CN107501838A - A kind of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials and its preparation method and application - Google Patents
A kind of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials and its preparation method and application Download PDFInfo
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- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract
The present invention provides a kind of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials and its preparation method and application, and the raw material of the heat sink material includes SEBS, POE, PP, isoprene, methyl methacrylate, carborundum, metallic fiber, cellulose fibre, filler, base oil and auxiliary agent.Compounding has isoprene, methyl methacrylate and carborundum in heat sink material of the present invention, by block copolymerization with directly reacting in preparation process, it is compound in the components such as SEBS, POE, PP, acts synergistically each other, improves the heat dispersion and mechanical performance of composite.The heat sink material has excellent heat-resisting and heat dispersion, and characterizes with excellent mechanics and physics and anticorrosion and radiation resistance, ageing-resistant high resiliency and fire retardant performance, and the material preparation process is simple, is adapted to industrialization, application field extensive.
Description
Technical field
The invention belongs to polymeric material field, a kind of composite high-molecular material is designed, more particularly to a kind of high temperature resistant is resistance to
Corrode TPE complex silicon carbide heat sink materials and its preparation method and application.
Background technology
Thermoplastic elastomer (TPE) TPE is a kind of high resiliency with rubber, high intensity, high resilience, have again can be molded plus
The material of work feature.TPE has environment-protecting and non-poisonous safety, and hardness range is wide, there is an excellent coloring, soft-touch, weatherability,
Fatigue resistance and temperature tolerance, processing characteristics is superior, without vulcanization many advantages, such as, therefore, as a kind of new multi-functional ring
Material is protected, TPE has boundless application market, such as household electrical appliance, sports goods, automotive material, medicine equipment, construction industry
With shoe industry etc..At present, TPE material is usually with thermoplastic elastomer (TPE) hydrogenated styrene-butadiene-styrene block copolymers
(SEBS), thermoplastic polypropylene and some suitable fillers are what raw material was prepared.SEBS elastomer blocks
Hydrogenate completely, make it have excellent weather resistance, there is good tolerance to ozone, ultraviolet, electric arc, also make its tool
There is resistance to low temperature, good pliability is still kept under the conditions of -60 DEG C the features such as.Although SEBS has excellent rubber bullet
Property, excellent weatherability, lower temperature resistance, environmental-protecting performance etc., but using SEBS as elastomeric material asked with the presence of some
Topic, if SEBS is compared with traditional vulcanization rubber, there is rigidity it is excessive, compression is big, density is high the shortcomings of；It uses temperature
The upper limit and solvent resistance, oil resistivity etc. are spent generally all not as good as conventional vulcanized rubbers etc..In addition, PP is cheap, can reduce
SEBS cost.
The content of the invention
For technical problem present in prior art, the present invention provides a kind of corrosion-and high-temp-resistant TPE complex silicon carbides
Heat sink material, the heat sink material have excellent heat-resisting and heat dispersion, and characterize with excellent mechanics and physics and prevent
Corrosion and radiation resistance, ageing-resistant high resiliency and fire retardant performance, the material preparation process is simple, suitable industrialization,
Application field is extensive
To reach above-mentioned purpose, the present invention takes following technical scheme：
It is an object of the present invention to provide a kind of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, the radiating
The raw material of material include SEBS, POE, PP, isoprene, methyl methacrylate, carborundum, metallic fiber, cellulose fibre,
Filler, base oil and auxiliary agent.
As currently preferred technical scheme, the diameter ratio of the metallic fiber and the cellulose fibre is 1:(0.5
~2.0), such as 1:0.5、1:0.6、1:0.7、1:0.8、1:0.9、1:1.0、1:1.1、1:1.2、1:1.3、1:1.4、1:1.5、1:
1.6、1:1.7、1:1.8、1:1.9 or 1:2.0 etc., it is not limited to cited numerical value, interior other of the number range do not arrange
The numerical value of act is equally applicable.
Metallic fiber is added in heat sink material of the present invention, while adds cellulose fibre, by metallic fiber and fiber
Cellulose fiber mixes, and winds to obtain composite fibre by two kinds of fibers using electrostatic, composite fibre have simultaneously excellent toughness and
Ductility, the two, which acts synergistically, improves the elasticity of TPE material, and at high temperature because temperature is to metal and cellulose fibre
Influence small, TPE material still keeps original elasticity under the high temperature conditions, and the introducing of metallic fiber causes the TPE material
Obtain capability of electromagnetic shielding so that the TPE material may be used as CABLE MATERIALS or anti-electromagnetism fabric etc., be passed as electricity or signal
Defeated device can effectively suppress the loss of energy.
