CN107759964A - A kind of polyformaldehyde composite material and its production and use - Google Patents
A kind of polyformaldehyde composite material and its production and use Download PDFInfo
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- CN107759964A CN107759964A CN201711015289.4A CN201711015289A CN107759964A CN 107759964 A CN107759964 A CN 107759964A CN 201711015289 A CN201711015289 A CN 201711015289A CN 107759964 A CN107759964 A CN 107759964A
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Abstract
The invention discloses a kind of polyformaldehyde composite material and its production and use, belong to field of polymer composite material.The polyformaldehyde composite material includes following raw material components and parts by weight：100 parts of polyformaldehyde, 10~30 parts of carbon fiber, 0.5~5.0 part of CNT, 1.0~10 parts of anti-wear agent, 1.0~10 parts of elastomer, graphene/1.0~5.0 parts of PA6 master batches, 0.5~3.0 part of formaldehyde catching agent, 0.3~1.0 part of surface conditioning agent, 0.1~2.0 part of lubricant, 0.1~1.0 part of antioxidant.The polyformaldehyde composite material of the present invention has high intensity, high-modulus, while the wearability of material, impact resistance are improved, while reduces the thermal decomposition of polyformaldehyde, improves the mechanical property of composite；The friction temperature of material is reduced, improves the service life of material.
Description
Technical field
The invention belongs to field of polymer composite material, and in particular to a kind of polyformaldehyde composite material and preparation method thereof and
Purposes.
Background technology
Polyformaldehyde is one of five large-engineering plastics, has high-modulus, high rigidity, endurance, self-lubricating, wear-resistant, size
The feature in the majority such as stable, is widely used in household electrical appliances, mechanical part, resistance to especially suitable for mechanical drive gear, lubrication bearing, axle sleeve etc.
Part is ground, is the light-weighted important foundation material of equipment.But polyformaldehyde easily decomposes produce formaldehyde low molecule in process
Thing, cause mechanics of materials intensity to decline, and cause environmental pollution, it is higher not to be suitable for load, particularly medical treatment, food machinery
Deng field.
In recent years, polyoxymethylene modified aspect is done a lot of work in the industry, in terms of disclosed patent, most of is to be based on subtracting
The decomposition of its few process, improves its wearability.Such as CN1270187A, CN101654541A, CN101759955A,
CN101724222A, CN107011622A etc. are wear-resisting to improve its as anti-wear agent using substantial amounts of polytetrafluoroethylene (PTFE) or graphite is added
Property, the problem of new therefore but is brought, that is, forms Immiscible Polymer Blends, polyformaldehyde mechanical property is declined to a great extent；In the industry using low
The organic low molecular compounds such as molecule formaldehyde catching agent such as dicyandiamide are as formaldehyde absorbent, and its assimilation effect is preferable, and use is low
Molecular organic compound such as fatty acid or Tissuemat E improve its processing fluidity as lubricant, effectively improve polyformaldehyde
Processing fluidity.It is but volatile in process or in use due to using substantial amounts of low-molecular-weight organic compound
Easy to migrate, in parts surface formation low molecule film, friction process, this low molecule film had both been influenceed the materials'use longevity by thermal decomposition
Life produces pollution to environment again；Meanwhile material mechanical performance will be caused to decline to a great extent using substantial amounts of low molecular compound.Cause
This, this material is not suitable for food machinery, medicine equipment, medicine equipment, automobile component.
CN101759957A discloses a kind of fiberglass reinforced polyformaldehyde composite material, polyformaldehyde：40~70%, glass：10
~30%, TPU：5~20%, PTFE：3~10%, antioxidant 1076：0.1~0.5%, lubricant TAF0.1~0.5, improve
The intensity of polyformaldehyde, but unresolved glass is scattered and exposed, parts surface is coarse, causes the problem of material wear ability difference.
