CN107474499A - A kind of heat conductive flame-retarding PET/PBT composites and the lamp holder being made from it - Google Patents
A kind of heat conductive flame-retarding PET/PBT composites and the lamp holder being made from it Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
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- C09K5/08—Materials not undergoing a change of physical state when used
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The present invention relates to a kind of heat conductive flame-retarding PET/PBT composites, including following component and parts by weight：PET 30% 40%；PBT 5% 10%；Core-shell type activated carbon intercalated graphite alkene 0.5% 2%；Glass fibre 15% 30%；Thermal conducting agent 15% 30%；Lubricant 0.3% 0.8%；Toughener 3% 5%；Synergistic flame retardant 2% 3%；Fire retardant 7% 10%；Processing aid 0.3% 1%.Wherein, core-shell type activated carbon intercalated graphite alkene is using activated carbon intercalated graphite alkene as stratum nucleare, and the cross-linked structure condensate that cladding connects the stratum nucleare is shell, and the component and mass fraction that each structure sheaf includes are as follows：Graphene 10 50%；Activated carbon 10 45%；Cross-linked structure condensate 5 47%；Wherein, the cross-linked structure condensate triggers the condensate with three-dimensional crosslinked network structure for polymerizeing and being crosslinked by polymerized monomer, initiator and crosslinking agent.
Description
Technical field
The present invention relates to functional material preparing technical field, more particularly to a kind of heat conductive flame-retarding PET/PBT composites and
Its preparation method and application.
Background technology
In recent years, conventional project plastics, including thermoplasticity and thermosetting plastics, because it has good mechanical property, chemistry is surely
It is fixed, the advantage such as electric insulation, it is widely used in daily electrical equipment, is such as used as lamp holder.Wherein, poly terephthalic acid second
Diol ester (PET) is the plastics that cost performance is best in engineering material, and PET is milky or polymerization that is light yellow and being highly crystalline
Thing, smooth surface is glossy, has excellent physical and mechanical properties within the scope of wider temperature, and long-term use of temperature can reach
120 DEG C, electrical insulating property is excellent, meanwhile, its creep resistance, fatigue durability and rub resistance performance are good, but its corona resistance compared with
Difference, and because PET belongs to combustible, and thermal conductivity factor is low (about 0.2W/m.K), make it needs are fire-retardant and art of heat transfer
Using being extremely limited, uses of such as PET in light fixture, lamp holder.
Polybutylene terephthalate (PBT) (PBT) is thermoplastic polyester, is a kind of faster engineering thermoplastic of crystallization rate
Plastics, there is excellent solvent resistance, fluidity of molten is good, and with excellent electric properties, water imbibition is small, surface is good etc.
Advantage, it is widely used in the industries such as electric, automobile, household electrical appliance, but PBT glass transition temperature is low, and high temperature rigid is not
Foot.Therefore, PET and PBT are subjected to blending and modifying, the shortcomings that overcoming PBT poor heat resistances, while make up PET processing and forming type
With the deficiency of water imbibition.But blending and modifying is again without solving current conventional project plastics such as PET, PBT that there is thermal conductivity
Insufficient technical problem that can be with fire resistance.
However, with the high power of all kinds of light fixtures, light fixture can generate heat and then produce high temperature in use, cause it
Reliability reduces, and conventional engineering plastics use as lamp holder, but because its thermal conductivity factor is low, belongs to the non-conductor of heat,
Therefore, engineering plastics itself can not solve high radiating so that the problem of heat is effectively discharged, it is also possible to so that using the lamp
The light fixture of pedestal is due to overheat, so as to which the life-span of light fixture or operational efficiency be greatly lowered.
To solve the technical problem of foregoing engineering plastics self-radiating effect difference, Ma Jieling is raising heat-conductive composite material
Heat conductivility and mechanical property, to meet the requirement of light fixture, in its academic dissertation《The research of LED heat-conducting plastic》
In, using PBT as matrix, using magnesia and boron nitride as heat filling, add ethylene-vinyl acetate copolymer and glass fibre pair
It carries out activeness and quietness processing, is prepared for heat-conductive composite material using double screw extruder, improves the heat conduction of the composite
Property, but heat conductivility deficiency be present in it, and do not possess the technical problem of fire resistance.