Compounding has isoprene, methyl methacrylate and carborundum in heat sink material of the present invention, is preparing
It is compound in the components such as SEBS, POE, PP, acts synergistically each other, improve composite wood with directly reacting by block copolymerization in journey
The heat dispersion and mechanical performance of material.
As currently preferred technical scheme, the metallic fiber includes aluminum fiber, nickel fiber, copper fiber or cobalt fiber
In any one or at least two combination.
Preferably, the length of the metallic fiber is 100~500 μm, such as 100 μm, 150 μm, 200 μm, 250 μm, 300 μ
M, 350 μm, 400 μm, 450 μm or 500 μm etc., it is not limited to cited numerical value, other are unrequited in the number range
Numerical value it is equally applicable.
Preferably, the radius of the metallic fiber be 5~20 μm, 5 μm, 6 μm, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm or
20 μm etc., it is not limited to cited numerical value, other interior unrequited numerical value of the number range are equally applicable.
Preferably, the length of the cellulose fibre be 100~500 μm, such as 100 μm, 150 μm, 200 μm, 250 μm, 300
μm, 350 μm, 400 μm, 450 μm or 500 μm etc., it is not limited to cited numerical value, other are unrequited in the number range
Numerical value it is equally applicable.
Preferably, the radius of the cellulose fibre be 3~15 μm, such as 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10
μm, 11 μm, 12 μm, 13 μm, 14 μm or 15 μm etc., it is not limited to cited numerical value, other are not arranged in the number range
The numerical value of act is equally applicable.
As currently preferred technical scheme, include according to the raw material of heat sink material described in mass parts meter：
Wherein, SEBS mass parts can be 25 parts, 26 parts, 28 parts, 30 parts, 32 parts, 35 parts, 38 parts, 40 parts, 42 parts,
45 parts, 48 parts or 50 parts etc., POE mass parts can be 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts etc., PP
Mass parts can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts or 15 parts etc., isoprene
Mass parts can be 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts etc., and the mass parts of methyl methacrylate can
To be 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts etc., the mass parts of carborundum can be 1 part, 2 parts, 3 parts, 4
Part or 5 parts etc., the mass parts of metallic fiber can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts,
19 parts or 20 parts etc., the mass parts of cellulose fibre can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts etc., the mass parts of filler
It can be 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, 22 parts, 25 parts, 28 parts or 30 parts etc., the mass parts of base oil can be 30
Part, 32 parts, 35 parts, 38 parts, 40 parts, 42 parts, 45 parts, 48 parts or 50 parts etc., the mass parts of auxiliary agent can be 2 parts, 2.5 parts, 3
Part, 3.5 parts, 4 parts, 4.5 parts or 5 parts etc., it is not limited to cited numerical value, other are unrequited in above-mentioned each number range
Numerical value it is equally applicable.
As currently preferred technical scheme, the number-average molecular weight of the SEBS is 8000~12000, such as 8000,
9000th, 10000,11000 or 12000 etc., it is not limited to cited numerical value, other interior unrequited numbers of the number range
It is worth equally applicable.
Preferably, the mass ratio of the isoprene and methyl methacrylate is (0.5~2):1, such as 0.5:1、0.6:
1、0.8:1、1:1、1.2:1、1.5:1、1.8:1 or 2:1 etc., it is not limited to cited numerical value, in the number range its
His unrequited numerical value is equally applicable.
Preferably, the filler includes any one in talcum powder, rutile titanium white powder or silica or at least two
Combination, it is described combination typical case but non-limiting examples have：The combination of talcum powder and rutile titanium white powder, rutile titanium white powder and
The combination of silica, the combination of silica and talcum powder or combination of talcum powder, rutile titanium white powder and silica etc..
As currently preferred technical scheme, the mass parts of the antioxidant are 1~3 part, such as 1 part, 1.2 parts, 1.5
Part, 1.8 parts, 2 parts, 2.2 parts, 2.5 parts, 2.8 parts or 3 parts etc., it is not limited to cited numerical value, in the number range its
His unrequited numerical value is equally applicable.
Preferably, the mass parts of the coupling agent be 0.5~1 part, such as 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part or
1 part etc., it is not limited to cited numerical value, other interior unrequited numerical value of the number range are equally applicable.
