CN105838077A - Surface treatment method of graphene used for producing heat conducting silicon sheets - Google Patents
Surface treatment method of graphene used for producing heat conducting silicon sheets Download PDFInfo
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- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
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Abstract
The invention discloses a surface treatment method of graphene used for producing heat conducting silicon sheets. The method comprises the following steps: 1, activating graphene: preparing an H2O2 and 98% concentrated H2SO4 mixed solution containing, by mass, 10-60% of H2O2 and 40-90% of concentrated H2SO4, adding 1-30 mass% of graphene, heating the obtained solution to 50-110DEG C, continuously stirring the solution for 10-80min, separating activated graphene, washing the separated activated graphene with water, and airing or drying the washed activated graphene to obtain active graphene; and 2, carrying out surface treatment on the active graphene: carrying out surface treatment on the active graphene prepared in step 1 through a silane coupling agent or a terminated 107 adhesive. The invention also discloses a graphene heat conduction silicon sheet made of graphene obtained through the graphene surface treatment method.
Description
Technical field
The invention belongs to the preparation field of heat-conducting silica gel sheet, former specifically for preparing the Graphene of heat-conducting silica gel sheet
Material and heat-conducting silica gel sheet itself.
Background technology
Along with various electronics, the multifunction of electric equipment products and miniaturization, the negative effect that heat dissipation problem brings
The most serious.Due to internal temperature raising electronic component service life reduction, chip processing speed can be brought to slow down,
The series of problems such as idle power increase, heat dissipation design has become the important composition portion of hyundai electronics electrical apparatus industry
Point.Using fin to derive heat is one of the most frequently used heat dissipation design, but due to fin and thermal source it
Between there is inevitable gap, significantly reduce radiating effect.
Thermal interfacial material (TIM), is also called Heat Conduction Material, be used for filling between thermal source with fin engage or
The microvoid produced during contact and the hole of surface irregularity, improve between fin and thermal source greatly
Real contact area, reduces system thermal resistance, improves the performance of device heat radiation.TIM include heat-conducting silicone grease,
The variety classeses such as heat-conducting silica gel sheet, thermal conductive adhesive, phase-change material.
Heat-conducting silica gel sheet, is a kind of novel TIM occurred in recent years.Have due to self compared with tradition TIM
Standby excellent elasticity, can be fitted in different materials surface in the case of applying pressure closely, thus greatly
Amplitude reduction interface contact heat resistance.Simultaneously as heat-conducting silica gel sheet possesses elasticity, can be at a lot of electronics electricity
Serve as cushion in device product, reduce electric equipment products internal structure caused by vibrations and collision and break
Bad.Further, since heat-conducting silica gel sheet is originally as solid material, interiors of products uniform component is stable, thus keeps away
Exempted to occur heat-conducting silicone grease layering, become dry, the phenomenon such as trickling, electric equipment products is greatly improved
Stability and reliability.
Conventional heat-conducting silica gel sheet is many with metal-oxide, hydroxide, nitride as heat filling, including oxygen
Change zinc, aluminium oxide, silicon dioxide, aluminium hydroxide, magnesium hydroxide, aluminium nitride etc., metal-oxide and hydrogen
Oxide is cheap, but heat conductivity is relatively low, the most only 10～40W/m K, heat conduction prepared therefrom
Silica gel piece heat conductivity generally only has 1～4W/m K；The heat conductivity of nitride is higher, reaches 200～400
W/m K, heat-conducting silica gel sheet heat conductivity prepared therefrom is generally up to 5～7W/m K, but this type of material
Expensive, it is not suitable for producing in enormous quantities.Find new heat filling and become the primary of current TIM industry
Problem.
Graphene, as a kind of brand-new Heat Conduction Material, has high heat conductivity (5000W/m K),
Have the mechanical property of excellence simultaneously, be the desirable feedstock of a kind of heat-conductive composite material.But due to Graphene
Specific surface area the hugest, oil factor is high, causes its addition in Polymer Systems to be difficult to more than 5%
Above.It is contemplated that create a kind of novel surface processing method, improve Graphene in organosilicon systems
Addition, thus reach to improve the purpose of material thermal conductivity.
