CN105524423B - A kind of cellular thermosetting heat-conduction electric insulation composite material radiator structure - Google Patents
A kind of cellular thermosetting heat-conduction electric insulation composite material radiator structure Download PDFInfo
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Abstract
The invention discloses a kind of cellular thermosetting 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 thermosetting heat-conduction electric insulation composite material is mixed by following components by weight：30 50 parts of thermosetting resin, 15 25 parts of bamboo fibre, 10 20 parts of high heat conduction agent, 3 10 parts of dielectric material, 5 10 parts of inorganic combustion inhibitor, 37 parts of toughener, 0.5 1 parts of coupling agent, 0.2 0.5 parts of initiator, 0.5 1.5 parts of inner pattern releasing agent applicable, 0.3 0.8 parts of antioxidant.The present invention has high-termal conductivity, excellent in mechanical performance, high electrical insulating properties, production cost low, and material is more environmentally friendly the advantages of be 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 cellular thermosetting heat-conduction electric insulation composite material
Radiator structure.
Background technology
Thermosetting plastics is the most widely used plastics of a class, using thermosetting resin as main component, is coordinated with various necessity
Additive the plastics of product are shaped as by crosslinking curing process.It is liquid in the early stage of manufacture or forming process, after solidification
It is i.e. insoluble not melt, it can not heat or soften again.Common thermosetting plastics have phenoplasts, epoxy plastics, aminoplast,
Unsaturated polyester (UP), alkyd plastics etc..But this kind of product is all that, using non-renewable resources oil as raw material, production process energy consumption is big,
Effect on environment is more serious.Meanwhile, production cost is higher, is not easy to decompose in soil environment, easily causes " white pollution ".
Therefore, 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, should have high heat conduction, while the application scenario for having insulating properties requirement again is compared at present for some
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 is all concentrated on can not spread in the region of very little, cause the effective area of radiator not make full use of, 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, raising 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, if bamboo wood is highly polar, and hydrophily is strong, and
Plastics are that nonpolar, hydrophobicity is strong, cause the poor compatibility between bamboo wood material and plastics, interfacial combined function is poor.Conventional
Method often uses levigate bamboo powder for raw material, and bamboo raw material is after grinding, the destruction of bamboo fibre structure, 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 cellular thermosetting heat-conduction electric insulation composite material radiator structure, with high heat conduction
Property, excellent in mechanical performance, high electrical insulating properties, production cost it is low, material is more environmentally friendly the advantages of be easy to degraded, can be applied to LED and dissipates
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 cellular thermosetting 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, it is characterised in that the thermosetting heat-conduction electric insulation composite material is pressed
Parts by weight meter is mixed by following components：30-50 parts of thermosetting resin, 15-25 parts of bamboo fibre, 10-20 parts of high heat conduction agent,
3-10 parts of dielectric material, 5-10 parts of inorganic combustion inhibitor, 3-7 parts of toughener, 0.5-1 parts of coupling agent, 0.2-0.5 parts of initiator is interior
0.5-1.5 parts of releasing agent, 0.3-0.8 parts of antioxidant.
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 in heat-conduction electric insulation composite material using bamboo fibre as reinforcing material first, instead of original nothing
Machine filler, the addition of bamboo fibre will not destroy the mechanical property of heat conduction electricity composite absolutely as inorganic filler, of the invention
Bamboo fibre has the characteristics such as good intensity, gas permeability, wearability, can also reinforcing material absolutely in composite for heat conduction electricity
Intensity, while bamboo fibre environmental-protecting performance is preferably degradable, and production cost is low.Combined to solve bamboo wood and asked with thermosetting resin
Topic, gives full play to the merit of bamboo fibre, the present invention is with the higher bamboo fibre of the content of cellulose produced by ad hoc approach
For raw material, the use in conjunction of (use of coupling agent) and various additives (crosslinking agent, lubricant etc.) is modified by surface, makes bamboo
Fiber is interpenetrated with thermosetting resin by surface molecular and winding is acted on, and forms bamboo-plastic composite material.The material has strong
Degree is high, environmental-protecting performance is preferable, the low feature of production cost.
Preferably, the one kind of the thermosetting resin in epoxy resin, unsaturated polyester resin, vinylite
Or it is several.
Preferably, described 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, Stress control is in 0.4MPa-0.6MPa, and 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.
The present invention obtains bamboo fibre using above-mentioned specific method production, and the bamboo fibre has good intensity, breathed freely
Property, the characteristic such as wearability, while coordinating the use of coupling agent, efficiently solve bamboo wood and be difficult to combine problem with thermosetting resin.
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 coupling agent is selected from Silane coupling agent KH550, silane coupler KH560, silane coupler
One kind in KH570..
Preferably, the high heat conduction agent is by 30-40wt% modified carbon nano-tube and 60-70wt% 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 30-40wt%'s
Property CNT and 60-70wt% 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 is linked to be netted in thermosetting resin matrix, forms skeleton, is provided for high heat conduction powder
Dispersing matrixes, high heat conduction powder is attached on CNT wall, high efficiency and heat radiation net is formed, so as to improve the heat conductivility of product.Change
Property CNT amount need strict control, many easy influence insulating properties.