Preferably, the mass parts of the fire retardant be 0.5~1 part, such as 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part or
1 part etc., it is not limited to cited numerical value, other interior unrequited numerical value of the number range are equally applicable.
Preferably, the antioxidant include irgasfos 168, antioxidant 1010 or antioxidant 1076 in any one or at least
Two kinds of combination, the combination is typical but non-limiting examples have：The combination of irgasfos 168 and antioxidant 1010, antioxidant
1010 and the combination of antioxidant 1076, the combination of antioxidant 1076 and irgasfos 168 or irgasfos 168, antioxidant 1010 and anti-
Combination of oxygen agent 1076 etc..
Preferably, the coupling agent is any one in Silane coupling agent KH550, KH560 or KH570 or at least two
Combination, the combination is typical but non-limiting examples have：Silane coupling agent KH550 and silane coupler KH560 combination, silane
Coupling agent KH560 and silane coupler KH570, silane coupler KH570 and Silane coupling agent KH550 combination or silane coupled
Agent KH550, silane coupler KH560 and silane coupler KH570 combination etc..
Preferably, the fire retardant is Halogen red phosphorus combustion inhibitor and/or Sb system fire retardant.
The two of the object of the invention are to provide a kind of preparation method of above-mentioned TPE material, the described method comprises the following steps：
(1) metallic fiber and cellulose fibre are mixed, obtains composite fibre；
(2) the pretreated carbon fibre for obtaining step (1), is mixed with SEBS, POE, PP, base oil and auxiliary agent,
Granulating and forming in double screw extruder is added to, obtains the TPE material.
The preparation method first stirs cellulose fibre under high velocity agitation makes its surface carry electrostatic, adds metal
Fiber, using electrostatic adsorption, the metallic fiber for being winds with cellulose fibre and obtains composite fibre.
As currently preferred technical scheme, step (1) mixing is carried out under agitation.
Preferably, the rotating speed of the stirring is 2000~5000rpm, as 2000rpm, 2500rpm, 3000rpm,
3500rpm, 4000rpm or 4500rpm etc., it is not limited to cited numerical value, other are unrequited in the number range
Numerical value is equally applicable.
Preferably, the time of the stirring is 1~3h, such as 1h, 1.2h, 1.5h, 1.8h, 2h, 2.2h, 2.5h, 2.8h or
3h etc., it is not limited to cited numerical value, other interior unrequited numerical value of the number range are equally applicable.
Preferably, step (2) mixing is carried out under agitation.
Preferably, the rotating speed of the stirring is 800~1500rpm, as 800rpm, 900rpm, 1000rpm, 1100rpm,
1200rpm, 1300rpm, 1400rpm or 1500rpm etc., it is not limited to cited numerical value, in the number range other
Unrequited numerical value is equally applicable.
Preferably, the time of the stirring is 20~60min, as 20min, 25min, 30min, 35min, 40min,
45min, 50min, 55min or 60min etc., it is not limited to cited numerical value, other are unrequited in the number range
Numerical value is equally applicable.
Preferably, the feeding section temperature that double screw extruder is set in step (2) is 170~190 DEG C, such as 170 DEG C, 172
DEG C, 175 DEG C, 178 DEG C, 180 DEG C, 182 DEG C, 185 DEG C, 188 DEG C or 190 DEG C etc., it is not limited to cited numerical value, the number
Other unrequited numerical value are equally applicable in the range of value.
Preferably, the mixing section temperature that double screw extruder is set in step (2) is 200~220 DEG C, such as 200 DEG C, 202
DEG C, 205 DEG C, 208 DEG C, 210 DEG C, 212 DEG C, 215 DEG C, 218 DEG C or 220 DEG C etc., it is not limited to cited numerical value, the number
Other unrequited numerical value are equally applicable in the range of value.
Preferably, the extruding zone temperature that double screw extruder is set in step (2) is 230~250 DEG C, such as 230 DEG C, 232
DEG C, 235 DEG C, 238 DEG C, 240 DEG C, 242 DEG C, 245 DEG C, 248 DEG C or 250 DEG C etc., it is not limited to cited numerical value, the number
Other unrequited numerical value are equally applicable in the range of value.
