CN107022114B - A kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material and preparation method - Google Patents
A kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material and preparation method Download PDFInfo
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
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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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
The present invention relates to graphene composite material application fields, and in particular to a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material and preparation method.By being completely dispersed fluoropolymer disperse particles, graphene with mist, it is instantaneously heated using laser and gas shock, under extremely short melting range, the softening of fluoropolymer disperse particles surface, nodularization are bonded graphene immediately, sphericity height complete so as to form dispersion, graphene bonding are uniformly with the high fluidity microballoon of shell-core structure.The dedicated parent material of the graphene microballoon mother material as ultra-high molecular weight polyethylene melt-processed, fluoropolymer has preferable melt-processed mobility with microspheres form auxiliary ultra-high molecular weight polyethylene, graphene in fluoropolymer microsphere surface by being bonded to form shell-core structure simultaneously, so that graphene has good dispersibility in ultra-high molecular weight polyethylene molten mass.
Description
Technical field
The present invention relates to graphene composite material application fields, and in particular to a kind of ultra-high molecular weight polyethylene special graphite
Alkene microballoon mother material and preparation method.
Background technique
Ultra-high molecular weight polyethylene (UHMWPE) is often referred to polyethylene of the viscosity average molecular weigh 1,000,000-300 ten thousand, has excellent
A variety of excellent spies such as different impact resistance, wear-resistant, chemical stabilization, water-fast, fast light, endurance, wear-resistant, resist bending, low temperature resistant
Property, it is commonly used in High-strength durable product.In particular, ultra high molecular weight polyethylene fiber is in shellproof, energy-absorbing, high-tenacity rope
It is used widely in the fields such as cable, security textile, engineering reinforcement, information, new energy, medical treatment, Leisure Sport, it has also become high-tech
The important new material in skill field, with carbon fiber, aramid fiber and referred to as three big high-performance fibers.
Due to the molecular structure high-sequential of ultra-high molecular weight polyethylene, non-polar group, nothing on fiber macromolecular chain
Chemical activity, and surface can be lower.Therefore, fiber is being used as bullet resistant material, hawser, protective materials in use, impact resistance, resistance to
Mill property and creep-resistant property are inadequate, it is still desirable to modified.
Graphene is the highest substance of mankind's known strength, not only has the function of winding enhancing to high molecular material, and
And there is excellent anti-wear, toughness.By graphene be used to improve the impact resistance of ultra-high molecular weight polyethylene, wearability and
Creep-resistant property becomes an emerging technological approaches.It will assign ultra-high molecular weight polyethylene performance beyond imagination.
In addition, currently, production ultra high molecular weight polyethylene fiber mostly uses wet spinning, it is suitable organic molten by selecting
Agent, dissolution viscosity average molecular weigh are greater than 1,000,000 polyvinyl resin with super-high molecular weight, spray by the intracorporal spinneret of manifold
Afterwards, cooled and solidified forms gel fiber.In consideration of it, Chinese invention patent CN105420833A discloses a kind of graphene supra polymer
Weight northylen hybridized fiber, by by oleophylic modified graphene or graphene oxide dispersion and ultra-high molecular weight polyethylene paraffin
Oiliness spinning solution co-blended spinning, so that fibrous matrix intensity improves, creep resistant, heat resistance are improved.However, due to Wet-spinning
Silk joined more organic solvent, needs the devolatilization after ultra-high molecular weight polyethylene spinning, easily pollutes the environment.And
The wet spinning being completely dissolved easily causes the solution of ultra-high molecular weight polyethylene molecular chain to twine and is even broken, to influence the strong of spinning
Degree.
The strand of ultra high molecular weight polyethylene fiber, the fibre strength of preparation can preferably be retained by melt spinning
It is high.But melt viscosity is high when due to ultra-high molecular weight polyethylene melt-processed, and mobility is very poor, and melt flow index is almost
It is zero, so being difficult directly to carry out melting extrusion spinning.If dispersing super high molecular weight under melting condition for graphene to gather
In ethylene, dispersion difficulty is very big, even if dispersion, also because dispersion unevenness is difficult to achieve the purpose that enhancing.