In addition, household electrical appliance normally there are flame-retardancy requirements to PBT material, the engineering plastic used as lamp holder is often required that
Material has high level flame-retarding characteristic, for example reaches UL94V0 flame-retardant standards, however, conventional engineering plastics such as thermoset epoxy
Resin, PBT etc., its fire-retardant rank are relatively low.At present, flame-retardant modified main use of engineering plastics is added in resin system
Certain fire retardant, including all kinds of halogen-containing flame retardants, phosphorus type flame retardant and inorganic hydroxide fire retardant etc., wherein,
Although halogen-containing flame retardant good flame retardation effect, due to containing halogen, gradually replaced at present by other flame-retardant systems, it is such as Phosphorus
Fire retardant, inorganic hydroxide fire retardant.Patent of invention if notification number is CN102477215B discloses a kind of heat conductive flame-retarding
Polyethylene terephthalate composite and preparation method thereof, including component and part be：Poly terephthalic acid
Glycol ester 30-50, thermal conducting agent 20-40, fire retardant 12-15, fire retarding synergist 6-8, toughener 5-10, coupling agent 0.5-2, resist
Oxidant 0.3-0.5, processing aid 0.5-1, the composite being prepared have excellent heat conductivility and fire resistance, together
When also have good mechanical property, can be widely applied to the electronics higher to cooling requirements, electric component, widened PET in electricity
The application in the fields such as sub- electrical equipment, automobile, household electrical appliance.Foregoing flame retardants belong to bad heat conductor, and therefore, fire retardant adds
Though entering the fire-retardant rank and flame retardant effect on the one hand improving polymer, the radiating work(of polymer is reduced but then
Energy.
However, graphene appears in scientific circles and its huge great waves, it has been found that graphene has very ordinary
Electric conductivity, in graphene, electronics can be migrated extremely efficiently, and traditional semiconductor and conductor, as silicon and copper are remote
It is inferior to graphene.To find out its cause, graphene (Graphene) is the two dimension for the freely one layer of atomic thickness being made up of carbon atom
Crystal, there is perfect two dimensional crystal structure, its lattice is the hexagon surrounded by six carbon atom, and thickness is an atom
Layer, by σ key connections between carbon atom, combination is sp2 hydridization, and these σ keys assign graphene extremely excellent mechanical property
And structural rigidity, the hardness of graphene is stronger than best steel 100 times, and each carbon atom has a non-bonding in graphene
P electronics, these p electronics can move freely in crystal, and movement velocity is up to the 1/300 of the light velocity, and it is good to assign graphene
Good electric conductivity, graphene are the transparent conductive materials of a new generation.In addition, it has been found that with other mineral based material phases
Than grapheme material has excellent heat-resisting and flame-retarding characteristic.
Excellent flame characteristic based on foregoing graphene, domestic researcher enter graphene and polymerized monomer material
Row compounding, to improve the anti-flammability of polymer.Such as：
Publication No. CN106751580A patent of invention provides a kind of LED electrochemical oxidation carbon fiber-graphenes
Fire-retardant plastic of high heat conduction and preparation method thereof is filled, its preparation technology is as follows：With magnesia, boron nitride, PBT, EVA, glass
Fiber, 107 glue, dibutyl tin laurate, tetraethyl orthosilicate, melamine cyanurate, Firebrake ZB, hypo-aluminum orthophosphate, bamboo charcoal,
Nano silicon, dihydroxy dibutyl tin oxide, graphene oxide, carbon fiber, azodicarbonamide, cumyl peroxide etc.
For raw material, a kind of LED is obtained and has filled the fire-retardant plastic of high heat conduction with electrochemistry carbon fiber-graphene.
Publication No. CN106009419A patent of invention provides a kind of novel graphite alkene smoke resistance flame resistance PVC and its preparation
Method, raw material are graphene, PVC, tricresyl phosphate, antimony oxide, brown iron oxide, Firebrake ZB, epoxidized soybean oil, carbonic acid
Calcium and chlorinated paraffin, fire resistance is good, and Vicat softening point is 110-120 DEG C, from fiery self-extinguishment.
In summary, thermal conducting agent is simply used in currently available technology improvement is used as by blending and modifying with polymerized monomer
The heat dispersion approach of polymer, although improving the thermal diffusivity of polymer to a certain extent, heat conductivility still be present not
The problem of sufficient, on the other hand, although improving the fire-retardant rank and flame retardant effect of polymer in polymerized monomer addition fire retardant,
On the other hand the heat sinking function of polymer is but reduced.In addition, graphene belongs to excellent electric conductor, directly graphene is added
It is blended into polymerized monomer so that obtained composite has safety problem.Simultaneously as graphene, which exists, is easy to what is reunited
Feature, therefore, directly making an addition to graphene in polymerized monomer can cause to be not easy the problem of scattered, so as to have a strong impact on composite wood
The fire resistance and mechanical property of material.
Based on technical problem present in foregoing currently available technology, the present invention provides a kind of heat conductive flame-retarding PET/PBT
Composite and preparation method thereof, the technical problem present in polymer process is applied to solve current graphene.
