Heat-dissipation insulating paint based on battery and spraying process of heat-dissipation insulating paint

Abstract

The present invention discloses a battery-based heat dissipation insulating paint and a spraying process thereof, and relates to the technical field of heat dissipation insulating paint, the battery-based heat dissipation insulating paint is prepared from the following components: 4, 4 '-methylene bis (N, N-diglycidyl aniline), 4, 4'-sulfonyl dianiline, and epoxy functionalized composite microspheres; the epoxy functionalized composite microspheres are prepared from composite microspheres subjected to insulation treatment and gamma-(2, 3-epoxypropoxy) propyl trimethoxy silane, and the epoxy functionalized composite microspheres are prepared from the composite microspheres subjected to insulation treatment and the gamma-(2, 3-epoxypropoxy) propyl trimethoxy silane. The spraying process is an electrostatic spraying process, and the parameters of the electrostatic spraying process are as follows: the atomization air pressure is 0.3-0.5 MPa, the gun moving speed is 0.5-1.2 m / s, the environment humidity is less than or equal to 60% RH, the spraying thickness is 50-200 microns, the curing temperature is 180-185 DEG C, and the curing time is 3-3.5 hours.

Description

Technical Field

[0001] The invention relates to the technical field of heat dissipation insulating paint, in particular to a battery-based heat dissipation insulating paint and a spraying process thereof. Background Art

[0002] In the existing technology, the way to improve the heat dissipation efficiency by increasing the heat dissipation area or changing the material (such as copper replacing aluminum) often leads to an increase in volume and weight, which in turn aggravates the problems of energy consumption and operational stability; although the introduction of heat pipes can quickly conduct heat, there is a risk of failure after thermal equilibrium. In the field of insulating coatings, the high VOC pollution of traditional solvent-based coatings and the insufficient comprehensive performance of water-based paints (such as salt spray resistance and mechanical property defects), as well as the partial discharge problem caused by the loose fit between the insulating paper and the battery casing, all highlight the urgency of developing new heat dissipation insulating materials.

[0003] Therefore, it is of great significance to invent a battery-based heat dissipation insulating paint and a spraying process thereof. Summary of the invention

[0004] The object of the present invention is to provide a battery-based heat dissipation insulating paint and a spraying process thereof to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A battery-based heat dissipation insulating paint, wherein the battery-based heat dissipation insulating paint is prepared from the following components, including 4,4'-methylenebis(N,N-diglycidylaniline), 4,4'-sulfonyl dianiline, and epoxy functionalized composite microspheres; Furthermore, the epoxy functionalized composite microspheres are prepared from insulating treated composite microspheres and γ-(2,3-epoxypropoxy)propyltrimethoxysilane.

[0006] Furthermore, the alumina particles have a particle size of 5-6 μm; Furthermore, the epoxy resin is bisphenol A type, model number is YD-128; Furthermore, the polystyrene model is PG-383; Furthermore, the preparation method of the battery-based heat dissipation insulating paint comprises the following steps: 4,4'-methylenebis(N,N-diglycidylaniline) and epoxy functionalized composite microspheres are mixed evenly, 4,4'-sulfonyl dianiline is added, heated to 150-155°C, stirred evenly, and vacuum degassed to obtain the battery-based heat dissipation insulating paint; Furthermore, in the preparation process of the battery-based heat dissipation insulating paint, the mass ratio of 4,4'-methylenebis(N,N-diglycidylaniline):4,4'-sulfonyldianiline:epoxy functionalized composite microspheres is 1:0.6:(0.15-0.3).

[0007] Furthermore, the preparation method of the epoxy functionalized composite microspheres comprises the following steps: adding the insulating treated composite microspheres into deionized water, ultrasonically dispersing, adding methanol and γ-(2,3-epoxypropoxy)propyltrimethoxysilane, adjusting the pH of the reaction system to 3.0 with acetic acid, heating to 55-57° C. for 6-6.5 hours, filtering, washing the product with deionized water, and freeze drying to obtain epoxy functionalized composite microspheres; Furthermore, in the preparation process of the epoxy functionalized composite microspheres, the mass ratio of the insulating treated composite microspheres to γ-(2,3-epoxypropoxy)propyltrimethoxysilane is 10:(1-1.5).