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：Stirring mixing 30-50min, filtering, respectively with water and anhydrous at 8-12mL solid-liquid ratio mixing, 35-45 DEG C of temperature of control
Ethanol is washed, 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 obtains modified carbon nano-tube 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, 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 thermosetting
The adhesion of property resin.
Step (2) hydro-thermal reaction in perchloric acid by CNT, perchloric acid molecule can intercalation, be swelled CNT
Beam, makes CNT 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 thermosetting resin, assists CNT to disperse, so as to improve the knot of CNT and thermosetting resin
With joint efforts.
Preferably, one or more of the dielectric material in barium strontium titanate, magnesium titanate, calcium titanate, mica.
Preferably, the initiator is that (peroxidating -2- ethyls are by TBPB (peroxidized t-butyl perbenzoate) or TBPO
Tert-butyl acrylate)；The inner pattern releasing agent applicable is selected from one or both of zinc stearate, stearic acid；The antioxidant is selected from antioxidant
1010th, the one or more in antioxidant 1098, irgasfos 168, DBPC 2,6 ditertiary butyl p cresol.
Preferably, the inorganic combustion inhibitor is selected from one or both of magnesium hydroxide, aluminium hydroxide.
Preferably, the toughener is selected from LNBR or liquid propene acid esters rubber.
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
Material it is more environmentally friendly be easy to degraded the advantages of, 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, raw material and equipment used etc. is commercially available or commonly used in the art.
Method in following embodiments, is the conventional method of this area unless otherwise instructed.
The component of following examples of the present invention is commercially available prod in addition to bamboo fibre.
Embodiment 1：
A kind of cellular thermosetting 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
Thermosetting heat-conduction electric insulation composite material is mixed by following components by weight：Thermosetting resin (epoxy resin) 30
Part, 15 parts of bamboo fibre, 10 parts of high heat conduction agent, 3 parts of dielectric material (magnesium titanate), 5 parts of inorganic combustion inhibitor (magnesium hydroxide), toughness reinforcing
3 parts of agent (LNBR), 0.5 part of coupling agent (Silane coupling agent KH550), 0.2 part of initiator (TBTB), inner pattern releasing agent applicable
0.5 part of (zinc stearate), 0.3 part of antioxidant (irgasfos 168).
Described bamboo fibre is prepared by following technique：
(1) by bamboo particle (by the way that mao bamboon is ground into length less than 0.7cm, diameter is less than 0.3mm particle to bamboo 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 is 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 at 70 DEG C below 5%.
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
Solid-liquid ratio mixing, control 35 DEG C of temperature at stirring mixing 50min, filtering, washed respectively with water and absolute ethyl alcohol, at 80 DEG C very
Sky dries 60min and obtains primary modified carbon nano-tube；The acid solution is the nitric acid and mass concentration 10% of mass concentration 10%
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 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 obtains modified carbon nano-tube after vacuum drying.
Embodiment 2：
A kind of cellular thermosetting 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 thermosetting heat-conduction electric insulation composite material by weight by with
Lower component is mixed：50 parts of thermosetting resin (25 parts of 25 parts+unsaturated polyester resin of epoxy resin), 25 parts of bamboo fibre is high
20 parts of thermal conducting agent, 10 parts of dielectric material (5 parts of 5 parts+calcium titanate of barium strontium titanate), inorganic combustion inhibitor (5 parts+hydroxide of magnesium hydroxide
5 parts of aluminium) 10 parts, 7 parts of toughener (LNBR), 1 part of coupling agent (silane coupler KH570), initiator (TBPO)
0.5 part, 1.5 parts of inner pattern releasing agent applicable (stearic acid), antioxidant (+0.4 part of BHT of 0.4 part of antioxidant 1010)
0.8 part.
Described bamboo fibre is prepared by following technique：
(1) by bamboo particle (by the way that mao bamboon is ground into length less than 0.7cm, diameter is less than 0.3mm particle to bamboo 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 is 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 at 90 DEG C below 5%.
The high heat conduction agent is made up of 40wt% modified carbon nano-tube and 60wt% high heat conduction powder, and high heat conduction powder is by receiving
Rice boron nitride is with nano aluminum nitride according to 1:1 mass ratio is mixed.
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 stirring mixing 30min, filtering, 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 obtains modified carbon nano-tube after vacuum drying.
Embodiment 3：
A kind of cellular thermosetting 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 thermosetting heat-conduction electric insulation composite material by weight by with
Lower component is mixed：30 parts of thermosetting resin (unsaturated polyester resin), 15 parts of bamboo fibre, 15 parts of high heat conduction agent, dielectric material
6 parts of material (barium strontium titanate), 7 parts of inorganic combustion inhibitor (magnesium hydroxide), 5 parts of toughener (liquid propene acid esters rubber), coupling agent
0.8 part of (silane coupler KH560), 0.3 part of initiator (TBPO), 1 part of inner pattern releasing agent applicable (zinc stearate), antioxidant (antioxidant
1010) 0.5 part.
