CN112759846A - Graphene modified polymer composite material for bearing seat and preparation method thereof - Google Patents

Graphene modified polymer composite material for bearing seat and preparation method thereof Download PDF

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CN112759846A
CN112759846A CN202011579603.3A CN202011579603A CN112759846A CN 112759846 A CN112759846 A CN 112759846A CN 202011579603 A CN202011579603 A CN 202011579603A CN 112759846 A CN112759846 A CN 112759846A
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graphene
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宗旭
田振宇
吴昊
谢卫宏
刘中车
郑雅轩
瞿研
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Nantong Sixth Element Material Technology Co ltd
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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
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other olefins
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
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Abstract

The invention provides a graphene modified polymer composite material for a bearing seat, which is prepared from the following raw materials in parts by weight: 45-55 parts of polypropylene, 12-20 parts of high-density polyethylene, 10-30 parts of alkali-free glass fiber, 0.1-1 part of graphene, 2-6 parts of toughening agent, 2-6 parts of grafting agent, 0.1-0.5 part of antioxidant, 0.1-0.5 part of anti-ultraviolet agent and 3.5-4.4 parts of lubricant; the total is 100 parts. The invention also provides a preparation method of the composition. The graphene modified polymer composite material has good comprehensive performance, and has good advantages and application prospects. The carrier roller bearing seat made of the graphene modified polymer composite material has the advantages of high strength of engineering plastic level, low manufacturing cost, easiness in injection molding, light weight, low requirement on an extruder, certain wear resistance and capability of meeting various size requirements through injection molding.

Description

Graphene modified polymer composite material for bearing seat and preparation method thereof
Technical Field
The invention belongs to the technical field of high polymer material processing, and particularly relates to a graphene modified high polymer composite material for a bearing seat and a preparation method thereof.
Background
The belt conveyor is widely applied to industrial production and life of people. Wherein the bearing block is one of the important components of an idler in a belt conveyor. In the current market, bearing seats of carrier rollers are mostly made of steel materials, and a plurality of problems exist in the using process, firstly, the steel bearing seats are limited by the size, in most cases, the types and the sizes of the carrier roller bearing seats are determined according to the shaft diameter (or the inner diameter of the carrier roller bearing), and a plurality of non-standard carrier roller bearing seats have no spot goods in the country due to various size requirements in the market; secondly, the steel carrier roller bearing seat is easy to be chemically corroded, so that the service life of the steel carrier roller bearing seat is shortened, the density of steel is high, the weight of the steel is heavy, and a large amount of time and cost are needed to be spent on ordinary maintenance. Compared with the prior art, the carrier roller bearing seat made of high polymer materials has the advantages of excellent processing performance, capability of meeting the requirements of various sizes, excellent chemical corrosion resistance, light weight, impact resistance and the like, and becomes a new-generation high-cost performance product for replacing a metal bearing seat in recent years.
CN107418045B discloses a "graphene modified polypropylene machine with high strength and high rigidity and a preparation method thereof" which uses homo-polypropylene as a material matrix, and disperses a plurality of auxiliary agents such as graphene, alkali-free glass fiber, enzymatic lignin, compatilizer and the like in matrix resin through a twin screw; the modified homo-polypropylene is used as matrix resin, the addition amount of the graphene is very high (15-20 parts), and the cost is very high; CN106867076A discloses a preparation method of a mining graphene-reinforced ultra-high molecular weight polyethylene double-resistant pipe, which utilizes ultra-high molecular weight polyethylene as a matrix resin, and simultaneously disperses graphene, an antistatic agent and a flame retardant in the matrix, wherein the ultra-high molecular weight polyethylene has high melt viscosity due to large molecular weight (300-1000 ten thousand), so that the processing is difficult, the process is complex, the addition amount of graphene is large (3-5 wt%), the cost is high, and the tensile strength of the corresponding graphene pipe is reduced by 20-30% compared with that of pure ultra-high molecular weight polyethylene, and the electric conduction and the reinforcing effect of the graphene in a high molecular weight polyethylene system are not highlighted.
However, in order to meet the basic requirement of material strength, most of the conventional high polymer material bearing seats are made of engineering plastics, so that the cost is high, the production of injection molding is not facilitated, and meanwhile, because the strength is high, the strength is difficult to be improved even through modification, and the strength of the material is improved on the basis of modification by using general plastics, so that the material is high in strength, and the material has the advantages of easiness in processing, low cost and the like.