[0008] Furthermore, the preparation method of the insulating composite microspheres comprises the following steps: adding the composite microspheres to an ethanol aqueous solution with a volume ratio of 10:1, ultrasonically dispersing, adding ammonium hydroxide and hexadecyltrimethylammonium bromide, ultrasonically dispersing, adding tetraethyl orthosilicate and 3-methacryloxypropyltrimethoxysilane, hydrolyzing and condensing for 8-9 hours, centrifuging, washing the product alternately with ethanol and deionized water, and vacuum drying at 60-65° C. to obtain insulating composite microspheres; Furthermore, in the preparation process of the insulating treated composite microspheres, the proportions of the components are calculated by mass and include: 0.1-0.15 parts of composite microspheres, 9-10 parts of ammonium hydroxide, 0.015-0.02 parts of hexadecyltrimethylammonium bromide, 5-6 parts of tetraethyl orthosilicate, and 5-6 parts of 3-methacryloxypropyltrimethoxysilane; wherein the mass ratio of tetraethyl orthosilicate:3-methacryloxypropyltrimethoxysilane is 1:1.

[0009] Furthermore, the preparation method of the composite microspheres comprises the following steps: adding epoxy resin to deionized water at 80-85°C, adding sodium dodecyl sulfate, stirring evenly, adding composite polymer particles, stirring evenly, heating to 120-125°C for reflux reaction for 24 hours, adding polyetheramine curing agent and carbon nanotube-boron nitride nanosheet composite material, keeping warm and stirring for 2-3 hours, centrifuging, washing the product, and freeze-drying to obtain composite microspheres; Furthermore, in the preparation process of the composite microspheres, the proportions of the components are calculated by mass and include: 8-10 parts of epoxy resin, 0.005-0.006 parts of sodium dodecyl sulfate, 0.5-1 parts of composite polymer particles, 5-6 parts of polyetheramine curing agent, and 1-2 parts of carbon nanotube-boron nitride nanosheet composite material.

[0010] Furthermore, the preparation method of the composite polymer particles comprises the following steps: adding alumina particles and multi-walled carbon nanotubes to polystyrene, heating to 190-195° C. for melt blending, grinding and screening the mixed product to obtain composite polymer particles; Furthermore, in the preparation process of the composite polymer particles, the proportions of the components, by weight percentage, include: 0.5-0.8wt% alumina particles, 0.5-1.0wt% multi-walled carbon nanotubes, and the rest polystyrene.

[0011] Furthermore, the preparation method of the carbon nanotube-boron nitride nanosheet composite material comprises the following steps: adding boron nitride nanosheets and nickel acetate to isopropanol, ultrasonically dispersing for 6-7 hours, magnetically stirring for 12-13 hours, and rotary evaporating at 60-65° C. to obtain a nickel salt-boron nitride nanosheet precursor; placing the nickel salt-boron nitride nanosheet precursor in a fluidized bed reactor for reduction and carbon nanotube growth, and cooling to room temperature to obtain a carbon nanotube-boron nitride nanosheet composite material; Furthermore, the boron nitride nanosheets are prepared by a supercritical carbon dioxide exfoliation method.

[0012] Furthermore, the reduction process parameters include: temperature of 500-505° C., gas flow of argon-hydrogen mixed gas, argon flow rate of 300-305 sccm, hydrogen flow rate of 30-31 sscm, and reaction time of 10-10.5 min.

[0013] Furthermore, the carbon nanotube growth process parameters include: temperature of 660-665° C., gas flow of ethylene, ethylene flow rate of 30-30.5 sscm, and reaction time of 5-15 min.

[0014] A spraying process for heat dissipation insulating paint based on a battery, the spraying process is an electrostatic spraying process, and the electrostatic spraying process parameters include: atomization air pressure: 0.3-0.5MPa, gun speed: 0.5-1.2m / s, ambient humidity: ≤60%RH, spraying thickness: 50-200μm, curing temperature: 180-185℃, and curing time 3-3.5h.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The composite microspheres in the present invention are based on polystyrene, with aluminum oxide and multi-walled carbon nanotubes dispersed inside, and carbon nanotube-boron nitride nanosheets coated on the outside. Aluminum oxide and multi-walled carbon nanotubes form a synergistic heat conduction path in the matrix, and carbon nanotube-boron nitride nanosheets form a continuous outer network after electrostatic spraying, which further reduces the interfacial thermal resistance. At the same time, carbon nanotube-boron nitride nanosheets can also be combined with the heat conduction paths between different composite microspheres to further improve the thermal conductivity. Carbon nanotubes act as a "bridge" to connect carbon nanotube-boron nitride nanosheets to form a three-dimensional heat conduction network that runs through the coating. The surface of the microspheres is functionalized by γ-(2,3-epoxypropoxy)propyltrimethoxysilane to enhance the interface bonding between carbon nanotube-boron nitride nanosheets and epoxy resin, and reduce phonon scattering.

