CN105585788B - A kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure - Google Patents
A kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure Download PDFInfo
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Abstract
The invention discloses a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure, including cellular heat radiator body, the honeycomb hole of cellular heat radiator body is vertically arranged for above-below direction, and the thermoplasticity heat-conduction electric insulation composite material is mixed by following components by weight：50 70 parts of thermoplastic resin, modified 15 25 parts of bamboo fibre, 8 15 parts of high heat conduction agent, 3 10 parts of dielectric material, 0.5 1 parts of coupling agent, 0.4 0.6 parts of crosslinking agent, 0.5 1.5 parts of lubricant, 0.3 0.8 parts of antioxidant.The present invention has that high-termal conductivity, excellent in mechanical performance, high electrical insulating properties, production cost are low, material more environmentally friendly the advantages that being easy to degraded, can be applied to the product such as LED radiator and heat radiation of electrical apparatus device.
Description
Technical field
The present invention relates to heat sink material technical field, more particularly to a kind of reticulated thermoplastic's heat-conduction electric insulation composite material
Radiator structure.
Background technology
Thermoplastic is a kind of most widely used plastics, with thermoplastic resin main component, and add various auxiliary agents and
It is configured to plastics.In a certain temperature conditions, plastics can be softened or melted into arbitrary shape, shape invariance after cooling；It is this
State can repeatedly have plasticity, and a kind of this simply physical change repeatedly, the species master of thermoplastic repeatedly and all the time
There are general-purpose plastics such as polyethylene, polypropylene, polyvinyl chloride, polystyrene etc., and engineering plastics such as makrolon, polyamides
Amine, polyester, polyphenylene sulfide etc..But this kind of product is all using non-renewable resources oil as raw material, and production process energy consumption is big, to ring
Border influences more serious.Meanwhile production cost is higher, it is not easy to decompose in soil environment, easily causes " white pollution ".Cause
This, the substitute for studying such product is very urgent.
High polymer material electrical insulation capability is excellent, but thermal conductivity factor is very low, generally 0.2W/m.K, is metal material
1 percent arrive one thousandth, and the application scenario that should have high heat conduction for some while have insulating properties requirement again is compared at present
Conventional method is inorganic filler of the addition with high thermal conductivity coefficient and high impedance in polymer-based material.But use this side
Material prepared by method, because a large amount of additions of heat filling make the mechanical property of composite receive serious infringement, simultaneously
The raising of heat conductivility is not also notable, is typically hardly higher than 2W/m.K.Need to utilize for LED radiator, heat radiation of electrical apparatus device etc.
The situation of radiator area flash heat transfer, if the thermal conductivity factor of material is small, its heat transfer in the longitudinal direction is just very
Difficulty, heat, which is all concentrated in the region of very little, to spread, and caused the effective area of radiator not make full use of, be have impact on
Radiating efficiency.
China's bamboo resource very abundant, produces bamboo-plastic combined product, on the one hand can part substituted for plastic product, improve product
Low-carbon, environmental-protecting performance, on the other hand can reduce cost again, promote the efficient utilization of China's bamboo resource, drive bamboo area economy.But
The compound of bamboo raw material and plastics is still faced with many technical barriers and solved, and if bamboo wood is highly polar, hydrophily is strong, and
Plastics are that nonpolar, hydrophobicity is strong, cause the poor compatibility between bamboo wood material and plastics, and interfacial combined function is poor.Conventional
Method often uses levigate bamboo powder as raw material, and bamboo raw material is after grinding, and bamboo fibre structure is destroyed, the superperformance of bamboo material
It cannot fully demonstrate.