Preferably, the head temperature that double screw extruder is set in step (2) is 220~230 DEG C, such as 220 DEG C, 221 DEG C,
222 DEG C, 223 DEG C, 224 DEG C, 225 DEG C, 226 DEG C, 227 DEG C, 228 DEG C, 229 DEG C or 230 DEG C.
The three of the object of the invention are to provide a kind of application of above-mentioned heat sink material, and the heat sink material is applied to intelligence electricity
Sub- equipment, new-energy automobile or aerospace field.
Compared with prior art, the present invention at least has the advantages that：
(1) invention provides a kind of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, and the heat sink material has excellent
Heat dispersion, heat transfer coefficient is up to more than 2.30W/mK；
(2) present invention provides a kind of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, and the heat sink material has excellent
Different heat resistance, at 200 DEG C, the elongation at break of the heat sink material is reduced only by 2% or so, and capability of electromagnetic shielding can
Up to 120DB；
(3) present invention provides a kind of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, and the heat sink material has excellent
Different elasticity, elongation at break are up to more than 1550%, and tensile strength is in more than 32.5MPa, according to left 1.5% to deformation rate
The right side, fire protecting performance is up to V-0 levels；
(4) present invention provides a kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, the preparation
Method technique is simply applied to industrialized production.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art are it will be clearly understood that the implementation
Example is only to aid in understanding the present invention, is not construed as the concrete restriction to the present invention.
Embodiment 1
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, the described method comprises the following steps：
(1) 10 parts of aluminum fibers and 5 parts of cellulose fibres are mixed into 3h under 2000rpm, obtains composite fibre；
(2) composite fibre for obtaining step (1), with 25 parts of SEBS, 2 parts of POE, 5 parts of PP, 2 parts of isoprene, 2 parts of first
Base methyl acrylate, 1 part of carborundum, 30 parts of base oils, 10 parts of talcum powder, 1 part of antioxidant 1010,0.5 part of silane coupler
KH550 and 0.5 part of Sb system fire retardant is stirred 60min at 800 rpm, adds mixture into double screw extruder
Granulating and forming, obtain the TPE material.
Wherein, the temperature of the double screw extruder feeding section is 170 DEG C, and the temperature of mixing section is 200 DEG C, extruding zone temperature
Spend for 230 DEG C, head temperature is 220 DEG C；SEBS number-average molecular weight is 8000；The length of aluminum fiber is 100 μm, a diameter of 5 μ
M, the length of cellulose fibre is 100 μm, a diameter of 5 μm.
Embodiment 2
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, the described method comprises the following steps：
(1) 20 parts of nickel fibers and 10 parts of cellulose fibres are mixed into 1h under 5000rpm, obtains composite fibre；
(2) composite fibre for obtaining step (1), with 50 parts of SEBS, 10 parts of POE, 15 parts of PP, 10 parts of isoprene, 10
Part methyl methacrylate, 5 parts of carborundum, 50 parts of base oils, 30 parts of rutile titanium white powder, 3 parts of irgasfos 168s, 1 part of silane idol
Connection agent KH560 and 1 part of Halogen red phosphorus combustion inhibitor are stirred 20min at 1500 rpm, add mixture into twin-screw and squeeze
Go out granulating and forming in machine, obtain the TPE material.
Wherein, the temperature of the double screw extruder feeding section is 190 DEG C, and the temperature of mixing section is 220 DEG C, extruding zone temperature
Spend for 250 DEG C, head temperature is 230 DEG C；SEBS number-average molecular weight is 12000；The length of nickel fiber is 500 μm, a diameter of
20 μm, the length of cellulose fibre is 500 μm, a diameter of 10 μm.
Embodiment 3
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, the described method comprises the following steps：
(1) 15 parts of copper fibers and 8 parts of cellulose fibres are mixed into 1.5h under 3500rpm, obtains composite fibre；
(2) composite fibre for obtaining step (1), with 35 parts of SEBS, 6 parts of POE, 10 parts of PP, 5 parts of isoprene, methyl
5 parts of methyl acrylate, 3 parts, 40 parts base oils of carborundum, 20 parts of silica, 2 parts of antioxidant 1010s, 0.8 part of silane coupler
KH570 and 0.8 part of Sb system fire retardant is stirred 45min under 1000rpm, adds mixture into double screw extruder
Granulating and forming, obtain the TPE material.
Wherein, the temperature of the double screw extruder feeding section is 180 DEG C, and the temperature of mixing section is 210 DEG C, extruding zone temperature
Spend for 240 DEG C, head temperature is 235 DEG C；SEBS number-average molecular weight is 10000；The length of copper fiber is 300 μm, a diameter of
15 μm, the length of cellulose fibre is 300 μm, a diameter of 15 μm.
