CN117143377A - Preparation method and application of polycarbonate and polyurethane blend type film - Google Patents
Preparation method and application of polycarbonate and polyurethane blend type film Download PDFInfo
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- CN117143377A CN117143377A CN202311179212.6A CN202311179212A CN117143377A CN 117143377 A CN117143377 A CN 117143377A CN 202311179212 A CN202311179212 A CN 202311179212A CN 117143377 A CN117143377 A CN 117143377A
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 101
- 239000004814 polyurethane Substances 0.000 title claims abstract description 101
- 239000004417 polycarbonate Substances 0.000 title claims abstract description 75
- 239000000203 mixture Substances 0.000 title claims abstract description 67
- 229920001692 polycarbonate urethane Polymers 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 41
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 30
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 16
- 239000011259 mixed solution Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000243 solution Substances 0.000 claims abstract description 12
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 239000003599 detergent Substances 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 5
- 230000015556 catabolic process Effects 0.000 abstract description 30
- 239000002131 composite material Substances 0.000 abstract description 22
- 229920006289 polycarbonate film Polymers 0.000 description 26
- 238000004146 energy storage Methods 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/14—Organic dielectrics
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
A preparation method and application of a polycarbonate and polyurethane blend type film relate to the technical field of composite film preparation. The invention aims to solve the problem that the traditional composite material film cannot have both high dielectric constant and high breakdown strength. The method comprises the following steps: adding polycarbonate particles and polyurethane particles into tetrahydrofuran solution, and mechanically stirring for 10-12 hours at the temperature of 20-25 ℃ to obtain mixed solution, wherein the polyurethane particles account for 10%, 20% or 30% of the total mass of the polycarbonate particles and the polyurethane particles; uniformly coating the mixed solution on one surface of the pretreated substrate, and then placing the substrate in a blast oven for drying for 10-12 hours; and after the drying is finished, placing the substrate in a vacuum oven to continuously dry for 10-12 hours, cooling the dried substrate to room temperature, and stripping to obtain the polycarbonate and polyurethane blended film. The invention can obtain a preparation method and application of a polycarbonate and polyurethane blend type film.
Description
Technical Field
The invention relates to the technical field of composite film preparation, in particular to a preparation method and application of a polycarbonate and polyurethane blend film.
Background
The development of advanced energy storage materials is urgent in order to meet the increasing demands of modern electronic and power systems. Polymer dielectrics are currently the material of choice for high energy density capacitors due to their high breakdown strength and excellent mechanical properties. However, the inherently low dielectric constant of polymer dielectrics limits its energy density, and extensive research has been conducted to increase the energy density of polymers, such as incorporating inorganic fillers with high dielectric constants into the polymeric matrix to form polymer composites. However, the increase in dielectric constant brought about by the introduction of high dielectric constant fillers is generally at the cost of a reduction in their breakdown field strength, and therefore the increase in energy density is very limited. In recent years, the preparation of polymer dielectrics into a multilayer structure becomes an emerging method for solving the contradiction between high dielectric constant and high breakdown field strength in a single-layer composite film, so that the capacitance energy storage performance of the single-layer composite film is remarkably improved.
Disclosure of Invention
The invention aims to solve the problem that the traditional composite material film cannot have high dielectric constant and high breakdown strength, and provides a preparation method and application of a polycarbonate and polyurethane blend film.
The preparation method of the polycarbonate and polyurethane blend type film comprises the following steps:
step one: adding polycarbonate particles and polyurethane particles into tetrahydrofuran solution, and mechanically stirring for 10-12 hours at the temperature of 20-25 ℃ to obtain mixed solution, wherein the polyurethane particles account for 10%, 20% or 30% of the total mass of the polycarbonate particles and the polyurethane particles;
step two: uniformly coating the mixed solution on one surface of the pretreated substrate, and then placing the substrate in a blast oven for drying for 10-12 hours; and after the drying is finished, placing the substrate in a vacuum oven to continuously dry for 10-12 hours, cooling the dried substrate to room temperature, and stripping to obtain the polycarbonate and polyurethane blended film.
The application of the polycarbonate and polyurethane blend type film in the super capacitor.
