CN108568215A - High heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane and preparation method thereof - Google Patents
High heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane and preparation method thereof Download PDFInfo
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- CN108568215A CN108568215A CN201810344329.8A CN201810344329A CN108568215A CN 108568215 A CN108568215 A CN 108568215A CN 201810344329 A CN201810344329 A CN 201810344329A CN 108568215 A CN108568215 A CN 108568215A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0011—Casting solutions therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0013—Casting processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0083—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0095—Drying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
- B01D69/085—Details relating to the spinneret
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
- B01D69/087—Details relating to the spinning process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/26—Polyalkenes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/12—Specific ratios of components used
Abstract
The invention discloses a kind of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane and preparation methods, in parts by mass, including 15 ~ 35 parts of polypropylene, 1 ~ 8 part of multi-walled carbon nanotube, 70 80 parts of esters mixed solvents and 0.1 ~ 0.5 part of antioxidant.The thermal coefficient of the hollow-fibre membrane of the present invention is high, and performance is stablized, and porosity is high, and production prepare it is simple and practicable, it is of low cost.
Description
Technical field
The present invention relates to technical field of polymer materials, especially a kind of high heat conduction polypropylene/multi-walled carbon nanotube is hollow
Fiber film material and preparation method thereof.
Background technology
From 18th century mid-term, since Abbe Noletl are found that UF membrane phenomenon for the first time.With the cognitive ability of people
And multi-disciplinary continuous development so that membrane separation technique has obtained more and more people's favors.Membrane separation technique is with high score
Subfunction film is representative, and is had in the high new technique of the emerging multi-crossed disciplines to grow up in recent decades
Easy to operate, the advantages that equipment is simple, environmentally protective and be widely used in petrochemical industry, electron electric power, food processing, dirt
The fields such as water process, sea water desalination, biological medicine.Wherein polypropylene hollow fiber membrane is because good, resistance to shock resistance, wear-resisting property
The advantages that burn into per membrane area is big, separative efficiency is high and be widely used in water process, membrane distillation, gas separation and biology
Medicine and other fields.But polypropylene hollow fiber membrane mainly or as separation material material is used for separation field, other field
Using having not been reported.Simultaneously polypropylene hollow fiber membrane is also a kind of porous material of high porosity, therefore is contemplated that
It is used as porous material.
As energy consumption pressure is increasing, energy-saving and emission-reduction, the environmentally protective theme as 21 century.In numerous rings
Phase-change accumulation energy is that (solid-liquid, solid-solid and solid-liquid gas) is absorbed or released when being changed using phase-change material itself states of matter in guarantor's technology
A large amount of latent heat and carry out, have larger development prospect.Solar energy storage, building heat preservation, electric power " peak load shifting ",
The fields such as industrial exhaust heat and Waste Heat Recovery and aerospace have broad application prospects.
Phase-changing energy storage material is one kind can adjust itself phase transformation to absorb heat in environment by ambient temperature
Or the new function material for releasing itself storage heat, there is energy storage density is big, temperature is constant and process is easy to control etc.
Advantage.Wherein paraffin has lot of advantages as a kind of phase-changing energy storage material, and convenient material drawing is cheap, nontoxic, hardly deposits
In corrosivity, spontaneous nucleation is subcooled crystalline polamer unobvious, and steam forces down when fusing, while chemism is relatively low, and chemical property is steady
It is fixed, it is not easy to chemically react, be in neutrality, be difficult charing of decomposing when temperature is less than 140 DEG C, there is certain intensity
And plasticity.But there are also significant drawback, such as thermal coefficient are low for it.For its defect in the application, in recent years
In terms of research is concentrated mainly on the encapsulation for improving paraffin and heat conductivility, to reach expansion application purpose.
Polypropylene hollow fiber membrane is also a kind of porous material of high porosity, therefore is contemplated that and is encapsulated for paraffin.But
Polypropylene hollow fiber membrane is the polymer film prepared as raw material using polypropylene, and thermal conductivity is still very low.Therefore it prepares a kind of high
The polypropylene hollow fiber membrane of heat conduction is also the application development demand met instantly.
Invention content
It is an object of the present invention to provide a kind of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane and its preparation sides
Method.The thermal coefficient of the hollow-fibre membrane of the present invention is high, and performance is stablized, and porosity is high, and production prepare it is simple and practicable, it is at low cost
It is honest and clean.