The content of the invention
There is excellent heat conductivility, fire resistance, security performance and scattered it is an object of the invention to provide a kind of
The core-shell type activated carbon intercalated graphite alkene of property and its use in polymerized monomer, meanwhile, the caryogram activated carbon intercalated graphite
Alkene has synergistic function to thermal conducting agent, fire retardant, make up because thermal conducting agent, fire retardant addition cause polymer performance not
Foot, graphene dispersion inequality technical problem and existing conduction present in polymer process are used in solve current graphene
The safety related technical problems of hidden danger.
In order to realize above-mentioned target, the technical solution adopted by the present invention is：Described heat conductive flame-retarding PET/PBT composite woods
Material, including following component and parts by weight：
PET 30%-40%；
PBT 5%-10%；
Core-shell type activated carbon intercalated graphite alkene 0.5%-2%；
Glass fibre 15%-30%；
Thermal conducting agent 15%-30%；
Lubricant 0.3%-0.8%；
Toughener 3%-5%；
Synergistic flame retardant 2%-3%；
Fire retardant 7%-10%；
Processing aid 0.3%-1%.
On the basis of above-mentioned technical proposal, the core-shell type activated carbon intercalated graphite alkene using activated carbon intercalated graphite alkene as
Stratum nucleare, the cross-linked structure condensate that cladding connects the stratum nucleare is shell, is respectively tied in the core-shell type activated carbon intercalated graphite alkene
The component and mass fraction that structure layer includes are as follows：
Graphene 10-50%；
Activated carbon 10-45%；
Cross-linked structure condensate 5-47%.
Wherein, the cross-linked structure condensate triggers polymerization, and crosslinked dose of crosslinking to form by polymerized monomer, initiator
The condensate with three-dimensional crosslinked network structure, by mass percentage, the dosage of the initiator is polymerized monomer
0.01-2%；The dosage of the crosslinking agent is the 0.05-5% of polymerized monomer.
As further preferred scheme, the graphene is in graphene oxide, reduced graphene, expanded graphite alkene
One or more, the individual layer rate of the graphene are more than 80%, 6-13 μm of lamella size.
Further, the specific surface area of the activated carbon is 1500-3500m2/ g, granular size are 200-300 mesh.
Further, the polymerized monomer is acrylic acid, acrylate, methyl acrylate, methyl propenoic acid glycidyl
One or both of ester, acrylamide, vinyl alcohol, organic fluorocompound combination of the above thing.
Further, the crosslinking agent is N, and N'- methylene-bisacrylamides, polyisocyanates, polyalcohols, shrink are sweet
One or more combinations in oily ether, inorganic matter, esters of acrylic acid and epoxies.
Preferably the initiator be persulfate as further, or by with bisulfites, anti-different bad hydrochlorate
One of which be reducing agent, the redox combined using the one of which in persulfate, hydrogen peroxide as oxidant
Initiation system.
As further preferably, the thermal conducting agent is MgO, Al2O3、Mg(OH)2, ZnO whiskers, silicon carbide whisker, nitridation
One of which or two or more combinations in al whisker.
As further preferably, the lubricant is E waxes, OP waxes, the one of which in PE waxes or two or more combinations.
As it is further preferably, the toughener be one of which in POE-g-GMA, EMA-g-GMA or two kinds with
Upper combination.
As further preferably, the glass fibre is alkali-free glass fibre；The synergistic flame retardant selects sodium antimonate.
As further preferably, the fire retardant is in TDE, brominated Polystyrene, deca-BDE
One of which or two kinds.
Preferably processing aid is coupling agent as further, and the coupling agent is that aluminate coupling agent, titanate esters are coupled
One or both of agent, silane coupler combination of the above.
On the basis of above-mentioned technical proposal, the present invention further provides described heat conductive flame-retarding PET/PBT composites
Application technology scheme to be a kind of using lamp holder made from heat conductive flame-retarding PET/PBT composites as described above.
On the basis of above-mentioned technical proposal, the present invention further provides described heat conductive flame-retarding PET/PBT composites
Preparation method, including following process and step：
Process one：The process for preparing activated carbon intercalated graphite alkene
Step 1：Acidizing pretreatment is carried out to activated carbon using dust technology.
Step 2：Add and dispersant and stir in a solvent, then add graphene, using ultrasonic disperse 2-24h,
Obtain graphene suspension.
Step 3：Activated carbon is added in the graphene suspension of step 2, continues ultrasonic disperse 30min-3h, is suspended
Mixed liquor, the suspension mixed solution is filtered by washing, centrifugation, obtains activated carbon intercalated graphite alkene precast body.
Step 4：Activated carbon intercalated graphite alkene precast body in step 3 is heat-treated by microwave, activated carbon is obtained and inserts
Layer graphene powder.