CN103497482A discloses a kind of preparation method of high abrasion enhancing polyformaldehyde, polyformaldehyde：68.5~83.5%, organic/nothing
Machine composite fibre：10~20%, linear phenolic resin：3~5%, antioxidant：0.2~0.5%, formaldehyde absorbent：0.3~
1.0%, Tissuemat E：3~5%, composite fibre used is carbon fiber/glass, and linear phenolic resin makees fiber strength agent,
Make have good bonding between fiber and polyformaldehyde, but make formaldehyde absorbent using organic low molecular compounds such as melamines,
Tissuemat E equally exists the problem of foregoing, the addition of glass as lubricant so that product surface is coarse easy to wear.
The content of the invention
In view of the above the shortcomings that prior art, it is an object of the invention to provide a kind of polyformaldehyde composite material and its
Preparation method and purposes, process polyformaldehyde present in prior art is overcome easily to decompose, largely organised using low molecule
The problems such as material mechanical performance decline caused by compound and environmental pollution.
To achieve these goals or other purposes, the present invention is achieved by the following technical solutions.
A kind of polyformaldehyde composite material, the polyformaldehyde composite material include following raw material components and parts by weight：Poly- first
100 parts of aldehyde, 10~30 parts of carbon fiber, 0.5~5.0 part of CNT, 1.0~10 parts of anti-wear agent, 1.0~10 parts of elastomer, stone
Black alkene/1.0~5.0 parts of PA6 master batches, 0.5~3.0 part of formaldehyde catching agent, 0.3~1.0 part of surface conditioning agent, lubricant 0.1~
2.0 parts, 0.1~1.0 part of antioxidant.
Further, the polyformaldehyde is selected from acefal homopolymer or copolymerized methanal.
Further, the carbon fiber is chopped strand, and length is 2~4mm, and strength grade is T700~T1000, tow
Specification is 6k~24k, and filament diameter is 5~8 μm.Preferably, the parts by weight of carbon fiber are 15~25 parts.The present invention is used
Carbon fiber there is the characteristic such as high intensity, high-modulus, antistatic, wear-resisting, can have after surface treatment with acetal resin compared with
Good caking property, the mechanical property of polyformaldehyde can be effectively improved.
Further, the CNT is selected from hydroxyl carbon nano tube, carboxylic carbon nano-tube, aminated carbon nano tube
One kind.A diameter of 10~50nm of the CNT.Preferably, a diameter of 20~40nm of the CNT.It is more excellent
Selection of land, the parts by weight of CNT are 1.0~4.0 parts.The CNT that the present invention uses is as enhancing and wear resistant components, tool
There is more excellent wear-resisting and humidification, after couplingization processing, can have preferable caking property and dispersiveness with polyformaldehyde, both
The mechanical strength of polyformaldehyde can be provided can improve wearability again.
Further, one kind in nano aluminium oxide, graphite, molybdenum disulfide, polytetrafluoroethylene (PTFE) of the anti-wear agent or
A variety of, wherein aluminum oxide has tough and tensile surface characteristic, can improve the wear-out life of polyformaldehyde；And graphite, molybdenum disulfide, poly- four
PVF can improve the self-lubricity of polyformaldehyde, reduce coefficient of friction.
Preferably, the anti-wear agent is selected from aluminum oxide with polytetrafluoroethylene (PTFE) with mass ratio 1：The mixture that (2-6) is obtained, or
Aluminum oxide, molybdenum disulfide, polytetrafluoroethylene (PTFE) are with mass ratio 1：(2-4)：The mixture that (2-6) is obtained, or aluminum oxide, molybdenum disulfide
With mass ratio 1：The mixture that (2-6) is obtained.It is highly preferred that the parts by weight of anti-wear agent are 2.0~8.0 parts.
Further, the elastomer is selected from thermoplastic elastic body.Preferably, rubber is selected from nitrile rubber, day
T PNR, EP rubbers or silicon rubber.Thermoplastic elastomer (TPE) is selected from polyurethane, polyester elastomer or polyamide elastomer.It is preferred that
Ground, the parts by weight of elastomer are 3.0-5.0 parts.
Further, in the graphene/PA6 master batches graphene content be 10%, wherein graphene particle diameter be 10~
50nm.Preferably, the parts by weight of the graphene/PA6 master batches are 1.5-3.0 parts.It is female that graphene/PA6 is added in the present invention
Grain, the wear resistance agent thermal conductivity of polyformaldehyde can be improved, can caused heat in conducting parts friction process in time, reduction material
Heat ageing is degraded, and improves the service life of material.