The invention has the beneficial effects that:
(1) The invention relates to a preparation method of a polycarbonate and polyurethane blend type film, which is prepared by dissolving PC particles and TPU particles in tetrahydrofuran according to different mass ratios to prepare a mixed solution, coating the mixed solution and then drying the coated film. According to the energy storage density calculation formula, the energy storage density is set to be a, the dielectric constant is set to be b, and the breakdown strength is set to be c, wherein a=1/2×b×c2. Therefore, according to the above formula, in order to effectively increase the energy storage density of the composite material, it is the best strategy to increase the dielectric constant and breakdown strength at the same time, that is, the energy storage density naturally increases with the increase of the dielectric constant and breakdown field strength. On the basis, the TPU with higher dielectric constant compared with PC is doped in PC, so that the dielectric constant of the doped composite material is improved, and the energy storage density is also improved. Since the pure PC film itself has high breakdown strength, and the TPU has a certain degree of self-repairing capability and can absorb a certain degree of impact energy, the pure PC film can maintain all or most of the original structure when being subjected to high voltage impact. In conclusion, compared with a pure PC film, the TPU-doped composite film greatly improves the dielectric constant, and meanwhile, the high breakdown strength of the PC is reserved, so that the problem that the traditional composite film cannot have both high dielectric constant and high breakdown strength is effectively solved.
(2) The polycarbonate and polyurethane blend film prepared by the method has excellent dielectric property, breakdown property and energy storage property, provides a new material for high-performance super capacitors, and can be widely applied to advanced fields such as electric, electronic and new energy automobiles. The preparation equipment and the process are simple, the implementation is easy, the cost is low, the environment is protected, no pollution is caused, and a good strategy is provided for developing an advanced polymer capacitor.
The invention can obtain a preparation method and application of a polycarbonate and polyurethane blend type film.
Drawings
FIG. 1 is a test infrared spectrum of a pure polycarbonate film and a polycarbonate-polyurethane blended film, a represents a pure polycarbonate film, b represents a polycarbonate-polyurethane blended film in example 3, c represents a polycarbonate-polyurethane blended film in example 2, and d represents a polycarbonate-polyurethane blended film in example 1;
FIG. 2 is a direct current breakdown Weibull plot for a pure polycarbonate film and a polycarbonate-polyurethane blend film, +.The pure polycarbonate film of comparative example 1, & polycarbonate-polyurethane blend film of example 2, & polycarbonate-polyurethane blend film of example 3;
FIG. 3 shows the dielectric constant test results for pure polycarbonate films and polycarbonate-polyurethane blend films, +.;
FIG. 4 shows the results of energy storage tests for a pure polycarbonate film and a polycarbonate-polyurethane blend film, with ∈ showing the pure polycarbonate film of comparative example 1, with respect to the polycarbonate-polyurethane blend film of example 2, with respect to the solid-state, and with respect to the polycarbonate-polyurethane blend film of example 3;
FIG. 5 shows the results of the charge and discharge efficiency test for the pure polycarbonate film and the polycarbonate-polyurethane blend film, with ∈ indicating the pure polycarbonate film of comparative example 1, with respect to the polycarbonate-polyurethane blend film of example 1, with respect to the solid-state indicating the polycarbonate-polyurethane blend film of example 2, and with respect to the polycarbonate-polyurethane blend film of example 3.
Detailed Description
The first embodiment is as follows: the preparation method of the polycarbonate and polyurethane blend type film comprises the following steps:
step one: adding polycarbonate particles and polyurethane particles into tetrahydrofuran solution, and mechanically stirring for 10-12 hours at the temperature of 20-25 ℃ to obtain mixed solution, wherein the polyurethane particles account for 10%, 20% or 30% of the total mass of the polycarbonate particles and the polyurethane particles;
step two: uniformly coating the mixed solution on one surface of the pretreated substrate, and then placing the substrate in a blast oven for drying for 10-12 hours; and after the drying is finished, placing the substrate in a vacuum oven to continuously dry for 10-12 hours, cooling the dried substrate to room temperature, and stripping to obtain the polycarbonate and polyurethane blended film.
The beneficial effect of this embodiment is:
(1) The polycarbonate and polyurethane blend type film is prepared by dissolving PC particles and TPU particles in tetrahydrofuran according to different mass ratios to prepare a mixed solution, coating the mixed solution, and then drying the coated film. According to the energy storage density calculation formula, the energy storage density is set to be a, the dielectric constant is set to be b, and the breakdown strength is set to be c, wherein a=1/2×b×c2. Therefore, according to the above formula, in order to effectively increase the energy storage density of the composite material, it is the best strategy to increase the dielectric constant and breakdown strength at the same time, that is, the energy storage density naturally increases with the increase of the dielectric constant and breakdown field strength. On the basis, the TPU with higher dielectric constant compared with PC is doped in the PC, so that the dielectric constant of the doped composite material is improved, and the energy storage density is also improved. Since the pure PC film itself has high breakdown strength, and the TPU has a certain degree of self-repairing capability and can absorb a certain degree of impact energy, the pure PC film can maintain all or most of the original structure when being subjected to high voltage impact. In summary, compared with a pure PC film, the TPU-doped composite film of the embodiment greatly improves the dielectric constant, and meanwhile, the high breakdown strength of PC is reserved, so that the problem that the traditional composite film cannot have both high dielectric constant and high breakdown strength is effectively solved.