The content of the invention
It is an object of the invention to a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure, has high heat conduction
Property, excellent in mechanical performance, high electrical insulating properties, production cost it is low, material more environmentally friendly the advantages that being easy to degraded, can be applied to LED and dissipate
The products such as hot device and heat radiation of electrical apparatus device.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure, including cellular heat radiator body, it is cellular
The honeycomb hole of heat radiator body is vertically arranged for above-below direction, the thermoplasticity heat-conduction electric insulation composite material by weight by with
Lower component is mixed：Thermoplastic resin 50-70 parts, modified bamboo fibre 15-25 parts, high heat conduction agent 8-15 parts, dielectric material 3-
10 parts, coupling agent 0.5-1 parts, crosslinking agent 0.4-0.6 parts, lubricant 0.5-1.5 parts, antioxidant 0.3-0.8 parts.
Cellular heat radiator body, and honeycomb hole is vertically arranged for above-below direction, and smooth rising passway is provided for thermal current,
There is great lifting to radiating effect.
The present invention is used for heat-conduction electric insulation composite material using modified bamboo fibre as reinforcing material and passage of heat first
In, original inorganic filler is instead of, the addition of bamboo fibre will not destroy the power of heat conduction electricity composite absolutely as inorganic filler
Performance is learned, bamboo fibre of the invention has the characteristics such as good intensity, gas permeability, wearability, and bamboo fibre is used to lead after modified
In the exhausted composite of thermoelectricity can also reinforcing material intensity and heat conductivility, while bamboo fibre environmental-protecting performance is preferably degradable, and
Production cost is low.In order to solve bamboo wood and thermoplastic resin combination problem, the enhancing heat conduction effectiveness of bamboo fibre, this hair are given full play to
The bright bamboo fibre higher using the content of cellulose produced by ad hoc approach is modified (heat conduction additive, idol as raw material, by surface
Join the use of agent) and various additives (crosslinking agent, lubricant etc.) use in conjunction, bamboo fibre and thermoplastic resin is passed through table
Face molecule interpenetrates and winding effect, forms bamboo-plastic composite material.The material has intensity height, excellent thermal conductivity, environmental protection
The features such as performance is preferable, production cost is low.
Preferably, the thermoplastic resin be selected from polyethylene, polypropylene, polyvinyl chloride, polystyrene, makrolon,
One or more in polyphenylene sulfide, polyethylene terephthalate, polybutylene terephthalate (PBT), polyamide.
Preferably, described modification bamboo fibre is prepared by following technique：
(1) bamboo particle is put into the sodium hydroxide solution that mass concentration is 10-15% and is heated to 100-150 DEG C of boiling 1-
2h, then digested bamboo particle is drained, it is placed into steam blasting machine, the steam temperature control imported in steam blasting machine
At 140-160 DEG C, for Stress control in 0.4MPa-0.6MPa, processing time is 20-30 minutes；
(2) baiting valve of steam blasting machine is opened, material explosion in steam blasting machine is sprayed, obtains bamboo fibre；
(3) bamboo fibre is dried at 70-90 DEG C；
(4) bamboo fibre that step (3) is prepared is well mixed at -10 DEG C~-5 DEG C with solvent obtains mixed liquor,
The mass percent of bamboo fibre is 10-30% in the mixed liquor, and surplus is solvent；Bamboo fibre quality 2-10% surface will be accounted for
High heat conduction powder after processing is added in mixed liquor, and warming while stirring reacts filtering drying after 30-40min to 70-80 DEG C,
Modified bamboo fibre is made.
The quality proportioning of solvent each component is described in step (4)：Sodium hydroxide 8%, urea 12%, surplus are water.It is high
One or more of the conductive powder in nm-class boron nitride, nano aluminum nitride, nano-silicon nitride.The processing of high heat conduction powder surface
Process is：The silane coupler ethanol solution that mass concentration is 30-50% is mixed at 50-70 DEG C with high heat conduction powder
20-40min, is then heated to 80-100 DEG C of evaporative removal ethanol, and the dosage of silane coupler is the 1- of high heat conduction powder weight
1.5%.Being handled by high heat conduction powder surface makes bamboo fibre be easier to combine with high heat conduction powder.