Disclosure of Invention
In order to solve the problems in the prior art and overcome the defects of the conventional bearing seat on the market, the invention provides a preparation method of a graphene modified polymer composite material for the bearing seat, the conventional polypropylene and high-density polyethylene are mixed to be used as matrix resin, and higher mechanical strength can be obtained under the condition of less addition (0.1-1 part) of graphene. Due to the addition of the graphene, the product with the general plastic as the matrix resin has the advantage of high strength of engineering plastic grade, and meanwhile, the processing technology is simple, the injection molding is easy, the manufacturing cost is low, and higher economic benefits can be brought.
In order to realize the technical purpose of the invention, the technical scheme of the invention is as follows:
the graphene modified polymer composite material for the bearing seat is prepared from the following raw materials in parts by weight:
Figure BDA0002864493940000021
the conventional high molecular carrier roller bearing seat in the market is mostly made of engineering plastics, the cost of raw materials is high, and the requirement on processing equipment is high.
The material of the carrier roller bearing seat is required to have the characteristics of high strength, corrosion resistance, light weight, long service life and the like, so that the pure polymer material has the characteristics of low cost, low density and the like, but cannot meet the requirements of the material of the carrier roller bearing seat in the aspects of mechanical strength, weather resistance and the like, and other auxiliary materials are required to be added for composite modification so as to improve the properties of the material of the carrier roller bearing seat, such as mechanical strength, weather resistance and the like.
Preferably, the alkali-free glass fiber accounts for 10-25 parts by weight.
Preferably, the graphene modified polymer composite material for the bearing seat is prepared from the following raw materials in parts by weight: 53 parts of polypropylene, 17 parts of high-density polyethylene, 15 parts of alkali-free glass fiber, 0.5 part of graphene, 5 parts of toughening agent, 5 parts of grafting agent, 0.5 part of antioxidant, 0.5 part of anti-ultraviolet agent and 3.5 parts of lubricant, wherein the total is 100 parts.
Preferably, the polypropylene is copolymerized polypropylene, and the molecular weight is 8-15 ten thousand; the high-density polyethylene is 100-grade polyethylene and has molecular weight of 4-30 ten thousand.
Preferably, the alkali-free glass fiber has a diameter in the range of 8 to 14 μm.
Preferably, the graphene is BET ≥ 505m2G, D50 is less than or equal to 27 mu m, and the mass fraction of oxygen<1％。
Preferably, the graphene is an enhanced graphene product manufactured by Heizhou sixth-element material science and technology Limited, and the product model is SE 1430.
Preferably, the toughening agent is one or more of POE, SBS and SEBS; and/or
The grafting agent is one or more of PP grafted maleic anhydride and PE grafted maleic anhydride; and/or
The antioxidant is one or more of antioxidant 1010 and antioxidant 168; and/or
The anti-ultraviolet agent is one or more of UV531 and UV 770; and/or
The lubricant is one or more of erucamide, zinc stearate and calcium stearate.
The preparation method of the graphene modified polymer composite material for the bearing seat comprises the following steps: mixing and stirring the polypropylene and the high-density polyethylene according to the formula ratio to obtain granules, mixing and stirring the graphene according to the formula ratio with the toughening agent, the grafting agent, the antioxidant, the uvioresistant agent and the lubricant to obtain powder, simultaneously adding the granules and the powder into a double-screw extruder for extrusion, and simultaneously adding the alkali-free glass fiber according to the formula ratio into a fiber adding port at the fourth section of the double-screw extruder to obtain the graphene modified polymer composite material for the bearing block.
Preferably, the parameters of the twin-screw extrusion are set as follows: the temperatures from the first section to the tenth section are respectively 160-.
The invention has the following beneficial effects:
the carrier roller bearing seat produced by the graphene modified polymer composite material prepared by the method can be used in the scenes of mines, chemical engineering, wharfs, salt yards and the like except coal mines.