[0016] 2. Through the hydrolysis and condensation reaction of ethyl orthosilicate and 3-methacryloxypropyltrimethoxysilane, a dense SiO2 insulating layer is formed on the surface of the microspheres, and the exposed carbon nanotubes in the carbon nanotube-boron nitride nanosheet structure are insulated, which effectively improves the insulation performance without affecting the thermal conductivity.

[0017] 3. This invention successfully solves the industry problem of the difficulty in synergistically improving high thermal conductivity and electrical insulation through the design of composite microsphere structure and innovation of electrostatic spraying process. Its core mechanism includes: (1) the construction of synergistic thermal conductive network of inner and outer fillers; (2) the insulating barrier effect of carbon nanotube-boron nitride nanosheets and chemical bonding interface; (3) uniform dispersion and orientation control driven by spraying process; the heat dissipation insulating paint with excellent mechanical strength and thermal stability is prepared, which has broad application prospects in power batteries, high-power LEDs and other fields. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the following examples, a method for preparing a carbon nanotube-boron nitride nanosheet composite material comprises the following steps: adding 1 g of boron nitride nanosheets and 1 g of nickel acetate to isopropanol, ultrasonically dispersing for 6 h, magnetically stirring for 12 h, and rotary evaporating at 60° C. to obtain a nickel salt-boron nitride nanosheet precursor; placing the nickel salt-boron nitride nanosheet precursor in a fluidized bed reactor for reduction and carbon nanotube growth, and cooling to room temperature to obtain a carbon nanotube-boron nitride nanosheet composite material; The reduction process parameters include: temperature of 500° C., gas flow of argon-hydrogen mixed gas, argon flow rate of 300 sccm, hydrogen flow rate of 30 sscm, and reaction time of 10 min.

[0020] The parameters of the carbon nanotube growth process include: temperature of 660° C., gas flow of ethylene, ethylene flow rate of 30 sscm, and reaction time of 5 min.

[0021] The preparation method of composite polymer particles comprises the following steps: adding 0.5g of aluminum oxide particles and 1.0g of multi-walled carbon nanotubes into 98.5g of polystyrene, heating to 190°C for melt blending, grinding and screening the mixed product to obtain composite polymer particles.

[0022] Example 1: A spraying process of heat dissipation insulating paint based on batteries: S1: Add 10g of epoxy resin to 80°C deionized water, add 0.006g of sodium dodecyl sulfate, stir evenly, add 0.5g of composite polymer particles, stir evenly, heat to 120°C and reflux for 24h, add 5g of polyetheramine curing agent and 1g of carbon nanotube-boron nitride nanosheet composite material, keep warm and stir for 2h, centrifuge, wash the product, freeze-dry, and obtain composite microspheres; S2: 0.1 g of the composite microspheres were added to an ethanol-water solution with a volume ratio of 10:1, ultrasonically dispersed, 9 g of ammonium hydroxide and 0.015 g of hexadecyltrimethylammonium bromide were added, ultrasonically dispersed, 5 g of ethyl orthosilicate and 5 g of 3-methacryloxypropyltrimethoxysilane were added, and the hydrolysis and condensation reaction was carried out for 8 h, centrifuged, and the product was alternately washed with ethanol and deionized water, and vacuum dried at 60° C. to obtain insulating treated composite microspheres; S3: 10 g of insulating treated composite microspheres were added to deionized water, ultrasonically dispersed, 1 g of methanol and 1 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane were added, and the pH of the reaction system was adjusted to 3.0 with acetic acid. The reaction was heated to 55 °C for 6 h, filtered, the product was washed with deionized water, and freeze-dried to obtain epoxy functionalized composite microspheres; S4: 10 g of 4,4'-methylenebis(N,N-diglycidylaniline) and 1.5 g of epoxy functionalized composite microspheres were mixed evenly, 6 g of 4,4'-sulfonyl dianiline was added, the mixture was heated to 150°C, stirred evenly, and vacuum degassed to obtain a heat dissipation insulating paint based on a battery; S5: The electrostatic spraying process is adopted. The electrostatic spraying process parameters include: atomizing air pressure: 0.3MPa, gun speed: 0.8m / s, ambient humidity: ≤60%RH, spraying thickness: 100μm, curing temperature: 180℃, and curing time: 3h.

