CN111187514A - Insulating and heat-conducting PPS composite material and preparation method thereof - Google Patents
Insulating and heat-conducting PPS composite material and preparation method thereof Download PDFInfo
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- CN111187514A CN111187514A CN201911416467.3A CN201911416467A CN111187514A CN 111187514 A CN111187514 A CN 111187514A CN 201911416467 A CN201911416467 A CN 201911416467A CN 111187514 A CN111187514 A CN 111187514A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L81/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
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- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/28—Nitrogen-containing compounds
- C08K2003/282—Binary compounds of nitrogen with aluminium
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Abstract
The invention discloses an insulationThe PPS composite material takes 80-100 parts of PPS resin particles as a base raw material, 30-80 parts of PTT resin particles with the same shape are matched to increase the addition content of a heat-conducting inorganic material, and the heat-conducting PPS composite material is matched with BaSO4SiC, AlN, BN and a dispersion compatilizer are mixed and formed into composite particles. Feeding the uniformly mixed raw materials into a double-screw extruder, setting the processing temperature to 245-310 ℃ and the screw rotation speed to 300-500 rpm, melting, mixing, homogenizing, extruding a melt trickle, transferring the melt trickle into an automatic conveying mesh belt machine, cooling, solidifying and molding the PPS composite material, and preparing particles through a granulator. By applying the PPS composite material and the preparation method thereof, the threshold value of the filled heat-conducting components is improved by introducing the PPT material, and meanwhile, the tightly-interwoven heat-conducting network is formed by combining the heat-conducting components in different forms in an optimized proportion, so that the heat-conducting property and the mechanical strength are improved.
Description
Technical Field
The invention relates to an insulating heat-conducting material, in particular to a PPS composite material for improving heat conductivity coefficient, insulation and mechanical properties and a preparation method thereof.
Background
With the application requirements of heat conduction, corrosion resistance, heat conduction, insulation and the like of materials in the fields of chemical engineering, energy, heating and heat exchange engineering, electronic information, electrical engineering, aerospace and the like, with the rising of industries such as LED, heat exchangers, 5G communication, new energy and the like, under the development trend of 'lightweight' and 'replacing steel with plastic', the existing metal materials and the like are difficult to meet the use conditions of the aspect, so that the polymer-based heat conduction functional composite material gradually becomes a hotspot for market and development at home and abroad, and the heat conduction plastic is more and more concerned. However, compared with metals and metal oxides, the thermal conductivity of polymer materials is relatively low, generally not more than 0.35, while the thermal conductivity of metals is as high as tens to hundreds, so that polymers need to be modified. The heat-conducting plastic is prepared by uniformly filling a polymer matrix material with a heat-conducting filler so as to improve the heat-conducting property of the heat-conducting plastic. Due to the factors of high price, immature process and the like of the structural polymer with high thermal conductivity coefficient, the preparation of the filled type thermal conductive polymer is a widely adopted method at present.
The main components of the heat-conducting plastic comprise a matrix material and a filler. Commonly used matrix materials include PA6, PA66, PA12, PA46, LCP, TPE, PC, PP, PPA, PPs, PEEK, and the like. The filler includes metal powder such as copper and aluminum, metal oxide such as aluminum oxide and beryllium oxide, nitride such as aluminum nitride and boron nitride, and inorganic nonmetal such as graphite, carbon black and carbon fiber.
At present, the existing heat conduction modification technology mainly comprises two types: one is insulation heat conduction by adding metal oxide Al2O3、MgO、SiO2Metal nitrides AlN, Si3N4BN and SiC, B4C3And the like. The filler particles are non-conductive particles, which results in insulation of the plastic. The thermal conductivity coefficient of the thermal conductive plastic is not high, and is generally about 1.5W/m.k. Another electrically and thermally conductive plastic, wherein the filler includes metal powder, fiber, graphite, carbon fiber, CNT, graphene, etc., and since this kind of filler belongs to electrically conductive particles, its corresponding thermally conductive plastic is also electrically conductive. The thermal conductivity coefficient of the thermal conductive plastic is higher and can generally reach more than 5.0W/m.k. The base materials of the two materials mainly comprise common plastics such as nylon (PA), polypropylene (PP), Polyester (PBT) and the like, and the heat conduction modification of the special plastic PPS is less.
At present, the heat conductivity coefficient of the existing insulating heat-conducting PPS material is low, generally not more than 1.5W/m.k, and the PPS material has poor mechanical properties, is difficult to produce and process and is difficult to popularize and apply widely.
Disclosure of Invention
The invention aims to provide an insulating and heat-conducting PPS composite material and a preparation method thereof, and solves the problem of improving the heat conductivity coefficient of the PPS material.
The technical solution of the present invention for achieving the above object is an insulating and heat conducting PPS composite material, characterized in that: 80-100 parts of PPS resin particles are taken as a base material, 30-80 parts of PTT resin particles with the same shape are matched to increase the addition content of heat-conducting inorganic materials, and the heat-conducting inorganic materials are mixed with BaSO4SiC, AlN, BN and a dispersion compatilizer are mixed and formed into composite particles.