The graphene modified polymer composite material obtained by the formula and the process is subjected to performance detection, and the obtained main performance data are as follows, so that the basic requirements for manufacturing a carrier roller bearing seat product are met: the tensile strength is more than or equal to 55MPa, the bending strength is more than or equal to 65MPa, the bending modulus is more than or equal to 3500MPa, and the density is less than or equal to 1.3g/cm3Shore Hardness (Shore Hardness) is not less than 60D, and the notched impact strength of the cantilever beam is not less than 27KJ/m2。
The graphene modified polymer composite material has good comprehensive performance, and has better advantages and application prospects compared with the traditional steel carrier roller bearing seat and engineering plastic base bearing seat in the market. The carrier roller bearing seat made of the graphene modified polymer composite material has the advantages of high strength of engineering plastic level, low manufacturing cost, easiness in injection molding, light weight, low requirement on an extruder, certain wear resistance and capability of meeting various size requirements through injection molding.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a diagram of graphene modified polymer material particles for a bearing seat and a bearing seat finished product.
Detailed Description
The following examples are given to facilitate a better understanding of the invention, but do not limit the invention. The experimental procedures in the following examples are conventional unless otherwise specified. The test materials used in the following examples were purchased from conventional biochemicals, unless otherwise specified. The quantitative tests in the following examples, all set up three replicates and the results averaged.
The graphene modified polymer composite material for the bearing seat comprises the following raw material components in parts by weight:
Figure BDA0002864493940000041
Figure BDA0002864493940000051
wherein:
the polypropylene is copolymerized polypropylene, and the molecular weight is 8-15 ten thousand. The copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The high-density polyethylene is 100-grade polyethylene and has molecular weight of 4-30 ten thousand.
The alkali-free glass fiber refers to glass fiber after surface treatment, is obtained by direct purchase, and has the diameter range of 8-14 microns, preferably 13-14 microns;
the graphene is characterized in that BET is more than or equal to 505m2G, D50 is less than or equal to 27 mu m, and the mass fraction of oxygen<1 percent, preferably 0.3 to 0.7 part of enhanced graphene product (product model: SE1430) produced by Hexagon sixth element material science and technology Limited;
the toughening agent is selected from one or more of POE, SBS and SEBS;
the grafting agent is one or more of PP grafted maleic anhydride and PE grafted maleic anhydride;
the antioxidant is one or more of an antioxidant 1010 (with the chemical name of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester) and an antioxidant 168 (with the chemical name of tri [2, 4-di-tert-butylphenyl ] phosphite);
the anti-ultraviolet agent is selected from one or more of UV531 and UV 770;
the lubricant is one or more selected from erucamide, zinc stearate and calcium stearate.
In the present application, one or more of the expressions "· · appear in various places", and when two or more of them are selected, they can be mixed in any proportion to meet the use requirements.
The preparation method of the modified polymer composite material for the bearing seat comprises the following steps:
the resin (polypropylene and high-density polyethylene) in the formula is accurately weighed and placed in a high-speed stirrer to be mixed and stirred to be used as granules for 10-30min, the graphene and other fillers (a toughening agent, a grafting agent, an antioxidant, an anti-ultraviolet agent and a lubricant) are accurately weighed and placed in the high-speed stirrer to be mixed and stirred to be used as powder for 10-30min, then the granules and the powder are simultaneously and accurately added into a double-screw extruder through a hopper through weight loss weighing to be extruded, meanwhile, a certain number of alkali-free glass fibers are added into a fiber adding port in the operation process of the double-screw extruder according to the formula amount, the feeding speed is adjusted to 30-50rpm, and the rotating speed of a main machine is adjusted to 300-500rpm, so that the content of the alkali-free glass fibers of the final particles meets the adding amount in the formula. Finally, the modified polymer composite material for the bearing is prepared.
Wherein the parameters of the twin-screw extrusion are set as follows: the temperatures from the first section to the tenth section are respectively 160-.
The optimization experiment of the application is as follows:
1. although the polypropylene resin matrix is selected independently, the advantage of high strength is achieved, but the high-strength resin has the property of high melt index (not less than 15g/10min), and is not favorable for injection molding in the production process; although the high-density polyethylene resin matrix is independently selected, the high-density polyethylene resin matrix has a lower melt index (less than or equal to 3g/10min) and is beneficial to processing and forming, but a product is easy to generate weld marks due to the low melt index in the injection molding process, and meanwhile, the resin has lower basic strength and larger size shrinkage after forming and is greatly limited; in the invention, the polypropylene and the high-density polyethylene are selected and combined according to the proportion of the invention, so that the polypropylene composite material has the advantages of high strength and stable molding size (the shrinkage rate is less than or equal to 1 percent), and is beneficial to processing and molding.