The invention is realized in this way：A kind of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, by mass parts
Meter, including 15~35 parts of polypropylene, 1~8 part of multi-walled carbon nanotube, 70-80 parts of esters mixed solvents and 0.1~0.5 part of antioxygen
Agent.
High heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned, the polypropylene are homopolypropylene；Or
High fondant-strength homopolypropylene containing branch, melt index are 0.5~4g/10min.
High heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned, the esters mixed solvent include that polarity is low
Esters diluent and high non-diluted dose of the esters of polarity, the low esters diluent of polarity and non-diluted dose high of esters of polarity
Mass ratio is 10:2~7.
High heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned, the low esters diluent of the polarity are
Sebacic acid dioctyl ester or 1,2- cyclohexane cyclohexanedimethanodibasic dinonyls；Non-diluted dose of the high esters of polarity are glyceryl triacetate or second
Acyl tributyl citrate.
High heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned, the multi-walled carbon nanotube position technical grade
Multi-walled carbon nanotube, length is between 3 μm~20 μm.
High heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned, the antioxidant are antioxidant 1010, resist
The arbitrary combination of one or more of oxygen agent 168, antioxidant B215 or antioxidant B225.
A kind of preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned, includes the following steps：
1) casting solution is prepared：The high esters of the low esters diluent of multi-walled carbon nanotube, polypropylene, polarity, polarity are non-
Diluent mixed solvent and antioxidant are added in reaction kettle, and 2~6h is stirred under conditions of 150 DEG C~200 DEG C, 80~160rpm
At homogeneous solution；Afterwards at 5~20rpm 1~4h of stirring vacuum deaeration at uniform casting solution；
2) hollow-fibre membrane spins：Casting solution is delivered to spinneret through double screw extruder, extrusion temperature is 150 DEG C~
200 DEG C, spinneret temperature is 170 DEG C~200 DEG C；Core liquid kettle inner core liquid is used as by core liquid pump quantitative feeding to spinneret simultaneously
Coelosis fluid, control core liquid temperature is 50 DEG C~130 DEG C, carries out spinning doughnut；Doughnut passes through the gas of 0~10cm long
Tunica fibrosa is wound with up- coiler into cooling split-phase curing molding is carried out in 0~30 DEG C of coagulating bath, then takes silk afterwards by gap；
3) hollow-fibre membrane post-processes：The hollow fiber film thread of taking-up is heat-treated in 90-110 DEG C of constant temperature oven
20-40min eliminates film wire thermal stress, is then extracted with soaked in absolute ethyl alcohol, extraction time 20-28 hours, the film wire after extraction
90~110 DEG C of dry 0.5~1h of thermal finalization are to get polypropylene/multi-walled carbon nanotube hollow-fibre membrane in vacuum drying oven.
The preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned, the polypropylene/multi wall
The outer diameter of Carbon-nanotube hollow fiber membrane is 1-3mm, porosity 50%-80%.
The preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned,：The core liquid is certain herbaceous plants with big flowers two
Dioctyl phthalate or 1,2- cyclohexane cyclohexanedimethanodibasic dinonyls.
The preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane above-mentioned, the coagulating bath are water
Bath, the bath of sebacic acid dioctyl ester or the bath of 1,2- cyclohexane cyclohexanedimethanodibasic dinonyls.
Compared with prior art, the present invention has the following advantages：
(1) high heat conduction：Multi-walled carbon nanotube in high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane plays enhancing
The effect of heat conduction can effectively improve the thermal conductivity of polypropylene/multi-walled carbon nanotube Hollow-fibre membranes material；
(2) high intensity：Since the mechanical strength of multi-walled carbon nanotube is larger, after addition can to polypropylene hollow fiber membrane its
To the effect of enhancing；
(3) corrosion-resistant and cheap, it is easy to industrialized production.
Description of the drawings
Fig. 1 is that high heat conduction polypropylene/multi-walled carbon nanotube Hollow-fibre membranes material amplifies 100 times of cross-section diagrams；
Fig. 2 is that high heat conduction polypropylene/multi-walled carbon nanotube Hollow-fibre membranes material amplifies 5000 cross-section diagrams.