(2) The polycarbonate and polyurethane blend film prepared by the method has excellent dielectric property, breakdown property and energy storage property, provides a new material for high-performance super capacitors, and can be widely applied to advanced fields such as electric, electronic and new energy automobiles. The preparation equipment and the process of the embodiment are simple, the implementation is easy, the cost is low, the environment is protected, no pollution is caused, and a good strategy is provided for developing the advanced polymer capacitor.
The second embodiment is as follows: the present embodiment differs from the specific embodiment in that: the ratio of the total mass of the polycarbonate particles and the polyurethane particles to the volume of the tetrahydrofuran solution in the first step is (1.75 to 1.85) g: (10-10.6) mL.
The other steps are the same as in the first embodiment.
And a third specific embodiment: the present embodiment differs from the first or second embodiment in that: in the first step, a magnetic stirrer is adopted for mechanical stirring, and the stirring speed is 350-400 r/min.
Other steps are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: one difference between this embodiment and the first to third embodiments is that: the pretreated substrate in the second step is processed according to the following steps: the method comprises the steps of firstly cleaning a substrate with water added with detergent for 3-5 times, then cleaning with clear water for 3-5 times, then cleaning with absolute ethyl alcohol for 3-5 times, and finally drying with a blower to obtain a pretreated substrate.
Other steps are the same as those of the first to third embodiments.
Fifth embodiment: one to four differences between the present embodiment and the specific embodiment are: the substrate is a glass plate.
Other steps are the same as those of the first to fourth embodiments.
Specific embodiment six: the present embodiment differs from the first to fifth embodiments in that: and in the second step, the substrate is placed in a blast oven to be heated to 60-70 ℃.
Other steps are the same as those of the first to fifth embodiments.
Seventh embodiment: one difference between the present embodiment and the first to sixth embodiments is that: and in the second step, the substrate is placed in a vacuum oven and heated to 80-90 ℃.
Other steps are the same as those of embodiments one to six.
Eighth embodiment: one difference between the present embodiment and the first to seventh embodiments is that: and in the second step, the cooled substrate is peeled off by deionized water.
Other steps are the same as those of embodiments one to seven.
Detailed description nine: one of the differences between this embodiment and the first to eighth embodiments is: the thickness of the polycarbonate and polyurethane blend type film in the second step is 10-12 mu m.
Other steps are the same as those of embodiments one to eight.
Detailed description ten: the embodiment relates to an application of a polycarbonate and polyurethane blend type film, and the application of the polycarbonate and polyurethane blend type film in a super capacitor.
The following examples are used to verify the benefits of the present invention:
example 1: a preparation method of a Polycarbonate (PC) and polyurethane (TPU) blending type film comprises the following steps:
step one: 1.575g of polycarbonate particles and 0.175g of polyurethane particles were added to 10mL of tetrahydrofuran solution, and the mixture was mechanically stirred at a stirring speed of 350r/min for 10 hours at a temperature of 25℃to obtain a mixed solution;
the polycarbonate particles and the polyurethane particles in the first step are put into a dryer for drying before use, and moisture is removed;
step two: firstly, cleaning a glass plate with water added with detergent for 3 times, then cleaning the glass plate with clear water for 3 times, then cleaning the glass plate with absolute ethyl alcohol for 3 times, and finally evaporating the alcohol with a blower to obtain a pretreated glass plate;
uniformly coating the mixed solution on one surface of the pretreated glass plate, then placing the glass plate in a blast oven, heating to 60 ℃ and drying for 10 hours, and evaporating the solution; after the drying is finished, placing the mixture in a vacuum oven, heating to 80 ℃ and continuously drying for 10 hours, and accelerating the formation of a composite film and exhausting bubbles; and cooling the dried glass plate to room temperature, and stripping the film by using deionized water to obtain the polycarbonate and polyurethane blend type film, wherein the thickness of the polycarbonate and polyurethane blend type film is 10-12 mu m.
