CN112143143A - Preparation method of PVDF (polyvinylidene fluoride) -based composite material film with high thermal conductivity - Google Patents
Preparation method of PVDF (polyvinylidene fluoride) -based composite material film with high thermal conductivity Download PDFInfo
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- CN112143143A CN112143143A CN202010911631.4A CN202010911631A CN112143143A CN 112143143 A CN112143143 A CN 112143143A CN 202010911631 A CN202010911631 A CN 202010911631A CN 112143143 A CN112143143 A CN 112143143A
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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
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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
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/16—Homopolymers or copolymers of vinylidene fluoride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
Abstract
The invention relates to a preparation method of a PVDF-based composite material film with high thermal conductivity. At present, two-dimensional materials such as graphene, boron nitride, molybdenum disulfide, metal nanosheets and the like have excellent heat conducting performance, wherein Boron Nitride (BN) is a commonly used heat conducting material and is often used for modifying the heat conductivity of polymer materials, but due to the high forbidden bandwidth (5.5 eV), the requirements of the polymer materials in the field of energy storage cannot be met generally. The invention comprises the following steps: pouring the Ag sheet and the N, N dimethylformamide solution into a serum bottle together, covering the opening of the serum bottle tightly, and then putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment until the Ag sheet is completely dispersed in the N, N dimethylformamide solution; and then adding BN particles into the obtained mixed solution of the Ag sheet and the N, N-dimethylformamide, and then putting the mixed solution into an ultrasonic dispersion instrument for performing ultrasonic treatment until the BN particles are completely dispersed. The method is mainly used for preparing the PVDF-based composite material film with high thermal conductivity.
Description
The technical field is as follows:
the invention relates to the technical field of high-thermal-conductivity materials, in particular to a preparation method of a PVDF (polyvinylidene fluoride) -based composite material film with high thermal conductivity.
Background art:
with the miniaturization and integration of electronic products, a large amount of residual heat is generated in the operation process of the electronic products, so that higher requirements are put on the thermal management capability of the organic composite material used as the energy storage device. Due to the excellent heat-conducting property of two-dimensional materials (graphene, boron nitride, molybdenum disulfide, metal nanosheets and the like), the two-dimensional materials are more widely concerned at home and abroad, wherein Boron Nitride (BN) is used as a commonly-used heat-conducting material and is often used for modifying the heat conductivity of polymer materials, but due to the high forbidden bandwidth (5.5 eV), the requirements of the polymer materials in the field of energy storage cannot be met generally.
The invention content is as follows:
the invention aims to provide a preparation method of a PVDF (polyvinylidene fluoride) -based composite material film with high thermal conductivity, which solves the problem of low thermal conductivity of a composite material taking PVDF as a matrix.
The above purpose is realized by the following technical scheme:
a preparation method of a PVDF-based composite material film with high thermal conductivity comprises the following steps:
step one, pouring the Ag sheet and N, N dimethylformamide solution into a serum bottle together, covering the opening of the serum bottle tightly, then putting the serum bottle into an ultrasonic dispersion instrument, and performing ultrasonic treatment until the Ag sheet is completely dispersed in the N, N dimethylformamide solution;
step two, adding BN particles into the mixed solution of the Ag sheet and the N, N-dimethylformamide obtained in the step one, and then putting the mixed solution into an ultrasonic dispersion instrument for ultrasonic treatment until the BN particles are completely dispersed;
step three, adding a stirring rotor into the serum bottle obtained in the step two, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a heating and stirring switch of the magnetic stirrer, and then adding PVDF-HFP particles into the serum bottle in the stirring process;
step four, preparing a substrate with proper width and thickness after stirring the serum bottle obtained in the step three, cleaning the whole substrate with clear water, selecting a smooth and clean surface of the substrate, washing with deionized water, then washing with absolute ethyl alcohol, finally drying the substrate with a blower, coating the solution stirred in the serum bottle on the substrate, putting the substrate into a high-temperature air-blast drying box for heating, closing the high-temperature air-blast drying box after heating, taking out the substrate, placing the substrate in a container, and taking down the composite film with tweezers.
The preparation method of the PVDF-based composite material film with high thermal conductivity comprises the following steps of enabling the mass of an Ag sheet in the first step to be 0.02g, enabling the solution of N, N-dimethylformamide to be 10ml, enabling ultrasonic dispersion time in the second step to be 40min, enabling the heating temperature of a magnetic stirrer in the third step to be 70 ℃, enabling stirring time to be 1h, enabling the mass of PVDF-HFP in the third step to be 1g, enabling a substrate in the fourth step to be a glass plate, enabling the heating time in the fourth step to be 3h, and enabling the heating temperature to be 80 ℃.