2. As is well known, due to the size of particles, the particles and powder have non-uniform phenomenon in the mixing process, which can directly cause the non-uniformity of extruded particles, and meanwhile, a certain amount of graphene exists in the formula, and if the graphene is directly mixed, the dispersibility of the graphene is poor, so that a good reinforcing effect cannot be achieved; in order to solve the problem of product uniformity and embody the advantage of graphene enhancement effect, the granular material and the granular material are mixed, the graphene and the powder are mixed to increase the dispersibility of the graphene, the raw material proportioning blanking is accurately controlled by a weightlessness scale in the production process, the uniformity of extruded particles is further improved, and the enhancement effect of the graphene on the matrix resin is improved (for example, the mechanical property of separated blanking is improved by more than or equal to 10 percent compared with that of direct blending blanking).
3. The grafting agent has the function of increasing the interface compatibility between the matrix resin and inorganic materials (such as glass fibers) and has great help to improve the mechanical property of the material (such as the condition that the mechanical property can be improved by more than or equal to 20 percent by adding 5 parts of the grafting agent).
4. The glass fiber is often used for improving the mechanical strength of the high polymer material, and the addition of the graphene can reduce the addition amount of the alkali-free glass fiber and improve the mechanical strength of the high polymer composite material; the toughening agent and the lubricant in the formula have positive effects on the dimensional stability of the material (the shrinkage can be less than or equal to 0.5%) while improving the toughness of the polymer composite material.
Example 1
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
45 parts of polypropylene, 15 parts of high-density polyethylene, 25 parts of alkali-free glass fiber, 0.1 part of graphene, 6 parts of toughening agent, 4 parts of grafting agent, 0.1 part of antioxidant, 0.4 part of anti-ultraviolet agent and 4.4 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 8 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 14 micrometers;
BET of graphene is 510m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein D50 is 27 mu m, and the mass fraction of oxygen is 0.8%;
the toughening agent is SEBS;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 531;
the lubricant is: and (3) zinc stearate.
The preparation method of the modified polymer composite material for the bearing of the embodiment is as follows:
accurately weighing the resins (polypropylene and high-density polyethylene) in the formula, putting the resins in a high-speed stirrer for mixing and stirring for 30min, accurately weighing the graphene and other fillers (a toughening agent, a grafting agent, an antioxidant, an anti-ultraviolet agent and a lubricant), putting the graphene and the other fillers in the high-speed stirrer for mixing and stirring for 30min, then simultaneously and accurately adding the granules and the powder into a double-screw extruder for extrusion through a hopper by a weightlessness scale, simultaneously adding a certain number of alkali-free glass fibers in the formula amount at a fiber adding port of the double-screw extruder, and adjusting the feeding rate and the rotating speed of a main machine to ensure that the content of the alkali-free glass fibers in the final particles meets the addition amount in the formula. Finally, the modified polymer composite material for the bearing is prepared.
Wherein the parameters of the twin-screw extrusion are set as follows: the temperatures of the first stage to the tenth stage were 180 ℃, 190 ℃, 210 ℃, 220 ℃, 240 ℃ for the head temperature, 400rpm for the main machine, and 40rpm for the feeding rate, respectively. The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Example 2
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
48 parts of polypropylene, 17 parts of high-density polyethylene, 20 parts of alkali-free glass fiber, 0.3 part of graphene, 4 parts of toughening agent, 6 parts of grafting agent, 0.2 part of antioxidant, 0.5 part of anti-ultraviolet agent and 4 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 10 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 4 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
BET of graphene is 510m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein D50 is 27 mu m, and the mass fraction of oxygen is 0.8%;
the toughening agent is POE;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 531;
the lubricant is: calcium stearate.
The preparation method of the modified polymer composite material for bearings of this example is the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Example 3
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
50 parts of polypropylene, 20 parts of high-density polyethylene, 18 parts of alkali-free glass fiber, 0.5 part of graphene, 4 parts of toughening agent, 3 parts of grafting agent, 0.5 part of antioxidant, 0.1 part of anti-ultraviolet agent and 3.9 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 10 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 30 ten thousand;
the diameter of the alkali-free glass fiber is 14 micrometers;
BET of graphene is 530m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein the D50 is 24 mu m, the mass fraction of oxygen is 0.75%;
the toughening agent is SBS;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 168;
the uvioresistant agent is: UV 531;
the lubricant is: erucamide.
