CN106432873A - Ultra-high molecular weight polyethylene compound material and preparation method thereof - Google Patents
Ultra-high molecular weight polyethylene compound material and preparation method thereof Download PDFInfo
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- CN106432873A CN106432873A CN201610851169.7A CN201610851169A CN106432873A CN 106432873 A CN106432873 A CN 106432873A CN 201610851169 A CN201610851169 A CN 201610851169A CN 106432873 A CN106432873 A CN 106432873A
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- 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
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/203—Solid polymers with solid and/or liquid additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
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Abstract
The invention provides an ultra-high molecular weight polyethylene compound material which comprises a product acquired by compounding graphene and ultra-high molecular weight polyethylene under high-speed airflow impact, wherein the weight percent of graphene in the compound material is 0.1-0.5%. The invention also provides a preparation method for the ultra-high molecular weight polyethylene compound material. The ultra-high molecular weight polyethylene compound material provided by the invention has excellent friction and wearing resistance. Compared with a pure ultra-high molecular weight polyethylene material, the ultra-high molecular weight polyethylene compound material has the advantages that the wearing rate is reduced by 55% and the friction coefficient is reduced by 22.1%. According to the preparation method provided by the invention, no organic solvent is adopted, the environment is prevented from being damaged, no any processing agent is added, the technique is simple and the cost is low.
Description
Technical field
The present invention relates to polymeric material field, particularly a kind of ultra high molecular polyethylene composite and its preparation side
Method.
Background technology
Ultra-high molecular weight polyethylene (Ultra-high molecular weight polyethylene, UHMWPE) is one
Plant the high molecular polymer of line style, its molecular weight is generally 1 × 106More than g/mol.Great molecular weight leads to intermolecular strong
Mutual winding, bring excellent mechanical property so that it to possess good greasy property, impact resistance, wear-resistant, chemically-resistant rotten
The performances such as erosion.But compared with Other Engineering plastics, its friction resistant wear resistance is poor, thus have impact on its using effect and application
Scope, generally makes UHMWPE become composite to improve its performance using interpolation filler at present.
When composite is prepared for matrix with UHMWPE, mix generally by by UHMWPE, filler and processing aid,
Through hot-forming formation composite.It is related in this preparation process add more processing aid, production and processing is relatively costly,
Preparation process is complicated.
Content of the invention
It is an object of the invention to provide a kind of anti-wear performance is good, preparation process is simple ultra high molecular polyethylene composite
And preparation method thereof.
One aspect of the present invention provides a kind of ultra-high molecular weight polyethylene composite material, and it is included by Graphene and supra polymer
Weight northylen compound product obtaining under high velocity air impact；Wherein, in described composite, the percent mass of Graphene contains
Measure as 0.1-0.5%.
Another aspect of the present invention provides a kind of method preparing above-mentioned composite, comprises the steps：By Graphene with
Compound under high velocity air impact after ultra-high molecular weight polyethylene mixing, obtain composite.
The ultra-high molecular weight polyethylene composite material of the present invention has excellent wear resistance, compares pure superelevation
Molecular weight polyethylene material, wear rate reduces 55%, and coefficient of friction reduces 22.1%.The superhigh molecular weight polyethylene of the present invention
The preparation method of alkene composite, using the preparation of high velocity air impact granule hybrid system, this system utilizes high-speed motion
Rotor produces high velocity air to drive granule to do high-speed motion so that particle surface activation, can make Graphene in the short time
Parcel Ultra high molecular weight polyethylene particles, thus form the excellent ultra-high molecular weight polyethylene composite material of abrasion resistance properties.This
The preparation method of invention need not adopt organic solvent, and environment will not be worked the mischief, without any processing aid of interpolation, work
Skill is simple, low cost.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from reference to the description to embodiment for the accompanying drawings below
Substantially and easy to understand, wherein：
Fig. 1 is the SEM figure of the ultra-high molecular weight polyethylene composite material of preparation in the embodiment of the present invention 2.
Fig. 2 is the SEM figure of the ultra-high molecular weight polyethylene composite material of preparation in the embodiment of the present invention 3.
Fig. 3 is the SEM figure of the ultra-high molecular weight polyethylene composite material of preparation in the embodiment of the present invention 4.
Fig. 4 is the SEM figure of the ultra-high molecular weight polyethylene composite material of preparation in the embodiment of the present invention 5.