Has the advantages that:
the radial size difference of the BN and Ag pieces adopted by the invention can form a natural polydispersion system in the three-phase composite material, the construction of the polydispersion system can play a positive role in the formation of a heat conduction network in the material, the addition amount of Ag is small, the Ag is well dispersed in a PVDF matrix, the thermal property is greatly improved, the dielectric property is not deteriorated, and the resources are effectively saved. The preparation method is simple in preparation process, economical and practical, is suitable for large-scale industrial production, and has important significance for the new application prospect of PVDF.
Description of the drawings:
FIG. 1 is a scanning electron microscope test chart of a BN/PVDF-HFP composite film with a BN component of 20 wt%;
FIG. 2 is a scanning electron microscope test chart of a BN + Ag/PVDF-HFP composite film with a BN component of 20 wt%;
FIG. 3 is a graph comparing out-of-plane thermal conductivity test results of BN/PVDF-HFP and BN + Ag/PVDF-HFP composite films with different BN components;
FIG. 4 is a graph comparing in-plane thermal conductivity test results of BN/PVDF-HFP and BN + Ag/PVDF-HFP composite films with different BN components;
FIG. 5 is a graph showing the results of dielectric constant tests of BN/PVDF-HFP and BN + Ag/PVDF-HFP composite films of different BN groups;
FIG. 6 is a graph of dielectric loss test results of BN/PVDF-HFP and BN + Ag/PVDF-HFP composite films with different BN components;
FIG. 7 is a graph comparing the results of the AC breakdown tests of BN/PVDF-HFP and BN + Ag/PVDF-HFP composite films with different BN compositions.
The specific implementation mode is as follows:
example 1:
a preparation method of a PVDF-based composite material film with high thermal conductivity comprises the preparation of a BN/PVDF-HFP film filler and the preparation of a BN + Ag/PVDF-HFP composite film filler, and specifically comprises the following steps:
step one, pouring the Ag sheet and N, N dimethylformamide solution into a serum bottle together, covering the opening of the serum bottle tightly, then putting the serum bottle into an ultrasonic dispersion instrument, and performing ultrasonic treatment until the Ag sheet is completely dispersed in the N, N dimethylformamide solution;
step two, adding BN particles into the mixed solution of the Ag sheet and the N, N-dimethylformamide obtained in the step one, and then putting the mixed solution into an ultrasonic dispersion instrument for ultrasonic treatment until the BN particles are completely dispersed;
step three, adding a stirring rotor into the serum bottle obtained in the step two, then placing the serum bottle into a beaker added with silicon oil, placing the beaker on a magnetic stirrer, turning on a heating and stirring switch of the magnetic stirrer, then adding PVDF-HFP particles into the serum bottle in the stirring process, and reducing the rotating speed of the stirrer to prevent the PVDF-HFP particles from splashing on the wall of the serum bottle during adding;
step four, preparing a substrate with proper width and thickness after stirring the serum bottle obtained in the step three, cleaning the whole substrate with clear water, selecting a smooth and clean surface of the substrate, washing with deionized water, then washing with absolute ethyl alcohol, finally drying the substrate with a blower, coating the solution stirred in the serum bottle on the substrate, putting the substrate into a high-temperature air-blast drying box for heating, closing the high-temperature air-blast drying box after heating, taking out the substrate, placing the substrate in a container, and taking down the composite film with tweezers.
Example 2:
the method for preparing the PVDF-based composite material film with high thermal conductivity according to embodiment 1, in the first step, the mass of the Ag sheet is 0.02g, the volume of the N, N dimethylformamide solution is 10ml, the ultrasonic dispersion time in the second step is 40min, the heating temperature of the magnetic stirrer in the third step is 70 ℃, the stirring time is 1h, the mass of PVDF-HFP in the third step is 1g, the substrate in the fourth step is a glass plate, the heating time in the fourth step is 3h, and the heating temperature is 80 ℃.
Example 3:
the preparation method of the PVDF-based composite material film with high thermal conductivity according to the embodiment 1 or 2 comprises the preparation of a BN/PVDF-HFP film filler and the preparation of a BN + Ag/PVDF-HFP composite film filler:
preparation of mono, BN/PVDF-HFP film
And (3) pouring 5wt% of BN particles and 10ml of N, N dimethylformamide solution into a serum bottle together, tightly covering the bottle mouth, and putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment for 40min to completely disperse the BN. After the mixture is completely dispersed, adding a stirring rotor into a serum bottle, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a magnetic stirrer to heat and a stirring switch to 70 ℃, and stirring for 1 h.