[0023] Example 2: A spraying process of heat dissipation insulating paint based on a battery: S1: Add 10g of epoxy resin to 80°C deionized water, add 0.006g of sodium dodecyl sulfate, stir evenly, add 1g of composite polymer particles, stir evenly, heat to 120°C and reflux for 24h, add 5g of polyetheramine curing agent and 1g of carbon nanotube-boron nitride nanosheet composite material, keep warm and stir for 2h, centrifuge, wash the product, freeze-dry, and obtain composite microspheres; S2: 0.1 g of the composite microspheres were added to an ethanol-water solution with a volume ratio of 10:1, ultrasonically dispersed, 9 g of ammonium hydroxide and 0.015 g of hexadecyltrimethylammonium bromide were added, ultrasonically dispersed, 5 g of ethyl orthosilicate and 5 g of 3-methacryloxypropyltrimethoxysilane were added, and the hydrolysis and condensation reaction was carried out for 8 h, centrifuged, and the product was alternately washed with ethanol and deionized water, and vacuum dried at 60° C. to obtain insulating treated composite microspheres; S3: 10 g of insulating treated composite microspheres were added to deionized water, ultrasonically dispersed, 1 g of methanol and 1 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane were added, and the pH of the reaction system was adjusted to 3.0 with acetic acid. The reaction was heated to 55 °C for 6 h, filtered, the product was washed with deionized water, and freeze-dried to obtain epoxy functionalized composite microspheres; S4: 10 g of 4,4'-methylenebis(N,N-diglycidylaniline) and 1.5 g of epoxy functionalized composite microspheres were mixed evenly, 6 g of 4,4'-sulfonyl dianiline was added, the mixture was heated to 150°C, stirred evenly, and vacuum degassed to obtain a heat dissipation insulating paint based on a battery; S5: The electrostatic spraying process is adopted. The electrostatic spraying process parameters include: atomizing air pressure: 0.3MPa, gun speed: 0.8m / s, ambient humidity: ≤60%RH, spraying thickness: 100μm, curing temperature: 180℃, and curing time: 3h.

[0024] Example 3: A spraying process of heat dissipation insulating paint based on batteries: S1: add 10g epoxy resin to 80°C deionized water, add 0.006g sodium dodecyl sulfate, stir evenly, add 1g composite polymer particles, stir evenly, heat to 120°C and reflux for 24h, add 5g polyetheramine curing agent, 2g carbon nanotube-boron nitride nanosheet composite material, keep warm and stir for 2h, centrifuge, wash the product, freeze-dry, and obtain composite microspheres; S2: 0.1 g of the composite microspheres were added to an ethanol-water solution with a volume ratio of 10:1, ultrasonically dispersed, 9 g of ammonium hydroxide and 0.015 g of hexadecyltrimethylammonium bromide were added, ultrasonically dispersed, 5 g of ethyl orthosilicate and 5 g of 3-methacryloxypropyltrimethoxysilane were added, and the hydrolysis and condensation reaction was carried out for 8 h, centrifuged, and the product was alternately washed with ethanol and deionized water, and vacuum dried at 60° C. to obtain insulating treated composite microspheres; S3: 10 g of insulating treated composite microspheres were added to deionized water, ultrasonically dispersed, 1 g of methanol and 1 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane were added, and the pH of the reaction system was adjusted to 3.0 with acetic acid. The reaction was heated to 55 °C for 6 h, filtered, the product was washed with deionized water, and freeze-dried to obtain epoxy functionalized composite microspheres; S4: 10 g of 4,4'-methylenebis(N,N-diglycidylaniline) and 1.5 g of epoxy functionalized composite microspheres were mixed evenly, 6 g of 4,4'-sulfonyl dianiline was added, the mixture was heated to 150°C, stirred evenly, and vacuum degassed to obtain a heat dissipation insulating paint based on a battery; S5: The electrostatic spraying process is adopted. The electrostatic spraying process parameters include: atomizing air pressure: 0.3MPa, gun speed: 0.8m / s, ambient humidity: ≤60%RH, spraying thickness: 100μm, curing temperature: 180℃, and curing time: 3h.