To sum up, current Graphene field of polymer technology use be disadvantageous in that following some:
1. Graphene is directly added in the middle of macromolecular material, and owing to its specific surface area is big, oil factor is high, causes
Graphene addition in Polymer Systems is substantially below 5%.Otherwise can have a strong impact on macromolecular material originally
The mechanical performance of body.
2. the surface conditioning agent of routine is used, such as silane coupler, titanate coupling agent etc., due to Graphene
There is not active group in surface, is difficult to accomplish that real surface processes.And the Graphene stability after processing is not
Good, after process, effect duration is short, material various aspects of performance instability etc. after mixing with macromolecule.
Summary of the invention
The technical problem to be solved is for above-mentioned deficiency of the prior art, it is provided that Yi Zhongyong
In the surface treatment method of the Graphene producing heat-conducting silica gel sheet, the Graphene after it processes can be further amounts of
Be used for the production of heat-conducting silica gel sheet as heat filling, prepared heat-conducting silica gel sheet possesses high thermal conductivity coefficient.
In order to achieve the above object, food stage TPE material disclosed by the invention gives by the following technical solutions
Realize:
The surface treatment method of a kind of Graphene for producing heat-conducting silica gel sheet, comprises the steps of:
(1) Graphene activation: first, configures H2O2With 98% dense H2SO4Mixed solution, wherein, H2O2
Mass ratio be 10%～60%, 98% dense H2SO4Mass ratio be 40%～90%；Secondly, to H2O2With 98%
Dense H2SO4Mixed solution in add mass fraction be the Graphene of 1%～30%, be heated to 50～110 DEG C, and
It is stirred continuously, continues 10～80min；After completing, the Graphene after activation is separated, washes, dries or dries
After Gan, obtain Activated Graphite alkene；
(2) activation Graphene surface processes；The Activated Graphite alkene prepared in step (1) is passed through silane even
Connection agent or end-blocking 107 carry out surface process.
The preferred embodiment of the present invention and further improvement are as follows:
One, the Activated Graphite alkene that step (1) prepares is entered by silane coupler in described step (2)
Row surface processes and refers to: by 1～15g silane coupler, 10～50g ethanol, 50～the mixing of 500g water, delay
Slow addition 100g Activated Graphite alkene, is sufficiently stirred for, is heated to 50～100 DEG C, backflow 30～120min.Complete
Cheng Hou, the Graphene after processing separates, dries or dry stand-by；
Activated Graphite alkene step (1) prepared in described step (2) carries out surface by end-blocking 107
Process refers to: by 5～40g end-blockings 107,50～150g toluene, 50～150g hexamethylene, 50～150g
Petroleum ether mixes, and is slowly added to 100g Activated Graphite alkene, is sufficiently stirred for, is heated to 40～120 DEG C, backflow
30～300min；After completing, the Graphene after processing separates, dries or dry stand-by.
Two, the molecular formula of described silane coupler is:
Wherein: R1For CH3And/or C2H5；R2For amine propyl group, epoxypropoxy, methacryloxypropyl
One or more of base propyl group, vinyl, ureido-propyl and mercaptopropyi；
The molecular formula of described end-blocking 107 is:
Wherein: R1For CH3And/or C2H5；N value is 3～100.
Further: comprise the steps of:
(1) Graphene activation: first, configures H2O2With 98% dense H2SO4Mixed solution, wherein, H2O2
Mass ratio be 35%, 98% dense H2SO4Mass ratio be 65%；Secondly, to H2O2With 98% dense H2SO4Mixed
Closing addition mass fraction in solution is the Graphene of 15, is heated to 80 DEG C, and is stirred continuously, continues 50min；
After completing, after the Graphene after activation is separated, washes, dries or dried, obtain Activated Graphite alkene；
(2) activation Graphene surface processes；The Activated Graphite alkene prepared in step (1) is passed through silane even
Connection agent or end-blocking 107 carry out surface process.
In above-mentioned steps (2) by step (1) prepare Activated Graphite alkene carry out table by silane coupler
Face processes and refers to: by 8g silane coupler, and 30g ethanol, 250g water mix, and is slowly added to 100g activity
Graphene, is sufficiently stirred for, and is heated to 75 DEG C, and reflux 80min.After completing, the Graphene after processing divides
From, dry or dry stand-by；
Activated Graphite alkene step (1) prepared in above-mentioned steps (2) carries out surface by end-blocking 107
Process refers to: 25g blocks 107, and 100g toluene, 100g hexamethylene, 100g petroleum ether mixes, slowly
Adding 100g Activated Graphite alkene, be sufficiently stirred for, be heated to 80 DEG C, reflux 170min；After completing, at general
Graphene after reason separates, dries or dry stand-by.