Further, one or more of the formaldehyde catching agent in metal oxide, organic polymer.It is preferred that
Ground, the parts by weight of the formaldehyde catching agent are 1.0-2.0 parts.
Preferably, the metal oxide is in nano calcium oxide, silica, magnesia, zinc oxide, magnesium hydroxide
It is one or more.The organic polymer is selected from polyamide or ethylenic copolymer.
It is highly preferred that the polyamide is selected from PA6, PA66, PA610, PA612, PA11, PA12, PA1313 and its copolymerization
One kind in thing；The ethylenic copolymer is selected from ethylene-vinyl alcohol (EVOH) or ethylene-octene copolymer (POE).
It is highly preferred that compound of the formaldehyde catching agent selected from PA612 and magnesia, PA12 and zinc oxide is compound
The compound of thing, PA610 and silica, or the compound of ethylenic copolymer and metal oxide, mass ratio are 1：(1-
1.5).Metal oxide, the mixture of high molecular polymer make formaldehyde absorbent, and compared with organic low molecular thing, it absorbs effect
Fruit is more preferable；Decomposition itself is notheated in process so that the stable performance of material；Simultaneously as in composite not
Containing low molecular compound, the mechanical property of material can be effectively kept.
Further, the surface conditioning agent includes novolac epoxy resin and silane coupler.The silane coupler choosing
From KH550, KH560 one or two.Preferably, the mass ratio of novolac epoxy resin and silane coupler is 1：(2-3).More
Preferably, the parts by weight of surface conditioning agent are 0.5-0.8 parts.
Further, one or more of the lubricant in Long carbon chain soap, polymeric silicone.It is preferred that
Ground, the lubricant are selected from calcium stearate, zinc stearate, stearic amide.It is highly preferred that the lubricant is selected from macromolecule silicon
The compound of ketone and stearic amide, mass ratio 2：1.Preferred 0.5-1.5 parts of parts by weight of the lubricant.
Further, the antioxidant is selected from one or both of antioxidant 1010, irgasfos 168.Preferably, it is described
Antioxidant is selected from antioxidant 1010, the compound of irgasfos 168, and the mass ratio of antioxidant 1010 and irgasfos 168 is 1：(1.0-
2.0).It is highly preferred that the parts by weight of the antioxidant are 0.5-0.8 parts.
Present invention also offers a kind of method for preparing above-mentioned polyformaldehyde composite material, comprise the following steps：
(1) raw material components are surface-treated using surface conditioning agent；
(2) by CNT, formaldehyde catching agent and the anti-wear agent after step (1) processing, lubricant, elastomer, antioxygen
Agent mixes in proportion；
(3) polyformaldehyde, graphene/PA6 master batches are well mixed；
(4) by carbon fiber, the compound of step (2) and the obtained compound of step (3) after step (1) processing by
Ratio adds in extruder and carries out extruding pelletization, produces polyformaldehyde composite material.
Further, carbon fiber is surface-treated using surface conditioning agent in step (1), method is：By carbon fiber
After 2~5h of heated oxide, cool down and add in mixer, be proportionally added into surface conditioning agent, stir 3~10min.It is preferred that
Ground, carbon fiber is added in baking oven, be heated to 300~700 DEG C, after aoxidizing 2~5h, be cooled to 40~80 DEG C of taking-ups and add and stir
Mix in machine, be proportionally added into surface conditioning agent, stir 3~8min.It is highly preferred that being heated to 400-600 DEG C, 3-4 hours are aoxidized
Afterwards, 50-70 DEG C of taking-up is cooled to, mixing speed 60-100prm, stirs 3-5min.Wherein, carbon fiber and surface conditioning agent
Mass ratio is 100：(1-5).It is highly preferred that the mass ratio of carbon fiber and novolac epoxy resin is 100：(1-2)；Carbon fiber and silicon
The mass ratio of alkane coupling agent is 100：(1-5).