Fig. 5 is the SEM figure of the ultra-high molecular weight polyethylene composite material of preparation in the embodiment of the present invention 6.
Fig. 6 is the ultra-high molecular weight polyethylene composite material friction coefficient curve figure of embodiment 1-6 preparation.
Fig. 7 is the ultra-high molecular weight polyethylene composite material wear rate curve chart of embodiment 1-6 preparation.
Specific embodiment
The present invention provides a kind of ultra-high molecular weight polyethylene composite material, and it is included by Graphene and superhigh molecular weight polyethylene
Alkene compound product obtaining under high velocity air impact；Wherein, in described composite, the weight/mass percentage composition of Graphene is
0.1-0.5%.
Graphene has good mechanical performance and self-lubricating property, and Graphene is used for ultra-high molecular weight polyethylene is entered
Row is filling-modified, and it is wrapped in the surface energy of Ultra high molecular weight polyethylene particles and hinders, changes and reflect the fine fisssure that abrasion produces
The extension of stricture of vagina, thus effectively slowing down the formation of polymer grinding, and reduces the size of polymer grinding.Graphene institute is special simultaneously
Some interlayer structures are susceptible to shear thus forming the transfer film layer with lubrication and protective effect, further compared with less wear.
In an embodiment of the present invention, in described composite, the weight/mass percentage composition of Graphene is 0.5%.
In an embodiment of the present invention, the molecular weight of described ultra-high molecular weight polyethylene is 2～3 × 106, average grain
Footpath is 30～150 μm.
In an embodiment of the present invention, it is complex as Graphene and super high molecular weight under the described impact in high velocity air
Polyethylene is compound under the rotating speed of 3000-4000r/min.
In an embodiment of the present invention, the wear rate of described composite is 3.5～8 × 1015/m3n-1m-1.
In an embodiment of the present invention, described composite also includes CNT or CNT and Graphene
The mixture and ultra-high molecular weight polyethylene compound product obtaining under high velocity air impact, in wherein said composite, carbon is received
The weight/mass percentage composition of mitron is 0.1-0.5%.
Another aspect of the present invention also provides a kind of method preparing above-mentioned composite, comprises the steps：By Graphene
Compound under high velocity air impact after mixing with ultra-high molecular weight polyethylene, obtain composite.
High velocity air impact method, is a kind of method that method using dry type, machinery carries out Combined Processing to microparticle,
The method produces high velocity air using the rotor of high-speed motion and drives granule to make high-speed motion, and granule is in impact, shear action
Under, input energy is rich to be based on particle surface, so that particle surface activation.Filler particles adhere to ultra-high molecular weight polyethylene
The surface of granule, can equably complete at short notice to wrap up, can achieve homogenization and the grain shape of grain diameter simultaneously
Spheroidization.
Gas shock complex method scattered Graphene good dispersion in the composite, distribution density is high, agglomerate size
Little, good anti-attrition effect can be played.
And, the scattered Graphene of gas shock complex method is more likely to be distributed in UHMWPE particle surface fiber draw
Place, this is because UHMWPE particle surface and graphenic surface all have higher activity under gas shock mechanical force,
It is easier to combine in the big position of surface area.Graphene, in the reunion in these places, makes combination between UHMWPE granule tighter
Close, composite material strength is higher, and real contact area during friction is less, and therefore coefficient of friction reduces.
In an embodiment of the present invention, it is complex as Graphene and super high molecular weight under the described impact in high velocity air
Polyethylene, under the rotating speed of 3000-4000r/min, processes 15-20min.
In an embodiment of the present invention, described Graphene and ultra-high molecular weight polyethylene mixing ratio be 0.1～
0.5:99.5～99.9.
In an embodiment of the present invention, after Graphene being mixed with CNT, by mixture and super high molecular weight
Polyethylene is compound under high velocity air impact, and the ratio of CNT and ultra-high molecular weight polyethylene is 0.1～0.5:99.5～
99.9.
In an embodiment of the present invention, the composite of described preparation further includes：Composite is adopted mould
Molded, obtain composite material sheet.
In an embodiment of the present invention, the pressure that described compression molding is adopted is 15～20MPa, and pressurization rises simultaneously
Temperature to 150～180 DEG C, constant temperature 30-40min, obtain composite material sheet after cooling.