PVDF-HFP particles are added to the serum bottle during agitation, and the rotational speed of the agitator is reduced during the addition of PVDF-HFP to prevent the PVDF-HFP particles from splashing onto the walls of the serum bottle. The base plate that width thickness is suitable is prepared after the stirring finishes, washs whole base plate with the clear water, selects the comparatively smooth clean one side of base plate, then washes with the deionized water, and the washing of reuse absolute ethyl alcohol, dries the base plate with the hair-dryer at last, coats the solution of stirring in the serum bottle on the base plate, puts into high temperature air-blast drying cabinet with the base plate and heats, closes high temperature air-blast drying cabinet after the completion, takes out the base plate and places in the container, takes off composite film with tweezers.
Preparation of BN + Ag/PVDF-HFP composite film
Pouring 0.02g of Ag tablets and 10ml of N, N-dimethylformamide solution into a serum bottle together, covering the bottle mouth tightly, and putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment for 40min to completely disperse the Ag tablets in the N, N-dimethylformamide solution. And adding 20wt% of BN into the obtained mixed solution of the Ag sheet and the N, N-dimethylformamide, and putting the mixed solution into an ultrasonic disperser for ultrasonic treatment for 40min to completely disperse the BN. After the mixture is completely dispersed, adding a stirring rotor into a serum bottle, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a magnetic stirrer to heat and a stirring switch to 70 ℃, and stirring for 1 h.
PVDF-HFP particles are added to the serum bottle during agitation, and the rotational speed of the agitator is reduced during the addition of PVDF-HFP to prevent the PVDF-HFP particles from splashing onto the walls of the serum bottle. The base plate that width thickness is suitable is prepared after the stirring finishes, washs whole base plate with the clear water, selects the comparatively smooth clean one side of base plate, then washes with the deionized water, and the washing of reuse absolute ethyl alcohol, dries the base plate with the hair-dryer at last, coats the solution of stirring in the serum bottle on the base plate, puts into high temperature air-blast drying cabinet with the base plate and heats, closes high temperature air-blast drying cabinet after the completion, takes out the base plate and places in the container, takes off composite film with tweezers.
Example 4:
the preparation method of the PVDF-based composite material film with high thermal conductivity according to the embodiment 1 or 2 comprises the preparation of a BN/PVDF-HFP film filler and the preparation of a BN + Ag/PVDF-HFP composite film filler:
preparation of mono, BN/PVDF-HFP film
And (3) pouring 10wt% of BN particles and 10ml of N, N dimethylformamide solution into a serum bottle together, tightly covering the bottle mouth, and putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment for 40min to completely disperse the BN. After the mixture is completely dispersed, adding a stirring rotor into a serum bottle, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a magnetic stirrer to heat and a stirring switch to 70 ℃, and stirring for 1 h.
PVDF-HFP particles are added to the serum bottle during agitation, and the rotational speed of the agitator is reduced during the addition of PVDF-HFP to prevent the PVDF-HFP particles from splashing onto the walls of the serum bottle. The base plate that width thickness is suitable is prepared after the stirring finishes, washs whole base plate with the clear water, selects the comparatively smooth clean one side of base plate, then washes with the deionized water, and the washing of reuse absolute ethyl alcohol, dries the base plate with the hair-dryer at last, coats the solution of stirring in the serum bottle on the base plate, puts into high temperature air-blast drying cabinet with the base plate and heats, closes high temperature air-blast drying cabinet after the completion, takes out the base plate and places in the container, takes off composite film with tweezers.
Preparation of BN + Ag/PVDF-HFP composite film
Pouring 0.02g of Ag tablets and 10ml of N, N-dimethylformamide solution into a serum bottle together, covering the bottle mouth tightly, and putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment for 40min to completely disperse the Ag tablets in the N, N-dimethylformamide solution. And adding 20wt% of BN into the obtained mixed solution of the Ag sheet and the N, N-dimethylformamide, and putting the mixed solution into an ultrasonic disperser for ultrasonic treatment for 40min to completely disperse the BN. After the mixture is completely dispersed, adding a stirring rotor into a serum bottle, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a magnetic stirrer to heat and a stirring switch to 70 ℃, and stirring for 1 h.
PVDF-HFP particles are added to the serum bottle during agitation, and the rotational speed of the agitator is reduced during the addition of PVDF-HFP to prevent the PVDF-HFP particles from splashing onto the walls of the serum bottle. The base plate that width thickness is suitable is prepared after the stirring finishes, washs whole base plate with the clear water, selects the comparatively smooth clean one side of base plate, then washes with the deionized water, and the washing of reuse absolute ethyl alcohol, dries the base plate with the hair-dryer at last, coats the solution of stirring in the serum bottle on the base plate, puts into high temperature air-blast drying cabinet with the base plate and heats, closes high temperature air-blast drying cabinet after the completion, takes out the base plate and places in the container, takes off composite film with tweezers.
