CN110358230A - Anti abrasive PTFE based composites under a kind of dry friction - Google Patents

Anti abrasive PTFE based composites under a kind of dry friction Download PDF

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CN110358230A
CN110358230A CN201910761477.4A CN201910761477A CN110358230A CN 110358230 A CN110358230 A CN 110358230A CN 201910761477 A CN201910761477 A CN 201910761477A CN 110358230 A CN110358230 A CN 110358230A
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ptfe
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赵伟芬
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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
    • C08K3/28—Nitrogen-containing compounds
    • 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
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/16—Solid spheres
    • C08K7/18—Solid spheres inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • 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
    • C08K3/28—Nitrogen-containing compounds
    • C08K2003/282—Binary compounds of nitrogen with 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention relates to self-lubricating antifriction wearing composite material technical fields, and anti abrasive PTFE based composites under a kind of dry friction are disclosed, the raw material including following parts by weight proportion: the nano silica (SiO of polytetrafluoroethylene (PTFE) (PTFE) powder of 60~80 parts of average grain diameter 38um, 8~15 parts of average grain diameter 100nm2) powder, 10~12 parts of ball-type micrometer alumina (Al2O3) powder or/and nano aluminum nitride (AlN) powder；The preparation method of above-mentioned PTFE based composites is uniformly mixed above-mentioned raw materials the following steps are included: first passing through mechanical stirring, again by uniformly mixed compound material, hot pressing is kept in the case where temperature is 360~380 DEG C, pressure is 40~45MPa, demoulding when temperature is down to 110 DEG C obtains PTFE based composites.The present invention solves current existing polytetrafluoroethylene material under dry friction conditions in use, existing not wear-resisting technical problem.

