CN115284713A - Polymer composite heat-conducting heterogeneous fiber membrane and preparation method thereof - Google Patents
Polymer composite heat-conducting heterogeneous fiber membrane and preparation method thereof Download PDFInfo
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- 239000012528 membrane Substances 0.000 title claims abstract description 47
- 239000000835 fiber Substances 0.000 title claims abstract description 42
- 229920000642 polymer Polymers 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052582 BN Inorganic materials 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 27
- 239000010410 layer Substances 0.000 claims description 25
- 239000002243 precursor Substances 0.000 claims description 24
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- 239000007788 liquid Substances 0.000 claims description 20
- 238000009210 therapy by ultrasound Methods 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 14
- 238000010041 electrostatic spinning Methods 0.000 claims description 13
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 10
- 229910052796 boron Inorganic materials 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 9
- 238000013329 compounding Methods 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- 238000005119 centrifugation Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
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- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
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- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 26
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 4
- 239000011256 inorganic filler Substances 0.000 description 4
- 229910003475 inorganic filler Inorganic materials 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
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- 230000003301 hydrolyzing effect Effects 0.000 description 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/4358—Polyurethanes
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0292—Polyurethane fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/302—Conductive
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Fibers (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of polymers, and particularly relates to a polymer composite heat conduction heterogeneous fiber membrane and a preparation method thereof. The invention fills the application of boron nitride materials in the field of PU composite materials, utilizes the composite to construct a layered structure in the longitudinal direction of the fiber membrane, is beneficial to the improvement of the thermal conductivity of the fiber membrane, simultaneously reduces the cost of raw materials, and ensures the one-way transmission effect among layers by the composite membrane layer structure assembled layer by layer.
Description
Technical Field
The invention belongs to the technical field of macromolecules, and particularly relates to a macromolecular composite heat-conducting heterogeneous fiber membrane and a preparation method thereof.
Background
The polymer material generally has the advantages of strong plasticity, high modulus and high strength, simple and convenient raw material preparation, low cost and the like, and can well improve the processability and other physical properties of other materials after being compounded with other materials. However, the thermal conductivity of the polymer material is not ideal. Therefore, research and development of the polymer composite material with the heat conduction capability have important significance for the practical application of materials in various related fields.
With the development of technology and the popularization of industrialization, materials such as metal, graphene materials, boron nitride materials, MXene, graphene oxide, graphite and the like are often used in industry to compound polymer materials, so that the obtained polymer composite material has excellent heat conduction performance, and meanwhile, the good physical performance of the original polymer material can be well kept.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-molecular composite heat-conducting heterogeneous fiber membrane, which fills the application of boron nitride materials in the field of PU composite materials, utilizes composite to construct a layered structure in the longitudinal direction of the fiber membrane, is beneficial to improving the heat-conducting property of the fiber membrane, simultaneously reduces the cost of raw materials, and ensures the one-way transmission effect between layers by a layer-by-layer assembled composite membrane layer structure.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a high-molecular composite heat-conducting heterogeneous fiber membrane is formed by compounding a functional boron nitride-PU composite membrane and a pure PU membrane, and the functional boron nitride-PU composite membrane and the pure PU membrane are combined in a staggered mode, namely, a single layer is the functional boron nitride-PU composite membrane, and double layers are pure PU membranes.
The thickness of the functional boron nitride-PU composite film is consistent with that of a pure PU film (finally, a thickness range exists, if not written, the thickness can be in any thickness theoretically, and the content is put in the specification).
The content of the functional boron nitride in the functional boron nitride-PU composite film is 1-20wt%.
The pure PU film is a homogeneous pure PU film.
The preparation method of the high-molecular composite heat-conducting heterogeneous fiber membrane comprises the following steps:
step 1, stirring a raw material h-BN in a mixed solution of deionized water and isopropyl acetone, performing ultrasonic treatment and centrifugation to finally obtain a functionalized boron nitride precipitate, and drying to obtain required functionalized boron nitride powder; the mass ratio of the deionized water to the isopropyl acetone of the mixed solution of the deionized water and the isopropyl acetone is 1;
step 2, mixing the obtained functionalized boron nitride powder with PU melt and DMF solution, carrying out ultrasonic treatment, stirring, and finally defoaming to obtain a functionalized boron nitride/PU precursor liquid, wherein the mass fraction of the functionalized boron nitride is 1-20wt%, the PU content is 80-99wt%, and the concentration of the functionalized boron nitride in the functionalized boron nitride/PU precursor liquid is 1-20mg/L;
step 3, weighing PU solid, melting, fully and uniformly stirring with DMF solution, carrying out ultrasonic treatment on the uniformly stirred solution, stirring again, and defoaming to obtain pure PU precursor liquid; the concentration of the pure PU precursor liquid is 20wt%;
and 4, respectively preparing the functional boron nitride/PU precursor liquid obtained in the step 2 and the pure PU precursor liquid obtained in the step 3 into films through electrostatic spinning, and compounding the composite film and the pure PU film to form a composite fiber film with a single layer being the functional boron nitride/PU composite film and a double layer being the pure PU layer, wherein the parameters of the electrostatic spinning comprise: the voltage is 16kV, the rotating speed of the receiver is 200r/min, and the material returning speed is 0.003mm/s.