Example 5:
the preparation method of the PVDF-based composite material film with high thermal conductivity according to the embodiment 1 or 2 comprises the preparation of a BN/PVDF-HFP film filler and the preparation of a BN + Ag/PVDF-HFP composite film filler:
preparation of mono, BN/PVDF-HFP film
And (3) pouring 15wt% of BN particles and 10ml of N, N dimethylformamide solution into a serum bottle together, tightly covering the bottle mouth, and putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment for 40min to completely disperse the BN. After the mixture is completely dispersed, adding a stirring rotor into a serum bottle, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a magnetic stirrer to heat and a stirring switch to 70 ℃, and stirring for 1 h.
PVDF-HFP particles are added to the serum bottle during agitation, and the rotational speed of the agitator is reduced during the addition of PVDF-HFP to prevent the PVDF-HFP particles from splashing onto the walls of the serum bottle. The base plate that width thickness is suitable is prepared after the stirring finishes, washs whole base plate with the clear water, selects the comparatively smooth clean one side of base plate, then washes with the deionized water, and the washing of reuse absolute ethyl alcohol, dries the base plate with the hair-dryer at last, coats the solution of stirring in the serum bottle on the base plate, puts into high temperature air-blast drying cabinet with the base plate and heats, closes high temperature air-blast drying cabinet after the completion, takes out the base plate and places in the container, takes off composite film with tweezers.
Preparation of BN + Ag/PVDF-HFP composite film
Pouring 0.02g of Ag tablets and 10ml of N, N-dimethylformamide solution into a serum bottle together, covering the bottle mouth tightly, and putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment for 40min to completely disperse the Ag tablets in the N, N-dimethylformamide solution. And adding 20wt% of BN into the obtained mixed solution of the Ag sheet and the N, N-dimethylformamide, and putting the mixed solution into an ultrasonic disperser for ultrasonic treatment for 40min to completely disperse the BN. After the mixture is completely dispersed, adding a stirring rotor into a serum bottle, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a magnetic stirrer to heat and a stirring switch to 70 ℃, and stirring for 1 h.
PVDF-HFP particles are added to the serum bottle during agitation, and the rotational speed of the agitator is reduced during the addition of PVDF-HFP to prevent the PVDF-HFP particles from splashing onto the walls of the serum bottle. The base plate that width thickness is suitable is prepared after the stirring finishes, washs whole base plate with the clear water, selects the comparatively smooth clean one side of base plate, then washes with the deionized water, and the washing of reuse absolute ethyl alcohol, dries the base plate with the hair-dryer at last, coats the solution of stirring in the serum bottle on the base plate, puts into high temperature air-blast drying cabinet with the base plate and heats, closes high temperature air-blast drying cabinet after the completion, takes out the base plate and places in the container, takes off composite film with tweezers.
Example 6:
the preparation method of the PVDF-based composite material film with high thermal conductivity according to the embodiment 1 or 2 comprises the preparation of a BN/PVDF-HFP film filler and the preparation of a BN + Ag/PVDF-HFP composite film filler:
preparation of mono, BN/PVDF-HFP film
And (3) pouring 20wt% of BN particles and 10ml of N, N dimethylformamide solution into a serum bottle together, tightly covering the bottle mouth, and putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment for 40min to completely disperse the BN. After the mixture is completely dispersed, adding a stirring rotor into a serum bottle, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a magnetic stirrer to heat and a stirring switch to 70 ℃, and stirring for 1 h.
PVDF-HFP particles are added to the serum bottle during agitation, and the rotational speed of the agitator is reduced during the addition of PVDF-HFP to prevent the PVDF-HFP particles from splashing onto the walls of the serum bottle. The base plate that width thickness is suitable is prepared after the stirring finishes, washs whole base plate with the clear water, selects the comparatively smooth clean one side of base plate, then washes with the deionized water, and the washing of reuse absolute ethyl alcohol, dries the base plate with the hair-dryer at last, coats the solution of stirring in the serum bottle on the base plate, puts into high temperature air-blast drying cabinet with the base plate and heats, closes high temperature air-blast drying cabinet after the completion, takes out the base plate and places in the container, takes off composite film with tweezers.