In an embodiment of the present invention, described compression molding also includes composite is placed in inclined-plane mould,
With the pressure of 15～20Mpa under hot press, in 150～180 DEG C of hot pressing 30Min, after natural cooling, obtain composite material sheet, its
In, a composite wherein surface of described formation tilts or parallel to surface along unified direction, another surface inclination side
To just contrary.The present invention prepares the lower composite of the unidirectional coefficient of friction of one side by heat pressing process.Party's legal system
Standby composite, all exposed Graphenes on surface have the consistent tendentiousness in this surface relatively, can make Graphene multiple
Condensation material surface effectively strengthens wearability and reduces coefficient of friction simultaneously.
In an embodiment of the present invention, described composite is further arranged in hot roller, passes through heat at 180 DEG C
Roller, obtains composite material sheet, and wherein, upper drum rotation speed is 40r/min, and bottom roll rotating speed is 20r/min.The present invention adopts
Speed change roll processes, prepare that thickness is thinner, Graphene along the higher composite of the plate surface degree of orientation, prepared answers
Condensation material has lower coefficient of friction.
Embodiment
It is to allow the preparation method of ultra-high molecular weight polyethylene composite material of the present invention to become apparent, below especially exemplified by preferable
Embodiment, elaborates, and protection scope of the present invention is not limited by the following examples.Methods described is equal if no special instructions
For conventional method.Described raw material all can obtain from open commercial sources if no special instructions.
Embodiment 1
By ultra-high molecular weight polyethylene powder under 180 DEG C, 15MPa, hot pressing 30min, obtain the poly- second of pure ultra-high molecular mass
Alkene material.
Embodiment 2
Weigh 0.1g graphene powder and add high velocity air impact set composite with 99.9g ultra-high molecular weight polyethylene,
Carry out Combined Processing 20min under the rotating speed of 3000r/min, obtain ultra-high molecular weight polyethylene/graphite alkene composite；By superelevation
Molecular weight polyethylene/graphene composite material under 180 DEG C, 15MPa, hot pressing 30min, obtain ultra-high molecular weight polyethylene/stone
Black alkene composite.
Embodiment 3
Weigh 0.2g graphene powder and add high velocity air impact set composite with 99.8g ultra-high molecular weight polyethylene,
Carry out Combined Processing 15min under the rotating speed of 4000r/min, obtain ultra-high molecular weight polyethylene/graphite alkene composite；By superelevation
Molecular weight polyethylene/graphene composite material under 150 DEG C, 20MPa, hot pressing 40min, obtain ultra-high molecular weight polyethylene/stone
Black alkene composite.
Embodiment 4
Weigh 0.3g graphene powder and add high velocity air impact set composite with 99.7g ultra-high molecular weight polyethylene,
Carry out Combined Processing 15min under the rotating speed of 4000r/min, obtain ultra-high molecular weight polyethylene/graphite alkene composite；By superelevation
Molecular weight polyethylene/graphene composite material under 160 DEG C, 19MPa, hot pressing 40min, obtain ultra-high molecular weight polyethylene/stone
Black alkene composite.
Embodiment 5
Weigh 0.4g graphene powder and add high velocity air impact set composite with 99.6g ultra-high molecular weight polyethylene,
Carry out Combined Processing 20min under the rotating speed of 3000r/min, obtain ultra-high molecular weight polyethylene/graphite alkene composite；By superelevation
Molecular weight polyethylene/graphene composite material under 170 DEG C, 18MPa, hot pressing 30min, obtain ultra-high molecular weight polyethylene/stone
Black alkene composite.
Embodiment 6
Weigh 0.5g graphene powder and add high velocity air impact set composite with 99.5g ultra-high molecular weight polyethylene,
Carry out Combined Processing 15min under the rotating speed of 3000r/min, obtain ultra-high molecular weight polyethylene/graphite alkene composite；By superelevation
Molecular weight polyethylene/graphene composite material under 150 DEG C, 17MPa, hot pressing 30min, obtain ultra-high molecular weight polyethylene/stone
Black alkene composite.