Further, also comprise the Graphene after step (2) being processed to be used for preparing Graphene heat conductive silica gel
The step of sheet: this step is as follows:
Learn from else's experience by step (2) process after Graphene 10～100 parts, add ethenyl blocking poly dimethyl
Siloxanes 30～200 parts, the methyl phenyl silicone oil 0 of ethenyl blocking～100 parts, containing hydrogen silicone oil 3～50 parts,
Platinum catalyst 1～10 parts, inhibitor 0.1～0.5 part, 300～2000 mesh metal-oxide 50～500 parts put
Enter mill or banbury is sufficiently mixed until uniformly；Then by mixture by hot pressing, scratch, roll,
One or more mode molding of spraying, obtain Graphene heat-conducting silica gel sheet.
Further: described metal-oxide is aluminium oxide, zinc oxide or magnesium oxide.
The medicine have the advantages that
The present invention carries out surface active to Graphene at a certain temperature first by Strong oxdiative thing, makes Graphene
Surface produces hydroxyl, carboxyl isoreactivity group.Then use silane coupler or end-blocking 107 etc. with silica
The Organic substance of alkyl carries out surface process to Activated Graphite alkene, obtains stable surface reason Graphene.Then
Graphene after processing prepares thermal conductive silicon with organic silicone oil, organic silicon rubber, containing hydrogen silicone oil with other adjuvants
Film.
After graphenic surface is activated by the present invention, hydroxyl and carboxyl isoreactivity base can be produced on the surface of Graphene
Group such that it is able to more preferable and silane coupler or end-blocking 107 reaction；
Method disclosed by the invention is in addition to can using traditional silane coupling agents, and the Graphene after activation is permissible
Carrying out surface process with end-blocking 107, compared with silane coupler, the Graphene after end-blocking 107 process has
The compatibility more preferable with silicone oil.
The present invention can be used alone Graphene, or uses with the collocation of conventional thermal conductive filler, can prepare
High thermal conductive silicon film, is 3～40W/m K according to different formulations and its heat conductivity of technique.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described, and following embodiment is illustrative, is not limit
Qualitatively, it is impossible to limit protection scope of the present invention with following embodiment.
Embodiment 1:
The surface treatment method of a kind of Graphene for producing heat-conducting silica gel sheet, comprises the steps of:
(1) Graphene activation: first, configures H2O2With 98% dense H2SO4Mixed solution, wherein, H2O2
Mass ratio be 10%, 98% dense H2SO4Mass ratio be 40%；Secondly, to H2O2With 98% dense H2SO4Mixed
Closing addition mass fraction in solution is the Graphene of 1%, is heated to 50 DEG C, and is stirred continuously, continues 10min；
After completing, after the Graphene after activation is separated, washes, dries or dried, obtain Activated Graphite alkene；
(2) activation Graphene surface processes；The Activated Graphite alkene prepared in step (1) is passed through silane even
Connection agent carries out surface process, and this process is: by 1g silane coupler, and 10g ethanol, 50g water mix, slow
Slow addition 100g Activated Graphite alkene, is sufficiently stirred for, is heated to 50 DEG C, and reflux 30min.After completing, at general
Graphene after reason separates, dries or dry stand-by；
Embodiment 2:
Embodiment 2 difference from Example 1 is:
The step (2) of embodiment 2 is that Activated Graphite alkene step (1) prepared is carried out by end-blocking 107
Surface processes, and this process is: by 5g end-blocking 107,50g toluene, 50g hexamethylene, 50g petroleum ether mixes,
Being slowly added to 100g Activated Graphite alkene, be sufficiently stirred for, be heated to 40 DEG C, reflux 30min；After completing, will
Graphene after process separates, dries or dry stand-by.