Process two：The process for preparing core-shell type activated carbon intercalated graphite alkene
Step 5：Use deionized water to be configured to solution of the concentration for 20%-80% polymerized monomer, add dispersant simultaneously
Stir 5-30min.The dispersant is lauryl sodium sulfate, dioctyl succinate disulfonate acid, dodecyl sodium sulfate, 12
One or more in sodium alkyl benzene sulfonate, NaTDC, sodium taurocholate.
Step 6：Activated carbon intercalated graphite alkene powder made from step 4 is subjected to surface coupling processing, is then added to step
In rapid 5 solution, using ultrasonic disperse 10-240min, activated carbon intercalated graphite alkene suspension is obtained.
Step 7：The activated carbon intercalated graphite alkene suspension of step 6 is warming up to 40-90 DEG C, then adds crosslinking agent, and
Stir, then add initiator and trigger polymerization, obtain core-shell type activated carbon intercalated graphite alkene precast body.
Step 8：The core-shell type activated carbon intercalated graphite alkene precast body of step 7 is passed through into granulation or disintegrating process and drying
Processing, obtain particle or powdered core-shell type activated carbon intercalated graphite alkene.
Process three：The process for preparing composite, obtain heat conductive flame-retarding PET/PBT composites.
Wherein, the process for preparing composite of the process three, comprises the following steps：
Step 1：Dispensing, each component needed for composite is accurately prepared, and by PET, PBT at a temperature of 105-140 DEG C
1-4h is dried, it is standby.
Step 2：Glass fibre, thermal conducting agent, fire retardant, fire retarding synergist are added in high-speed mixer, then added
Coupling agent carries out surface coupling processing, and compound is obtained after well mixed.
Step 3：Core-shell type activated carbon intercalated graphite alkene is continuously added in the compound of step 2, PET, PBT are added to height
In fast mixer, lubricant, toughener are then added, and be well mixed.
Step 4：The compound obtained in step 3 is added to progress melt blending extrusion in double screw extruder, plasticizing
Extrusion temperature is 230-290 DEG C, screw speed 120-550rpm, and obtains composite through supercooling, pelletizing and after drying.
What the present invention realized has the beneficial effect that：
1) core-shell type activated carbon intercalated graphite alkene of the invention has excellent heat conduction and fire resistance, while respectively to resistance
Combustion agent, synergistic flame retardant, thermal conducting agent have synergistic function, and assigning composite has excellent heat conduction and fire resistance.
2) core-shell type activated carbon intercalated graphite alkene of the invention has reinforcement effect to polymeric matrix, makes up because addition hinders
The deficiency of polymeric matrix performance caused by combustion agent, thermal conducting agent, such as performances such as tensile strength, bending strength, impact strengths
Decline, improve the combination property of composite.
3) core-shell type activated carbon intercalated graphite alkene of the invention has preferably dispersiveness, compared with prior art, can be big
Amplitude improves dispersive property of the graphene in polymeric matrix or polymerized monomer, solves current graphene and adds used in polymer
Existing scattered uneven technical problem during work.
4) core-shell type activated carbon intercalated graphite alkene of the invention, which is used in electrical product, has excellent electric insulation protectiveness
Can, solve graphene and used as excellent conductive body in electrical product and the safety related technical problems of conductive hidden danger be present.
Embodiment
To be further understood to the present invention, now the english abbreviation component being related in the present invention is explained as follows：
Term " EMA-g-GMA "：Ethylene-methyl acrylate copolymer graft glycidyl methacrylate.
Term " POE-g-GMA "：Glycidyl methacrylate graft ethylene-octene copolymer.
Term " E waxes " and " OP waxes "：Belong to hard component saponification and cover denier ester type waxes, during plastics processing
Lubricant, have inside and outside lubrication concurrently, the molding process for the PVC that is particularly suitable for use in, improve extrusion molding speed, improve finished product
Smoothness and glossiness, improve outward appearance, but can also be used as rubber processing aids.
Term " PE waxes "：Refer to ultra-low molecular weight northylen, be used primarily in the mobility for improving polyolefin plastics, raising is filled out
Material, the dispersant of auxiliary agent.
Heat conductive flame-retarding PET/PBT composites of the present invention, including following component and parts by weight：PET 30%-
40%；PBT 5%-10%；Core-shell type activated carbon intercalated graphite alkene 0.5%-2%；Glass fibre 15%-30%；Thermal conducting agent
15%-30%；Lubricant 0.3%-0.8%；Toughener 3%-5%；Synergistic flame retardant 2%-3%；Fire retardant 7%-10%；Add
Work auxiliary agent 0.3%-1%.
For the core-shell type activated carbon intercalated graphite alkene using activated carbon intercalated graphite alkene as stratum nucleare, cladding connects the stratum nucleare
Cross-linked structure condensate is shell, the component and mass fraction that each structure sheaf includes in the core-shell type activated carbon intercalated graphite alkene
It is as follows：
Graphene 10-50%；
Activated carbon 10-45%；
Cross-linked structure condensate 5-47%.