Further, CNT is surface-treated using surface conditioning agent in step (1), method is：Carbon is received
Mitron, surface conditioning agent are proportionally added into mixer, stir 3~6min.Preferably, the quality of CNT and surface conditioning agent
Than for 100：(1-3).It is highly preferred that being surface-treated using silane coupler to CNT, CNT is even with silane
The mass ratio for joining agent is 100：(1-2).Preferably, mixing speed 100-500prm.It is highly preferred that mixing time is 3-
4min, mixing speed 200-300prm.
When including metal oxide in formaldehyde catching agent and anti-wear agent, step (1) also includes the table to metal oxide
Face is handled.Specific method is：After metal oxide is mixed with CNT, surface conditioning agent, mixing speed are proportionally added into
100~500prm, stir 3~6min.Preferably, the quality of CNT, the gross mass of metal oxide and surface conditioning agent
Than for 100：(1-5).It is highly preferred that the gross mass of CNT, metal oxide and the mass ratio of surface conditioning agent are 100：
(2-4), mixing time are 3~4min, 200~300prm of mixing speed.
Preferably, mixing speed is 100-300prm, mixing time 3-6min in step (2).It is highly preferred that step
(2) mixing speed is 150-250prm, mixing time 3-5min in.
Preferably, mixing speed is 60-200prm, mixing time 3-5min in step (3).It is highly preferred that step (3)
Middle mixing speed is 60-100prm, mixing time 3-4min.
Preferably, extrusion temperature is 150~180 DEG C in step (4), and vacuum is -0.06~-0.09MPa, and rotating speed is
400~500prm.
It is highly preferred that double screw extruder is used in step (4), the blending extrusion temperature from feed opening to extruder die head
For：150 DEG C, 160 DEG C, 160 DEG C, 170 DEG C, 170 DEG C, 180 DEG C, 180 DEG C, 165 DEG C, 150 DEG C；Screw speed is 450-
480prm；Vacuum is -0.06-0.08MPa.
Polyformaldehyde composite material provided by the present invention, by using the raw material components necessarily matched, polyformaldehyde is carried out
Modified, the wearability of material can also be improved, effectively improve the resistance to of material by having composite while high strength and modulus
Impact, while reduce the thermal decomposition of polyformaldehyde, improve the mechanical property of composite；Reduce the friction temperature of material
Degree, improve the service life of material.Preparation method provided by the present invention, first to carbon fiber, CNT and raw material group
Metal oxide in point is surface-treated, and carbon fiber, CNT and polyformaldehyde is preferably bonded, is advantageous to carbon nanometer
Pipe disperses with metal oxide in polyformaldehyde, effectively increases the mechanical property and wearability of polyformaldehyde.
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Before the specific embodiment of the invention is further described, it should be appreciated that protection scope of the present invention is not limited to down
State specific specific embodiment；It is also understood that the term used in the embodiment of the present invention is specific specific in order to describe
Embodiment, the protection domain being not intended to be limiting of the invention.The test method of unreceipted actual conditions in the following example,
Generally according to normal condition, or the condition proposed by according to each manufacturer.
When embodiment provides number range, it should be appreciated that except non-invention is otherwise noted, two ends of each number range
Any one numerical value can be selected between point and two end points.Unless otherwise defined, in the present invention all technologies for using and
Scientific terminology is identical with the meaning that those skilled in the art of the present technique are generally understood that.Except used in embodiment specific method, equipment,
Outside material, according to grasp of the those skilled in the art to prior art and the record of the present invention, it can also use and this
Any method, equipment and the material of the similar or equivalent prior art of method, equipment described in inventive embodiments, material come real
The existing present invention.
Raw material components employed in the embodiment of the present invention are commercially available by general commercial means.
Embodiment 1
A kind of polyformaldehyde composite material, raw material components and quality are as follows：Polyformaldehyde 10kg, carbon fiber 2kg, anti-wear agent
A0.5kg (aluminum oxide：PTFE is 1：2), graphene/PA6 master batches 0.2kg, PA612/ magnesia compound 0.1kg (mass ratioes 1：
1), nitrile rubber 0.3kg, the multiple thing 0.1kg (mass ratioes 2 of polymeric silicone/stearic amide：1), novolac epoxy resin 30g,
KH55060g, antioxidant 50g.