Of the invention to obtain modified bamboo fibre using above-mentioned specific method production, the modification bamboo fibre has well strong
The characteristics such as degree, gas permeability, thermal conductivity, while coordinate the use of coupling agent, efficiently solve bamboo wood and be not easy to tie with thermoplastic resin
Conjunction problem.Production process is simple, environmental protection, and cost is low.
After explosion, the content that can obtain fiber is improved, and more loose, partial lignin is dissolved in water, hydroxide
The purpose of sodium boiling can promote lignin and cellulose to separate.
Preferably, the inorganic filler is selected from calcium carbonate, silica, titanium dioxide, zinc oxide, talcum powder, sulfuric acid
One or more in barium whisker.
Preferably, the high heat conduction agent is by 10-30wt% modified carbon nano-tube and 70-90wt% high heat conduction powder group
Into one or more of the high heat conduction powder in nm-class boron nitride, nano aluminum nitride, nano-silicon nitride.
The present invention is improved for the deficiency of typical thermal-conductive material radiating effect, and high heat conduction agent is changed by 10-30wt%'s
Property CNT and 70-90wt% high heat conduction powder composition, CNT has preferable heat dispersion, can improve material in itself
Heat conductivility, the use of CNT can also strengthen the intensity of product while heat-conducting effect is improved, and high heat conduction powder has
Excellent heat conductivility, modified carbon nano-tube be linked to be in thermoplastic resin matrix it is netted, formed skeleton, provided for high heat conduction powder
Dispersing matrixes, high heat conduction powder are attached on CNT wall, high efficiency and heat radiation net are formed, so as to improve the heat conductivility of product.Change
Property CNT amount need strict control, more easy influence insulating properties.In addition, modified bamboo fibre is dispersed in matrix resin
As passage of heat, the heat conductivility of composite is further increased.
Preferably, the preparation method step of the modified carbon nano-tube is as follows：
(1) by CNT, mass concentration 30-50% dimethyl formamide solution and acid solution according to 1g：10-
20mL：8-12mL solid-liquid ratio mixing, controls and is stirred 30-50min at 35-45 DEG C of temperature, filter, respectively with water and anhydrous
Ethanol washs, and vacuum drying 30-60min obtains primary modified carbon nano-tube at 80-100 DEG C；The acid solution is mass concentration 10-
20% nitric acid is with mass concentration 5-10% phosphoric acid according to 1:The mixture of 1 volume ratio；
(2) by primary modified carbon nano-tube and mass concentration 50-60% perchloric acid according to 1g：20-30mL solid-liquid ratio
It is well mixed, is heated to 60-70 DEG C and is kept for 24 hours, cooled down, filtered, washing, modified carbon nano-tube is obtained after vacuum drying.
Step (1) mixes CNT with mass concentration 30-50% dimethyl formamide solution and acid solution, simultaneously
It is aided with stirring, to expand the contact surface of CNT and liquid so that CNT is uniformly dispersed, and is so beneficial to subsequently sour molten
Liquid oxidation is modified.Acid solution enables to carbon nanotube hydrophilicity to reduce, lipophile increase, so as to improve CNT and thermoplastic
The adhesion of property resin.
Step (2) hydro-thermal reaction in perchloric acid by CNT, perchloric acid molecule being capable of intercalation, swelling CNTs
Beam, CNT is set to be separated from each other and the carbonaceous accessory substance of its surface high reaction activity is exposed, so as to realize selectivity
Functionalization carbonaceous accessory substance.Similar with surfactant, the carbonaceous accessory substances of these functionalization has amphipathic, can improve carbon and receive
The interaction of mitron and thermoplastic resin, CNT is assisted to disperse, so as to improve the knot of CNT and thermoplastic resin
With joint efforts.
Preferably, one or more of the dielectric material in barium strontium titanate, magnesium titanate, calcium titanate, mica.
Preferably, the crosslinking agent is cumyl peroxide or benzoyl peroxide.