Description

Anti abrasive PTFE based composites under a kind of dry friction
Technical field
It is anti abrasive under specially a kind of dry friction the present invention relates to self-lubricating antifriction wearing composite material technical field PTFE based composites.
Background technique
Abrasion, corrosion and fracture are three kinds of principal modes of material failure, wherein being by the failure caused by fretting wear The main reason for mechanic and electrical material failure including aviation, machinery, electronics, there are about 70~80% equipment damage and 30~ Caused by 50% energy consumption is various forms of abrasions.And lubricating is the important means for reducing fretting wear, but lubricant Use can bring the pollution of working environment, lubricated especially for machine associated with certain sophisticated electronics, can be serious Influence the service performance of sophisticated electronics.
And polytetrafluoroethylene (PTFE) (PTFE) is used as a kind of solid lubricant, specific process of friction and wear are as follows: in pressure and Under opposite grinding uneven surface point shear action, a small amount of PTFE macromolecule leave frosting be attached to antithesis mill part surface formed it is reachable The transfer of the film of 0.02~0.03um, referred to as film, the film of transfer help to improve the wear-resisting property of PTFE；Conversely, if right Mill part is highly polished, and surface is smooth, and polytetrafluoroethylene (PTFE) transfer film is few, then PTFE is easy to wear, shows as not wear-resisting.
Although pure PTFE is under dry friction conditions, with steel to the coefficient of friction very little rubbed, only 0.1 or so, it is pure PTFE is not wear-resisting, the higher (δ 10 of wear rate-4mm3(N·m)-1)。
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides PTFE based composites anti abrasive under a kind of dry friction, solutions Current existing polytetrafluoroethylene material determined under dry friction conditions in use, existing not wear-resisting technical problem.
(2) technical solution
To achieve the above object, the invention provides the following technical scheme:
Anti abrasive PTFE based composites under a kind of dry friction, the raw material including following parts by weight proportion: 60~80 Part polytetrafluoroethylene (PTFE) (PTFE) powder of average grain diameter 38um, 8~15 parts of average grain diameter 100nm nano silica (SiO2) powder, 10~12 parts of ball-type micrometer alumina (Al2O3) powder or/and nano aluminum nitride (AlN) powder；
The preparation method of above-mentioned PTFE based composites mixes above-mentioned raw materials the following steps are included: first passing through mechanical stirring Uniformly, then by uniformly mixed compound material, hot pressing, temperature are kept in the case where temperature is 360~380 DEG C, pressure is 40~45MPa Demoulding when being down to 110 DEG C obtains PTFE based composites.
Preferably, the ball-type micrometer alumina (Al2O3) powder average grain diameter be 6.5um.
Preferably, the average grain diameter of nano aluminum nitride (AlN) powder is 100nm.
Further, the PTFE based composites further include the raw material of following parts by weight proportion: 20 parts of average grain Ultra-high molecular weight polyethylene (UHMWPE) powder of diameter 250um.
(3) beneficial technical effect
Compared with prior art, the present invention has following beneficial technical effect:
By the nanometer two of polytetrafluoroethylene (PTFE) (PTFE) powder of 80 parts of average grain diameter 38um, 10 parts of average grain diameter 100nm Silica (SiO2) powder, 10 parts of average grain diameter 6.5um ball-type micrometer alumina (Al2O3) powder composition raw material prepared by PTFE based composites, after tested: its average dry friction coefficient μ is 0.20, wear rate δ is 5.3 × 10-6mm3(N·m)-1；
By the nanometer two of polytetrafluoroethylene (PTFE) (PTFE) powder of 75 parts of average grain diameter 38um, 15 parts of average grain diameter 100nm Silica (SiO2) powder, 7 parts of average grain diameter 6.5um ball-type micrometer alumina (Al2O3) powder, 3 parts of average grain diameter 100nm Nano aluminum nitride (AlN) powder composition raw material prepared by PTFE based composites, after tested: its average dry friction coefficient μ is 0.21, wear rate δ is 5.0 × 10-6mm3(N·m)-1；
By the nanometer two of polytetrafluoroethylene (PTFE) (PTFE) powder of 80 parts of average grain diameter 38um, 10 parts of average grain diameter 100nm Silica (SiO2) powder, 10 parts of average grain diameter 100nm nano aluminum nitride (AlN) powder composition raw material prepared by PTFE Based composites, after tested: its average dry friction coefficient μ is 0.19, wear rate δ is 4.1 × 10-6mm3(N·m)-1；
By the superelevation point of polytetrafluoroethylene (PTFE) (PTFE) powder of 60 parts of average grain diameter 38um, 20 parts of average grain diameter 250um Nano silica (the SiO of sub- weight northylen (UHMWPE) powder, 8 parts of average grain diameter 100nm2) powder, 12 parts of average grain diameter PTFE based composites prepared by the raw material of nano aluminum nitride (AlN) the powder composition of 100nm, after tested: its average unlubricated friction Wiping coefficient μ is 0.17, wear rate δ is 4.3 × 10-6mm3(N·m)-1；
With the pure PTFE material prepared in comparative example by polytetrafluoroethylene (PTFE) (PTFE) powder of 100 parts of average grain diameter 38um Average dry friction coefficient μ 0.16, wear rate δ 954 × 10-6mm3(N·m)-1It compares；
The present invention achieves the technical effect for significantly reducing pure PTFE material wear rate under dry friction environment, and at the same time The dry friction coefficient of PTFE based composites of the invention and the dry friction coefficient of pure PTFE material achieve almost the same skill Art effect.
Specific embodiment
Following embodiment and raw material used in comparative example are as follows:
Polytetrafluoroethylene (PTFE) (PTFE) powder, average grain diameter 38um；
Ultra-high molecular weight polyethylene (UHMWPE) powder, average grain diameter 250um；
Nano silica (SiO2) powder, average grain diameter 100nm；
Ball-type micrometer alumina (Al2O3) powder, average grain diameter 6.5um；