Summary of the invention
In order to realize ultra-high molecular weight polyethylene melt-processed, and by graphene under melting condition high efficiency dispersion in superelevation
In molecular weight polyethylene, the present invention proposes a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material.The graphene microballoon
Masterbatch outstanding feature is a kind of high fluidity microballoon with shell-core structure, and the shell is graphene layer, and the core is fluorine
Polymer microballoon.Fluoropolymer has preferable melt-processed mobility with microspheres form auxiliary ultra-high molecular weight polyethylene, together
When graphene by fluoropolymer microsphere surface formed shell so that graphene is in ultra-high molecular weight polyethylene molten mass
With good dispersibility.The PP Pipe Compound of the graphene microballoon mother material as ultra-high molecular weight polyethylene melt-processed, is not only assigned
Give ultra-high molecular weight polyethylene melt processable, be most importantly substantially improved ultra-high molecular weight polyethylene impact resistance,
Wearability and creep-resistant property.
Further, the present invention provides a kind of preparation methods of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material.
To solve the above problems, the invention adopts the following technical scheme:
A kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material, it is characterised in that: the graphene microballoon mother material
It is a kind of high fluidity microballoon with shell-core structure, the shell is graphene layer, and the core is fluoropolymer microballoon.
Preferably, the fluoropolymer is ethylene-tetrafluoroethylene copolymer, in polytetrafluoroethylene (PTFE), perfluoroalkoxy resin
One kind.
A kind of preparation method of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material, which is characterized in that including following
Step:
(1) fluoropolymer is ground to partial size is the micro mist within 2 μm, and surfactant is then added and carries out high speed point
It dissipates, obtains fluoropolymer disperse particles；
(2) spheroidization device is opened, spheroidization device is spherical reactor, and middle part is oppositely arranged two feed nozzles A and B, bottom
Laser heater is arranged in portion's setting condensation collecting chamber, spheroidization device；Step (2) is obtained into fluoropolymer disperse particles and applies high pressure
Gas is completely dispersed it from nozzle A with mist and enters spheroidization device；Graphene is applied into high pressure gas, makes it with mist
Shape form, which is completely dispersed from nozzle B, enters spheroidization device；Fluoropolymer disperse particles are completely in particulate form in spheroidization device
Dispersion, stimulated light quickly heats and gas shock, and microparticle surfaces softening simultaneously nodularization, fully decentralized graphene thermal is bonded in fluorine
Polymer disperse particles surface, being formed by shell, fluoropolymer of graphene layer is the microballoon of core；
(3) microballoon that step (2) obtains instantaneously falls, the condensation collecting chamber being arranged into spheroidization device bottom, through high speed
Whirlwind condensation, which is collected, obtains a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material.
Preferably, step (1) surfactant is the conventional surfactant with divergent function, such as hexa metaphosphoric acid
One of sodium, neopelex, lauryl sodium sulfate, sodium pyrophosphate, Sodium Polyacrylate.
Preferably, step (2) the surfactant usage amount is the 1-3% of the fluoropolymer quality.
Preferably, the fluoropolymer disperse particles that step (2) is sprayed into from nozzle A and the graphene sprayed into from nozzle B are preferable
Fit quality be 5-15:1.
Preferably, high pressure gas described in step (2) is supercritical carbon dioxide.It is poly- to fluorine by supercritical carbon dioxide
The conveying for closing object disperse particles, forms it into high score granular media, the adhesion effectivelying prevent between fluoropolymer disperse particles；By super
Conveying of the critical carbon dioxide to graphene discharges big energy and overcomes active force between graphene, graphene aggregate is dispersed,
So that graphene is Nian Jie with fluoropolymer disperse particles in the form of single layer or few layer.
Preferably, spheroidization device described in step (2), is arranged downward airflow apparatus at the top of spheroidization device.It is poly- in fluorine
The heating of conjunction object disperse particles stimulated light, surface soften nodularization and when surface are bonded graphene, are arranged at the top of spheroidization device downward
Airflow apparatus, the time of fluoropolymer disperse particles easy to control heating.Laser is heated to be instantaneous quickly heating, on the one hand, swashs
Light heats the surface heated fast for ensuring fluoropolymer disperse particles, on the other hand, preferably ensures that fluoropolymer dispersion is micro-
Grain surface is heated evenly, to be easy to surface nodularization, Nian Jie with graphene uniform.Not because of fluoropolymer disperse particles material
Together, the time of surface softening is different, according to material difference, by the way that downward airflow apparatus, control are arranged at the top of spheroidization device
It is sent into the time of gas pressure size control fluoropolymer disperse particles heating.