Preferably, the lubricant in silicone oil, silicone master batch, calcium stearate, pentaerythritol stearate one
Kind is several.
Preferably, the antioxidant is selected from antioxidant 1010, antioxidant 1098, irgasfos 168,2,6- di-t-butyls pair
One or more in cresols.
The beneficial effects of the invention are as follows：Low, the material with high-termal conductivity, excellent in mechanical performance, high electrical insulating properties, production cost
Expect more environmentally friendly the advantages that being easy to degraded, can be applied to the product such as LED radiator and heat radiation of electrical apparatus device.
Embodiment
Below by specific embodiment, technical scheme is described in further detail.
In the present invention, if not refering in particular to, used raw material and equipment etc. are commercially available or commonly used in the art.
Method in following embodiments, it is the conventional method of this area unless otherwise instructed.
Embodiment 1：
A kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure, including cellular heat radiator body, it is cellular
The honeycomb hole of heat radiator body is that above-below direction is vertically arranged (record that concrete structure diagram can be found in the U of CN 204176465), described
Thermoplasticity heat-conduction electric insulation composite material is mixed by following components by weight：Thermoplastic resin (50 parts of polyethylene+poly-
20 parts of ethene) 70 parts, modified 15 parts of bamboo fibre, 8 parts of high heat conduction agent, 10 parts of dielectric material (5 parts of 5 parts+calcium titanate of barium strontium titanate),
0.5 part of coupling agent (Silane coupling agent KH550), 0.4 part of crosslinking agent (cumyl peroxide), 0.5 part of lubricant (silicone oil), resist
0.3 part of oxygen agent (irgasfos 168).
Described bamboo fibre is prepared by following technique：
(1) by bamboo particle (bamboo particle is less than 0.7cm by the way that mao bamboon is ground into length, and diameter is less than 0.3mm particle)
It is put into the sodium hydroxide solution that mass concentration is 10% and is heated to 100 DEG C of boiling 2h, then digested bamboo particle is drained, puts
Put in steam blasting machine (commercially available), the steam temperature imported in steam blasting machine is controlled at 140 DEG C, and Stress control exists
0.4MPaa, processing time are 30 minutes；
(2) baiting valve of steam blasting machine is opened, material explosion in steam blasting machine is sprayed, obtains bamboo fibre；
(3) bamboo fibre is dried to moisture below 5% at 70 DEG C.
(4) bamboo fibre that step (3) is prepared is well mixed at -10 DEG C with solvent obtains mixed liquor, and solvent is each
The quality proportioning of component is：Sodium hydroxide 8%, urea 12%, water 80%.The mass percent of bamboo fibre is in the mixed liquor
10%, surplus is solvent.High heat conduction powder (nm-class boron nitride) after the surface treatment for accounting for bamboo fibre quality 2% is added into mixing
In liquid, warming while stirring reacts filtering drying after 40min to 70 DEG C, and modified bamboo fibre is made.
High heat conduction powder surface processing process be：By the silane coupler (silane coupler that mass concentration is 30%
KH550) ethanol solution mixes 40min with high heat conduction powder at 50 DEG C, is then heated to 80 DEG C of evaporative removal ethanol, silicon
The dosage of alkane coupling agent is the 1% of high heat conduction powder weight.
The high heat conduction agent is made up of 30wt% modified carbon nano-tube and 70wt% nm-class boron nitride (commercially available).
The preparation method step of the modified carbon nano-tube is as follows：
(1) by CNT, the dimethyl formamide solution of mass concentration 30% and acid solution according to 1g：20mL：8mL's
Solid-liquid ratio mixes, and controls and is stirred 50min at 35 DEG C of temperature, filters, washed respectively with water and absolute ethyl alcohol, vacuum at 80 DEG C
Dry 60min and obtain primary modified carbon nano-tube；The acid solution is the nitric acid of mass concentration 10% and the phosphorus of mass concentration 10%
Acid is according to 1:The mixture of 1 volume ratio；
(2) by primary modified carbon nano-tube and the perchloric acid of mass concentration 50% according to 1g：30mL solid-liquid ratio mixing is equal
It is even, it is heated to 60 DEG C and is kept for 24 hours, cooled down, filtered, washing, modified carbon nano-tube is obtained after vacuum drying.