The preparation method of the modified polymer composite material for bearings of this example is the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Example 4
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
55 parts of polypropylene, 18 parts of high-density polyethylene, 15 parts of alkali-free glass fiber, 0.5 part of graphene, 5 parts of toughening agent, 2 parts of grafting agent, 0.3 part of antioxidant, 0.4 part of anti-ultraviolet agent and 3.8 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 8 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 14 micrometers;
BET of graphene is 530m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein the D50 is 24 mu m, the mass fraction of oxygen is 0.75%;
the toughening agent is POE;
the grafting agent is: grafting maleic anhydride on PE;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 770;
the lubricant is: erucamide.
The preparation method of the modified polymer composite material for bearings of this example is the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Example 5
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
53 parts of polypropylene, 17 parts of high-density polyethylene, 15 parts of alkali-free glass fiber, 0.5 part of graphene, 5 parts of toughening agent, 5 parts of grafting agent, 0.5 part of antioxidant, 0.5 part of anti-ultraviolet agent and 3.5 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 10 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
BET of graphene is 530m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein the D50 is 24 mu m, the mass fraction of oxygen is 0.75%;
the toughening agent is POE;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 168;
the uvioresistant agent is: UV 770;
the lubricant is: erucamide.
The preparation method of the modified polymer composite material for bearings of this example is the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Example 6
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
46 parts of polypropylene, 16 parts of high-density polyethylene, 25 parts of alkali-free glass fiber, 1 part of graphene, 2 parts of toughening agent, 6 parts of grafting agent, 0.5 part of antioxidant, 0.1 part of anti-ultraviolet agent and 3.4 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 8 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
BET of graphene is 510m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein D50 is 27 mu m, and the mass fraction of oxygen is 0.8%;
the toughening agent is SEBS;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 168;
the uvioresistant agent is: UV 770;
the lubricant is: and (3) zinc stearate.
The preparation method of the modified polymer composite material for bearings of this example is the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Example 7
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
50 parts of polypropylene, 18 parts of high-density polyethylene, 20 parts of alkali-free glass fiber, 0.1 part of graphene, 3 parts of toughening agent, 4 parts of grafting agent, 0.2 part of antioxidant, 0.4 part of anti-ultraviolet agent and 4.3 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 13 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 15 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
BET of graphene is 530m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein the D50 is 24 mu m, the mass fraction of oxygen is 0.75%;
the toughening agent is POE;
the grafting agent is: grafting maleic anhydride on PE;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 770;
the lubricant is: calcium stearate.
The preparation method of the modified polymer composite material for bearings of this example is the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Example 8
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
55 parts of polypropylene, 20 parts of high-density polyethylene, 10 parts of alkali-free glass fiber, 0.3 part of graphene, 6 parts of toughening agent, 4 parts of grafting agent, 0.1 part of antioxidant, 0.3 part of anti-ultraviolet agent and 4.3 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: co-polypropylene, molecular weight 15 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 15 ten thousand;
the diameter of the alkali-free glass fiber is 14 micrometers;
of grapheneBET of 510m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein D50 is 27 mu m, and the mass fraction of oxygen is 0.8%;
the toughening agent is POE;
the grafting agent is: grafting maleic anhydride on PE;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 531;
the lubricant is: erucamide.
The preparation method of the modified polymer composite material for bearings of this example is the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Example 9
The modified polymer composite material for the bearing comprises the following raw material components in parts by weight:
48 parts of polypropylene, 12 parts of high-density polyethylene, 30 parts of alkali-free glass fiber, 0.4 part of graphene, 2 parts of toughening agent, 3 parts of grafting agent, 0.3 part of antioxidant, 0.4 part of anti-ultraviolet agent and 3.9 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 13 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 15 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
BET of graphene is 510m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein D50 is 27 mu m, and the mass fraction of oxygen is 0.8%;
the toughening agent is SBS;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 531;
the lubricant is: calcium stearate.