Wherein, the cross-linked structure condensate is triggered to polymerize and be crosslinked by polymerized monomer, initiator and crosslinking agent and formed
The condensate with three-dimensional crosslinked network structure；The dosage of the polymerized monomer to those skilled in the art,
By quality shared by cross-linked structure condensate, and comprehensive polymerized monomer, crosslinking agent and its dosage, cross-linking reaction mechanism and aqueous
The indexs such as rate are calculated and obtained, and by mass percentage, the dosage of the initiator is the 0.01-2% of polymerized monomer；The crosslinking
The dosage of agent is the 0.05-5% of polymerized monomer.
As further preferred embodiment, the graphene is graphene oxide, reduced graphene, expanded graphite alkene
In one or more, the individual layer rate of the graphene is more than 80%, 6-13 μm of lamella size.It is specific still more preferably
In embodiment, the graphene is preferably graphene oxide or expanded graphite alkene, wherein, surface of graphene oxide contains abundant
Oxygen-containing functional group, easily reunite by means of " π-π " effect and Van der Waals force, graphene oxide and be not easy to disperse, it is and active
Charcoal (AC) nanoparticle structure has unique functional group, such as carboxyl, carbonyl, phenol, lactone, quinone, therefore, by activated carbon in itself
Intercalation graphene oxide, not only serves good skeletal support effect between graphene oxide layer, and by activated carbon
Material is scattered in surface of graphene oxide by interfacial interaction, and absorbent charcoal material effectively increases the layer of graphene oxide
Between distance, reduce the stack effect of graphene oxide layer, using the synergy between absorbent charcoal material and graphene, make
Obtaining graphene oxide and absorbent charcoal material can fully play a role.The oxygen content selectable range of graphene oxide is 42-
55%.Wherein, the specific surface area of the activated carbon is 1500-3500m2/ g, granular size are 200-300 mesh；Graphene is tool
There is single-layer graphene film to be stacked and form in the form of sheets, its thickness is preferably in below 50nm, and graphene is in the horizontal direction
On size preferably below 10 microns, graphene can be milled through ball mill, sieving handles to obtain satisfactory graphene.
As further preferred embodiment, the polymerized monomer is acrylic acid, acrylate, methyl acrylate, first
One or both of base glycidyl acrylate, acrylamide, vinyl alcohol, organic fluorocompound combination of the above thing, as more
Further preferred, the polymerized monomer is preferably acrylate or/and GMA.
As further preferred embodiment, the crosslinking agent is N, N'- methylene-bisacrylamides, polyisocyanic acid
One or more combinations in ester, polyalcohols, glycidol ether, inorganic matter, esters of acrylic acid and epoxies.Wherein, contract
Water glycerine ether crosslinking agent such as polyethyleneglycol diglycidylether；Acrylic ester cross-linking agent such as polyethylene glycol 200 diacrylate,
One or both of Pehanorm triacrylate；Inorganic matter such as zinc oxide；Epoxies such as XR-500.As more entering one
Step it is preferred, the crosslinking agent is preferably N, N'- methylene-bisacrylamides, polyalcohols, wherein, the polyalcohols are as poly-
Ethylene glycol 200, butanediol, pentaerythrite, one or more therein may be selected and be applied in combination.
The initiator is persulfate, or by using bisulfites, the anti-different bad one of which learned in hydrochlorate as reduction
Agent, the redox initiation system combined using the one of which in persulfate, hydrogen peroxide as oxidant.
In preferred embodiment, the thermal conducting agent is MgO, Al2O3、Mg(OH)2, ZnO whiskers, silicon carbide whisker
Palpus, the one of which in aluminium nitride whisker or two or more combinations.It is preferred that MgO, Al2O3、Mg(OH)2Composition be described
Thermal conducting agent.
In preferred embodiment, the lubricant be E waxes, OP waxes, the one of which in PE waxes or two kinds with
Upper combination.The toughener is POE-g-GMA or/and EMA-g-GMA.
In preferred embodiment, the glass fibre is alkali-free glass fibre；The synergistic flame retardant selection
Sodium antimonate.The fire retardant is TDE, brominated Polystyrene, the one of which in deca-BDE or two kinds.
Preferably processing aid is coupling agent as further, and the coupling agent is that aluminate coupling agent, titanate esters are coupled
One or both of agent, silane coupler combination of the above.
On the basis of above-mentioned technical proposal, the present invention further provides use heat conductive flame-retarding PET/PBT as described above
Lamp holder made from composite.
Embodiment 1
The present embodiment provides the preparation method for leading core-shell type activated carbon intercalated graphite alkene, including following process and step：
Process one：The process for preparing activated carbon intercalated graphite alkene
Step 1：Acidizing pretreatment is carried out to activated carbon using dust technology.