Embodiment 2：
A kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure, including cellular heat radiator body, it is cellular
The honeycomb hole of heat radiator body is vertically arranged for above-below direction, the thermoplasticity heat-conduction electric insulation composite material by weight by with
Lower component is mixed：50 parts of thermoplastic resin (polystyrene), modified 25 parts of bamboo fibre, 15 parts of high heat conduction agent, dielectric material
3 parts of (magnesium titanate), 1 part of coupling agent (silane coupler KH570), 0.6 part of crosslinking agent (benzoyl peroxide), lubricant (silicone oil 1
0.5 part of part+calcium stearate) 1.5 parts, 0.8 part of antioxidant (0.4 part of antioxidant 1010 ,+0.4 part of BHT).
Described bamboo fibre is prepared by following technique：
(1) by bamboo particle (bamboo particle is less than 0.7cm by the way that mao bamboon is ground into length, and diameter is less than 0.3mm particle)
It is put into the sodium hydroxide solution that mass concentration is 15% and is heated to 150 DEG C of boiling 1h, then digested bamboo particle is drained, puts
Put in steam blasting machine (commercially available), the steam temperature imported in steam blasting machine is controlled at 160 DEG C, and Stress control exists
0.6MPa, processing time are 20 minutes；
(2) baiting valve of steam blasting machine is opened, material explosion in steam blasting machine is sprayed, obtains bamboo fibre；
(3) bamboo fibre is dried to moisture below 5% at 90 DEG C.
(4) bamboo fibre that step (3) is prepared is well mixed at -5 DEG C with solvent obtains mixed liquor, solvent each group
Point quality proportioning be：Sodium hydroxide 8%, urea 12%, water 80%.The mass percent of bamboo fibre is in the mixed liquor
30%, surplus is solvent.By high heat conduction powder (nm-class boron nitride and the nanometer nitrogen after the surface treatment for accounting for bamboo fibre quality 10%
Change aluminium according to 1:1 mass ratio mixes) add in mixed liquor, warming while stirring filters baking to 80 DEG C after reacting 30min
It is dry, modified bamboo fibre is made.
High heat conduction powder surface processing process be：By the silane coupler (silane coupler that mass concentration is 50%
KH570) ethanol solution mixes 20min with high heat conduction powder at 70 DEG C, is then heated to 100 DEG C of evaporative removal ethanol,
The dosage of silane coupler is the 1.5% of high heat conduction powder weight.The high heat conduction agent by 10wt% modified carbon nano-tube and
90wt% high heat conduction powder composition, high heat conduction powder is by nm-class boron nitride and nano aluminum nitride according to 1:1 mass ratio mixes.
The preparation method step of the modified carbon nano-tube is as follows：
(1) by CNT, the dimethyl formamide solution of mass concentration 50% and acid solution according to 1g：10mL：12mL
Solid-liquid ratio mixing, control temperature 45 C under be stirred 30min, filter, washed respectively with water and absolute ethyl alcohol, at 100 DEG C
Vacuum drying 30min obtains primary modified carbon nano-tube；The acid solution is the nitric acid and mass concentration 5% of mass concentration 20%
Phosphoric acid is according to 1:The mixture of 1 volume ratio；
(2) by primary modified carbon nano-tube and the perchloric acid of mass concentration 60% according to 1g：20mL solid-liquid ratio mixing is equal
It is even, it is heated to 70 DEG C and is kept for 24 hours, cooled down, filtered, washing, modified carbon nano-tube is obtained after vacuum drying.