The preparation method of the modified polymer composite material for bearings of this example is the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Comparative example 1 (without graphene)
The modified polymer composite material for the bearing of the comparative example comprises the following raw material components in parts by weight:
40 parts of polypropylene, 5 parts of high-density polyethylene, 40 parts of alkali-free glass fiber, 5 parts of toughening agent, 5 parts of grafting agent, 0.3 part of antioxidant, 0.4 part of anti-ultraviolet agent and 4.3 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 8 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
the toughening agent is POE;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 531;
the lubricant is: calcium stearate.
The preparation method of the modified polymer composite material for bearings of this comparative example was the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Comparative example 2 (without addition of grafting agent)
The modified polymer composite material for the bearing of the comparative example comprises the following raw material components in parts by weight:
55 parts of polypropylene, 20 parts of high-density polyethylene, 15 parts of alkali-free glass fiber, 0.5 part of graphene, 5 parts of toughening agent, 0.5 part of antioxidant, 0.5 part of anti-ultraviolet agent and 3.5 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 10 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
BET of graphene is 510m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein D50 is 27 mu m, and the mass fraction of oxygen is 0.8%;
the toughening agent is POE;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 168;
the uvioresistant agent is: UV 770;
the lubricant is: erucamide.
The preparation method of the modified polymer composite material for bearings of this comparative example was the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Comparative example 3 (without toughening agent)
The modified polymer composite material for the bearing of the comparative example comprises the following raw material components in parts by weight:
42 parts of polypropylene, 8 parts of high-density polyethylene, 40 parts of alkali-free glass fiber, 0.5 part of graphene, 5 parts of grafting agent, 0.5 part of antioxidant, 0.5 part of anti-ultraviolet agent and 3.5 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 10 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
BET of graphene is 510m2G, D50 is 27 μm, oxygenThe mass fraction of the graphene is 0.8%, and an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology Limited company is selected;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 531;
the lubricant is: and (3) zinc stearate.
The preparation method of the modified polymer composite material for bearings of this comparative example was the same as that of example 1.
The pellets were pelletized by twin screw extrusion and the resulting pellets were sampled to test performance.
Comparative example 4 (simple blending charge)
The modified polymer composite material for the bearing of the comparative example comprises the following raw material components in parts by weight:
53 parts of polypropylene, 17 parts of high-density polyethylene, 15 parts of alkali-free glass fiber, 0.5 part of graphene, 5 parts of toughening agent, 5 parts of grafting agent, 0.5 part of antioxidant, 0.5 part of anti-ultraviolet agent and 3.5 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 10 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 13 micrometers;
BET of graphene is 510m2The preparation method comprises the following steps of (1) selecting an enhanced graphene product (product model: SE1430) produced by Heizhou sixth-element material science and technology limited company, wherein D50 is 27 mu m, and the mass fraction of oxygen is 0.8%;
the toughening agent is POE;
the grafting agent is: grafting PP with maleic anhydride;
the antioxidant is as follows: an antioxidant 168;
the uvioresistant agent is: UV 770;
the lubricant is: erucamide.
This comparative example differs from the preparation method in example 1 in that: the resin (polypropylene and high-density polyethylene), graphene and other fillers (toughening agent, grafting agent, antioxidant, uvioresistant agent and lubricant) in the formula are accurately weighed and put together in a high-speed stirrer to be mixed and stirred for 30min, and then the raw materials are accurately added into a double-screw extruder through a hopper through a weightlessness scale to be extruded. The other steps and parameters were the same as those in the preparation method of example 1.
Comparative example 5 (graphene from other manufacturers)
The modified polymer composite material for the bearing of the comparative example comprises the following raw material components in parts by weight:
55 parts of polypropylene, 18 parts of high-density polyethylene, 15 parts of alkali-free glass fiber, 0.5 part of graphene, 5 parts of toughening agent, 2 parts of grafting agent, 0.3 part of antioxidant, 0.4 part of anti-ultraviolet agent and 3.8 parts of lubricant, wherein the total is 100 parts.
Wherein the specification of the polypropylene is as follows: the molecular weight of the copolymerized polypropylene is 8 ten thousand; the copolymerized polypropylene is formed by copolymerizing propylene and ethylene, wherein the content of the propylene is 97 percent, and the content of the ethylene is 3 percent.
