CN105131728A - Air permeability heat-dissipating coating material and preparation method thereof - Google Patents

Abstract

The present invention discloses an air permeability heat-dissipating coating material, which comprises the following raw materials by weight: 2-3 parts of hollow glass micro-beads, 12-15 parts of a styrene-maleic anhydride copolymer, 6-10 parts of propargyl alcohol, 90-100 parts of tetrahydrofuran, 4-7 parts of graphene, 16-20 parts of nanometer silica, 0.2-0.3 part of a silane coupling agent KH560, 700-800 parts of dimethylformamide, 4-5 parts of sodium nitride, 0.04-0.05 part of aluminum trichloride, 1.6-2 parts of a 2-3% sodium ascorbate solution, 1.8-2 parts of a 2-3% copper sulfate solution, 120-130 parts of high-density polyethylene, 0.6-1 part of citric acid, 4-5 parts of dibutyl maleate, 0.7-1 part of zinc methacrylate, 2-3 parts of N-ethyl-o/p-toluenesulfonamide, and 1-2 parts of calcium chloride. The coating material of the present invention has characteristics of micro pores, good thermal conductivity, good air permeability, substrate surface temperature reducing, and good protection effect.

Description

A kind of ventilation property heat radiation coating and preparation method thereof

Technical field

The present invention relates to heat radiation coating technical field, particularly relate to a kind of ventilation property heat radiation coating and preparation method thereof.

Background technology

Along with the fast development of modern science and technology, intensive and the miniaturization of the high frequency of electron device, high speed and unicircuit, the overall power density of unit volume electron device and thermal value are increased by a wide margin, thus makes the cooling problem of electron device become more and more outstanding.And the cooling power that the cooling system of routine can reach is subject to great challenge, especially in fields such as the energy, automobile, air-conditioning, agricultural, chemical industry, heating, aerospace, microelectronics, information, the technology such as enhancement of heat transfer, raising radiating efficiency are had higher requirement.And heat radiation coating is a kind of body surface radiating efficiency that improves, reduce the speciality coating of system temperature, heat radiation coating is coated with the radiating efficiency that can improve electron device on the electronic devices;

Nano silicon is because having in tridimensional network, and stability, reinforcing and thickening property is superior, low price, the feature such as easily to produce, is widely used in corrosion protection coating, to improve carrying and the antiseptic power of coating.The specific surface area of nano silicon is large, and specific surface energy is high, and easily occur in the coating reunite and form offspring, cause the performance of activeness and quietness to reduce, the hydroxyl on its surface also enhances this kind of phenomenon simultaneously.Therefore, improving the dispersiveness of nanosized SiO_2 in organic coating is problem demanding prompt solution.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of ventilation property heat radiation coating and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of ventilation property heat radiation coating, it is made up of the raw material of following weight parts:

Hollow glass micropearl 2-3, styrene-maleic anhydride copolymer 12-15, propiolic alcohol 6-10, tetrahydrofuran (THF) 90-100, Graphene 4-7, nano silicon 16-20, silane coupling agent KH5600.2-0.3, dimethyl formamide 700-800, sodium nitride 4-5, aluminum chloride 0.04-0.05, 2-3% sodium ascorbate solution 1.6-2, 2-3% copper-bath 1.8-2, high density polyethylene(HDPE) 120-130, citric acid 0.6-1, dibutyl maleinate 4-5, zinc methacrylate 0.7-1, N-ethyl-neighbour, para toluene sulfonamide 2-3, calcium chloride 1-2.

A preparation method for described ventilation property heat radiation coating, comprises the following steps:

(1) above-mentioned calcium chloride is joined in 7-10 times of deionized water, stir, add N-ethyl-neighbour, para toluene sulfonamide, insulated and stirred 10-20 minute at 60-70 DEG C, dehydration after cooling, add the Virahol of system weight 40-50%, stir, add dibutyl maleinate, send in the water-bath of 80-90 DEG C, insulated and stirred 20-30 minute, obtains modification Preblend;

(2) by styrene-maleic anhydride copolymer, propiolic alcohol, tetrahydrofuran (THF) mixing, insulated and stirred 10-16 hour at 50-60 DEG C, underpressure distillation, removing liquid, vacuum-drying, obtains alkynyl multipolymer;

(3) by Graphene, nano silicon, hollow glass micropearl mixing, ball milling 30-40 minute;

(4) get above-mentioned ball milling particle, join in 20-30 toluene doubly, ultrasonic disperse 2-3 hour, adds silane coupling agent KH560, and raised temperature is 86-90 DEG C, insulated and stirred 10-12 hour, cooling, suction filtration, and vacuum-drying, obtains silanization nanoparticle;