[0025] Example 4: A spraying process of heat dissipation insulating paint based on a battery: S1: Add 10g of epoxy resin to 80°C deionized water, add 0.006g of sodium dodecyl sulfate, stir evenly, add 1g of composite polymer particles, stir evenly, heat to 120°C and reflux for 24h, add 5g of polyetheramine curing agent and 2g of carbon nanotube-boron nitride nanosheet composite material, keep warm and stir for 2h, centrifuge, wash the product, freeze-dry, and obtain composite microspheres; S2: 0.1 g of the composite microspheres were added to an ethanol-water solution with a volume ratio of 10:1, ultrasonically dispersed, 9 g of ammonium hydroxide and 0.015 g of hexadecyltrimethylammonium bromide were added, ultrasonically dispersed, 5 g of ethyl orthosilicate and 5 g of 3-methacryloxypropyltrimethoxysilane were added, and the hydrolysis and condensation reaction was carried out for 8 h, centrifuged, and the product was alternately washed with ethanol and deionized water, and vacuum dried at 60° C. to obtain insulating treated composite microspheres; S3: 10 g of insulating treated composite microspheres were added to deionized water, ultrasonically dispersed, 1 g of methanol and 1 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane were added, and the pH of the reaction system was adjusted to 3.0 with acetic acid. The reaction was heated to 55 °C for 6 h, filtered, the product was washed with deionized water, and freeze-dried to obtain epoxy functionalized composite microspheres; S4: 10 g of 4,4'-methylenebis(N,N-diglycidylaniline) and 3 g of epoxy functionalized composite microspheres were mixed evenly, 6 g of 4,4'-sulfonyl dianiline was added, the mixture was heated to 150°C, stirred evenly, and vacuum degassed to obtain a heat dissipation insulating paint based on a battery; S5: The electrostatic spraying process is adopted. The electrostatic spraying process parameters include: atomizing air pressure: 0.3MPa, gun speed: 0.8m / s, ambient humidity: ≤60%RH, spraying thickness: 100μm, curing temperature: 180℃, and curing time: 3h.

[0026] Comparative Example 1: A spraying process of heat dissipation insulating paint based on a battery: S1: Add 10g of epoxy resin into 80°C deionized water, add 0.006g of sodium dodecyl sulfate, stir evenly, heat to 120°C and reflux for 24h, add 5g of polyetheramine curing agent and 1g of carbon nanotube-boron nitride nanosheet composite material, keep warm and stir for 2h, centrifuge, wash the product, freeze-dry, and obtain composite microspheres; S2: 0.1 g of the composite microspheres were added to an ethanol-water solution with a volume ratio of 10:1, ultrasonically dispersed, 9 g of ammonium hydroxide and 0.015 g of hexadecyltrimethylammonium bromide were added, ultrasonically dispersed, 5 g of ethyl orthosilicate and 5 g of 3-methacryloxypropyltrimethoxysilane were added, and the hydrolysis and condensation reaction was carried out for 8 h, centrifuged, and the product was alternately washed with ethanol and deionized water, and vacuum dried at 60° C. to obtain insulating treated composite microspheres; S3: 10 g of insulating treated composite microspheres were added to deionized water, ultrasonically dispersed, 1 g of methanol and 1 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane were added, and the pH of the reaction system was adjusted to 3.0 with acetic acid. The reaction was heated to 55 °C for 6 h, filtered, the product was washed with deionized water, and freeze-dried to obtain epoxy functionalized composite microspheres; S4: 10 g of 4,4'-methylenebis(N,N-diglycidylaniline) and 1.5 g of epoxy functionalized composite microspheres were mixed evenly, 6 g of 4,4'-sulfonyl dianiline was added, the mixture was heated to 150°C, stirred evenly, and vacuum degassed to obtain a heat dissipation insulating paint based on a battery; S5: The electrostatic spraying process is adopted. The electrostatic spraying process parameters include: atomizing air pressure: 0.3MPa, gun speed: 0.8m / s, ambient humidity: ≤60%RH, spraying thickness: 100μm, curing temperature: 180℃, and curing time: 3h.