From the above description, it can be seen that the present invention has the following advantages:
1. the invention fills the application of boron nitride materials in the field of PU composite materials, utilizes the composite to construct a layered structure in the longitudinal direction of the fiber membrane, is beneficial to improving the thermal conductivity of the fiber membrane, simultaneously reduces the cost of raw materials, and ensures the one-way transmission effect between layers by the composite membrane layer structure assembled layer by layer.
2. The PU material is adopted, belongs to an elastic material, has excellent elastic property and plasticity, and can keep the high elasticity of the PU material and improve the heat conductivity and even the electric conductivity of the PU material by compounding the PU material with the boron nitride material with high thermal conductivity.
3. The invention utilizes the centrifugal force and pressure generated by the high-speed rotation of the roller in the electrostatic spinning process to ensure that the boron nitride is uniformly dispersed and highly oriented, so that the boron nitride forms a continuous network transmission system in the composite film layer, and the heat conduction efficiency in the composite film is greatly improved.
Drawings
FIG. 1 is a scanning electron micrograph of a fibrous membrane of example 1 of the present invention.
Detailed Description
The present invention is described in detail with reference to fig. 1 and the examples, but the present invention is not limited in any way by the claims.
The pretreatment of the functionalized boron nitride powder comprises the following steps: stirring the raw material h-BN in a mixed solution of deionized water and isopropyl acetone, performing ultrasonic treatment and centrifugation to finally obtain a functionalized boron nitride precipitate, and drying to obtain required functionalized boron nitride powder; the mass ratio of the deionized water to the isopropyl acetone of the mixed solution of the deionized water and the isopropyl acetone is 1.
Example 1
A high-molecular composite heat-conducting heterogeneous fiber membrane is prepared from 2% of boron nitride and 98% of PU.
The preparation method of the high-molecular composite heat-conducting heterogeneous fiber membrane comprises the following steps:
step 1, adding the functional boron nitride powder obtained by ultrasonic treatment into a mixed solution of PU melt and DMF solution, carrying out ultrasonic treatment for 30min, stirring for 30min, and carrying out vacuum defoaming treatment to obtain a functional boron nitride/PU precursor solution (the mass fraction of the functional boron nitride is 2%, and the PU content is 98%).
And 2, preparing pure PU precursor liquid, weighing 2g of PU solid, putting the PU solid into an oven to melt, adding 10mL of DMF solution, fully and uniformly stirring, putting the uniformly stirred solution into an ultrasonic machine to carry out ultrasonic treatment for 30min, and putting the solution into a vacuum oven to carry out defoaming for 2 hours after stirring for 30 min.
And 3, respectively preparing the precursor liquid obtained in the steps 1 and 2 into a film by using an electrostatic spinning machine, and compounding the composite film with a pure PU film. Finally forming a composite fiber membrane with 1, 3 and 5 layers of functional boron nitride/PU composite membrane and 2 and 4 layers of pure PU layer, wherein the parameters of electrostatic spinning comprise: the voltage is 16kV, the rotating speed of the receiver is 200r/min, and the material returning speed is 0.003mm/s.
The scanning electron micrograph of the heterogeneous fiber film of example 1 is shown in FIG. 1, and the thermal conductivity of the heterogeneous fiber film prepared in example 1 was measured, and the in-plane thermal conductivity was 3.72 (W.m) -1 ·K -1 ) And a vertical thermal conductivity of 0.62 (W.m) -1 ·K -1 )。
Example 2
A high-molecular composite heat-conducting heterogeneous fiber membrane is prepared from 6% of boron nitride and 94% of PU.
The preparation method of the high-molecular composite heat-conducting heterogeneous fiber membrane comprises the following steps:
step 1, adding the functional boron nitride powder obtained by ultrasonic treatment into a mixed solution of PU melt and DMF solution, carrying out ultrasonic treatment for 30min, stirring for 30min, and carrying out vacuum defoaming treatment to obtain a functional boron nitride/PU precursor solution (the mass fraction of the functional boron nitride is 6%, and the PU content is 94%).