Embodiment 3:
The surface treatment method of a kind of Graphene for producing heat-conducting silica gel sheet, comprises the steps of:
(1) Graphene activation: first, configures H2O2With 98% dense H2SO4Mixed solution, wherein, H2O2
Mass ratio be 35%, 98% dense H2SO4Mass ratio be 65%；Secondly, to H2O2With 98% dense H2SO4Mixed
Closing addition mass fraction in solution is the Graphene of 15, is heated to 80 DEG C, and is stirred continuously, continues 50min；
After completing, after the Graphene after activation is separated, washes, dries or dried, obtain Activated Graphite alkene；
(2) activation Graphene surface processes；The Activated Graphite alkene prepared in step (1) is passed through silane even
Connection agent carries out surface process, and this process is: by 8g silane coupler, and 30g ethanol, 250g water mix, slow
Slow addition 100g Activated Graphite alkene, is sufficiently stirred for, is heated to 75 DEG C, and reflux 80min.After completing, at general
Graphene after reason separates, dries or dry stand-by；
Embodiment 4:
Embodiment 4 difference from Example 3 is:
The step (2) of embodiment 4 is that Activated Graphite alkene step (1) prepared is carried out by end-blocking 107
Surface processes, and this process is: by 25g end-blocking 107,100g toluene, 100g hexamethylene, 100g petroleum ether
Mixing, is slowly added to 100g Activated Graphite alkene, is sufficiently stirred for, be heated to 80 DEG C, and reflux 170min；Complete
Cheng Hou, the Graphene after processing separates, dries or dry stand-by.
Embodiment 5:
The surface treatment method of a kind of Graphene for producing heat-conducting silica gel sheet, comprises the steps of:
(1) Graphene activation: first, configures H2O2With 98% dense H2SO4Mixed solution, wherein, H2O2
Mass ratio be 60%, 98% dense H2SO4Mass ratio be 90%；Secondly, to H2O2With 98% dense H2SO4Mixed
Closing addition mass fraction in solution is the Graphene of 30%, is heated to 110 DEG C, and is stirred continuously, continues 80min；
After completing, after the Graphene after activation is separated, washes, dries or dried, obtain Activated Graphite alkene；
(2) activation Graphene surface processes；The Activated Graphite alkene prepared in step (1) is passed through silane even
Connection agent carries out surface process, and this process is: by 15g silane coupler, and 50g ethanol, 500g water mix,
Being slowly added to 100g Activated Graphite alkene, be sufficiently stirred for, be heated to 100 DEG C, reflux 120min.After completing,
Graphene after processing separates, dries or dry stand-by；
Embodiment 6:
Embodiment 5 difference from Example 6 is:
The step (2) of embodiment 6 is that Activated Graphite alkene step (1) prepared is carried out by end-blocking 107
Surface processes, and this process is: by 40g end-blocking 107,150g toluene, 150g hexamethylene, 150g petroleum ether
Mixing, is slowly added to 100g Activated Graphite alkene, is sufficiently stirred for, be heated to 120 DEG C, and reflux 300min；Complete
Cheng Hou, the Graphene after processing separates, dries or dry stand-by.
The Graphene that above-described embodiment 1, embodiment 3 and embodiment 5 prepare possesses high stability, heat conductivity；
Simultaneously embodiment 2, embodiment 3 and embodiment 5 correspondence compare embodiment 1, embodiment 3 and embodiment 5
The Graphene prepared possesses the more preferable compatibility, and stability is higher.On the whole, along with the increase of formula ratio,
Stability and the compatibility of the Graphene after the process of surface are the highest, it is possible to realize in silica gel piece preparation process
The purpose of middle increase addition.It is used alone Graphene, or uses with the collocation of conventional thermal conductive filler, can make
For obtaining high thermal conductive silicon film, it is 3～40W/m K according to different formulations and its heat conductivity of technique.
Graphene after activation can carry out surface process with end-blocking 107, compared with silane coupler, and end-blocking
Graphene after 107 process has the compatibility more preferable with silicone oil.
Prepare heat-conducting silica gel sheet for the surface treatment method using above-mentioned Graphene, We conducted following reality
Execute example:
Embodiment 7:
Graphene heat-conducting silica gel sheet, comprises the following steps:
Learn from else's experience respectively the Graphene 10 after being processed by the surface treatment method of embodiment 1～6～100 parts, respectively
Proceed as follows and prepare heat-conducting silica gel sheet:
Add the polydimethylsiloxane 30 parts of ethenyl blocking, the methyl phenyl silicone oil 1 part of ethenyl blocking,
Containing hydrogen silicone oil 3 parts, platinum catalyst 1 part, inhibitor 0.1 part, 300 mesh metal-oxide 50 parts are put into
Mill is sufficiently mixed until uniformly；Then by mixture by calendering formation, Graphene heat conductive silica gel is obtained
Sheet.