(5) get the 46-50% of above-mentioned dimethyl formamide weight, add silanization nanoparticle, ultrasonic disperse 2-3 hour, add sodium nitride, aluminum chloride, stir 24-25 hour, suction filtration at 30-35 DEG C, washing, vacuum-drying, obtains Sodium Azide rice corpuscles;

(6) by above-mentioned zinc methacrylate, citric acid mixing, join in 4-6 times of deionized water, stir, obtain premixed liquid;

(7) by above-mentioned Sodium Azide rice corpuscles, the mixing of alkynyl multipolymer, join in remaining dimethyl formamide, nitrogen bubble 30-40 minute, adds 2-3% sodium ascorbate solution, 2-3% copper-bath successively, reacts 20-24 hour at being placed in 76-80 DEG C, add modification Preblend, premixed liquid, 60-100 rev/min is stirred 30-40 minute, and suction filtration, respectively washs 2-3 time with distilled water, dimethyl formamide, acetone successively by filter cake, after vacuum-drying, obtain engrafted nanometer particle;

(8) mixed with each raw material of residue by above-mentioned engrafted nanometer particle, stir, be sent to twin screw extruder, melt extrude, cooling, pulverizes and sieves, to obtain final product.

Advantage of the present invention is:

(1) coating of the present invention has good shock resistance:

Graphene, nano silicon all have larger specific surface area, can strengthen Graphene, reactive force between nano silicon and polyvinyl resin, put forward heavily stressed transfer efficiency, and then improve its shock resistance;

(2) coating of the present invention has good erosion resistance;

Graphene, nano silicon in the medium-altitude dispersion of resin, can form fine and close film, corrosive medium is more difficult to be penetrated in coating by this interface, well improves corrosion resistance;

(3) coating of the present invention has good heat conduction and heat radiation:

First the present invention prepares the styrene-maleic anhydride copolymer containing multiple alkynyl on molecular chain, then modified Nano particle, its surface is made to introduce multiple azido-, finally utilize " click " chemical method at particle surface graftomer, polymer molecular chain has multiple point to be grafted to particle surface, molecular chain " is crouched down " at particle surface, thus it is coated what do not need to realize under the condition introducing number of polymers chain to particle, obtain grafting density high, the nanoparticle of good dispersity, strengthen its dispersiveness in resin matrix, the two-dimension plane structure of Graphene that is scattered here and there in resin and the tridimensional network of nano silicon can form stable heat conduction network, greatly improve the transmission of heat, play good heat conduction and heat radiation effect.

Coating of the present invention also has micropore, thermal conductivity, good permeability, can well reduce the temperature of substrate surface, plays better protected effect.

Embodiment

A kind of ventilation property heat radiation coating, it is made up of the raw material of following weight parts:

Hollow glass micropearl 2, Zelan 338 12, propiolic alcohol 6, tetrahydrofuran (THF) 90, Graphene 4, nano silicon 16, silane coupling agent KH5600.2, dimethyl formamide 700, sodium nitride 4, aluminum chloride 0.04,2% sodium ascorbate solution 1.6,2% copper-bath 1.8, high density polyethylene(HDPE) 120, citric acid 0.6, dibutyl maleinate 4, zinc methacrylate 0.7, N ethyl neighbour, para toluene sulfonamide 2, calcium chloride 1.

A preparation method for described ventilation property heat radiation coating, comprises the following steps:

(1) above-mentioned calcium chloride is joined in 7 times of deionized waters, stir, add N ethyl neighbour, para toluene sulfonamide, insulated and stirred 10 minutes at 60 DEG C, dehydration after cooling, add the Virahol of system weight 40%, stir, add dibutyl maleinate, send in the water-bath of 80 DEG C, insulated and stirred 20 minutes, obtains modification Preblend;

(2) by Zelan 338, propiolic alcohol, tetrahydrofuran (THF) mixing, insulated and stirred 10 hours at 50 DEG C, underpressure distillation, removing liquid, vacuum-drying, obtains alkynyl multipolymer;

(3) by Graphene, nano silicon, hollow glass micropearl mixing, ball milling 30 minutes;

(4) get above-mentioned ball milling particle, join in the toluene of 20 times, ultrasonic disperse 2 hours, adds silane coupling agent KH560, and raised temperature is 86 DEG C, insulated and stirred 10 hours, cooling, suction filtration, and vacuum-drying, obtains silanization nanoparticle;