Specific implementation mode
With reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
Embodiment 1：A kind of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, in parts by mass, including 15 parts poly-
Propylene, 1 part of multi-walled carbon nanotube, 70 parts of esters mixed solvents and 0.1 part of antioxidant；
The polypropylene is homopolypropylene；
The esters mixed solvent is by sebacic acid dioctyl ester and glyceryl triacetate in mass ratio 10:2 compositions；
The multi-walled carbon nanotube is technical grade multi-walled carbon nanotube, and length is at 3 μm；
The antioxidant is antioxidant 1010.
Embodiment 2：A kind of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, in parts by mass, including 22 parts poly-
Propylene, 3 parts of multi-walled carbon nanotubes, 72 parts of esters mixed solvents and 0.2 part of antioxidant；
The polypropylene is the high fondant-strength homopolypropylene containing branch, melt index 0.5g/10min；
The esters mixed solvent is by 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl and glyceryl triacetate in mass ratio 10:4
Composition；
The multi-walled carbon nanotube is technical grade multi-walled carbon nanotube, and length is at 8 μm；
The antioxidant is antioxidant B215.
Embodiment 3：A kind of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, in parts by mass, including 35 parts poly-
Propylene, 8 parts of multi-walled carbon nanotubes, 80 parts of esters mixed solvents and 0.5 part of antioxidant；
The polypropylene is the high fondant-strength homopolypropylene containing branch, melt index 4g/10min；
The esters mixed solvent by 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl and tributyl 2-acetylcitrate in mass ratio
10:7 compositions；
The multi-walled carbon nanotube is technical grade multi-walled carbon nanotube, and length is at 20 μm；
The antioxidant is irgasfos 168 and antioxidant B225 in mass ratio 1:2 compositions.
Embodiment 4：A kind of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, in parts by mass, including 32 parts poly-
Propylene, 6 parts of multi-walled carbon nanotubes, 76 parts of esters mixed solvents and 0.4 part of antioxidant；
The polypropylene is the high fondant-strength homopolypropylene containing branch, melt index 2g/10min；
The esters mixed solvent by 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl and tributyl 2-acetylcitrate in mass ratio
10:6 compositions；
The multi-walled carbon nanotube is technical grade multi-walled carbon nanotube, and length is at 16 μm；
The antioxidant is irgasfos 168 and antioxidant B215 in mass ratio 1:1 composition.
Embodiment 5：A kind of preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, steps are as follows：
1) casting solution is prepared：By multi-walled carbon nanotube, polypropylene, 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl and acetyl lemon
Sour tributyl mixed solvent and antioxidant are added in reaction kettle, and 4h is stirred under conditions of 180 DEG C, 100rpm into homogeneous solution；
Afterwards again under 10rpm stirring vacuum deaeration 2h at uniform casting solution；
2) hollow-fibre membrane spins：Casting solution is delivered to spinneret through double screw extruder, extrusion temperature is 170 DEG C,
Spinneret temperature is 170 DEG C, while 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl gives spray by core liquid pump quantitative feeding in core liquid kettle
Filament plate is 70 DEG C DEG C as coelosis fluid, temperature, carries out spinning doughnut, and doughnut enters 18 by the air gap of 2cm long
DEG C coagulating bath in carry out cooling split-phase curing molding.Tunica fibrosa is wound with up- coiler, after take silk；
3) hollow-fibre membrane post-processes：The hollow fiber film thread of taking-up is heat-treated in 100 DEG C of constant temperature ovens
30min eliminates film wire thermal stress, and the diluent in doughnut is extracted with soaked in absolute ethyl alcohol, extraction time 24 hours, extraction
Film wire afterwards in vacuum drying oven to get polypropylene/multi-walled carbon nanotube hollow-fibre membrane, lead 90 DEG C of dry thermal finalization 0.5h by film
Heating rate, porosity and mechanical strength are shown in Table 1.