Embodiment 8:
Graphene heat-conducting silica gel sheet, comprises the following steps:
Graphene 55 parts after learning from else's experience respectively by the surface treatment method process of embodiment 1～6, is carried out respectively
Following operation prepares heat-conducting silica gel sheet:
Add the polydimethylsiloxane 115 parts of ethenyl blocking, the methyl phenyl silicone oil 55 of ethenyl blocking
Part, containing hydrogen silicone oil 26 parts, platinum catalyst 6 parts, inhibitor 0.3 part, 1150 mesh metal-oxides 260
Part is put into mill and is sufficiently mixed until uniformly；Then by mixture by calendering formation, obtain Graphene and lead
Hot silica gel piece.
Embodiment 9:
Graphene heat-conducting silica gel sheet, comprises the following steps:
Graphene 100 parts after learning from else's experience respectively by the surface treatment method process of embodiment 1～6, is carried out respectively
Following operation prepares heat-conducting silica gel sheet:
Add the polydimethylsiloxane 200 parts of ethenyl blocking, the methyl phenyl silicone oil 100 of ethenyl blocking
Part, containing hydrogen silicone oil 50 parts, platinum catalyst 10 parts, inhibitor 0.5 part, 2000 mesh metal-oxides 500
Part is put into mill and is sufficiently mixed until uniformly；Then by mixture by calendering formation, obtain Graphene and lead
Hot silica gel piece.
The thickness of the heat-conducting silica gel sheet that above-described embodiment 7～8 prepares is 1～3mm；Heat conductivity 3～
10W/m·K；It possesses low cost to compare conventional thermal conductive silica gel piece, and heat conductivity is high, is suitable to large-scale production.
Above the preferred embodiment for the present invention is explained in detail, but the invention is not restricted to above-mentioned embodiment party
Formula, in the ken that those of ordinary skill in the art are possessed, it is also possible to without departing from present inventive concept
On the premise of make a variety of changes, these changes relate to correlation technique well-known to those skilled in the art, this
Both fall within the protection domain of patent of the present invention a bit.
Many other can be made without departing from the spirit and scope of the present invention to change and remodeling.Should be appreciated that this
Invention is not limited to specific embodiment, and the scope of the present invention is defined by the following claims.
Claims (6)
1. the surface treatment method being used for producing the Graphene of heat-conducting silica gel sheet, it is characterised in that comprise
Following steps:
(1) Graphene activation: first, configures H2O2With 98% dense H2SO4Mixed solution, wherein, H2O2
Mass ratio be 10%～60%, 98% dense H2SO4Mass ratio be 40%～90%；Secondly, to H2O2With 98%
Dense H2SO4Mixed solution in add mass fraction be the Graphene of 1%～30%, be heated to 50～110 DEG C, and
It is stirred continuously, continues 10～80min；After completing, the Graphene after activation is separated, washes, dries or dries
After Gan, obtain Activated Graphite alkene；
(2) activation Graphene surface processes；The Activated Graphite alkene prepared in step (1) is passed through silane even
Connection agent or end-blocking 107 carry out surface process.
A kind of surface treatment method of the Graphene for producing heat-conducting silica gel sheet,
It is characterized in that, Activated Graphite alkene step (1) prepared in described step (2) is by silane coupled
Agent carries out surface process and refers to: by 1～15g silane coupler, and 10～50g ethanol, 50～500g water mix,
It is slowly added to 100g Activated Graphite alkene, is sufficiently stirred for, be heated to 50～100 DEG C, backflow 30～120min.
After completing, the Graphene after processing separates, dries or dry stand-by；
Activated Graphite alkene step (1) prepared in described step (2) carries out surface by end-blocking 107
Process refers to: by 5～40g end-blockings 107,50～150g toluene, 50～150g hexamethylene, 50～150g
Petroleum ether mixes, and is slowly added to 100g Activated Graphite alkene, is sufficiently stirred for, is heated to 40～120 DEG C, backflow
30～300min；After completing, the Graphene after processing separates, dries or dry stand-by.