The polyurethane particles in this example account for 10% of the total mass of the polycarbonate particles and polyurethane particles.
Example 2: the polyurethane particles in this example account for 20% of the total mass of the polycarbonate particles and polyurethane particles. Other experimental conditions were the same as in example 1.
Example 3: the polyurethane particles in this example account for 30% of the total mass of the polycarbonate particles and polyurethane particles. Other experimental conditions were the same as in example 1.
Comparative example 1: preparing a Polycarbonate (PC) film;
step one: the ratio of the mass of polycarbonate to the volume of the tetrahydrofuran solution was 1.758g:10mL of polycarbonate and tetrahydrofuran solution are taken respectively; adding polycarbonate into tetrahydrofuran solution, and mechanically stirring for 10 hours at the temperature of 25 ℃ to obtain polycarbonate solution;
step two, putting the coated glass plate into a blast oven at 60 ℃ for heating and heat preservation for 10 hours; transferring the heated glass plate into a vacuum oven, heating and preserving heat at 80 ℃ under vacuum state, and soaking for 10 hours; and taking out, and then stripping the film by using deionized water to obtain the polycarbonate film.
FIG. 1 is a test infrared spectrum of a pure polycarbonate film and a polycarbonate-polyurethane blend film, a represents a pure polycarbonate film, b represents a polycarbonate-polyurethane blend film in example 3, c represents a polycarbonate-polyurethane blend film in example 2, and d represents a polycarbonate-polyurethane blend film in example 1.
As shown in FIG. 1, the wave number is 1506cm -1 And 1776cm -1 There are two strong transmission peaks corresponding to PC and the stretching vibration aromatic ring of C=O, respectively, and in addition at 3300cm -1 And 1730cm -1 The absorption peak at this point represents the TPU. Furthermore, no new peaks appear in the polycarbonate and polyurethane blend film, which demonstrates that PC and TPU are only physically synthesized and no new species are produced.
FIG. 2 is a direct current breakdown Weibull plot for a pure polycarbonate film and a polycarbonate-polyurethane blend film, +.The pure polycarbonate film of comparative example 1, & polycarbonate-polyurethane blend film of example 2, & polycarbonate-polyurethane blend film of example 3.
As shown in FIG. 2, the films of examples 1 and 2 have somewhat improved breakdown strength compared to the pure polycarbonate film, while the polycarbonate and polyurethane blend film of example 3 has reduced breakdown strength compared to the pure polycarbonate film. As a result of comparing the film of example 1 with the film of example 2, which had the highest breakdown field strength, 667.7MV mm was achieved -1 The breakdown strength of the film is improved by 24% compared with that of a pure polycarbonate film. With the introduction of more polyurethane, after the mass fraction reaches 30%, the breakdown strength is obviously reduced. The tendency of increasing and then decreasing is generally presented, because the proper polyurethane is introduced into the polycarbonate and mixed with the polycarbonate to form an interface, and the proper interface has an effect of blocking electrons, so that the breakdown strength is improved. However, as excessive interfaces are generated, conductive channels are easily formed inside the composite material, and breakdown strength begins to decrease.
FIG. 3 shows the dielectric constant test results of a pure polycarbonate film and a polycarbonate-polyurethane blend film, wherein, the ∈ indicates the pure polycarbonate film in comparative example 1, the poly-carbonate-polyurethane blend film in example 2, and the poly-carbonate-polyurethane blend film in example 3.
As shown in fig. 3, the dielectric constants of the polycarbonate and polyurethane blend type film in examples 1 and 3 were greatly improved relative to the pure polycarbonate film except for the polycarbonate and polyurethane blend type film in example 2, wherein the improvement was most remarkable in example 3 and the degree of improvement was the greatest. Examples 1-3 show a tendency that the dielectric constant increases first and then decreases and then increases with increasing polyurethane content. At 1Hz, the dielectric constant of the polycarbonate and polyurethane blend film in example 3 is close to 4.5, because the dielectric constants of the polycarbonate and polyurethane are not low, and the dielectric constant of the composite material is synergistically improved after the polycarbonate and polyurethane blend film are mixed.
FIG. 4 shows the results of energy storage tests of a pure polycarbonate film and a polycarbonate-polyurethane blend film, with ∈ showing the pure polycarbonate film of comparative example 1, with respect to the polycarbonate-polyurethane blend film of example 2, with respect to the solid-state, and with respect to the polycarbonate-polyurethane blend film of example 3.