And 2, preparing pure PU precursor liquid, weighing 2g of PU solid, putting the PU solid into an oven to melt, adding 10mL of DMF solution, fully and uniformly stirring, putting the uniformly stirred solution into an ultrasonic machine to carry out ultrasonic treatment for 30min, and putting the solution into a vacuum oven to carry out defoaming for 2 hours after stirring for 30 min.
And 3, respectively preparing the precursor liquid obtained in the steps 1 and 2 into a film by using an electrostatic spinning machine, and compounding the composite film with a pure PU film. Finally forming a composite fiber membrane with 1, 3 and 5 layers of functional boron nitride/PU composite membrane and 2 and 4 layers of pure PU layer, wherein the parameters of electrostatic spinning comprise: the voltage is 16kV, the rotating speed of the receiver is 200r/min, and the material returning speed is 0.003mm/s.
The hetero fiber film prepared in example 1 was tested for thermal conductivity and had an in-plane thermal conductivity of 4.52 (W.m) -1 ·K -1 ) And a vertical thermal conductivity of 0.57 (W.m) -1 ·K -1 )。
Example 3
A high-molecular composite heat-conducting heterogeneous fiber membrane is prepared from 10% of boron nitride and 90% of PU.
The preparation method of the high-molecular composite heat-conducting heterogeneous fiber membrane comprises the following steps:
step 1, adding the functionalized boron nitride powder obtained by ultrasonic treatment into a mixed solution of a PU melt and a DMF solution, carrying out ultrasonic treatment for 30min, stirring for 30min, and carrying out vacuum defoaming treatment to obtain a functionalized boron nitride/PU precursor solution (the mass fraction of the functionalized boron nitride is 10%, and the PU content is 90%).
And 2, preparing pure PU precursor liquid, weighing 2g of PU solid, putting the PU solid into an oven to melt, adding 10mL of DMF solution, fully and uniformly stirring, putting the uniformly stirred solution into an ultrasonic machine to carry out ultrasonic treatment for 30min, and putting the solution into a vacuum oven to carry out defoaming for 2 hours after stirring for 30 min.
And 3, respectively preparing the precursor liquid obtained in the steps 1 and 2 into a film by using an electrostatic spinning machine, and compounding the composite film with a pure PU film. Finally forming a composite fiber membrane with 1, 3 and 5 layers of functional boron nitride/PU composite membrane and 2 and 4 layers of pure PU layer, wherein the parameters of electrostatic spinning comprise: the voltage is 16kV, the rotating speed of the receiver is 200r/min, and the material returning speed is 0.003mm/s.
The hetero fiber film prepared in example 1 was tested for thermal conductivity and had an in-plane thermal conductivity of 5.41 (W.m) -1 ·K -1 ) Vertical thermal conductivity of 0.11 (W.m) -1 ·K -1 )。
Example 4
A high-molecular composite heat-conducting heterogeneous fiber membrane is prepared from 8% of boron nitride, 1% of aluminum isopropoxide and 91% of PU.
The preparation method of the high-molecular composite heat-conducting heterogeneous fiber membrane comprises the following steps:
step 1, adding functional boron nitride powder obtained by ultrasonic treatment and aluminum isopropoxide into a mixed solution of a PU melt and a DMF solution, performing ultrasonic treatment for 30min, stirring for 30min, and performing vacuum defoaming treatment to obtain functional boron nitride/PU precursor liquid (the mass fraction of the functional boron nitride is 6%, the mass fraction of the aluminum isopropoxide is 2%, and the PU content is 92%); the pretreatment mode of the functionalized boron nitride powder comprises the following steps: a1, adding functional boron nitride powder into dimethylformamide for ultrasonic reaction for 1 hour, wherein the ultrasonic temperature is 30 ℃, and the ultrasonic frequency is 50kHz, so as to obtain slurry; a2. filtering the slurry and drying to obtain modified functionalized boron nitride powder; the inorganic filler is subjected to interlayer peeling through ultrasonic treatment combined with strong interaction between a solvent and the filler, and the functional modification of the inorganic filler can be realized through the interlayer peeling of the inorganic filler, so that the interface wettability of the inorganic filler is improved; the mass ratio of the functionalized boron nitride powder to the dimethylformamide is 1;
and 2, preparing pure PU precursor liquid, weighing 2g of PU solid, putting the PU solid into an oven to melt, adding 10mL of DMF solution, fully and uniformly stirring, putting the uniformly stirred solution into an ultrasonic machine to carry out ultrasonic treatment for 30min, and putting the solution into a vacuum oven to carry out defoaming for 2 hours after stirring for 30 min.