[0027] Comparative Example 2: A spraying process of heat dissipation insulating paint based on batteries: S1: Add 10g of epoxy resin to 80°C deionized water, add 0.006g of sodium dodecyl sulfate, stir evenly, add 0.5g of composite polymer particles, stir evenly, heat to 120°C and reflux for 24h, add 5g of polyetheramine curing agent and 1g of boron nitride nanosheet composite material, keep warm and stir for 2h, centrifuge, wash the product, freeze-dry, and obtain composite microspheres; S2: 0.1 g of the composite microspheres were added to an ethanol-water solution with a volume ratio of 10:1, ultrasonically dispersed, 9 g of ammonium hydroxide and 0.015 g of hexadecyltrimethylammonium bromide were added, ultrasonically dispersed, 5 g of ethyl orthosilicate and 5 g of 3-methacryloxypropyltrimethoxysilane were added, and the hydrolysis and condensation reaction was carried out for 8 h, centrifuged, and the product was alternately washed with ethanol and deionized water, and vacuum dried at 60° C. to obtain insulating treated composite microspheres; S3: 10 g of insulating treated composite microspheres were added to deionized water, ultrasonically dispersed, 1 g of methanol and 1 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane were added, and the pH of the reaction system was adjusted to 3.0 with acetic acid. The reaction was heated to 55 °C for 6 h, filtered, the product was washed with deionized water, and freeze-dried to obtain epoxy functionalized composite microspheres; S4: 10 g of 4,4'-methylenebis(N,N-diglycidylaniline) and 1.5 g of epoxy functionalized composite microspheres were mixed evenly, 6 g of 4,4'-sulfonyl dianiline was added, the mixture was heated to 150°C, stirred evenly, and vacuum degassed to obtain a heat dissipation insulating paint based on a battery; S5: The electrostatic spraying process is adopted. The electrostatic spraying process parameters include: atomizing air pressure: 0.3MPa, gun speed: 0.8m / s, ambient humidity: ≤60%RH, spraying thickness: 100μm, curing temperature: 180℃, and curing time: 3h.

[0028] Comparative Example 3: A spraying process of heat dissipation insulating paint based on batteries: S1: Add 10g of epoxy resin to 80°C deionized water, add 0.006g of sodium dodecyl sulfate, stir evenly, add 0.5g of composite polymer particles, stir evenly, heat to 120°C and reflux for 24h, add 5g of polyetheramine curing agent and 1g of carbon nanotube-boron nitride nanosheet composite material, keep warm and stir for 2h, centrifuge, wash the product, freeze-dry, and obtain composite microspheres; S2: 10 g of composite microspheres were added to deionized water, ultrasonically dispersed, 1 g of methanol and 1 g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane were added, and the pH of the reaction system was adjusted to 3.0 with acetic acid. The reaction was heated to 55 °C for 6 h, filtered, the product was washed with deionized water, and freeze-dried to obtain epoxy functionalized composite microspheres; S3: 10 g of 4,4'-methylenebis(N,N-diglycidylaniline) and 1.5 g of epoxy functionalized composite microspheres were mixed evenly, 6 g of 4,4'-sulfonyl dianiline was added, the mixture was heated to 150°C, stirred evenly, and vacuum degassed to obtain a heat dissipation insulating paint based on a battery; S4: The electrostatic spraying process is adopted. The electrostatic spraying process parameters include: atomizing air pressure: 0.3MPa, gun speed: 0.8m / s, ambient humidity: ≤60%RH, spraying thickness: 100μm, curing temperature: 180℃, and curing time: 3h.