The specifications of the high density polyethylene are: 100 grade polyethylene, molecular weight 10 ten thousand;
the diameter of the alkali-free glass fiber is 14 micrometers;
BET of graphene is 530m224 μm of D50, 0.75% of oxygen by mass, provided by Changzhou Xiancheng nano-meter;
the toughening agent is POE;
the grafting agent is: grafting maleic anhydride on PE;
the antioxidant is as follows: an antioxidant 1010;
the uvioresistant agent is: UV 770;
the lubricant is: erucamide.
The preparation method of the modified polymer composite material for bearings of this comparative example was the same as that of example 1.
The performance of the idler chocks prepared in examples 1-9 and comparative examples 1-5 were tested using the following test methods and standards, respectively:
tensile strength: GB/T1040.1-2006.
Bending strength: GB/T9341-2008.
Flexural modulus: GB/T9341-2008.
Notched izod impact strength: GB/T21189-2007.
Density: GB/T1033.1-2008.
Shore hardness: GB/T2411-2008.
Dimensional stability (% shrinkage): GB/T15585-1995.
The results are shown in Table 1 (the values in Table 1 are the average values obtained by testing three samples of the same batch).
TABLE 1 test results for Performance of examples and comparative examples
Figure BDA0002864493940000181
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a graphite alkene modified polymer combined material for bearing frame which characterized in that: the graphene modified polymer composite material for the bearing seat is prepared from the following raw materials in parts by weight:
Figure FDA0002864493930000011
2. the graphene-modified polymer composite material for the bearing seat according to claim 1, wherein: the weight portion of the alkali-free glass fiber is 10-25.
3. The graphene-modified polymer composite material for the bearing seat according to claim 1, wherein: the graphene modified polymer composite material for the bearing seat is prepared from the following raw materials in parts by weight: 53 parts of polypropylene, 17 parts of high-density polyethylene, 15 parts of alkali-free glass fiber, 0.5 part of graphene, 5 parts of toughening agent, 5 parts of grafting agent, 0.5 part of antioxidant, 0.5 part of anti-ultraviolet agent and 3.5 parts of lubricant, wherein the total is 100 parts.
4. The graphene-modified polymer composite material for the bearing seat according to any one of claims 1 to 3, wherein: the polypropylene is copolymerized polypropylene, and the molecular weight is 8-15 ten thousand; the high-density polyethylene is 100-grade polyethylene and has molecular weight of 4-30 ten thousand.
5. The graphene-modified polymer composite material for the bearing seat according to any one of claims 1 to 3, wherein: the diameter range of the alkali-free glass fiber is 8-14 microns.
6. The graphene-modified polymer composite material for the bearing seat according to any one of claims 1 to 3, wherein: the graphene is BET (BET) not less than 505m2G, D50 is less than or equal to 27 mu m, and the mass fraction of oxygen<1％。
7. The graphene-modified polymer composite material for the bearing seat according to claim 6, wherein: the graphene is an enhanced graphene product produced by Heizhou sixth-element material science and technology limited company, and has the product model: SE 1430.
8. The graphene-modified polymer composite material for the bearing seat according to any one of claims 1 to 7, wherein: the toughening agent is one or more of POE, SBS and SEBS; and/or
The grafting agent is one or more of PP grafted maleic anhydride and PE grafted maleic anhydride; and/or
The antioxidant is one or more of antioxidant 1010 and antioxidant 168; and/or
The anti-ultraviolet agent is one or more of UV531 and UV 770; and/or
The lubricant is one or more of erucamide, zinc stearate and calcium stearate.
9. The method for preparing the graphene-modified polymer composite material for the bearing seat as claimed in any one of claims 1 to 8, wherein: the preparation method comprises the following steps: mixing and stirring the polypropylene and the high-density polyethylene according to the formula ratio to obtain granules, mixing and stirring the graphene according to the formula ratio with the toughening agent, the grafting agent, the antioxidant, the uvioresistant agent and the lubricant to obtain powder, simultaneously adding the granules and the powder into a double-screw extruder for extrusion, and simultaneously adding the alkali-free glass fiber according to the formula ratio into a fiber adding port at the fourth section of the double-screw extruder to obtain the graphene modified polymer composite material for the bearing block.
10. The method for preparing the graphene-modified polymer composite material for the bearing seat according to claim 9, wherein the graphene-modified polymer composite material comprises the following steps: the parameters of the twin-screw extrusion are set as follows: the temperatures from the first section to the tenth section are respectively 160-.
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