Step 3, respectively using an electrostatic spinning machine to manufacture the precursor liquid obtained in the steps 1 and 2 into a film, standing the composite film in situ, hydrolyzing aluminum isopropoxide to form aluminum oxide, self-assembling in situ to form a functionalized boron nitride-aluminum oxide structure, compounding the composite film with a pure PU film to finally form 1, 3 and 5 layers of functionalized boron nitride/PU composite films and 2 and 4 layers of composite fiber films with pure PU layers, wherein the parameters of electrostatic spinning comprise: the voltage is 16kV, the rotating speed of the receiver is 200r/min, the material returning speed is 0.003mm/s, the atmosphere of the in-situ standing is a nitrogen atmosphere containing 5% of water vapor, and the temperature is 150 ℃.
The hetero fiber film prepared in example 1 was tested for thermal conductivity and had an in-plane thermal conductivity of 5.87 (W.m) -1 ·K -1 ) A vertical thermal conductivity of 0.32 (W.m) -1 ·K -1 )。
It should be understood that the detailed description of the invention is only for illustrating the invention and is not limited to the technical solutions described in the embodiments of the invention. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (9)
1. The utility model provides a compound heat conduction heterogeneous fiber membrane of polymer which characterized in that: the composite film is formed by compounding a functional boron nitride-PU composite film and a pure PU film, and the functional boron nitride-PU composite film and the pure PU film are combined in a staggered mode.
2. The polymer composite heat-conducting heterogeneous fiber membrane according to claim 1, wherein: the thickness of the functional boron nitride-PU composite film is consistent with that of a pure PU film.
3. The polymer composite heat-conducting heterogeneous fiber membrane according to claim 1, wherein: the content of the functional boron nitride in the functional boron nitride-PU composite film is 1-20wt%.
4. The polymer composite heat-conducting heterogeneous fiber membrane according to claim 1, wherein: the pure PU film is a homogeneous pure PU film.
5. The polymer composite heat-conducting heterogeneous fiber membrane according to claim 1, wherein: the preparation method of the high-molecular composite heat-conducting heterogeneous fiber membrane comprises the following steps:
step 1, stirring a raw material h-BN in a mixed solution of deionized water and isopropyl acetone, performing ultrasonic treatment and centrifugation to finally obtain a functionalized boron nitride precipitate, and drying to obtain required functionalized boron nitride powder;
step 2, mixing the obtained functionalized boron nitride powder with a PU melt and a DMF solution, carrying out ultrasonic treatment, stirring, and finally defoaming to obtain a functionalized boron nitride/PU precursor solution;
step 3, weighing PU solid, melting, fully and uniformly stirring with DMF solution, carrying out ultrasonic treatment on the uniformly stirred solution, stirring again, and defoaming to obtain pure PU precursor liquid;
and 4, respectively preparing the functional boron nitride/PU precursor liquid obtained in the step 2 and the pure PU precursor liquid obtained in the step 3 into films through electrostatic spinning, and compounding the composite film and the pure PU film to form the composite fiber film with a single layer of the functional boron nitride/PU composite film and a double layer of the pure PU layer.
6. The polymer composite heat-conducting heterogeneous fiber membrane according to claim 5, wherein: the mass ratio of the deionized water to the isopropyl acetone in the mixed solution of the deionized water and the isopropyl acetone in the step 1 is 1.
7. The polymer composite heat-conducting heterogeneous fiber membrane according to claim 5, wherein: the mass fraction of the functionalized boron nitride in the step 2 is 1-20wt%, the PU content is 80-99wt%, and the concentration of the functionalized boron nitride in the functionalized boron nitride/PU precursor liquid is 1-20mg/L.
8. The polymer composite heat-conducting heterogeneous fiber membrane according to claim 5, wherein: the concentration of the pure PU precursor liquid in the step 3 is 20wt%.
9. The polymer composite heat-conducting heterogeneous fiber membrane according to claim 5, wherein: the parameters of the electrostatic spinning in the step 4 comprise: the voltage is 16kV, the rotating speed of the receiver is 200r/min, and the material returning speed is 0.003mm/s.
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| KR20180001609A (en) * | 2016-06-24 | 2018-01-05 | 한국세라믹기술원 | Manufacturing method of boron nitride/polymer composite |
| CN108866819A (en) * | 2017-05-08 | 2018-11-23 | 清华大学 | A kind of polymer nanocomposites and preparation method thereof |
| CN110228248A (en) * | 2019-05-10 | 2019-09-13 | 上海交通大学 | A kind of high thermal conductivity anisotropic polymer based composites and preparation method thereof |
| CN111546739A (en) * | 2020-05-29 | 2020-08-18 | 北京大学 | Laminated heat-conducting composite material and preparation method thereof |
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