[0029] Comparative Example 4: A spraying process of heat dissipation insulating paint based on a battery: S1: Add 10g of epoxy resin to 80°C deionized water, add 0.006g of sodium dodecyl sulfate, stir evenly, add 0.5g of composite polymer particles, stir evenly, heat to 120°C and reflux for 24h, add 5g of polyetheramine curing agent and 1g of carbon nanotube-boron nitride nanosheet composite material, keep warm and stir for 2h, centrifuge, wash the product, freeze-dry, and obtain composite microspheres; S2: 0.1 g of the composite microspheres were added to an ethanol-water solution with a volume ratio of 10:1, ultrasonically dispersed, 9 g of ammonium hydroxide and 0.015 g of hexadecyltrimethylammonium bromide were added, ultrasonically dispersed, 5 g of ethyl orthosilicate and 5 g of 3-methacryloxypropyltrimethoxysilane were added, and the hydrolysis and condensation reaction was carried out for 8 h, centrifuged, and the product was alternately washed with ethanol and deionized water, and vacuum dried at 60° C. to obtain insulating treated composite microspheres; S3: 10 g of 4,4'-methylenebis(N,N-diglycidylaniline) and 1.5 g of insulating treated composite microspheres were mixed evenly, 6 g of 4,4'-sulfonyl dianiline was added, the mixture was heated to 150°C, stirred evenly, and vacuum degassed to obtain a heat dissipating insulating paint based on a battery; S4: The electrostatic spraying process is adopted. The electrostatic spraying process parameters include: atomizing air pressure: 0.3MPa, gun speed: 0.8m / s, ambient humidity: ≤60%RH, spraying thickness: 100μm, curing temperature: 180℃, and curing time: 3h.

[0030] Experiment: Dielectric performance test: According to ASTM D257 standard, use a high resistivity meter to measure the resistivity value of heat dissipation insulation paint Thermal conductivity test: Use a thermal conductivity meter to measure the thermal conductivity of heat dissipation insulation paint.

[0031] According to λ=α×ρ×C p ; Among them, λ (W / mK) thermal conductivity, α (mm 2 / s) thermal diffusivity, ρ (g / cm 3 ) density, C p (J / g / K) specific heat capacity.

[0032] The experimental results are shown in Table 1 below.

[0033] Table 1 Test data of heat dissipation insulation paint performance based on battery

[0034] Conclusion: The heat dissipation insulating paint prepared by the present invention has excellent thermal conductivity and insulation performance.

[0035] Comparative Example 1 does not contain composite polymer particles, resulting in reduced thermal conductivity performance; Comparative Example 2 uses ordinary boron nitride nanosheets, resulting in reduced thermal conductivity performance; Comparative Example 3 does not perform insulation treatment, resulting in reduced insulation performance; Comparative Example 4 does not perform epoxy functionalization treatment, resulting in reduced thermal conductivity performance.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A battery-based heat dissipation insulating paint, characterized in that: The battery-based heat dissipation insulating paint is prepared from the following components, including 4,4'-methylenebis(N,N-diglycidylaniline), 4,4'-sulfonyl dianiline, and epoxy-functionalized composite microspheres; The epoxy functionalized composite microspheres are prepared from insulating treated composite microspheres and gamma-(2,3-epoxypropoxy)propyltrimethoxysilane.

2. The battery-based heat dissipation insulating paint according to claim 1, characterized in that: The preparation method of the heat dissipation insulating paint based on the battery comprises the following steps: 4,4'-methylenebis(N,N-diglycidylaniline) and epoxy functionalized composite microspheres are mixed evenly, 4,4'-sulfonyl dianiline is added, heated to 150-155° C., stirred evenly, and vacuum degassed to obtain the heat dissipation insulating paint based on the battery; In the preparation process of the battery-based heat dissipation insulating paint, the mass ratio of 4,4'-methylenebis(N,N-diglycidylaniline):4,4'-sulfonyldianiline:epoxy functionalized composite microspheres is 1:0.6:(0.15-0.3).

3. The battery-based heat dissipation insulating paint according to claim 1, characterized in that: The preparation method of epoxy functionalized composite microspheres comprises the following steps: adding the insulating treated composite microspheres into deionized water, ultrasonically dispersing, adding methanol and γ-(2,3-epoxypropoxy)propyltrimethoxysilane, adjusting the pH of the reaction system to 3.0 with acetic acid, heating to 55-57° C. for reaction for 6-6.5 hours, filtering, washing the product with deionized water, and freeze drying to obtain epoxy functionalized composite microspheres; During the preparation of epoxy functionalized composite microspheres, the mass ratio of the insulating treated composite microspheres to γ-(2,3-epoxypropoxy)propyltrimethoxysilane was 10:(1-1.5).