Step 2：Add and dispersant and stir in a solvent, then add graphene, using ultrasonic disperse 2-24h,
Obtain graphene suspension.In this step, solvent selection deionized water or ethanol.
Step 3：The activated carbon of 200-300 mesh is added in the graphene suspension of step 2, continues ultrasonic disperse 30min-
3h, suspension mixed solution is obtained, the suspension mixed solution is filtered by washing, centrifugation, obtains activated carbon intercalated graphite alkene precast body.
Step 4：Activated carbon intercalated graphite alkene precast body in step 3 is heat-treated by microwave, activated carbon is obtained and inserts
Layer graphene powder.
Process two：The process for preparing core-shell type activated carbon intercalated graphite alkene
Step 5：Deionized water is used to be configured to solution of the concentration for 20%-80% polymerized monomer, such as concentration 30%,
50%, add dispersant and stir 5-30min.
Step 6：Activated carbon intercalated graphite alkene powder made from step 4 is subjected to surface coupling processing, is then added to step
In rapid 5 solution, using ultrasonic disperse 10-240min, activated carbon intercalated graphite alkene suspension is obtained.
Step 7：The activated carbon intercalated graphite alkene suspension of step 6 is warming up to 40-90 DEG C, then adds crosslinking agent, and
Stir, then add initiator and trigger polymerization, obtain core-shell type activated carbon intercalated graphite alkene precast body.
Step 8：By the core-shell type activated carbon intercalated graphite alkene precast body of step 7 by granulation or disintegrating process after, place
Processing is dried in 110-160 DEG C of baking oven, obtains particle or powdered core-shell type activated carbon intercalated graphite alkene.
Embodiment 2
The present embodiment further provides for the preparation method of heat conductive flame-retarding PET/PBT composites on the basis of embodiment 1,
Including following process and step：
Step 1：Dispensing, each component needed for composite is accurately prepared, and by PET, PBT at a temperature of 105-140 DEG C
1-4h is dried, it is standby.
Step 2：Thermal conducting agent, fire retardant, fire retarding synergist are added in high-speed mixer, coupling agent is then added and carries out
Surface coupling processing, compound is obtained after well mixed.This step, the coupling agent are aluminate coupling agent, titanate esters coupling
One kind in agent, silane coupler, or two or more coupling agents are combined use.
Step 3：Core-shell type activated carbon intercalated graphite alkene is continuously added in the compound of step 2, PET, PBT are added to height
In fast mixer, lubricant, toughener are then added, and be well mixed.
Step 4：The compound obtained in step 3 is added to progress melt blending extrusion in double screw extruder, squeezed
Going out machine adds fine mouth to add glass fibre, controls glass fiber content 15%-30%, and plasticizing extrusion temperature is 230-290 DEG C, screw speed
120-550rpm, and obtain composite through supercooling, pelletizing and after drying.
Wherein, the dispersant in step 2 and step 5, select lauryl sodium sulfate, dioctyl succinate disulfonate acid,
One or more in dodecyl sodium sulfate, neopelex, NaTDC, sodium taurocholate.
Embodiment 3
In order to further improve PET/PBT mechanical property, heat resistance and improve processing characteristics, in PET/PBT systems
Middle addition fire retardant, lubricant etc., obtain the polymer-modified of multi-functional, high-performance and high practicability.
The heat conductive flame-retarding PET/PBT composites of the present embodiment, including following component and parts by weight：PET is 30%；PBT
For 10%；Core-shell type activated carbon intercalated graphite alkene is 0.5%；Alkali-free glass fibre is 23.9%；MgO is 23%；E waxes are
0.3%；POE-g-GMA is 3%；Sodium antimonate is 2%；TDE is 7%；Aluminate coupling agent is 0.3%.Wherein：
For the core-shell type activated carbon intercalated graphite alkene using activated carbon intercalated graphite alkene as stratum nucleare, cladding connects the stratum nucleare
Cross-linked structure condensate is shell, the component and mass parts that each structure sheaf includes in the core-shell type activated carbon intercalated graphite alkene
Number is as follows：Graphene oxide 10%；Activated carbon 45%, specific surface area 15002/ g, granular size are 200 mesh；Cross-linked structure is gathered
Zoarium 45%.
Wherein, the cross-linked structure condensate triggers polymerization by acrylate, potassium peroxydisulfate, and by N, N'- di-2-ethylhexylphosphine oxides
The condensate with three-dimensional crosslinked network structure that acrylamide crosspolymer forms.Count in parts by weight, in the propylene containing 43 parts
0.43 part of potassium peroxydisulfate is added in the monomer solution of acid esters；Add N, N'- methylene-bisacrylamide amounts be 0.86 part.