Preferably, high speed whirlwind described in step (3) condenses, and liquid nitrogen is best to be passed through, by the rapid condensation of liquid nitrogen, compared with
The good deformation for preventing microballoon and microballoon bonding aggregation.
By the way that polymer particles to be heated and softened to the technology of nodularization, it is possible to be used in this field.However, we are frightened
Surprise is the discovery that for the present invention when using laser heating, the surface of fluoropolymer disperse particles is heated quickly and uniform, into one
Step, under the conditions of high-pressure fog, fluoropolymer disperse particles are in dispersity, and the melting range of softening is extremely short, the fluorine polymerization of softening
Object disperse particles surface is bonded graphene immediately, has prevented the connection between microballoon, forms the microballoon that dispersion is complete, sphericity is high.
A kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material of the present invention and preparation method, by spheroidization device
In be completely dispersed fluoropolymer disperse particles, graphene with mist, instantaneously heated using laser and gas shock, what is be exceedingly fast
Under melting range, the softening of fluoropolymer disperse particles surface, nodularization are bonded graphene immediately, it is complete so as to form dispersion, spherical
Degree is high, graphene is bonded high fluidity microballoon uniformly with shell-core structure.The graphene microballoon mother material is as supra polymer
The dedicated parent material of weight northylen melt-processed, fluoropolymer have preferable molten with microspheres form auxiliary ultra-high molecular weight polyethylene
Melt processing fluidity, while graphene is in fluoropolymer microsphere surface by being bonded to form shell-core structure, so that graphene
There is good dispersibility in ultra-high molecular weight polyethylene molten mass.The graphene microballoon mother material is as superhigh molecular weight polyethylene
The PP Pipe Compound of alkene melt-processed not only assigns ultra-high molecular weight polyethylene melt processable, is most importantly substantially improved super
Impact resistance, wearability and the creep-resistant property of High molecular weight polyethylene.Particularly, graphene microballoon mother material assigns supra polymer
Weight northylen melt processable is suitable for the melt spinning of ultra-high molecular weight polyethylene.
A kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material of the present invention and preparation method, with prior art phase
Than the feature and excellent effect protruded is:
1, the PP Pipe Compound of the graphene microballoon mother material as ultra-high molecular weight polyethylene melt-processed not only assigns superelevation point
Sub- weight northylen melt processable, most importantly by the shell-core for forming graphene and fluoropolymer, so that graphene
Dispersion in ultra-high molecular weight polyethylene is excellent, and the impact resistance of ultra-high molecular weight polyethylene, wearability and anti-is substantially improved
Croop property.
2, when the heating of the invention using laser, the surface of fluoropolymer disperse particles is heated quickly and uniform, further
, under the conditions of high-pressure fog, fluoropolymer disperse particles are in dispersity, and the melting range of softening is extremely short, the fluorine polymerization of softening
Object disperse particles surface is bonded graphene immediately, has prevented the connection between microballoon.To form high dispersive, sphericity height, graphite
Alkene is bonded uniform microballoon.
3, preparation method of the present invention is high-efficient, and equipment is simple, without using solvent etc., belongs to pollution-free preparation process, is suitble to
In large-scale production and application.