Preparation method is：(1) surface treatment of carbon fibers：Carbon fiber is put into baking oven, is heated to 400 DEG C, high-temperature oxydation 4 is small
Shi Hou, it is cooled to 60 DEG C and takes out and add in mixer, add novolac epoxy resin 30g, stirs 2min, mixing speed 60prm；
Again plus coupling agent 20g, 3min, mixing speed 60prm are stirred, loads measuring tank B.
(2) CNT and metal oxide surface processing：CNT, aluminum oxide, magnesia are added in blender,
One side stirring at low speed stirs 4min, mixing speed 200prm while add coupling agent 40g, standby.
(3) auxiliary agent mixes：By the CNT handled well, aluminum oxide, magnesia and PTFE, nitrile rubber, PA612, height
The auxiliary agents such as molecule silicone, stearic amide, antioxidant are added in blender, and measuring tank A is loaded after being stirred, and mixing speed is
200prm, mixing time 4min.
(4) polyformaldehyde and graphene/PA66 master batches are added into mixer in proportion, mixes 3min, mixing speed is
100prm, load measuring tank C.
(5) extrusion blending：Open double screw extruder, by proportioning open A, B, C weighing balance, by each component raw material press than
Example is continuously introduced into double screw extruder melting extrusion, obtains composite through cooling and dicing, its blending extrusion technique is as follows：Under
Material mouth to extruder die head blending extrusion temperature：150 DEG C, 160 DEG C, 160 DEG C, 170 DEG C, 170 DEG C, 180 DEG C, 180 DEG C, 165
DEG C, 150 DEG C；Screw speed：450prm, vacuum：-0.7MPa.
Embodiment 2
A kind of polyformaldehyde composite material, raw material components and parts by weight are as follows：Polyformaldehyde 10kg, carbon fiber 1.5kg are wear-resisting
Agent 0.7kg (aluminum oxide：Molybdenum disulfide：PTFE mass ratioes are 1：2：4), graphene/PA6 master batches 0.3kg, EVOH/ magnesia is answered
Compound 0.1kg (mass ratioes 1：1), the multiple thing 0.1kg (mass ratioes 2 of polymeric silicone/stearic amide：1), novolac epoxy resin
30g, KH55060g, antioxidant 50g, natural rubber 0.3kg.
Preparation method is：(1) surface treatment of carbon fibers：Carbon fiber is put into baking oven, is heated to 400 DEG C, high-temperature oxydation 5 is small
Shi Hou, it is cooled to 80 DEG C and takes out and add in mixer, add novolac epoxy resin 30g, 3min is stirred under 60prm, then add
Enter coupling agent 20g, continue to stir 3min, load measuring tank B.
(2) CNT and metal oxide surface processing：CNT, aluminum oxide, magnesia are added in blender,
One side stirring at low speed stirs 6min, mixing speed 100prm while add coupling agent 40g, standby.
(3) auxiliary agent mixes：By the CNT handled well, aluminum oxide, magnesia and PTFE, natural rubber, EVOH, high score
The auxiliary agents such as sub- silicone, stearic amide, antioxidant are added in blender, and measuring tank A is loaded after being stirred, and mixing speed is
300prm, mixing time 3min.
(4) polyformaldehyde and graphene/PA66 master batches are added into mixer in proportion, mixes 5min, mixing speed is
200prm, load measuring tank C.
(5) extrusion blending：Open double screw extruder, by proportioning open A, B, C weighing balance, by each component raw material press than
Example is continuously introduced into double screw extruder melting extrusion, obtains composite through cooling and dicing, its blending extrusion technique is as follows：Under
Material mouth to extruder die head blending extrusion temperature：150 DEG C, 160 DEG C, 160 DEG C, 170 DEG C, 170 DEG C, 180 DEG C, 180 DEG C, 165
DEG C, 150 DEG C；Screw speed：450prm, vacuum：-0.7MPa.