By the formula system of the present embodiment according to embodiment 1 and the preparation method of embodiment 2, heat conductive flame-retarding PET/ is made
PBT composite.
Embodiment 4
The heat conductive flame-retarding PET/PBT composites of the present embodiment, including following component and parts by weight：PET is 40%；PBT
For 5%；Core-shell type activated carbon intercalated graphite alkene is 2%；Alkali-free glass fibre is 16%；MgO、Al2O3In proportion 1:1 configuration
Composition is 17.2%；E waxes, PE waxes in proportion 1:The composition of 1 configuration is 0.8%；EMA-g-GMA is 5%；Sodium antimonate is
3%；TDE, brominated Polystyrene in proportion 1:The composition of 1 configuration is 10%；Titanate coupling agent is 1%.Its
In：
For the core-shell type activated carbon intercalated graphite alkene using activated carbon intercalated graphite alkene as stratum nucleare, cladding connects the stratum nucleare
Cross-linked structure condensate is shell, the component and mass parts that each structure sheaf includes in the core-shell type activated carbon intercalated graphite alkene
Number is as follows：Expanded graphite alkene 50%；Activated carbon 10%, specific surface area 2000m2/ g, granular size are 250 mesh；Cross-linked structure
Condensate 45%.
The cross-linked structure condensate triggers polymerization by GMA, potassium peroxydisulfate, and using poly-
Ethylene glycol 200 presses 1 with butanediol：What the combination crosslinking agent and crosslinking that 1 configuration forms formed has three-dimensional crosslinked network structure
Condensate.By mass percentage, the dosage of the potassium peroxydisulfate is the 2% of GMA；The combination
The dosage of crosslinking agent is the 5% of GMA.
By the formula system of the present embodiment according to embodiment 1 and the preparation method of embodiment 2, heat conductive flame-retarding PET/ is made
PBT composite.
Embodiment 5
The heat conductive flame-retarding PET/PBT composites of the present embodiment, including following component and parts by weight：PET is 35%；PBT
For 7%；Core-shell type activated carbon intercalated graphite alkene is 1.5%；Alkali-free glass fibre is 20.5%；MgO、Al2O3、Mg(OH)2By than
Example 1:1:The composition of 1 configuration is 20%；E waxes, OP waxes, PE waxes in proportion 1:1:The composition of 1 configuration is 0.5%；POE-g-
GMA, EMA-g-GMA in proportion 1:The composition of 1.5 configurations is 4%；Sodium antimonate is 2.5%；TDE, brominated polyphenylene
Ethene, deca-BDE in proportion 0.5:1:The composition of 0.5 configuration is 8.5%；Titanate coupling agent, silane coupler press than
Example 1:The composition of 1.2 configurations is 0.5%.
For the core-shell type activated carbon intercalated graphite alkene using activated carbon intercalated graphite alkene as stratum nucleare, cladding connects the stratum nucleare
Cross-linked structure condensate is shell, the component and mass parts that each structure sheaf includes in the core-shell type activated carbon intercalated graphite alkene
Number is as follows：Graphene oxide, expanded graphite alkene in proportion 1:The graphene composition 35% of 0.4 configuration；Activated carbon 30%, compare table
Area is 3500m2/ g, granular size are 300 mesh；Cross-linked structure condensate 35%.
Wherein, the cross-linked structure condensate presses 1 by acrylate and GMA:0.5 configuration
Monomer composition, potassium peroxydisulfate trigger with the redox system that hydrogen peroxide forms to be polymerize, and using butanediol, Ji Wusi
Alcohol presses 1：The condensate with three-dimensional crosslinked network structure that the crosslinker composition crosslinking that 1 configuration forms forms, by quality hundred
Divide than meter, the dosage of the initiator is the 0.01% of monomer composition；The dosage of the crosslinking agent is monomer composition
0.05%.
By the formula system of the present embodiment according to embodiment 1 and the preparation method of embodiment 2, heat conductive flame-retarding PET/ is made
PBT composite.
Embodiment 6
The present embodiment carries out performance detection to the heat conductive flame-retarding PET/PBT composites of embodiment 3- embodiments 5.
Test specimen：The heat conductive flame-retarding PET/PBT composites of embodiment 3- embodiments 5.
Comparative sample：Core-shell type activated carbon intercalated graphite alkene is not added in embodiment 3- embodiments 5, wherein core-shell type is lived
Property the amount added in embodiment 3- embodiments 5 of charcoal intercalated graphite alkene supplemented by PET, PBT, i.e., by PET, PBT in the implementation
The incrementss that adding proportion in example accordingly converts in PET, PBT, other additive component accountings and addition are constant.
Method of testing：
(1) heat conductivility method of testing：Tested according to ASTM C177 standards.