Further, the BaSO4Is in the form of whisker and has the component content of 10-50 parts.
Further, the SiC is in a powder form, and the content of the components is 30-80 parts.
Further, the AlN is in a lamellar form, and the component content is 20-60 parts.
Further, the BN is in a fiber form, and the component content is 10-40 parts.
Further, the dispersion compatilizer comprises 10-30 parts of ethylene acrylic acid copolymer, 2-5 parts of silane coupling agent and 2-8 parts of maleic anhydride.
The invention also provides a preparation method of the insulating and heat-conducting PPS composite material, which is characterized by comprising the following steps:
s1, mixing the raw materials according to the component proportion, and stirring and uniformly mixing the raw materials at normal temperature, wherein the formula of the raw materials is as follows: 80-100 parts of PPS resin particles, 30-80 parts of PTT resin particles and 10-50 parts of BaSO4The material comprises 30-80 parts of a whisker, 30-80 parts of SiC powder, 20-60 parts of an AlN sheet layer, 10-40 parts of BN fiber, 10-30 parts of ethylene acrylic acid copolymer, 2-5 parts of a silane coupling agent and 2-8 parts of maleic anhydride;
s2, feeding the uniformly mixed raw materials into a double-screw extruder, setting the processing temperature to 245-310 ℃, the screw rotation speed to 300-500 rpm, melting, mixing and homogenizing, extruding melt trickle, and transferring the melt trickle to an automatic conveying mesh belt machine;
and S3, carrying out combined cooling of water mist spraying and air cooling on an automatic conveying mesh belt machine, solidifying and molding the PPS composite material, and preparing particles through a granulator.
The PPS composite material and the preparation method thereof have the advantages of prominent substantive characteristics and remarkable progress: the threshold value of the filled heat-conducting components is improved by introducing the PPT material, and meanwhile, the tightly-interwoven heat-conducting network is formed by combining the heat-conducting components in different forms in an optimized proportion, so that the heat-conducting performance and the mechanical strength are improved.
Detailed Description
The following detailed description is given with reference to the embodiments to make the technical solutions of the present invention easier to understand and grasp, so as to define the protection scope of the present invention more clearly.
In the process of designing and manufacturing the heat-insulating material for a long time, designers analyze and research the defects that the heat conductivity coefficient of the existing PPS material is low, the strips are difficult to form in the production and processing process of the heat-conducting PPS material, and the like, and develop and innovate an insulating heat-conducting PPS composite material and a preparation method thereof in order to meet the development trend of replacing steel with plastic and expand the application of special PPS material in heat-conducting injection molding finished products.
As understood from the composition summary of the PPS composite material, the PPS composite material comprises the following raw materials: polyphenylene Sulfide (PPS) particles, Polyester (PTT) particles, barium sulfate (BaSO)4) Whiskers, silicon carbide (SiC) powder, aluminum nitride (ALN) platelets, Boron Nitride (BN) fibers, dispersion compatibilising agents (maleic anhydride, silane coupling agents, ethylene acrylic copolymers).
The raw materials are counted by weight parts, and the forms and the use amounts of the components are as follows: 80-100 parts of PPS resin particles, 30-80 parts of PTT resin particles, and barium sulfate (BaSO)4) 10-50 parts of whiskers, 30-80 parts of silicon carbide (SiC) powder, 20-60 parts of aluminum nitride (ALN) sheet layers, 10-40 parts of Boron Nitride (BN) fibers, 10-30 parts of ethylene acrylic acid copolymers, 2-5 parts of silane coupling agents and 2-8 parts of maleic anhydride. Wherein the silicon carbide powder and the aluminum nitride sheet layer are in micro-nano level, and the boron nitride fiber is in micro-millimeter level short fiber.
On the basis of the above-mentioned raw material components, it is further understood from the summary of the preparation process of the PPS composite material: feeding the raw and auxiliary materials into a double-screw extruder according to corresponding parts, setting the processing temperature to be 245-310 ℃ and the screw rotating speed to be 300-500 rpm, melting, mixing, homogenizing and extruding, enabling the melt to fall into an automatic conveying mesh belt machine in a trickle manner, carrying out two combined cooling forming of water mist spray cooling and air cooling on the mesh belt machine, and preparing the high-performance insulating heat-conducting PPS composite particles with certain specification and size through a granulator.
From the summary of the raw material and auxiliary material components and the preparation method, the principle of improving the heat conductivity of the material can be understood as follows: the invention improves the filling heat conduction threshold value of the PPS material by adding the PTT material which can obviously improve the adding content of the heat conduction inorganic material, and simultaneously adopts three insulating materials of SiC, AlN and BN with high heat conduction, three different forms and proportions of powder, lamella and fiber are well combined, and the point, the line and the surface interact to form a closely connected heat conduction network in a PPS/PTT matrix, and the heat conduction network is mutually penetrated and interwoven to provide a good carrier channel for heat transfer, thereby obviously improving the heat conduction performance. In addition, the added silane coupling agent, maleic anhydride and ethylene acrylic acid copolymer can reduce the surface tension between PPS and PTT, promote the dispersion and compatibility of PPS, PTT and BaSO4, SiC, AlN and BN, increase the bonding force among the PPS, PTT and BaSO4, improve the thermal stability and uniformity, greatly improve the processing and forming performance of the material, have higher production efficiency, excellent performances such as mechanical strength, impact toughness and the like, and have higher heat conduction and heat dissipation effects.