Nano aluminum nitride (AlN) powder, average grain diameter 100nm.
Embodiment one:
PTFE based composites include the raw material of following parts by weight proportion: the polytetrafluoroethyl-ne of 80 parts of average grain diameter 38um Nano silica (the SiO of alkene (PTFE) powder, 10 parts of average grain diameter 100nm2) powder, 10 parts of average grain diameter 6.5um ball Type micrometer alumina (Al2O3) powder；
The preparation methods of PTFE based composites the following steps are included:
Step 1: by polytetrafluoroethylene (PTFE) (PTFE) powder of 80 parts of average grain diameter 38um, 10 parts of average grain diameter 100nm Nano silica (SiO2) powder, 10 parts of average grain diameter 6.5um ball-type micrometer alumina (Al2O3) powder is added to powder together Expect in mixing arrangement, is uniformly mixed above-mentioned material by mechanical stirring；
Step 2: the compound material that will be uniformly mixed in step 1 keeps heat in the case where temperature is 360 DEG C, pressure is 45MPa 2h is pressed, later, is cooled down in the case where pressure is 45MPa, demoulding when temperature is down to 110 DEG C obtains PTFE based composites.
Embodiment two:
PTFE based composites include the raw material of following parts by weight proportion: the polytetrafluoroethyl-ne of 75 parts of average grain diameter 38um Nano silica (the SiO of alkene (PTFE) powder, 15 parts of average grain diameter 100nm2) powder, 7 parts of average grain diameter 6.5um ball-type Micrometer alumina (Al2O3) powder, 3 parts of average grain diameter 100nm nano aluminum nitride (AlN) powder；
The preparation methods of PTFE based composites the following steps are included:
Step 1: by polytetrafluoroethylene (PTFE) (PTFE) powder of 75 parts of average grain diameter 38um, 15 parts of average grain diameter 100nm Nano silica (SiO2) powder, 5 parts of average grain diameter 6.5um ball-type micrometer alumina (Al2O3) powder, 5 parts of average grain diameter Nano aluminum nitride (AlN) powder of 100nm is added in mixing apparatus of powdery row material together, mixes above-mentioned material by mechanical stirring equal It is even；
Step 2: the compound material that will be uniformly mixed in step 1 keeps heat in the case where temperature is 370 DEG C, pressure is 40MPa 2h is pressed, later, is cooled down in the case where pressure is 40MPa, demoulding when temperature is down to 110 DEG C obtains PTFE based composites.
Embodiment three:
PTFE based composites include the raw material of following parts by weight proportion: the polytetrafluoroethyl-ne of 80 parts of average grain diameter 38um Nano silica (the SiO of alkene (PTFE) powder, 10 parts of average grain diameter 100nm2) powder, 10 parts of average grain diameter 100nm receive Rice aluminium nitride (AlN) powder；
The preparation methods of PTFE based composites the following steps are included:
Step 1: by polytetrafluoroethylene (PTFE) (PTFE) powder of 80 parts of average grain diameter 38um, 10 parts of average grain diameter 100nm Nano silica (SiO2) powder, 10 parts of average grain diameter 100nm nano aluminum nitride (AlN) powder be added to together powder mixing In device, it is uniformly mixed above-mentioned material by mechanical stirring；
Step 2: the compound material that will be uniformly mixed in step 1 keeps heat in the case where temperature is 360 DEG C, pressure is 45MPa 2h is pressed, later, is cooled down in the case where pressure is 45MPa, demoulding when temperature is down to 110 DEG C obtains PTFE based composites.
Example IV:
PTFE based composites include the raw material of following parts by weight proportion: the polytetrafluoroethyl-ne of 60 parts of average grain diameter 38um Ultra-high molecular weight polyethylene (UHMWPE) powder, 8 parts of average grain diameter 100nm of alkene (PTFE) powder, 20 parts of average grain diameter 250um Nano silica (SiO2) powder, 12 parts of average grain diameter 100nm nano aluminum nitride (AlN) powder；
The preparation methods of PTFE based composites the following steps are included:
Step 1: by polytetrafluoroethylene (PTFE) (PTFE) powder of 60 parts of average grain diameter 38um, 20 parts of average grain diameter 250um Nano silica (the SiO of ultra-high molecular weight polyethylene (UHMWPE) powder, 8 parts of average grain diameter 100nm2) powder, 12 parts flat Nano aluminum nitride (AlN) powder of equal partial size 100nm is added in mixing apparatus of powdery row material together, makes above-mentioned material by mechanical stirring It is uniformly mixed；
Step 2: the compound material that will be uniformly mixed in step 1 keeps heat in the case where temperature is 380 DEG C, pressure is 40MPa 2h is pressed, later, is cooled down in the case where pressure is 40MPa, demoulding when temperature is down to 110 DEG C obtains PTFE based composites.
Comparative example:
Pure PTFE material includes the raw material of following parts by weight proportion: the polytetrafluoroethylene (PTFE) of 100 parts of average grain diameter 38um (PTFE) powder；
The preparation method of pure PTFE material the following steps are included:
By polytetrafluoroethylene (PTFE) (PTFE) powder of 100 parts of average grain diameter 38um, in the case where temperature is 380 DEG C, pressure is 40MPa Hot pressing 2h is kept, later, is cooled down in the case where pressure is 40MPa, demoulding when temperature is down to 110 DEG C obtains pure PTFE material Material.
Performance test:
By the PTFE based composites sample in above-described embodiment and the pure PTFE material sample in comparative example, preparation At having a size of 30mm × 7mm × 6mm sample；
Friction and wear behavior, couple are evaluated according to GB3960-88 method using MM-200 type ring-block friction wear testing machine Ring is using quenching 45#Steel, having a size of φ 40mm × 10mm, surface roughness RaFor 0.2~0.4um, surface hardness 180HB；
Experiment condition: load 200N, linear velocity 0.42ms-1, wearing- in period 120min, in dry friction, atmospheric environment, room It is carried out under the conditions of temperature, test result is as follows shown in table 1.
Table 1
Product number Average friction coefficient μ Wear rate δ/10-6mm3(N·m)-1
Embodiment one 0.20 5.3
Embodiment two 0.21 5.0
Embodiment three 0.19 4.1
Example IV 0.17 4.3
Comparative example 0.16 954