Embodiment 3：
A kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure, including cellular heat radiator body, it is cellular
The honeycomb hole of heat radiator body is vertically arranged for above-below direction, the thermoplasticity heat-conduction electric insulation composite material by weight by with
Lower component is mixed：60 parts of thermoplastic resin (polyamide, commercially available), modified 20 parts of bamboo fibre, 10 parts of high heat conduction agent, dielectric material
Expect 10 parts of (barium strontium titanate), 0.8 part of coupling agent (silane coupler KH560), 0.5 part of crosslinking agent (cumyl peroxide), profit
1 part of lubrication prescription (calcium stearate), 0.5 part of antioxidant (antioxidant 1010).
Described bamboo fibre is prepared by following technique：
(1) by bamboo particle (bamboo particle is less than 0.7cm by the way that mao bamboon is ground into length, and diameter is less than 0.3mm particle)
It is put into the sodium hydroxide solution that mass concentration is 12% and is heated to 120 DEG C of boiling 1.5h, then digested bamboo particle is drained,
It is placed into steam blasting machine (commercially available), the steam temperature imported in steam blasting machine is controlled at 150 DEG C, and Stress control exists
0.5MPa, processing time are 25 minutes；
(2) baiting valve of steam blasting machine is opened, material explosion in steam blasting machine is sprayed, obtains bamboo fibre；
(3) bamboo fibre is dried to moisture below 5% at 80 DEG C.
(4) bamboo fibre that step (3) is prepared is well mixed at -10 DEG C with solvent obtains mixed liquor, and solvent is each
The quality proportioning of component is：Sodium hydroxide 8%, urea 12%, water 80%.The mass percent of bamboo fibre is in the mixed liquor
20%, surplus is solvent.High heat conduction powder (nano-silicon nitride) after the surface treatment for accounting for bamboo fibre quality 5% is added into mixing
In liquid, warming while stirring reacts filtering drying after 35min to 75 DEG C, and modified bamboo fibre is made.
High heat conduction powder surface processing process be：By the silane coupler (silane coupler that mass concentration is 40%
KH560) ethanol solution mixes 30min with high heat conduction powder at 60 DEG C, is then heated to 90 DEG C of evaporative removal ethanol, silicon
The dosage of alkane coupling agent is the 1.2% of high heat conduction powder weight.The high heat conduction agent by 25wt% modified carbon nano-tube and
75wt% (commercially available) composition of nano-silicon nitride.
The preparation method step of the modified carbon nano-tube is as follows：
(1) by CNT, the dimethyl formamide solution of mass concentration 40% and acid solution according to 1g：15mL：10mL
Solid-liquid ratio mixing, control 40 DEG C of temperature at be stirred 40min, filter, wash respectively with water and absolute ethyl alcohol, at 90 DEG C very
Sky dries 50min and obtains primary modified carbon nano-tube；The acid solution is the nitric acid of mass concentration 15% and the phosphorus of mass concentration 8%
Acid is according to 1:The mixture of 1 volume ratio；
(2) by primary modified carbon nano-tube and the perchloric acid of mass concentration 55% according to 1g：25mL solid-liquid ratio mixing is equal
It is even, it is heated to 65 DEG C and is kept for 24 hours, cooled down, filtered, washing, modified carbon nano-tube is obtained after vacuum drying.