Embodiment 3
A kind of polyformaldehyde composite material, raw material components and quality are as follows：Polyformaldehyde 10kg, carbon fiber 2.5kg, anti-wear agent
0.5kg (aluminum oxide：PTFE mass ratioes 1：4), graphene/PA6 master batches 0.4kg, PA12/ magnesia compound 0.2kg (quality
Than：1：1), the multiple thing 0.2kg (mass ratioes 2 of polymeric silicone/stearic amide：1), novolac epoxy resin 25g, KH55075g, resist
Oxygen agent 50g, polyurethane 0.2kg.
Preparation method is the same as embodiment 1.
Embodiment 4
A kind of polyformaldehyde composite material, raw material components and quality are as follows：Polyformaldehyde 10kg, carbon fiber 2.5kg, anti-wear agent
0.2kg (aluminum oxide：PTFE mass ratioes are 2：5), graphene/PA6 master batches 0.2kg, PA610/ silica composite 0.15kg (matter
Measure ratio 1：1), the multiple thing 0.15kg (mass ratioes 2 of polymeric silicone/stearic amide：1), novolac epoxy resin 12.5g,
KH55037.5g, antioxidant：80g, nitrile rubber：0.4kg.
Preparation method is the same as embodiment 1.
Embodiment 5
A kind of polyformaldehyde composite material, raw material components and quality are as follows：Polyformaldehyde 10kg, carbon fiber 1.0kg, anti-wear agent
0.1kg (aluminum oxide：PTFE mass ratioes are 1：6), graphene/PA6 master batches 0.1kg, PA12/ zinc oxide composites 0.05kg (matter
Amount ratio：1：1), polymeric silicone/stearic amide compound 0.15kg (mass ratioes：2：1), novolac epoxy resin 30g,
KH55060g, antioxidant 0.1g, nitrile rubber 0.5kg.
Preparation method is the same as embodiment 1.
Embodiment 6
A kind of polyformaldehyde composite material, raw material components and quality are as follows：Polyformaldehyde 10kg, carbon fiber 3.0kg, anti-wear agent
0.8kg (aluminum oxide：Molybdenum disulfide：PTFE mass ratioes are 1：3：4), graphene/PA6 master batches 0.5kg, PA12/ zinc oxide is compound
Thing 0.3kg (mass ratioes 1：1.5), polymeric silicone 0.05kg, novolac epoxy resin 30g, KH55060g, antioxidant 10g, Ding Qing
Rubber 0.1kg.
Preparation method is the same as embodiment 1.
Embodiment 7
A kind of polyformaldehyde composite material, raw material components and quality are as follows：Polyformaldehyde 10kg, carbon fiber 2.0kg, anti-wear agent
0.7kg (aluminum oxide：PTFE mass ratioes are 2：5), graphene/PA6 master batches 0.3kg, PA120.1kg, polymeric silicone 0.01kg,
Novolac epoxy resin 10g, KH55020g, antioxidant 50g, polyamide elastomer 1kg.
Preparation method is with embodiment 1, and as different from Example 1, surface treatment of carbon fibers adds phenolic aldehyde ring in step (1)
Oxygen tree fat 10g, KH5507g；KH55013g is added when CNT and metal oxide surface are handled in step (2).
Performance detection
(1) prepared by batten：With 120G injector sample preparations.Inject extruder screw temperature (DEG C)：150th, 160,165,170,
Mold temperature：60 DEG C, injection pressure：90MPa, dwell pressure：60MPa, dwell time：25s, batten balance 24h.
(2) according to following standard testing various performance parameters：
Tensile strength (MPa)：ASTM D638-2014；
Bending strength (MPa)：ASTM D790-2007；
Bending modulus (MPa)：ASTM D790-2007；
Notch impact strength (kJ/m2)：ASTM D756-1993；
Coefficient of friction：ASTM G99-2004, pressure：625N, speed：30r/min；
Wear away (mg)：ASTM G99-2004, pressure：625N, speed：30r/mim；
Friction Temperature Rise (DEG C)：ASTM G99-2004.