(5) get 46% of above-mentioned dimethyl formamide weight, add silanization nanoparticle, ultrasonic disperse 2 hours, adds sodium nitride, aluminum chloride, stirs 24 hours, suction filtration at 30 DEG C, washing, and vacuum-drying, obtains Sodium Azide rice corpuscles;

(6) by above-mentioned zinc methacrylate, citric acid mixing, join in 4 times of deionized waters, stir, obtain premixed liquid;

(7) by above-mentioned Sodium Azide rice corpuscles, the mixing of alkynyl multipolymer, join in remaining dimethyl formamide, nitrogen bubble 30 minutes, adds 2% sodium ascorbate solution, 2% copper-bath successively, reacts 20 hours at being placed in 76 DEG C, add modification Preblend, premixed liquid, 60 revs/min are stirred 30 minutes, and suction filtration, respectively washs 2 times with distilled water, dimethyl formamide, acetone successively by filter cake, after vacuum-drying, obtain engrafted nanometer particle;

(8) mixed with each raw material of residue by above-mentioned engrafted nanometer particle, stir, be sent to twin screw extruder, melt extrude, cooling, pulverizes and sieves, to obtain final product.

Performance test:

Appearance of film: flat smooth, without shrinkage cavity, free of pinholes;

Just recoiling test: pass through;

Pencil hardness test: 2H is without scuffing;

Sticking power and resistance to Neutral Salt Spray Corrosion grade are 2 grades;

Thermal conductivity is 0.489W/mK.

Claims (2)

1. a ventilation property heat radiation coating, is characterized in that what it was made up of the raw material of following weight parts:

Hollow glass micropearl 2-3, styrene-maleic anhydride copolymer 12-15, propiolic alcohol 6-10, tetrahydrofuran (THF) 90-100, Graphene 4-7, nano silicon 16-20, silane coupling agent KH5600.2-0.3, dimethyl formamide 700-800, sodium nitride 4-5, aluminum chloride 0.04-0.05, 2-3% sodium ascorbate solution 1.6-2, 2-3% copper-bath 1.8-2, high density polyethylene(HDPE) 120-130, citric acid 0.6-1, dibutyl maleinate 4-5, zinc methacrylate 0.7-1, N-ethyl-neighbour, para toluene sulfonamide 2-3, calcium chloride 1-2.

2. a preparation method for ventilation property heat radiation coating as claimed in claim 1, is characterized in that comprising the following steps:

(1) above-mentioned calcium chloride is joined in 7-10 times of deionized water, stir, add N-ethyl-neighbour, para toluene sulfonamide, insulated and stirred 10-20 minute at 60-70 DEG C, dehydration after cooling, add the Virahol of system weight 40-50%, stir, add dibutyl maleinate, send in the water-bath of 80-90 DEG C, insulated and stirred 20-30 minute, obtains modification Preblend;

(2) by styrene-maleic anhydride copolymer, propiolic alcohol, tetrahydrofuran (THF) mixing, insulated and stirred 10-16 hour at 50-60 DEG C, underpressure distillation, removing liquid, vacuum-drying, obtains alkynyl multipolymer;

(3) by Graphene, nano silicon, hollow glass micropearl mixing, ball milling 30-40 minute;

(4) get above-mentioned ball milling particle, join in 20-30 toluene doubly, ultrasonic disperse 2-3 hour, adds silane coupling agent KH560, and raised temperature is 86-90 DEG C, insulated and stirred 10-12 hour, cooling, suction filtration, and vacuum-drying, obtains silanization nanoparticle;

(5) get the 46-50% of above-mentioned dimethyl formamide weight, add silanization nanoparticle, ultrasonic disperse 2-3 hour, add sodium nitride, aluminum chloride, stir 24-25 hour, suction filtration at 30-35 DEG C, washing, vacuum-drying, obtains Sodium Azide rice corpuscles;

(6) by above-mentioned zinc methacrylate, citric acid mixing, join in 4-6 times of deionized water, stir, obtain premixed liquid;

(7) by above-mentioned Sodium Azide rice corpuscles, the mixing of alkynyl multipolymer, join in remaining dimethyl formamide, nitrogen bubble 30-40 minute, adds 2-3% sodium ascorbate solution, 2-3% copper-bath successively, reacts 20-24 hour at being placed in 76-80 DEG C, add modification Preblend, premixed liquid, 60-100 rev/min is stirred 30-40 minute, and suction filtration, respectively washs 2-3 time with distilled water, dimethyl formamide, acetone successively by filter cake, after vacuum-drying, obtain engrafted nanometer particle;

(8) mixed with each raw material of residue by above-mentioned engrafted nanometer particle, stir, be sent to twin screw extruder, melt extrude, cooling, pulverizes and sieves, to obtain final product.