(2) fire resistance method of testing：Press《UL94 plastic flame performance testing standards》Surveyed with GB/T2408 standards
Examination.
(3) resistive performance method of testing：ASTM D 25793
(4) mechanic property test method：Tensile strength and elongation at break are tested by ISO 527-1 standards, bending
Intensity presses the standard testings of ISO 178, and notch impact strength is tested by ISO 179-1 standards.
Testing result is as follows：
Embodiment 6
The present embodiment provides lamp made from a kind of heat conductive flame-retarding PET/PBT composites using embodiment 3- embodiments 5
Pedestal.The lamp holder uses the heat conductive flame-retarding PET/PBT composites of embodiment 3, embodiment 4 or embodiment 5, according to existing skill
The injection molding technique that lamp holder is prepared in art obtains the lamp holder of the present embodiment.
Although the present invention describes specific case study on implementation, the scope of the present invention is not limited to above-mentioned specific real
Example is applied, without departing from the case in the spirit of the invention, various modifications, variations and alternatives to the present invention each fall within the guarantor of the present invention
Protect scope.
Claims (10)
- A kind of 1. heat conductive flame-retarding PET/PBT composites, it is characterised in that：The composite includes following component and weight Part：PET 30%-40%；PBT 5%-10%；Core-shell type activated carbon intercalated graphite alkene 0.5%-2%；Glass fibre 15%-30%；Thermal conducting agent 15%-30%；Lubricant 0.3%-0.8%；Toughener 3%-5%；Synergistic flame retardant 2%-3%；Fire retardant 7%-10%；Processing aid 0.3%-1%.
- 2. heat conductive flame-retarding PET/PBT composites according to claim 1, it is characterised in that：The core-shell type activated carbon Intercalated graphite alkene is using activated carbon intercalated graphite alkene as stratum nucleare, and cross-linked structure condensate that cladding connects the stratum nucleare is shell, institute State core-shell type activated carbon intercalated graphite alkene by mass percentage, the component and mass fraction that each structure sheaf includes are as follows：Graphene 10-50%；Activated carbon 10-45%；Cross-linked structure condensate 5-47%；Wherein, the cross-linked structure condensate triggers polymerization by polymerized monomer, initiator, and crosslinked dose is crosslinked the tool formed There is the condensate of three-dimensional crosslinked network structure, by mass percentage, the dosage of the initiator is the 0.01- of polymerized monomer 2%；The dosage of the crosslinking agent is the 0.05-5% of polymerized monomer.
- 3. heat conductive flame-retarding PET/PBT composites according to claim 2, it is characterised in that：The graphene is oxidation One or more in graphene, reduced graphene, expanded graphite alkene, the individual layer rate of the graphene are more than 80%, and lamella is big It is small 6-13 μm.
- 4. heat conductive flame-retarding PET/PBT composites according to claim 2, it is characterised in that：The ratio table of the activated carbon Area is 1500-3500m2/ g, granular size are 200-300 mesh.
- 5. heat conductive flame-retarding PET/PBT composites according to claim 2, it is characterised in that：The polymerized monomer is acrylic acid, acrylate, methyl acrylate, GMA, acrylamide, second One or both of enol, organic fluorocompound combination of the above thing；The crosslinking agent is N, N'- methylene-bisacrylamides, polyisocyanates, polyalcohols, glycidol ether, inorganic matter, One or more combinations in esters of acrylic acid and epoxies；The initiator is persulfate, or by learning the one of which in hydrochlorate using bisulfites, anti-different evil idea as reducing agent, with One of which in persulfate, hydrogen peroxide is the redox initiation system that oxidant combines.
- 6. heat conductive flame-retarding PET/PBT composites according to claim 1 or 2, it is characterised in that：The thermal conducting agent is MgO, Al2O3、Mg(OH)2, ZnO whiskers, silicon carbide whisker, the one of which in aluminium nitride whisker or Two or more combinations.
- 7. heat conductive flame-retarding PET/PBT composites according to claim 1 or 2, it is characterised in that：The toughener is One of which or two or more combinations in POE-g-GMA, EMA-g-GMA.
- 8. heat conductive flame-retarding PET/PBT composites according to claim 1 or 2, it is characterised in that：The lubricant is E Wax, OP waxes, the one of which in PE waxes or two or more combinations.
- 9. heat conductive flame-retarding PET/PBT composites according to claim 1 or 2, it is characterised in that：The glass fibre is Alkali-free glass fibre；The synergistic flame retardant selects sodium antimonate；The fire retardant be TDE, brominated Polystyrene, One of which in deca-BDE or two kinds.
- A kind of 10. lamp holder, it is characterised in that：The lamp holder is using the heat conductive flame-retarding as described in claim 1-13 is any PET/PBT composites are made.
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