A kind of surface treatment method of the Graphene for producing heat-conducting silica gel sheet,
It is characterized in that, the molecular formula of described silane coupler is:
Wherein: R1For CH3And/or C2H5；R2For amine propyl group, epoxypropoxy, methacryloxypropyl
One or more of base propyl group, vinyl, ureido-propyl and mercaptopropyi；
The molecular formula of described end-blocking 107 is:
Wherein: R1For CH3And/or C2H5；N value is 3～100.
A kind of surface treatment method of the Graphene for producing heat-conducting silica gel sheet,
It is characterized in that, comprise the steps of:
(1) Graphene activation: first, configures H2O2With 98% dense H2SO4Mixed solution, wherein, H2O2
Mass ratio be 35%, 98% dense H2SO4Mass ratio be 65%；Secondly, to H2O2With 98% dense H2SO4Mixed
Closing addition mass fraction in solution is the Graphene of 15, is heated to 80 DEG C, and is stirred continuously, continues 50min；
After completing, after the Graphene after activation is separated, washes, dries or dried, obtain Activated Graphite alkene；
(2) activation Graphene surface processes；The Activated Graphite alkene prepared in step (1) is passed through silane even
Connection agent or end-blocking 107 carry out surface process.
In above-mentioned steps (2) by step (1) prepare Activated Graphite alkene carry out table by silane coupler
Face processes and refers to: by 8g silane coupler, and 30g ethanol, 250g water mix, and is slowly added to 100g activity
Graphene, is sufficiently stirred for, and is heated to 75 DEG C, and reflux 80min.After completing, the Graphene after processing divides
From, dry or dry stand-by；
Activated Graphite alkene step (1) prepared in above-mentioned steps (2) carries out surface by end-blocking 107
Process refers to: 25g blocks 107, and 100g toluene, 100g hexamethylene, 100g petroleum ether mixes, slowly
Adding 100g Activated Graphite alkene, be sufficiently stirred for, be heated to 80 DEG C, reflux 170min；After completing, at general
Graphene after reason separates, dries or dry stand-by.
5. the surface of a kind of Graphene for producing heat-conducting silica gel sheet as described in Claims 1 to 4 is arbitrary
Reason method, it is characterised in that: also comprise the Graphene after step (2) being processed and be used for preparing Graphene heat conduction
The step of silica gel piece: this step is as follows:
Learn from else's experience by step (2) process after Graphene 10～100 parts, add ethenyl blocking poly dimethyl
Siloxanes 30～200 parts, the methyl phenyl silicone oil 0 of ethenyl blocking～100 parts, containing hydrogen silicone oil 3～50 parts,
Platinum catalyst 1～10 parts, inhibitor 0.1～0.5 part, 300～2000 mesh metal-oxide 50～500 parts put
Enter mill or banbury is sufficiently mixed until uniformly；Then by mixture by hot pressing, scratch, roll,
One or more mode molding of spraying, obtain Graphene heat-conducting silica gel sheet.
A kind of surface treatment method of the Graphene for producing heat-conducting silica gel sheet,
It is characterized in that: described metal-oxide is aluminium oxide, zinc oxide or magnesium oxide.
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| CN (1) | CN105838077A (en) |
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| CN106832961A (en) * | 2017-02-28 | 2017-06-13 | 深圳市大族元亨光电股份有限公司 | The preparation method of Graphene thermal conductive silicon rubber cushion |
| CN108165016A (en) * | 2018-01-19 | 2018-06-15 | 林荣铨 | A kind of preparation method of modified graphene heat-conducting silicone grease |
| CN108264771A (en) * | 2018-01-19 | 2018-07-10 | 林荣铨 | A kind of preparation method and applications of graphene heat-conducting silicone grease |
| CN112812714A (en) * | 2021-02-06 | 2021-05-18 | 惠州东铭新能源研究院有限公司 | Fireproof flame-retardant buffer aerogel product capable of absorbing stress and manufacturing method thereof |
| CN114316598A (en) * | 2022-01-26 | 2022-04-12 | 广东信力科技股份有限公司 | Preparation method of high-thermal-conductivity organic silicon rubber composite material |
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Application publication date: 20160810 |