Preparation of BN + Ag/PVDF-HFP composite film
Pouring 0.02g of Ag tablets and 10ml of N, N-dimethylformamide solution into a serum bottle together, covering the bottle mouth tightly, and putting the serum bottle into an ultrasonic dispersion instrument for ultrasonic treatment for 40min to completely disperse the Ag tablets in the N, N-dimethylformamide solution. And adding 20wt% of BN into the obtained mixed solution of the Ag sheet and the N, N-dimethylformamide, and putting the mixed solution into an ultrasonic disperser for ultrasonic treatment for 40min to completely disperse the BN. After the mixture is completely dispersed, adding a stirring rotor into a serum bottle, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a magnetic stirrer to heat and a stirring switch to 70 ℃, and stirring for 1 h.
PVDF-HFP particles are added to the serum bottle during agitation, and the rotational speed of the agitator is reduced during the addition of PVDF-HFP to prevent the PVDF-HFP particles from splashing onto the walls of the serum bottle. The base plate that width thickness is suitable is prepared after the stirring finishes, washs whole base plate with the clear water, selects the comparatively smooth clean one side of base plate, then washes with the deionized water, and the washing of reuse absolute ethyl alcohol, dries the base plate with the hair-dryer at last, coats the solution of stirring in the serum bottle on the base plate, puts into high temperature air-blast drying cabinet with the base plate and heats, closes high temperature air-blast drying cabinet after the completion, takes out the base plate and places in the container, takes off composite film with tweezers.
Claims (2)
1. A preparation method of a PVDF-based composite material film with high thermal conductivity is characterized by comprising the following steps: the preparation method comprises the following steps:
step one, pouring the Ag sheet and N, N dimethylformamide solution into a serum bottle together, covering the opening of the serum bottle tightly, then putting the serum bottle into an ultrasonic dispersion instrument, and performing ultrasonic treatment until the Ag sheet is completely dispersed in the N, N dimethylformamide solution;
step two, adding BN particles into the mixed solution of the Ag sheet and the N, N-dimethylformamide obtained in the step one, and then putting the mixed solution into an ultrasonic dispersion instrument for ultrasonic treatment until the BN particles are completely dispersed;
step three, adding a stirring rotor into the serum bottle obtained in the step two, then placing the serum bottle into a beaker added with silicone oil, placing the beaker on a magnetic stirrer, turning on a heating and stirring switch of the magnetic stirrer, and then adding PVDF-HFP particles into the serum bottle in the stirring process;
step four, preparing a substrate with proper width and thickness after stirring the serum bottle obtained in the step three, cleaning the whole substrate with clear water, selecting a smooth and clean surface of the substrate, washing with deionized water, then washing with absolute ethyl alcohol, finally drying the substrate with a blower, coating the solution stirred in the serum bottle on the substrate, putting the substrate into a high-temperature air-blast drying box for heating, closing the high-temperature air-blast drying box after heating, taking out the substrate, placing the substrate in a container, and taking down the composite film with tweezers.
2. The method for preparing a PVDF-based composite material film with high thermal conductivity as claimed in claim 1, wherein: the mass of the Ag sheet in the first step is 0.02g, the volume of the N, N-dimethylformamide solution is 10ml, the ultrasonic dispersion time in the second step is 40min, the heating temperature of the magnetic stirrer in the third step is 70 ℃, the stirring time is 1h, the mass of PVDF-HFP in the third step is 1g, the substrate in the fourth step is a glass plate, the heating time in the fourth step is 3h, and the heating temperature is 80 ℃.
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| CN112897591A (en) * | 2021-01-21 | 2021-06-04 | 哈尔滨理工大学 | alpha-FeOOH @3DGF quadrangular prism material and synthesis method and application thereof |
| CN113733697A (en) * | 2021-08-11 | 2021-12-03 | 哈尔滨理工大学 | High-sensitivity wide-sensing-range flexible composite film and application thereof |
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| CN111154126A (en) * | 2020-01-16 | 2020-05-15 | 哈尔滨工业大学 | Preparation method of nano-diamond modified boron nitride high-flexibility high-thermal-conductivity composite film |
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| CN112897591A (en) * | 2021-01-21 | 2021-06-04 | 哈尔滨理工大学 | alpha-FeOOH @3DGF quadrangular prism material and synthesis method and application thereof |
| CN113733697A (en) * | 2021-08-11 | 2021-12-03 | 哈尔滨理工大学 | High-sensitivity wide-sensing-range flexible composite film and application thereof |
| CN113733697B (en) * | 2021-08-11 | 2023-05-19 | 哈尔滨理工大学 | High-sensitivity flexible composite film with wide sensing range and application thereof |
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Application publication date: 20201229 |