For a more intuitive understanding of the above-mentioned PPS composite material preparation and molding process and the principle of the achieved technical effect, please refer to the following preferred embodiments.
The raw material and auxiliary material ratio is as follows: 100 parts of PPS resin particles, 40 parts of PTT resin particles, 20 parts of barium sulfate whiskers, 50 parts of silicon carbide powder, 40 parts of aluminum nitride sheet layers, 20 parts of boron nitride fibers, 10 parts of ethylene acrylic acid copolymer, 2 parts of silane coupling agent and 2 parts of maleic anhydride. And (2) putting the barium sulfate, silicon carbide and other heat-conducting filling materials and the dispersion compatilizer into a high-speed mixer together for mixing at normal temperature, feeding into a double screw through side feeding, setting the processing temperature to be 280 ℃ and the screw rotation speed to be 350rpm, and after melting, mixing, homogenizing and extruding, conveying to a granulator through an automatic conveying mesh belt machine at a matching speed, wherein the rotation speed of the granulator is 600 rpm. In order to test and detect the performance of the finished product particles of the composite material, a part of samples are firstly taken and put into a forced air drying oven, the treatment is carried out for 3 hours at 145 ℃, then the samples are added into an injection molding machine, the processing temperature is 280-300 ℃, the injection pressure is 50-80 MPa, and the glue injection time is 15 seconds. The prepared sample bars had the following test properties:
in summary, the detailed description of the embodiments of the present invention reveals the innovative essence of the technical solution of the present invention, and has many advantages that break through the current thermal insulation material: the threshold value of the filled heat-conducting components is improved by introducing the PPT material, and meanwhile, the tightly-interwoven heat-conducting network is formed by combining the heat-conducting components in different forms in an optimized proportion, so that the heat-conducting performance and the mechanical strength are improved.
Claims (7)
1. The utility model provides an insulating heat conduction PPS combined material which characterized in that: 80-100 parts of PPS resin particles are taken as a base material, 30-80 parts of PTT resin particles with the same shape are matched to increase the addition content of heat-conducting inorganic materials, and the heat-conducting inorganic materials are mixed with BaSO4SiC, AlN, BN and a dispersion compatilizer are mixed and formed into composite particles.
2. The PPS composite material as set forth in claim 1, wherein: the BaSO4Is in the form of whisker and has the component content of 10-50 parts.
3. The PPS composite material as set forth in claim 1, wherein: the SiC is in a powder form, and the content of the components is 30-80 parts.
4. The PPS composite material as set forth in claim 1, wherein: the AlN is in a lamellar form, and the component content is 20-60 parts.
5. The PPS composite material as set forth in claim 1, wherein: the BN is in a fiber form, and the content of the components is 10-40 parts.
6. The PPS composite material as set forth in claim 1, wherein: the dispersing compatilizer comprises 10-30 parts of ethylene acrylic acid copolymer, 2-5 parts of silane coupling agent and 2-8 parts of maleic anhydride.
7. A preparation method of an insulating heat-conducting PPS composite material is characterized by comprising the following steps:
s1, mixing the raw materials according to the component proportion, and stirring and uniformly mixing the raw materials at normal temperature, wherein the formula of the raw materials is as follows: 80-100 parts of PPS resin particles, 30-80 parts of PTT resin particles and 10-50 parts of BaSO4The material comprises 30-80 parts of a whisker, 30-80 parts of SiC powder, 20-60 parts of an AlN sheet layer, 10-40 parts of BN fiber, 10-30 parts of ethylene acrylic acid copolymer, 2-5 parts of a silane coupling agent and 2-8 parts of maleic anhydride;
s2, feeding the uniformly mixed raw materials into a double-screw extruder, setting the processing temperature to 245-310 ℃, the screw rotation speed to 300-500 rpm, melting, mixing and homogenizing, extruding melt trickle, and transferring the melt trickle to an automatic conveying mesh belt machine;
and S3, carrying out combined cooling of water mist spraying and air cooling on an automatic conveying mesh belt machine, solidifying and molding the PPS composite material, and preparing particles through a granulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911416467.3A CN111187514A (en) | 2019-12-31 | 2019-12-31 | Insulating and heat-conducting PPS composite material and preparation method thereof |
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| CN201911416467.3A CN111187514A (en) | 2019-12-31 | 2019-12-31 | Insulating and heat-conducting PPS composite material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292854A (en) * | 2021-04-13 | 2021-08-24 | 南京翌动新材料科技有限公司 | Preparation method of ceramic polymer composite material |
| CN116314404A (en) * | 2021-12-21 | 2023-06-23 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292854A (en) * | 2021-04-13 | 2021-08-24 | 南京翌动新材料科技有限公司 | Preparation method of ceramic polymer composite material |
| CN116314404A (en) * | 2021-12-21 | 2023-06-23 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
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