Embodiment 7
Weigh 0.2g graphene powder and 0.3g carbon nanotube powder, add at a high speed with 99.5g ultra-high molecular weight polyethylene
Gas shock set composite, carries out Combined Processing 15min under the rotating speed of 3000r/min, obtains ultra-high molecular weight polyethylene/stone
Black alkene-carbon nano tube compound material；By ultra-high molecular weight polyethylene/graphite alkene-carbon nano tube compound material in 150 DEG C, 17MPa
Under, hot pressing 30min, obtain ultra-high molecular weight polyethylene/graphite alkene-carbon nano tube compound material.
Embodiment 8
The ultra-high molecular weight polyethylene composite material impacting complex method preparation by high velocity air is placed in internal diameter is
In the inclined-plane mould of 25mm, with the pressure of 15～20MPa under hot press, hot pressing 30min at 150～180 DEG C, after natural cooling
Obtain composite material sheet.Wherein, the composite of a formation wherein surface tilts or parallel to surface along unified direction,
Another surface incline direction is just contrary.
Embodiment 9
The ultra-high molecular weight polyethylene composite material of complex method preparation will be impacted by high velocity air at 120 degrees Celsius
At a temperature of preheat 20min, hot roller is heated to 180 degrees Celsius, wherein, upper drum rotation speed is adjusted to 40r/min, bottom roll rotating speed
For 20r/min.By preheated ultra-high molecular weight polyethylene composite material through overheated roller, obtain composite material sheet, natural
Cooling shaping.
Embodiment 10
The ultra-high molecular weight polyethylene composite material of above-described embodiment 1-6 preparation is carried out performance test.
Electronic Speculum Shape measure result is referring to Fig. 1-5, the SEM figure of ultra-high molecular weight polyethylene composite material, Fig. 1-5 generation respectively
Table Graphene content is 0.1%, 0.2%, 0.3%, 0.4% and 0.5%.It can be seen that the most of distribution of Graphene
At High molecular weight polyethylene particle surface fiber draw.This is because high velocity air impact under High molecular weight polyethylene granule
Surface and graphenic surface all have higher activity it is easier to combine in the big position of surface area.And ultrasonic power is not
Can effective dispersed graphite alkene, its reason be probably in the dry run of solution evaporation Graphene once more there occurs reunion, and
Then there is not this problem in high velocity air impact.
More preferable compared with the graphene dispersion of ultrasonic disperse using the scattered Graphene of gas shock complex method, in composite wood
In material, distribution density is higher, and therefore friction resistant performance is more preferable.And the graphene dispersion of ultrasonic disperse is poor, agglomerate size is big, rubs
The Graphene distribution density on wiping surface or top layer is low to be acted on it is impossible to play good anti-attrition.
Frictional behaviour test is using the polishing machine of friction and wear test instrument (HSR-2M) test compound material.By test
The coefficient of friction that instrument is measured, calculates the wear rate of composite using equation below.
Wear rate computing formula is：
K (mm in formula3N-1m-1) it is material wear rate, S is eroded area cross-sectional area, and L is eroded area length, and F is to apply
Plus load, D is total abrasion distance.
Result, referring to Fig. 6, can be seen that ultra-high molecular weight polyethylene composite wood of the present invention from the friction coefficient curve of Fig. 6
Material is gradually reduced with the increase of Graphene content, coefficient of friction.When the content of Graphene is 0.5%, the rubbing of composite
Wiping coefficient is compared pure ultra-high molecular mass polyethylene and is reduced 22.1%.Graphene, because its unique interlayer structure, is made by shearing
Used time interlayer easily occurs relatively to slide, and forms the continuous transfer membrane with self-lubricating and high binding characteristic in friction surface, can have
Effect reduces frictional resistance.
Result, referring to Fig. 7, can be seen that when the content of Graphene is 0.5% from the wear rate curve of Fig. 7, wear rate
Compare pure ultra-high molecular mass polyethylene and reduce 55%.This is because, after filling Graphene, one side composite materials property
Strengthen, another aspect Graphene can effectively hinder crackle to be formed and spread, and slow down ground effect, and reduce grinding size, play
Reduce the effect of wear rate.Additionally use worn composite rate and the pure ultra-high molecular mass polyethylene of conventional Ultrasound dispersion preparation
Compare and have almost no change, and then substantially reduced using the worn composite rate that gas shock is combined preparation.
Embodiment described above is only that the preferred embodiment of the present invention is described, the not model to the present invention
Enclose and be defined, on the premise of without departing from design spirit of the present invention, this area ordinary skill technical staff is to the technology of the present invention
Various modifications and improvement that scheme is made, all should fall in the protection domain of claims of the present invention determination.