With pure polyformaldehyde as a comparison case, performance detection, testing result such as table are carried out to embodiment 1-7 and comparative example respectively
Shown in 1.
The embodiment 1-7 of table 1 and comparative example performance test results
As it can be seen from table 1 the polyformaldehyde composite material of the present invention, has high intensity super abrasive characteristic, with pure polyformaldehyde
Compare, composite materials property of the invention is improved more than 1 times, and impact strength is more than 3 times of pure polyformaldehyde；The present invention's rubs
The pure polyformaldehyde of coefficient ratio is wiped to lower more than 1 times；Abrasion of the composite of the present invention than pure polyformaldehyde are reduced more than 6 times.Suitable automobile,
Mechanical transmission component, especially composite volatile low molecular compound of the invention are low, are particularly suitable for and food, medical treatment
Mechanical transmission component.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of polyformaldehyde composite material, it is characterised in that the polyformaldehyde composite material includes following raw material components and weight
Number：100 parts of polyformaldehyde, 10~30 parts of carbon fiber, 0.5~5.0 part of CNT, 1.0~10 parts of anti-wear agent, elastomer 1.0
~10 parts, graphene/1.0~5.0 parts of PA6 master batches, 0.5~3.0 part of formaldehyde catching agent, 0.3~1.0 part of surface conditioning agent, profit
0.1~2.0 part of lubrication prescription, 0.1~1.0 part of antioxidant.
2. polyformaldehyde composite material as claimed in claim 1, it is characterised in that the carbon fiber is chopped strand, length 2
~4mm, strength grade are T700~T1000, and strand specification is 6k~24k, and filament diameter is 5~8 μm.
3. polyformaldehyde composite material as claimed in claim 1, it is characterised in that the CNT is selected from hydroxylating carbon nanometer
One kind in pipe, carboxylic carbon nano-tube, aminated carbon nano tube.
4. polyformaldehyde composite material as claimed in claim 1, it is characterised in that graphene contains in the graphene/PA6 master batches
Measure as 10%.
5. polyformaldehyde composite material as claimed in claim 1, it is characterised in that any one or more also included the following features
：
One or more of the anti-wear agent in aluminum oxide, graphite, molybdenum disulfide, polytetrafluoroethylene (PTFE)；
The elastomer is selected from thermoplastic elastic body；
One or more of the formaldehyde catching agent in metal oxide, organic polymer；
The surface conditioning agent includes novolac epoxy resin and silane coupler.
A kind of 6. method for preparing the polyformaldehyde composite material as described in any one of claim 1 to 5, it is characterised in that including with
Lower step：
(1) raw material components are surface-treated using surface conditioning agent；
(2) CNT, formaldehyde catching agent and the anti-wear agent after step (1) processing, lubricant, elastomer, antioxidant are pressed
Ratio is well mixed；
(3) polyformaldehyde, graphene/PA6 master batches are well mixed；
(4) compound that the compound and step (3) of carbon fiber, step (2) after step (1) is handled obtain is in proportion
Add in extruder and carry out extruding pelletization, produce polyformaldehyde composite material.
7. method as claimed in claim 6, it is characterised in that table is carried out to carbon fiber using surface conditioning agent in step (1)
Face is handled, and method is：After carbon fiber heating is aoxidized into 2~5h, cool down and add in mixer, be proportionally added into surface treatment
Agent, stir 3~10min.
8. method as claimed in claim 6, it is characterised in that carried out in step (1) using surface conditioning agent to CNT
Surface treatment, method are：CNT, surface conditioning agent are mixed in proportion, stir 3~6min.
9. method as claimed in claim 6, it is characterised in that extrusion temperature is 150~180 DEG C in step (4), vacuum
For -0.06~-0.09MPa, rotating speed is 400~500prm.
10. polyformaldehyde composite material is set in light industry and food machinery, medicine equipment, medicine as described in any one of claim 1 to 5
The purposes of standby, transmission parts, automobile bearing and driving cog field.
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| CN201711015289.4A CN107759964A (en) | 2017-10-25 | 2017-10-25 | A kind of polyformaldehyde composite material and its production and use |
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