Described bamboo fibre is prepared by following technique：
(1) by bamboo particle (by the way that mao bamboon is ground into length less than 0.7cm, diameter is less than 0.3mm particle to bamboo 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 is 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 at 80 DEG C below 5%.
The high heat conduction agent is made up of 35wt% modified carbon nano-tube and 65wt% nano-silicon 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 40% and acid solution according to 1g： 15mL：10mL
Solid-liquid ratio mixing, control 40 DEG C of temperature at stirring mixing 40min, filtering, washed 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 obtains modified carbon nano-tube after vacuum drying.
The preparation method system of the thermosetting plastics of the preparation of the thermosetting heat-conduction electric insulation composite material of the present invention routinely
It is standby.
The performance of thermosetting heat-conduction electric insulation composite material of the present invention is as follows：
Embodiment described above is a kind of preferably scheme of the present invention, not makees any formal to the present invention
Limitation, also has other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (7)
1. a kind of cellular thermosetting 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 thermosetting heat-conduction electric insulation composite material is by weight
Amount part meter is mixed by following components：30-50 parts of thermosetting resin, 15-25 parts of bamboo fibre, 10-20 parts of high heat conduction agent, dielectric
3-10 parts of material, 5-10 parts of inorganic combustion inhibitor, 3-7 parts of toughener, 0.5-1 parts of coupling agent, 0.2-0.5 parts of initiator, the interior demoulding
0.5-1.5 parts of agent, 0.3-0.8 parts of antioxidant.
Described 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, is placed into steam blasting machine, the steam temperature control imported in steam blasting machine exists
140-160 DEG C, Stress control is in 0.4MPa-0.6MPa, and processing time is 20-30 minutes；
（2）The 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；
The high heat conduction agent is made up of 30-40wt % modified carbon nano-tube and 60-70wt % 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-
Stirring mixing 30-50min at 12mL solid-liquid ratio mixing, 35-45 DEG C of temperature of control, filtering is washed with water and absolute ethyl alcohol respectively
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 are 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 mixing is equal
It is even, it is heated to 60-70 DEG C and is kept for 24 hours, cooled down, filtered, washing obtains modified carbon nano-tube after vacuum drying.
2. a kind of cellular thermosetting heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exists
In：One or more of the thermosetting resin in epoxy resin, unsaturated polyester resin, vinylite.
3. a kind of cellular thermosetting heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exists
In：The one kind of the coupling agent in Silane coupling agent KH550, silane coupler KH560, silane coupler KH570.
4. a kind of cellular thermosetting heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exists
In：One or more of the dielectric material in barium strontium titanate, magnesium titanate, calcium titanate, mica.
5. a kind of cellular thermosetting heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exists
In：The initiator is TBPB or TBPO；The inner pattern releasing agent applicable is selected from one or both of zinc stearate, stearic acid；It is described
One or more of the antioxidant in antioxidant 1010, antioxidant 1098, irgasfos 168, DBPC 2,6 ditertiary butyl p cresol.
6. a kind of cellular thermosetting heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exists
In：The inorganic combustion inhibitor is selected from one or both of magnesium hydroxide, aluminium hydroxide.
7. a kind of cellular thermosetting heat-conduction electric insulation composite material radiator structure according to claim 1, its feature exists
In：The toughener is selected from LNBR or liquid propene acid esters rubber.
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| CN109354831A (en) * | 2018-11-13 | 2019-02-19 | 曹佳男 | A kind of high heat conductive insulating plastic pellet and preparation method thereof |
| CN110330717A (en) * | 2019-07-23 | 2019-10-15 | 李光宽 | A kind of high temperature resistant PE film and preparation method thereof that hybrid inorganic-organic materials are modified |
| CN115011296B (en) * | 2022-07-12 | 2023-11-07 | 深圳市凯迪高科技有限公司 | Epoxy adhesive for high-viscosity optical fiber and preparation method thereof |
| CN115491009A (en) * | 2022-10-25 | 2022-12-20 | 四川坚卓装配式建筑科技有限公司 | Anisotropic composite material and preparation method thereof |
| CN115895220A (en) * | 2022-11-03 | 2023-04-04 | 四川坚卓装配式建筑科技有限公司 | Heat-conducting insulating cable protection pipe and preparation method thereof |
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| CN102234410B (en) * | 2010-04-28 | 2013-12-25 | 上海合复新材料科技有限公司 | Heat-conducting thermosetting molding composite material and application thereof |
| CN104045977A (en) * | 2014-05-30 | 2014-09-17 | 合复新材料科技(无锡)有限公司 | High-toughness heat-conduction electric-insulation flame-retardation composite material and it use |
| CN104195375B (en) * | 2014-07-22 | 2016-08-24 | 安徽冠宇光电科技有限公司 | A kind of LED aluminum-base composite heat sink material containing modified bamboo fiber |
| CN104672899B (en) * | 2014-12-22 | 2017-02-22 | 合复新材料科技(无锡)有限公司 | Thermoset high-thermal-conductivity insulating flame-retardant composite material with laser-induced metallization characteristics |
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