Claims (12)
1. a kind of ultra-high molecular weight polyethylene composite material, it is included by Graphene with ultra-high molecular weight polyethylene in high velocity air
The lower compound product obtaining of impact；Wherein, in described composite, the weight/mass percentage composition of Graphene is 0.1-0.5%.
2. composite as claimed in claim 1 is it is characterised in that the molecular weight of described ultra-high molecular weight polyethylene is 2～3
×106, mean diameter be 30～150 μm.
3. composite as claimed in claim 1 is it is characterised in that be complex as Graphene under the described impact in high velocity air
Compound under the rotating speed of 3000-4000r/min with ultra-high molecular weight polyethylene.
4. composite as claimed in claim 1 is it is characterised in that wear rate is 3.5～8 × 1015/m3n-1m-1.
5. composite as claimed in claim 1 is it is characterised in that described composite also includes CNT or carbon nanometer
Pipe is combined, under high velocity air impact, the product obtaining with ultra-high molecular weight polyethylene with the mixture of Graphene, wherein said multiple
In condensation material, the weight/mass percentage composition of CNT is 0.1-0.5%.
6. a kind of method of the composite prepared described in claim 1, comprises the steps：By Graphene and super high molecular weight
Compound under high velocity air impact after polyethylene mixing, obtain composite.
7. method as claimed in claim 6 is it is characterised in that being complex as Graphene under the described impact in high velocity air and surpassing
High molecular weight polyethylene, under the rotating speed of 3000-4000r/min, processes 15-20min.
8. method as claimed in claim 6 it is characterised in that described Graphene and ultra-high molecular weight polyethylene mixing ratio
For 0.1～0.5:99.5～99.9.
9. after method as claimed in claim 6 it is characterised in that mix Graphene with CNT, by mixture with super
High molecular weight polyethylene is compound under high velocity air impact, and the ratio of described CNT and ultra-high molecular weight polyethylene is 0.1
～0.5:99.5～99.9.
10. method as claimed in claim 6 is it is characterised in that by further for described composite compression molding, be combined
Material sheet, the pressure that described compression molding is adopted is 15-20MPa, and pressurization is warming up to 150-180 DEG C simultaneously, and constant temperature 30-
40min, obtains composite material sheet after cooling.
11. methods as claimed in claim 10 are it is characterised in that described compression molding also includes for composite being placed in inclined-plane
In mould, with the pressure of 15～20Mpa under hot press, in 150～180 DEG C of hot pressing 30Min, after natural cooling, obtain composite wood
Media sheet, wherein, a composite wherein surface of described formation tilts or parallel to surface, Ling Yibiao along unified direction
Face incline direction is just contrary.
12. methods as claimed in claim 11 are it is characterised in that described composite is further arranged in hot roller, 180
Pass through hot roller at DEG C, obtain composite material sheet, wherein, upper drum rotation speed is 40r/min, and bottom roll rotating speed is 20r/min.
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| CN107573570A (en) * | 2017-11-03 | 2018-01-12 | 安徽南方化工泵业有限公司 | A kind of Wear-resistant, high-temperature resistant high polymer material formulation |
| CN109851898A (en) * | 2019-01-28 | 2019-06-07 | 深圳市驭晟新材料科技有限公司 | A kind of compound prescription and its processing technology of the polymer being used to prepare elevator guide shoe |
| CN114573894A (en) * | 2020-12-01 | 2022-06-03 | 中国石油天然气股份有限公司 | Carbon nano tube master batch and preparation method and application thereof |
| CN115746435A (en) * | 2022-12-30 | 2023-03-07 | 东实汽车科技集团股份有限公司 | Wear-resistant lubricating plastic gasket for automobile transmission system and preparation method |
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| CN114573894B (en) * | 2020-12-01 | 2024-03-01 | 中国石油天然气股份有限公司 | Carbon nano tube master batch and preparation method and application thereof |
| CN115746435A (en) * | 2022-12-30 | 2023-03-07 | 东实汽车科技集团股份有限公司 | Wear-resistant lubricating plastic gasket for automobile transmission system and preparation method |
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| Publication number | Publication date |
|---|---|
| CN106432873B (en) | 2018-10-16 |
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