Embodiment 6：A kind of preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, steps are as follows：
1) casting solution is prepared：By multi-walled carbon nanotube, polypropylene, 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl and acetyl lemon
Sour tributyl mixed solvent and antioxidant are added in reaction kettle, and 4h is stirred under conditions of 180 DEG C, 100rpm into homogeneous solution；
Afterwards again under 10rpm stirring vacuum deaeration 2h at uniform casting solution；
2) hollow-fibre membrane spins：Casting solution is delivered to spinneret through double screw extruder, extrusion temperature is 170 DEG C,
Spinneret temperature is 170 DEG C, while 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl gives spray by core liquid pump quantitative feeding in core liquid kettle
Filament plate is 70 DEG C DEG C as coelosis fluid, temperature, carries out spinning doughnut, and doughnut enters 18 by the air gap of 2cm long
DEG C coagulating bath in carry out cooling split-phase curing molding.Tunica fibrosa is wound with up- coiler, after take silk；
3) hollow-fibre membrane post-processes：The hollow fiber film thread of taking-up is heat-treated in 100 DEG C of constant temperature ovens
30min eliminates film wire thermal stress.Diluent in doughnut is extracted with soaked in absolute ethyl alcohol, extraction time 24 hours.Extraction
Film wire afterwards in vacuum drying oven to get polypropylene/multi-walled carbon nanotube hollow-fibre membrane, lead 90 DEG C of dry thermal finalization 0.5h by film
Heating rate, porosity and mechanical strength are shown in Table 1.
Embodiment 7：A kind of preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, steps are as follows：
1) casting solution is prepared：By multi-walled carbon nanotube, polypropylene, 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl and acetyl lemon
Sour tributyl mixed solvent and antioxidant (0.1wt%) are added in reaction kettle, stirred under conditions of 180 DEG C, 100rpm 4h at
Homogeneous solution；Afterwards again under 10rpm stirring vacuum deaeration 2h at uniform casting solution；
2) hollow-fibre membrane spins：Casting solution is delivered to spinneret through double screw extruder, extrusion temperature is 170 DEG C,
Spinneret temperature is 170 DEG C, while 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl gives spray by core liquid pump quantitative feeding in core liquid kettle
Filament plate is 70 DEG C DEG C as coelosis fluid, temperature, carries out spinning doughnut.Doughnut enters 18 by the air gap of 2cm long
DEG C coagulating bath in carry out cooling split-phase curing molding, tunica fibrosa is wound with up- coiler, after take silk；
3) hollow-fibre membrane post-processes：The hollow fiber film thread of taking-up is heat-treated in 100 DEG C of constant temperature ovens
30min eliminates film wire thermal stress.Diluent in doughnut is extracted with soaked in absolute ethyl alcohol, extraction time 24 hours.Extraction
Film wire afterwards in vacuum drying oven to get polypropylene/multi-walled carbon nanotube hollow-fibre membrane, lead 90 DEG C of dry thermal finalization 0.5h by film
Heating rate, porosity and mechanical strength are shown in Table 1.
Embodiment 8：A kind of preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, steps are as follows：
1) casting solution is prepared：By multi-walled carbon nanotube, polypropylene, 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl and acetyl lemon
Sour tributyl mixed solvent and antioxidant are added in reaction kettle, and 4h is stirred under conditions of 180 DEG C, 100rpm into homogeneous solution；
Afterwards again under 10rpm stirring vacuum deaeration 2h at uniform casting solution；
2) hollow-fibre membrane spins：Casting solution is delivered to spinneret through double screw extruder, extrusion temperature is 170 DEG C,
Spinneret temperature is 170 DEG C, while 1,2- cyclohexane cyclohexanedimethanodibasics dinonyl gives spray by core liquid pump quantitative feeding in core liquid kettle
Filament plate is 70 DEG C DEG C as coelosis fluid, temperature, carries out spinning doughnut, and doughnut enters 18 by the air gap of 2cm long
DEG C coagulating bath in carry out cooling split-phase curing molding.Tunica fibrosa is wound with up- coiler, after take silk；
3) hollow-fibre membrane post-processes：The hollow fiber film thread of taking-up is heat-treated in 100 DEG C of constant temperature ovens
30min eliminates film wire thermal stress.Diluent in doughnut is extracted with soaked in absolute ethyl alcohol, extraction time 24 hours.Extraction
Film wire afterwards in vacuum drying oven to get polypropylene/multi-walled carbon nanotube hollow-fibre membrane, lead 90 DEG C of dry thermal finalization 0.5h by film
Heating rate, porosity and mechanical strength are shown in Table 1.
1 paraffin encapsulation amount of table, thermal conductivity and latent heat of phase change data
High heat conduction polypropylene/multi-walled carbon nanotube the Hollow-fibre membranes material prepared using thermally induced phase separation.It was film-made
With the increase of polypropylene multi-walled carbon nanotube addition in journey, film thermal conductivity, porosity and tensile strength are in rising trend.This
It is because enhancing conductive force had not only been played in the addition of multi-walled carbon nanotube, but also played the role of enhancing.Polypropylene solid content simultaneously
After increase, membrane porosity is reduced, but film-strength increased.In conclusion being led using height prepared by thermally induced phase separation
Hot polymerization propylene/multi-walled carbon nanotube hollow-fibre membrane is feasible method.