Detailed description of the invention
Fig. 1 is that the graphene microballoon mother material that embodiment 1 obtains is existed with the ultra-high molecular weight polyethylene of 8% mass ratio and 92%
Scanning electron microscope (SEM) photograph after being kneaded in screw rod.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
(1) ethylene-tetrafluoroethylene copolymer is ground to partial size is the micro mist within 2 μm, and surfactant is then added
Sodium pyrophosphate carries out high speed dispersion, obtains ethylene-tetrafluoroethylene copolymer disperse particles；Surfactant usage amount is ethylene-
The 1% of TFE copolymer quality；
(2) spheroidization device is opened, spheroidization device is spherical reactor, and middle part is oppositely arranged two feed nozzles A and B, bottom
Laser heater is arranged in portion's setting condensation collecting chamber, spheroidization device；Step (2) is obtained into ethylene-tetrafluoroethylene copolymer dispersion
Particle applies supercritical carbon dioxide, is completely dispersed it from nozzle A with mist and enters spheroidization device；Graphene is applied
Supercritical carbon dioxide is completely dispersed it from nozzle B with mist and enters spheroidization device；The ethylene-four in spheroidization device
Fluoride copolymers disperse particles disperse in particulate form completely, and stimulated light quickly heats and gas shock, microparticle surfaces are soft
Change and nodularization, fully decentralized graphene thermal are bonded in ethylene-tetrafluoroethylene copolymer disperse particles surface, is formed with graphene
Layer is shell, the microballoon that ethylene-tetrafluoroethylene copolymer is core；The ethylene-tetrafluoroethylene copolymer disperse particles sprayed into from nozzle A
Preferable fit quality is 10:1 with the graphene that sprays into from nozzle B；
(3) by the way that downward airflow apparatus is arranged at the top of spheroidization device, it is 0.01MPa, control that gas pressure is sent into control
The time of ethylene-tetrafluoroethylene copolymer disperse particles heating；Microballoon is instantaneously fallen by air pressure, is arranged into spheroidization device bottom
Condensation collecting chamber, through high speed whirlwind condensation collect obtain a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material.
The graphene microballoon mother material that embodiment 1 is obtained is with 8% mass ratio and 92% ultra-high molecular weight polyethylene (molecular weight
1,500,000 or more) mixing granulator in screw rod, by scanning electron microscope observation (shown in attached drawing 1), graphene microballoon mother material uniformly divides
It dissipates in ultra-high molecular weight polyethylene.Its processing performance, mechanical property and melt spinning property are further tested, as shown in table 1.Its
With good processing fluidity, mechanical property and stable melt spinning performance.
Embodiment 2
(1) polytetrafluoroethylene (PTFE) is ground to partial size is the micro mist within 2 μm, and surfactant hexa metaphosphoric acid is then added
Sodium carries out high speed dispersion, obtains polytetrafluoroethylene (PTFE) disperse particles；Surfactant usage amount is the 2% of polytetrafluoroethylene (PTFE) quality；
(2) spheroidization device is opened, spheroidization device is spherical reactor, and middle part is oppositely arranged two feed nozzles A and B, bottom
Laser heater is arranged in portion's setting condensation collecting chamber, spheroidization device；It is super that step (2) is obtained into the application of polytetrafluoroethylene (PTFE) disperse particles
Critical carbon dioxide is completely dispersed it from nozzle A with mist and enters spheroidization device；Graphene is applied into overcritical dioxy
Change carbon, is completely dispersed it from nozzle B with mist and enters spheroidization device；The polytetrafluoroethylene (PTFE) disperse particles in spheroidization device
Disperse in particulate form completely, stimulated light quickly heats and gas shock, microparticle surfaces softening and nodularization, fully decentralized stone
For black alkene heat bonding on polytetrafluoroethylene (PTFE) disperse particles surface, being formed by shell, polytetrafluoroethylene (PTFE) of graphene layer is the microballoon of core；From
The polytetrafluoroethylene (PTFE) disperse particles that nozzle A the is sprayed into fit quality preferable with the graphene sprayed into from nozzle B is 8:1；
(3) by the way that downward airflow apparatus is arranged at the top of spheroidization device, it is 0.005MPa, control that gas pressure is sent into control
The time of polytetrafluoroethylene (PTFE) disperse particles heating；Microballoon is instantaneously fallen by air pressure, and the condensation being arranged into spheroidization device bottom is received
Collect room, is collected through high speed whirlwind condensation and obtain a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material.In spheroidization device
Downward airflow apparatus is arranged in top.It is bonded in the heating of fluoropolymer disperse particles stimulated light, surface softening nodularization and on surface
When graphene, downward airflow apparatus, the time of fluoropolymer disperse particles heating easy to control are set at the top of spheroidization device.Laser
It is heated to be instantaneous quickly heating, on the one hand, laser heats the surface heated fast for ensuring fluoropolymer disperse particles, another party
Face preferably ensures that fluoropolymer disperse particles surface is heated evenly, thus be easy to surface nodularization, it is Nian Jie with graphene
It is even.Because of the difference of fluoropolymer disperse particles material, the time of surface softening is different, according to material difference, is filled by nodularization
Downward airflow apparatus is arranged in top set portion, and the time of gas pressure size control fluoropolymer disperse particles heating is sent into control.
