Example 17: a caster composite, which is different from example 15 in that the aromatic polyamide fiber is present in an amount of 8 parts by weight.
Example 18: the preparation method of the caster composite material is different from the embodiment 1 in that the first step specifically comprises the following steps: the preparation method comprises the steps of mixing and stirring the polycarbonate resin, the acrylonitrile-butadiene-styrene copolymer, the compatilizer, the toughening agent and the graphite powder uniformly, adding the surface modified carbon fiber and the aromatic polyamide fiber, heating and melting by adopting microwave at 220 ℃ for 20min, and dispersing uniformly to obtain a mixed material.
Example 19: the preparation method of the caster composite material is different from the embodiment 1 in that the first step specifically comprises the following steps: the preparation method comprises the steps of mixing and stirring the polycarbonate resin, the acrylonitrile-butadiene-styrene copolymer, the compatilizer, the toughening agent and the graphite powder uniformly, adding the surface modified carbon fiber and the aromatic polyamide fiber, heating and melting by adopting microwave at the heating temperature of 250 ℃ for 10min, and dispersing uniformly to obtain a mixed material.
Example 20: the preparation method of the caster composite material is different from the embodiment 1 in that the first step specifically comprises the following steps: the preparation method comprises the steps of mixing and stirring the polycarbonate resin, the acrylonitrile-butadiene-styrene copolymer, the compatilizer, the toughening agent and the graphite powder uniformly, adding the surface modified carbon fiber and the aromatic polyamide fiber, heating and melting by adopting microwave at the heating temperature of 240 ℃ for 14min, and dispersing uniformly to obtain a mixed material.
Example 21: a caster composite material different from example 1 in that the surface-modified carbon fiber was 4 parts by weight.
Example 22: a caster composite material, which is different from example 1 in that the surface-modified carbon fiber is 5 parts by weight.
Comparative example 1: the invention discloses an anti-aging conductive PC and ABS blended alloy as a composite material in Chinese invention patent with publication number CN 104629312A.
Comparative example 2: a caster composite material different from example 1 in that surface-modified carbon fibers were replaced with 4 parts by weight of an aromatic polyamide fiber.
Comparative example 3: a caster composite material, which is different from example 1 in that surface-modified carbon fibers were replaced with equal parts by weight of carbon fibers which were not surface-treated.
Comparative example 4: a caster composite material, which is different from example 1 in that the surface-modified carbon fiber is 1 part by weight.
Comparative example 5: a caster composite material different from example 1 in that the surface-modified carbon fiber was 7 parts by weight.
Comparative example 6: the preparation method of the caster composite material is different from the embodiment 1 in that the first step specifically comprises the following steps: the polycarbonate resin, the acrylonitrile-butadiene-styrene copolymer, the compatilizer, the toughening agent, the graphite powder and the surface modified carbon fiber are mixed, stirred uniformly, melted and dispersed uniformly to obtain a mixed material.
Comparative example 7: a method for preparing a caster composite, which is different from embodiment 18 in that the first step specifically comprises: the preparation method comprises the steps of mixing and stirring the polycarbonate resin, the acrylonitrile-butadiene-styrene copolymer, the compatilizer, the toughening agent and the graphite powder uniformly, adding the surface modified carbon fiber and the aromatic polyamide fiber, heating and melting by adopting microwave at the heating temperature of 270 ℃ for 14min, and dispersing uniformly to obtain a mixed material.
Performance testing
Test samples: the composite materials obtained in examples 1 to 22 were used as test samples 1 to 22, and the composite materials obtained in comparative examples 1 to 7 were used as control samples 1 to 7.
The test method comprises the following steps: the mass wear of test samples 1-22 and comparative examples 1-7 was tested according to the method specified in the GB/T3960-2016 Plastic sliding Friction wear test method. And the compressive strengths of test samples 1-22 and comparative examples 1-7 were tested using conventional test methods.