The performance of thermoplasticity heat-conduction electric insulation composite material of the present invention is as follows：
Table heat-conduction electric insulation composite material performance
| Project | Test stone | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Tensile strength/MPa | ASTM D638 | 35 | 60 | 80 |
| Elongation at break/% | ASTM D638 | 110 | 15 | 5 |
| Bending strength/MPa | ASTM D790 | 45 | 110 | 90 |
| Bending modulus/MPa | ASTM D790 | 2200 | 3500 | 6100 |
| Thermal conductivity factor/W/m.K | ASTM E 1530 | 1.8 | 2.8 | 2.2 |
| Dielectric strength V | ASTM D 194 | >6000V | >6000V | >6000V |
Embodiment described above is a kind of preferable scheme of the present invention, not the present invention is made any formal
Limitation, there are other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (7)
1. a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure, including cellular heat radiator body, cellular to dissipate
The honeycomb hole of hot body is vertically arranged for above-below direction, it is characterised in that the thermoplasticity heat-conduction electric insulation composite material is by weight
Amount part meter is mixed by following components：Thermoplastic resin 50-70 parts, modified bamboo fibre 15-25 parts, high heat conduction agent 8-15 parts,
Dielectric material 3-10 parts, coupling agent 0.5-1 parts, crosslinking agent 0.4-0.6 parts, lubricant 0.5-1.5 parts, antioxidant 0.3-0.8 parts；
Described modification bamboo fibre is prepared by following technique：
(1) bamboo particle is put into the sodium hydroxide solution that mass concentration is 10-15% and is heated to 100-150 DEG C of boiling 1-2h,
Digested bamboo particle is drained again, is placed into steam blasting machine, the steam temperature control imported in steam blasting machine exists
140-160 DEG C, for Stress control in 0.4MPa-0.6MPa, processing time is 20-30 minutes；
(2) baiting valve of steam blasting machine is opened, material explosion in steam blasting machine is sprayed, obtains bamboo fibre；
(3) bamboo fibre is dried at 70-90 DEG C；
(4) bamboo fibre that step (3) is prepared is well mixed at -10 DEG C~-5 DEG C with solvent obtains mixed liquor, described
The mass percent of bamboo fibre is 10-30% in mixed liquor, and surplus is solvent；Bamboo fibre quality 2-10% surface treatment will be accounted for
High heat conduction powder afterwards is added in mixed liquor, and warming while stirring reacts filtering drying after 30-40min to 70-80 DEG C, is made
Modified bamboo fibre；
The high heat conduction agent is made up of 10-30wt% modified carbon nano-tube and 70-90wt% high heat conduction powder, the choosing of high heat conduction powder
One or more from nm-class boron nitride, nano aluminum nitride, nano-silicon nitride；
The preparation method step of the modified carbon nano-tube is as follows：
(1) by CNT, mass concentration 30-50% dimethyl formamide solution and acid solution according to 1g: 10-20mL: 8-
12mL solid-liquid ratio mixing, controls and is stirred 30-50min at 35-45 DEG C of temperature, filter, washed respectively with water and absolute ethyl alcohol
Wash, 30-60min is dried in vacuo at 80-100 DEG C and obtains primary modified carbon nano-tube；The acid solution is mass concentration 10-20%'s
Nitric acid and mass concentration 5-10% phosphoric acid according to 1: 1 volume ratio mixture；
(2) primary modified carbon nano-tube is mixed with mass concentration 50-60% perchloric acid according to 1g: 20-30mL solid-liquid ratio
Uniformly, it is heated to 60-70 DEG C to be kept for 24 hours, cools down, filter, washing, modified carbon nano-tube is obtained after vacuum drying.
2. a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exist
In：The thermoplastic resin is selected from polyethylene, polypropylene, polyvinyl chloride, polystyrene, makrolon, polyphenylene sulfide, poly- to benzene
One or more in naphthalate, polybutylene terephthalate (PBT), polyamide.
3. a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exist
In：The one kind of the coupling agent in Silane coupling agent KH550, silane coupler KH560, silane coupler KH570.
4. a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exist
In：One or more of the dielectric material in barium strontium titanate, magnesium titanate, calcium titanate, mica.
5. a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exist
In：The crosslinking agent is cumyl peroxide or benzoyl peroxide.
6. a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exist
In：One or more of the lubricant in silicone oil, silicone master batch, calcium stearate, pentaerythritol stearate.
7. a kind of reticulated thermoplastic's heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exist
In：One kind in antioxidant 1010, antioxidant 1098, irgasfos 168, BHT of the antioxidant or
It is several.
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