Embodiment 4
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, the described method comprises the following steps：
(1) 5 parts of cobalt fibers, 10 parts of nickel fibers and 6 parts of cellulose fibres are mixed into 1.2h under 4000rpm, mixed
Fiber；
(2) composite fibre for obtaining step (1), with 40 parts of SEBS, 8 parts of POE, 12 parts of PP, 8 parts of isoprene, methyl
4 parts of methyl acrylate, 4 parts, 45 parts base oils of carborundum, 25 parts, 1.5 parts antioxidant 1076s of talcum powder, 0.6 part of silane coupler
KH550 and 0.6 part of Sb system fire retardant is stirred 40min under 1100rpm, adds mixture into double screw extruder
Granulating and forming, obtain the TPE material.
Wherein, the temperature of the double screw extruder feeding section is 185 DEG C, and the temperature of mixing section is 215 DEG C, extruding zone temperature
Spend for 245 DEG C, head temperature is 225 DEG C；SEBS number-average molecular weight is 10000；The length of copper fiber be 200 μm, a diameter of 5
μm, the length of cellulose fibre is 200 μm, a diameter of 10 μm.
Embodiment 5
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, the described method comprises the following steps：
(1) 8 bronze medal part cobalt fibers, 8 parts of aluminum fibers and 8 parts of cellulose fibres are mixed into 2h at 3,000 rpm, it is fine obtains mixing
Dimension；
(2) composite fibre for obtaining step (1), with 45 parts of SEBS, 5 parts of POE, 8 parts of PP, 4 parts of isoprene, 8 parts of first
Base methyl acrylate, 3 parts of carborundum, 35 parts of base oils, 15 parts of talcum powder, 1.2 parts of antioxidant 1076s, 0.6 part of silane coupler
KH550 and 0.6 part of Sb system fire retardant is stirred 40min under 1000rpm, adds mixture into double screw extruder
Granulating and forming, obtain the TPE material.
Wherein, the temperature of the double screw extruder feeding section is 155 DEG C, and the temperature of mixing section is 205 DEG C, extruding zone temperature
Spend for 235 DEG C, head temperature is 225 DEG C；SEBS number-average molecular weight is 10000；The length of copper fiber be 200 μm, a diameter of 5
μm, the length of cellulose fibre is 200 μm, a diameter of 10 μm.
Comparative example 1
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, methods described is except being added without gold
Belong to outside fiber and cellulose fibre, other conditions are same as Example 3.
Comparative example 2
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, methods described is except being added without gold
Belong to outside fiber, other conditions are same as Example 3.
Comparative example 3
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, methods described is except being added without fibre
Outside cellulose fiber, other conditions are same as Example 3.
Comparative example 4
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, methods described is except the gold used
Belong to a diameter of 20 μm of fiber, a diameter of 3 μm of cellulose fibre are outer, and other conditions are same as Example 3.
Comparative example 5
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, methods described is except the gold used
Belong to a diameter of 5 μm of fiber, a diameter of 15 μm of cellulose fibre are outer, and other conditions are same as Example 3.
Comparative example 6
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, methods described are different except being added without
Outside pentadiene, other conditions are same as Example 3.
Comparative example 7
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, methods described is except being added without first
Outside base methyl acrylate, other conditions are same as Example 3.
Comparative example 8
A kind of preparation method of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, methods described is except being added without carbon
Outside SiClx, other conditions are same as Example 3.
To heat resistance, elasticity, anti-flammability and the electromagnetic screen of embodiment 1-5 and comparative example the 1-8 TPE material being prepared
Cover performance to be tested, as a result as shown in table 1.
Table 1
Can be seen that the heat sink material that embodiment 1-5 is prepared by the test result of table 1 has excellent thermal diffusivity
Can, heat transfer coefficient is up to more than 2.30W/mK, excellent heat resistance, at 200 DEG C, the elongation at break of the TPE material
Be reduced only by 2% or so, there is excellent elasticity, elongation at break is up to more than 1550%, and tensile strength 32.5MPa with
On, according to deformation rate, 1.5% or so, and grade of burning is V-0 levels, capability of electromagnetic shielding reaches 130DB.Comparative example 1 is to add
Adding metallic fiber and cellulose fibre, heat resistance and elasticity are decreased obviously, and almost without capability of electromagnetic shielding.Comparative example 2
Metallic fiber and cellulose fibre are not used respectively with 3, causes capability of electromagnetic shielding and heat resistance to be decreased obviously, and
The diameter ratio of the metallic fiber of comparative example 4 and 5 and cellulose fibre goes beyond the scope, under causing capability of electromagnetic shielding and elasticity obvious
Drop.Isoprene, methyl methacrylate and carborundum is not used in comparative example 6-8 respectively, causes the globality of heat sink material
It can decline comprehensively.