The graphene microballoon mother material that embodiment 2 is obtained is with 8% mass ratio and 92% ultra-high molecular weight polyethylene (molecular weight
1,500,000 or more) mixing granulator in screw rod, its processing performance, mechanical property and melt spinning property are further tested, such as table 1
It is shown.It is with good processing fluidity, mechanical property and stable melt spinning performance.
Embodiment 3
(1) partial size will be ground in perfluoroalkoxy resin is the micro mist within 2 μm, and surfactant ten is then added
Dialkyl benzene sulfonic acids sodium carries out high speed dispersion, obtains perfluoroalkoxy resin disperse particles；Surfactant usage amount is perfluor
The 3% of alkoxy resin quality；
(2) spheroidization device is opened, spheroidization device is spherical reactor, and middle part is oppositely arranged two feed nozzles A and B, bottom
Laser heater is arranged in portion's setting condensation collecting chamber, spheroidization device；Step (2) is obtained perfluoroalkoxy resin disperse particles to apply
Plus-pressure is the air-flow of 0.1MPa, is completely dispersed it from nozzle A with mist and enters spheroidization device；Graphene is applied and is pressed
Power is the air-flow of 0.1MPa, is completely dispersed it from nozzle B with mist and enters spheroidization device；The perfluor alkane in spheroidization device
Oxygroup resin dispersion particle disperses in particulate form completely, and stimulated light quickly heats and gas shock, and microparticle surfaces soften simultaneously
Nodularization, fully decentralized graphene thermal are bonded in perfluoroalkoxy resin disperse particles surface, are formed using graphene layer as shell, entirely
Fluoroalkyloxy resin is the microballoon of core；The perfluoroalkoxy resin disperse particles sprayed into from nozzle A and the graphite sprayed into from nozzle B
The preferable fit quality of alkene is 15:1；
(3) by the way that downward airflow apparatus is arranged at the top of spheroidization device, it is 0.01MPa, control that gas pressure is sent into control
The time of perfluoroalkoxy resin disperse particles heating；Microballoon is instantaneously fallen by air pressure, is arranged into spheroidization device bottom cold
Solidifying collecting chamber is collected through high speed whirlwind condensation and obtains a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material.
The graphene microballoon mother material that embodiment 3 is obtained is with 8% mass ratio and 92% ultra-high molecular weight polyethylene (molecular weight
1,500,000 or more) mixing granulator in screw rod, its processing performance, mechanical property and melt spinning property are further tested, such as table 1
It is shown.It is with good processing fluidity, mechanical property and stable melt spinning performance.
Embodiment 4
(1) ethylene-tetrafluoroethylene copolymer is ground to partial size is the micro mist within 2 μm, and surfactant is then added
Sodium Polyacrylate carries out high speed dispersion, obtains fluoropolymer disperse particles；Surfactant usage amount is total for ethylene-tetrafluoroethylene
The 3% of polymers quality；
(2) spheroidization device is opened, spheroidization device is spherical reactor, and middle part is oppositely arranged two feed nozzles A and B, bottom
Laser heater is arranged in portion's setting condensation collecting chamber, spheroidization device；Step (2) is obtained into ethylene-tetrafluoroethylene copolymer dispersion
Particle applies supercritical carbon dioxide, is completely dispersed it from nozzle A with mist and enters spheroidization device；Graphene is applied
Supercritical carbon dioxide is completely dispersed it from nozzle B with mist and enters spheroidization device；The ethylene-four in spheroidization device
Fluoride copolymers disperse particles disperse in particulate form completely, and stimulated light quickly heats and gas shock, microparticle surfaces are soft
Change and nodularization, fully decentralized graphene thermal are bonded in ethylene-tetrafluoroethylene copolymer disperse particles surface, is formed with graphene
Layer is shell, the microballoon that ethylene-tetrafluoroethylene copolymer is core；The ethylene-tetrafluoroethylene copolymer disperse particles sprayed into from nozzle A
Preferable fit quality is 10:1 with the graphene that sprays into from nozzle B；
(3) by the way that downward airflow apparatus is arranged at the top of spheroidization device, it is 0.05MPa, control that gas pressure is sent into control
The time of ethylene-tetrafluoroethylene copolymer disperse particles heating；Microballoon is instantaneously fallen by air pressure, is arranged into spheroidization device bottom
Condensation collecting chamber, through high speed whirlwind condensation collect obtain a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material.