And (3) test results: the test results of the test samples 1 to 22 and the control samples 1 to 7 are shown in Table 1. It can be seen from table 1 that the mass wear of the test samples 1, 21, and 22 decreases with the increase of the addition amount of the surface-modified carbon fiber, and from the data of the control sample 2 and the test samples 15 to 17, the mass wear of the material decreases after the addition of the aramid fiber, and the mass wear and the friction coefficient decrease more greatly when the aramid fiber and the surface-modified carbon fiber are added than when either of the aramid fiber and the surface-modified carbon fiber is added alone, which indicates that the aramid fiber and the surface-modified carbon fiber have a certain synergistic effect on the improvement of the wear resistance of the material and the improvement of the compressive strength of the material.
It can be known from the test sample 1 and the comparison samples 3-5 that the mass wear and the friction coefficient of the material can be greatly reduced only after the surface of the carbon fiber is modified, and the content of the surface modified carbon fiber is too low, the wear resistance is not greatly improved, the distribution uniformity of the surface modified carbon fiber is influenced if the content of the surface modified carbon fiber is too high, and the wear resistance of the material is not improved but is reduced.
TABLE 1 test results of test samples 1-22 and control samples 1-7
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (4)
1. The caster composite material is characterized by comprising the following raw materials in parts by weight:
35-45 parts of polycarbonate resin;
15-25 parts of acrylonitrile-butadiene-styrene copolymer;
2-4 parts of a compatilizer;
6-10 parts of a toughening agent;
10-20 parts of graphite powder;
3-5 parts of surface modified carbon fiber;
the preparation steps of the surface modified carbon fiber are as follows:
(1) cleaning and drying carbon fibers, stirring and dipping the carbon fibers by using a hydrochloric acid solution, performing suction filtration, cleaning the carbon fibers by using deionized water, and drying the carbon fibers to obtain acid-modified carbon fibers;
(2) stirring and dipping acid modified carbon fiber with a potassium hydroxide solution, carrying out suction filtration, washing with deionized water, and drying to obtain alkali modified carbon fiber;
(3) dispersing metal wear-resistant powder in water to form a suspension, adding alkali modified carbon fiber, wherein the solid-to-liquid ratio of the suspension is 5-15g/L, and the solid-to-liquid ratio of the alkali modified carbon fiber to the suspension is 50-100g/L, stirring uniformly, performing suction filtration, and drying to obtain surface modified carbon fiber;
the metal wear-resistant powder is selected from any one of nano molybdenum disulfide, nano tungsten carbide and nano aluminum oxide;
the preparation method of the caster composite material comprises the following steps:
step one, mixing and stirring polycarbonate resin, acrylonitrile-butadiene-styrene copolymer, compatilizer, toughening agent and graphite powder uniformly, adding surface modified carbon fiber, melting and dispersing uniformly to obtain a mixed material;
step two, carrying out melt reaction on the mixed material, extruding and granulating to obtain the caster composite material;
in the first step, the melting is performed by microwave heating, the heating temperature is 220-250 ℃, and the heating time is 10-20 min.
2. The caster composite material as claimed in claim 1, wherein the ultrasonic treatment is performed after the uniform stirring in step (3), the power of the ultrasonic treatment is 150-200W, and the treatment time is 15-25 min.
3. The caster composite as claimed in claim 1, wherein the raw material further comprises aromatic polyamide fiber, and the aromatic polyamide fiber is present in an amount of 4 to 8 parts by weight.
4. The method of making a caster composite of claim 1, comprising the steps of:
step one, mixing and stirring polycarbonate resin, acrylonitrile-butadiene-styrene copolymer, compatilizer, toughening agent and graphite powder uniformly, adding surface modified carbon fiber, melting and dispersing uniformly to obtain a mixed material;
step two, carrying out melt reaction on the mixed material, extruding and granulating to obtain the caster composite material;
in the first step, the melting is performed by microwave heating, the heating temperature is 220-250 ℃, and the heating time is 10-20 min.
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Denomination of invention: A composite material for casters and its preparation method Granted publication date: 20210427 Pledgee: Bank of China Limited Xiamen Haicang sub branch Pledgor: XIAMEN ZHONG CHEN YUAN TECHNOLOGY Co.,Ltd. Registration number: Y2024980012284 |