Applicant states that the present invention illustrates the detailed process equipment of the present invention and technological process by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, it is above-mentioned detailed not mean that the present invention has to rely on
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of corrosion-and high-temp-resistant TPE complex silicon carbide heat sink materials, it is characterised in that the raw material of the heat sink material includes
SEBS, POE, PP, isoprene, methyl methacrylate, carborundum, metallic fiber, cellulose fibre, filler, base oil and
Auxiliary agent.
2. heat sink material according to claim 1, it is characterised in that the metallic fiber is straight with the cellulose fibre
Footpath ratio is 1:(0.5~2.0).
3. heat sink material according to claim 1 or 2, it is characterised in that it is fine that the metallic fiber includes aluminum fiber, nickel
Any one in dimension, copper fiber or cobalt fiber or at least two combination；
Preferably, the length of the metallic fiber is 100~500 μm；
Preferably, the radius of the metallic fiber is 5~20 μm；
Preferably, the length of the cellulose fibre is 100~500 μm；
Preferably, the radius of the cellulose fibre is 3~15 μm.
4. according to the heat sink material described in claim any one of 1-3, it is characterised in that according to TPE material described in mass parts meter
Raw material include：
5. according to the heat sink material described in claim any one of 1-4, it is characterised in that the number-average molecular weight of the SEBS is
8000~12000；
Preferably, the mass ratio of the isoprene and methyl methacrylate is (0.5~2):1；
Preferably, group of the filler including any one in talcum powder, rutile titanium white powder or silica or at least two
Close.
6. according to the heat sink material described in claim any one of 1-5, it is characterised in that the auxiliary agent includes antioxidant, coupling
Agent and fire retardant.
7. heat sink material according to claim 6, it is characterised in that the mass parts of the antioxidant are 1~3 part；
Preferably, the mass parts of the coupling agent are 0.5~1 part；
Preferably, the mass parts of the fire retardant are 0.5~1 part；
Preferably, the antioxidant includes any one in irgasfos 168, antioxidant 1010 or antioxidant 1076 or at least two
Combination；
Preferably, the coupling agent is any one in Silane coupling agent KH550, KH560 or KH570 or at least two group
Close；
Preferably, the fire retardant is Halogen red phosphorus combustion inhibitor and/or Sb system fire retardant.
A kind of 8. preparation method of the heat sink material described in any one of claim 1-7, it is characterised in that methods described include with
Lower step：
(1) metallic fiber and cellulose fibre are mixed, obtains composite fibre；
(2) composite fibre for obtaining step (1), is mixed with SEBS, POE, PP, base oil and auxiliary agent, is added to twin-screw and is squeezed
Go out granulating and forming in machine, obtain the TPE material.
9. preparation method according to claim 8, it is characterised in that step (1) mixing is carried out under agitation；
Preferably, the rotating speed of the stirring is 2000~5000rpm；
Preferably, the time of the stirring is 1~3h；
Preferably, step (2) mixing is carried out under agitation；
Preferably, the rotating speed of the stirring is 800~1500rpm；
Preferably, the time of the stirring is 20~60min；
Preferably, the feeding section temperature that double screw extruder is set in step (2) is 170~190 DEG C；
Preferably, the mixing section temperature that double screw extruder is set in step (2) is 200~220 DEG C；
Preferably, the extruding zone temperature that double screw extruder is set in step (2) is 230~250 DEG C；
Preferably, the head temperature that double screw extruder is set in step (2) is 220~230 DEG C.
A kind of 10. application of the heat sink material described in any one of claim 1-7, it is characterised in that the heat sink material application
In intelligent electronic device, new-energy automobile or aerospace field.
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| CN114423816A (en) * | 2019-09-23 | 2022-04-29 | 阿莫绿色技术有限公司 | Radio frequency heat dissipation plastic, preparation method thereof and repeater box body using radio frequency heat dissipation plastic |
| CN114806019A (en) * | 2022-05-27 | 2022-07-29 | 河北工业大学 | Composite die material based on high polymer and preparation method thereof |
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