The graphene microballoon mother material that embodiment 4 is obtained is with 8% mass ratio and 92% ultra-high molecular weight polyethylene (molecular weight
1,500,000 or more) mixing granulator in screw rod, its processing performance, mechanical property and melt spinning property are further tested, such as table 1
It is shown.It is with good processing fluidity, mechanical property and stable melt spinning performance.
Table 1:
| Test item | Processing fluidity (g/10min, 270 DEG C)) | Tensile strength (MPa) | Elongation at break (%) | Fibre strength (N/dtex) |
| Ultra-high molecular weight polyethylene (molecular weight is 1,500,000 or more) | 0.1 | 52 | 32 | -- |
| Add the ultra-high molecular weight polyethylene of 8% embodiment, 1 graphene microballoon mother material | 3.5 | 77 | 95 | 19 |
| Add the ultra-high molecular weight polyethylene of 8% embodiment, 2 graphene microballoon mother material | 3.2 | 71 | 85 | 21 |
| The ultra-high molecular weight polyethylene of 3 graphene microballoon mother materials is implemented in addition 8% | 3.0 | 69 | 96 | 22 |
| Add the ultra-high molecular weight polyethylene of 8% embodiment, 4 graphene microballoon mother material | 2.9 | 73 | 100 | 20 |
Claims (8)
1. a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material, it is characterised in that: the graphene microballoon mother material is
A kind of high fluidity microballoon with shell-core structure, the shell are graphene layer, and the core is fluoropolymer microballoon；
The graphene microballoon mother material, is prepared by following methods:
(1) fluoropolymer is ground to partial size is the micro mist within 2 μm, and surfactant is then added and carries out high speed dispersion, obtains
To fluoropolymer disperse particles；
(2) spheroidization device is opened, spheroidization device is spherical reactor, and middle part is oppositely arranged two feed nozzles A and B, and bottom is set
Condensation collecting chamber is set, laser heater is arranged in spheroidization device；Step (1) is obtained into fluoropolymer disperse particles and applies high pressure gas
Body is completely dispersed it from nozzle A with mist and enters spheroidization device；Graphene is applied into high pressure gas, makes it with mist
Form, which is completely dispersed from nozzle B, enters spheroidization device；Fluoropolymer disperse particles divide in particulate form completely in spheroidization device
It dissipates, stimulated light quickly heats and gas shock, and microparticle surfaces softening and nodularization, it is poly- that fully decentralized graphene thermal is bonded in fluorine
Object disperse particles surface is closed, being formed by shell, fluoropolymer of graphene layer is the microballoon of core；
(3) microballoon that step (2) obtains instantaneously falls, the condensation collecting chamber being arranged into spheroidization device bottom, through high speed whirlwind
Condensation collects and obtains a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material.
2. a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material according to claim 1, it is characterised in that: described
Fluoropolymer is one of ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene (PTFE), perfluoroalkoxy resin.
3. a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material according to claim 1, it is characterised in that: step
(1) surfactant is calgon, neopelex, lauryl sodium sulfate, sodium pyrophosphate, polypropylene
One of sour sodium.
4. a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material according to claim 1, it is characterised in that: step
(1) the surfactant usage amount is the 1-3% of the fluoropolymer quality.
5. a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material according to claim 1, it is characterised in that: step
(2) the fluoropolymer disperse particles sprayed into from nozzle A are 5-15:1 with the graphene fit quality sprayed into from nozzle B.
6. a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material according to claim 1, it is characterised in that: step
(2) high pressure gas described in is supercritical carbon dioxide.
7. a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material according to claim 1, it is characterised in that: step
(2) downward airflow apparatus is arranged in the spheroidization device described at the top of spheroidization device.
8. a kind of ultra-high molecular weight polyethylene special graphite alkene microballoon mother material according to claim 1, it is characterised in that: step
(3) the high speed whirlwind condensation described in, is passed through liquid nitrogen, by the rapid condensation of liquid nitrogen, prevents the deformation and microballoon bonding of microballoon
Aggregation.
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| CN107022114B true CN107022114B (en) | 2018-12-07 |
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