As shown in fig. 4, the energy storage effect of the polycarbonate and polyurethane blend film in examples 1-3 is improved compared with that of the pure PC film, wherein the composite material in example 3 is improved the highest, so that the improvement of the dielectric constant compensates the disadvantage of the reduction of the breakdown field strength, and the energy storage effect is optimized. While example 1 and example 2 have superior breakdown strength to example 3, they have the disadvantage of lower dielectric constant, and thus the energy storage effect according to the energy density calculation formula and the energy storage test is not as good as that of the composite material of example 3.
FIG. 5 shows the results of the charge and discharge efficiency test for the pure polycarbonate film and the polycarbonate-polyurethane blend film, with ∈ indicating the pure polycarbonate film of comparative example 1, with respect to the polycarbonate-polyurethane blend film of example 1, with respect to the solid-state indicating the polycarbonate-polyurethane blend film of example 2, and with respect to the polycarbonate-polyurethane blend film of example 3.
As shown in fig. 5, the polycarbonate and polyurethane blend film of example 1 has improved charge and discharge efficiency compared to the pure polycarbonate film, but the composite materials of example 2 and example 3 have reduced charge and discharge efficiency compared to the pure polycarbonate film. The composite material of example 3, which has the best energy storage effect, has a much lower efficiency but remains substantially above 85%.
Claims (10)
1. The preparation method of the polycarbonate and polyurethane blend type film is characterized by comprising the following steps:
step one: adding polycarbonate particles and polyurethane particles into tetrahydrofuran solution, and mechanically stirring for 10-12 hours at the temperature of 20-25 ℃ to obtain mixed solution, wherein the polyurethane particles account for 10%, 20% or 30% of the total mass of the polycarbonate particles and the polyurethane particles;
step two: uniformly coating the mixed solution on one surface of the pretreated substrate, and then placing the substrate in a blast oven for drying for 10-12 hours; and after the drying is finished, placing the substrate in a vacuum oven to continuously dry for 10-12 hours, cooling the dried substrate to room temperature, and stripping to obtain the polycarbonate and polyurethane blended film.
2. The method for producing a polycarbonate-polyurethane blended film according to claim 1, wherein the ratio of the total mass of the polycarbonate particles and the polyurethane particles to the volume of the tetrahydrofuran solution in the step one is (1.75 to 1.85) g: (10-10.6) mL.
3. The method for preparing a polycarbonate and polyurethane blend film according to claim 1, wherein in the first step, a magnetic stirrer is used for mechanical stirring, and the stirring speed is 350-400 r/min.
4. The method for preparing a polycarbonate-polyurethane blend film according to claim 1, wherein the pretreated substrate in the second step is treated by: the method comprises the steps of firstly cleaning a substrate with water added with detergent for 3-5 times, then cleaning with clear water for 3-5 times, then cleaning with absolute ethyl alcohol for 3-5 times, and finally drying with a blower to obtain a pretreated substrate.
5. The method for producing a polycarbonate-polyurethane blend film according to claim 1 or 4, wherein the substrate is a glass plate.
6. The method for producing a polycarbonate-polyurethane blend film according to claim 1, wherein in the second step, the substrate is heated to 60 to 70 ℃ in a blast oven.
7. The method for producing a polycarbonate-polyurethane blend film according to claim 1, wherein the substrate is heated to 80 to 90 ℃ in a vacuum oven.
8. The method for preparing a polycarbonate-polyurethane blend film according to claim 1, wherein the cooled substrate is peeled off by deionized water in the second step.
9. The method for producing a polycarbonate-polyurethane blend film according to claim 1, wherein the thickness of the polycarbonate-polyurethane blend film in the second step is 10 μm to 12. Mu.m.
10. Use of a polycarbonate and polyurethane blend film prepared by the method of any one of claims 1-9 in a supercapacitor.
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| CN115547687A (en) * | 2022-09-27 | 2022-12-30 | 中国科学院电工研究所 | All-organic dielectric film with sandwich structure and preparation method thereof |
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| KR100813177B1 (en) * | 2006-10-12 | 2008-03-17 | 한국과학기술연구원 | Composite dielectric film including polymer and high dielectric ceramic coated metallic particles and capacitor including the same |
| CN114308588A (en) * | 2021-12-27 | 2022-04-12 | 安徽安利材料科技股份有限公司 | Preparation method and application of water-based solvent-free polyurethane/PC (polycarbonate) film composite material |
| CN115547687A (en) * | 2022-09-27 | 2022-12-30 | 中国科学院电工研究所 | All-organic dielectric film with sandwich structure and preparation method thereof |
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