Claims (4)

1. anti abrasive PTFE based composites under a kind of dry friction, which is characterized in that the original including following parts by weight proportion Material: the nanometer two of polytetrafluoroethylene (PTFE) (PTFE) powder of 60~80 parts of average grain diameter 38um, 8~15 parts of average grain diameter 100nm Silica (SiO2) powder, 10~12 parts of ball-type micrometer alumina (Al2O3) powder or/and nano aluminum nitride (AlN) powder；
The preparation method of above-mentioned PTFE based composites keeps above-mentioned raw materials mixing equal the following steps are included: first passing through mechanical stirring It is even, then by uniformly mixed compound material, hot pressing, temperature drop are kept in the case where temperature is 360~380 DEG C, pressure is 40~45MPa It is demoulded when to 110 DEG C, obtains PTFE based composites.
2. PTFE based composites according to claim 1, which is characterized in that the ball-type micrometer alumina (Al2O3) powder Average grain diameter be 6.5um.
3. PTFE based composites according to claim 1, which is characterized in that nano aluminum nitride (AlN) powder is put down Equal partial size is 100nm.
4. PTFE based composites according to claim 1, which is characterized in that the PTFE based composites further include with The raw material of lower parts by weight proportion: ultra-high molecular weight polyethylene (UHMWPE) powder of 20 parts of average grain diameter 250um.
CN201910761477.4A 2019-08-18 2019-08-18 Anti abrasive PTFE based composites under a kind of dry friction Pending CN110358230A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114989547A (en) * 2022-06-24 2022-09-02 佛山科学技术学院 Polymer composite material with abrasion in-situ repair function and preparation method and application thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1740226A (en) * 2005-09-14 2006-03-01 南京航空航天大学 Compound PTFE material with low friction and high wear resistance and its prepn process
CN101235179A (en) * 2008-01-08 2008-08-06 重庆长江轴承股份有限公司 Self-lubricating composite material and its preparation method
CN102517953A (en) * 2011-11-17 2012-06-27 朱国荣 Abrasive disc for papermaking
CN103788551A (en) * 2014-01-14 2014-05-14 盐城工学院 Polytetrafluoroethylene composite material and preparation method thereof
CN110039851A (en) * 2019-04-19 2019-07-23 中国电子科技集团公司第四十六研究所 A kind of preparation method of Copper Clad Laminates Based On Polytetrafluoroethylene

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1740226A (en) * 2005-09-14 2006-03-01 南京航空航天大学 Compound PTFE material with low friction and high wear resistance and its prepn process
CN101235179A (en) * 2008-01-08 2008-08-06 重庆长江轴承股份有限公司 Self-lubricating composite material and its preparation method
CN102517953A (en) * 2011-11-17 2012-06-27 朱国荣 Abrasive disc for papermaking
CN103788551A (en) * 2014-01-14 2014-05-14 盐城工学院 Polytetrafluoroethylene composite material and preparation method thereof
CN110039851A (en) * 2019-04-19 2019-07-23 中国电子科技集团公司第四十六研究所 A kind of preparation method of Copper Clad Laminates Based On Polytetrafluoroethylene

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114989547A (en) * 2022-06-24 2022-09-02 佛山科学技术学院 Polymer composite material with abrasion in-situ repair function and preparation method and application thereof
CN114989547B (en) * 2022-06-24 2024-01-02 佛山科学技术学院 Polymer composite material with abrasion in-situ repair function and preparation method and application thereof

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