Claims (10)
1. a kind of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane, it is characterised in that：In parts by mass, including 15 ~ 35
Part polypropylene, 1 ~ 8 part of multi-walled carbon nanotube, 70-80 parts of esters mixed solvents and 0.1 ~ 0.5 part of antioxidant.
2. high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane according to claim 1, it is characterised in that：It is described
Polypropylene be homopolypropylene；Or the high fondant-strength homopolypropylene containing branch, melt index are 0.5 ~ 4g/
10min。
3. high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane according to claim 1, it is characterised in that：It is described
Esters mixed solvent includes the low esters diluent of polarity and high non-diluted dose of the esters of polarity, the low esters diluent of polarity and
The mass ratio of non-diluted dose of the high esters of polarity is 10:2~7.
4. high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane according to claim 3, it is characterised in that：It is described
The low esters diluent of polarity be sebacic acid dioctyl ester or 1,2- cyclohexane cyclohexanedimethanodibasic dinonyls；The high esters of polarity are non-dilute
It is glyceryl triacetate or tributyl 2-acetylcitrate to release agent.
5. high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane according to claim 1, it is characterised in that：It is described
Multi-walled carbon nanotube be technical grade multi-walled carbon nanotube, length is between 3 μm ~ 20 μm.
6. high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane according to claim 1, it is characterised in that：It is described
Antioxidant be arbitrary group of one or more of antioxidant 1010, irgasfos 168, antioxidant B215 or antioxidant B225
It closes.
7. a kind of preparation of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane as claimed in any one of claims 1 to 6
Method, it is characterised in that：Include the following steps：
Casting solution is prepared：By non-diluted dose high of esters of the low esters diluent of multi-walled carbon nanotube, polypropylene, polarity, polarity
Mixed solvent and antioxidant are added in reaction kettle, and 2 ~ 6h is stirred under conditions of 150 DEG C ~ 200 DEG C, 80 ~ 160rpm at uniformly molten
Liquid；Afterwards at 5 ~ 20rpm 1 ~ 4h of stirring vacuum deaeration at uniform casting solution；
Hollow-fibre membrane spins：Casting solution is delivered to spinneret through double screw extruder, extrusion temperature is 150 DEG C ~ 200 DEG C,
Spinneret temperature is 170 DEG C ~ 200 DEG C；Core liquid kettle inner core liquid is used as coelosis stream by core liquid pump quantitative feeding to spinneret simultaneously
Body, control core liquid temperature is 50 DEG C ~ 130 DEG C, carries out spinning doughnut；Doughnut by the air gap of 0 ~ 10cm long into 0 ~
Cooling split-phase curing molding is carried out in 30 DEG C of coagulating bath, and tunica fibrosa is wound with up- coiler, then takes silk afterwards；
Hollow-fibre membrane post-processes：The hollow fiber film thread of taking-up carries out heat treatment 20- in 90-110 DEG C of constant temperature oven
40min eliminates film wire thermal stress, is then extracted with soaked in absolute ethyl alcohol, extraction time 20-28 hours, the film wire after extraction exists
90 ~ 110 DEG C of dry 0.5 ~ 1h of thermal finalization are to get polypropylene/multi-walled carbon nanotube hollow-fibre membrane in vacuum drying oven.
8. the preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane according to claim 7, feature
It is：The outer diameter of the polypropylene/multi-walled carbon nanotube hollow-fibre membrane is 1-3mm, porosity 50%-80%.
9. the preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane according to claim 7, feature
It is：The core liquid is sebacic acid dioctyl ester or 1,2- cyclohexane cyclohexanedimethanodibasic dinonyls.
10. the preparation method of high heat conduction polypropylene/multi-walled carbon nanotube hollow-fibre membrane according to claim 7, special
Sign is：The coagulating bath is water-bath, the bath of sebacic acid dioctyl ester or the bath of 1,2- cyclohexane cyclohexanedimethanodibasic dinonyls.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109722752A (en) * | 2018-12-27 | 2019-05-07 | 北京光华纺织集团有限公司 | It is a kind of for weaving the combination yarn and denim of soft wear-resisting polychrome denim |
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