4. The battery-based heat dissipation insulating paint according to claim 3, characterized in that: The preparation method of the insulating composite microspheres comprises the following steps: adding the composite microspheres to an ethanol aqueous solution with a volume ratio of 10:1, ultrasonically dispersing, adding ammonium hydroxide and hexadecyltrimethylammonium bromide, ultrasonically dispersing, adding tetraethyl orthosilicate and 3-methacryloxypropyltrimethoxysilane, hydrolyzing and condensing for 8-9 hours, centrifuging, washing the product alternately with ethanol and deionized water, and vacuum drying at 60-65° C. to obtain the insulating composite microspheres; The proportions of various components in the preparation process of insulating treated composite microspheres are calculated by mass, including: 0.1-0.15 parts of composite microspheres, 9-10 parts of ammonium hydroxide, 0.015-0.02 parts of hexadecyltrimethylammonium bromide, 5-6 parts of tetraethyl orthosilicate, and 5-6 parts of 3-methacryloxypropyltrimethoxysilane; wherein the mass ratio of tetraethyl orthosilicate to 3-methacryloxypropyltrimethoxysilane is 1:

1.

5. The battery-based heat dissipation insulating paint according to claim 4, characterized in that: The preparation method of the composite microspheres comprises the following steps: adding epoxy resin to deionized water at 80-85°C, adding sodium dodecyl sulfate, stirring evenly, adding composite polymer particles, stirring evenly, heating to 120-125°C for reflux reaction for 24 hours, adding polyetheramine curing agent and carbon nanotube-boron nitride nanosheet composite material, keeping warm and stirring for 2-3 hours, centrifuging, washing the product, and freeze-drying to obtain composite microspheres; The proportions of various components in the preparation process of the composite microspheres are calculated by mass and include: 8-10 parts of epoxy resin, 0.005-0.006 parts of sodium dodecyl sulfate, 0.5-1 parts of composite polymer particles, 5-6 parts of polyetheramine curing agent, and 1-2 parts of carbon nanotube-boron nitride nanosheet composite material.

6. The battery-based heat dissipation insulating paint according to claim 5, characterized in that: The preparation method of the composite polymer particles comprises the following steps: adding alumina particles and multi-walled carbon nanotubes to polystyrene, heating to 190-195° C. for melt blending, grinding and screening the mixed product to obtain composite polymer particles; In the preparation process of the composite polymer particles, the proportions of the components are calculated by weight, including: 0.5-0.8wt% of aluminum oxide particles, 0.5-1.0wt% of multi-walled carbon nanotubes, and the rest is polystyrene.

7. The battery-based heat dissipation insulating paint according to claim 5, characterized in that: The preparation method of the carbon nanotube-boron nitride nanosheet composite material comprises the following steps: adding boron nitride nanosheets and nickel acetate into isopropanol, ultrasonically dispersing for 6-7 hours, magnetically stirring for 12-13 hours, and rotary evaporating at 60-65° C. to obtain a nickel salt-boron nitride nanosheet precursor; placing the nickel salt-boron nitride nanosheet precursor in a fluidized bed reactor for reduction and carbon nanotube growth, and cooling to room temperature to obtain a carbon nanotube-boron nitride nanosheet composite material; The boron nitride nanosheet is prepared by a supercritical carbon dioxide stripping method.

8. The battery-based heat dissipation insulating paint according to claim 7, characterized in that: The reduction process parameters include: temperature of 500-505° C., gas flow of argon-hydrogen mixed gas, argon flow rate of 300-305 sccm, hydrogen flow rate of 30-31 sscm, and reaction time of 10-10.5 min.

9. The battery-based heat dissipation insulating paint according to claim 7, characterized in that: The carbon nanotube growth process parameters include: temperature of 660-665° C., gas flow of ethylene, ethylene flow rate of 30-30.5 sscm, and reaction time of 5-15 min.

10. A spraying process of heat dissipation insulating paint based on battery according to any one of claims 1 to 9, characterized in that: The spraying process is an electrostatic spraying process, and the electrostatic spraying process parameters include: atomization pressure: 0.3-0.5MPa, gun speed: 0.5-1.2m / s, ambient humidity: ≤60%RH, spraying thickness: 50-200μm, curing temperature: 180-185°C, and curing time 3-3.5h.

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