CN112812435A - Normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and preparation method thereof - Google Patents

Normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and preparation method thereof Download PDF

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CN112812435A
CN112812435A CN202110041949.6A CN202110041949A CN112812435A CN 112812435 A CN112812435 A CN 112812435A CN 202110041949 A CN202110041949 A CN 202110041949A CN 112812435 A CN112812435 A CN 112812435A
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temperature
flame
composite material
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heat
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丁鹏
陈风青
王金合
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University of Shanghai for Science and Technology
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Abstract

The invention discloses a normal-temperature heat-conducting high-temperature flame-retardant polymer composite material which is characterized by being prepared from the following components in parts by mass: 75-80 parts of thermoplastic polymer resin, 15-20 parts of intumescent flame retardant, 0.1-5 parts of synergistic flame retardant and 0.1-5 parts of heat-conducting filler. The invention also discloses a preparation method of the thermoplastic polymer composite material, which is characterized in that the thermoplastic polymer resin, the intumescent flame retardant, the synergistic flame retardant and the heat-conducting filler are uniformly mixed, and the thermoplastic polymer composite material with excellent normal-temperature heat-conducting high-temperature flame-retardant performance is obtained through melt blending, extrusion, granulation and drying. According to the invention, by synchronously improving the formula and the preparation process, the material has the characteristics of good compatibility and multiple functions, so that the prepared composite material has excellent heat-conducting property at normal temperature and good flame retardant property at high temperature. The oxygen index of the composite material can reach 40.5 percent, the flame retardant grade can reach V-0 grade of UL-94, and the heat-conducting property of the composite material at normal temperature can reach 1.34W/m‑1k‑1。

Description

Normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and preparation method thereof
Technical Field
The invention belongs to the field of heat-conducting flame-retardant polymer composite materials, and particularly relates to a normal-temperature heat-conducting high-temperature flame-retardant thermoplastic polymer composite material and a preparation method thereof.
Background
The high integration and miniaturization of electronic devices make a fast and efficient thermal management system a technical guarantee for stable operation and long service life. Polymer-based thermally conductive composites (PTCs) are the first choice of thermally conductive materials for thermal management systems due to their light weight, insulation, corrosion resistance, high sealing, and ease of processing. In addition, the polymer material is one of three materials generally used in people's life, however, most of the polymer materials are flammable or combustible, the limit oxygen index is more than 21%, and a large amount of toxic gas and smoke are generated in the combustion process, so that frequent fire hazard and serious life and property loss are brought, and the problem of flame retardance of the polymer material is more and more emphasized by countries in the world. However, the research on the PTCs materials mainly focuses on the improvement of the thermal conductivity of the materials, but the attention on the aggravated fire hazard is insufficient. Therefore, the development of PTCs materials with high thermal conductivity and high flame retardant properties is an urgent need in the electronic industry.
In the prior art, chinese patent document CN201310001028.2 discloses a heat conduction composite material and a manufacturing method thereof, the composite material includes: a high molecular polymer comprising a high molecular material capable of radical reaction and a peroxide capable of radical-polymerizing the high molecular material; a thermally conductive filler comprising at least two thermally conductive materials compatible in nature; and the silicane substance at least comprises two different functional groups, one functional group can participate in the free radical polymerization reaction of the high molecular polymer, and the other functional group can generate chemical bonding on the surface of the heat-conducting filler. The invention has the effect of reducing contact thermal resistance and material thermal resistance. However, the technical scheme provided by the invention cannot meet the requirements of normal-temperature heat conduction and high-temperature flame retardance of electronic devices, and the materials can realize fewer functions.
The existing tin-based flame retardant, such as zinc stannate, zinc hydroxystannate and other flame retardants, has good flame retardance and smoke suppression performance in most polymers, can be widely used for flame retardance of high polymer materials such as polyolefin, polyvinyl chloride, polyester, epoxy resin, nylon, chlorinated rubber, alkyd resin and the like, is considered as one of high-efficiency green flame retardants, but as an inorganic flame retardant, the tin-based flame retardant has the defect of poor compatibility with a substrate, limits the application of the tin-based flame retardant, and is one of ways for solving the problem by modifying the tin-based flame retardant. Moreover, any tin-based flame retardant cannot achieve a good flame retardant effect when used alone, and is high in cost.
The high molecular polymer has solid thermal insulation property, the main method for improving the thermal conductivity is to add the heat-conducting filler, and the mainly added filler comprises carbon fiber, boron nitride, aluminum oxide and carbon materials such as graphene, expanded graphite, carbon nano tubes and the like; carbon fibers and boron nitride are resistant to high temperatures; the alumina has better high temperature resistance and heat conductivity; graphene is a single layer of graphite peeled from graphite, has excellent electrical conductivity, thermal conductivity, heat resistance, mechanical properties, and gas barrier properties, and plays a flame retardant role in the thermal decomposition of polymers. But the graphene has the defects that the development of a graphene flame retardant is hindered, strong van der Waals force exists between graphene layers and layers, and the graphene which is not subjected to surface treatment is easy to agglomerate to influence the dispersion of the graphene in a polymer; the interaction force between the stress-transferring material and the matrix is weak, and the stress cannot be effectively transferred; the amount of the flame retardant is also large to achieve the desired flame retardant effect. Therefore, synergistic flame retardancy and thermal conductivity between fillers are extremely important for multi-functionalized polymer composites.
At present, when the heat-conducting filler and the high polymer material are mixed, the compatibility between the materials is one of the problems which are difficult to solve.
Therefore, the development of a multifunctional polymer composite material with good compatibility between materials, simple preparation method and low cost, which is heat-conducting at normal temperature and flame-retardant at high temperature, is urgently needed to meet the demand.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material is characterized by being prepared from the following components in parts by mass:
Figure BDA0002895678120000021
the thermoplastic polymer resin is: polypropylene (PP), Polyethylene (PE), Polystyrene (PS), polybutylene succinate (PBS), polylactic acid (PLA), Polycaprolactone (PCL) or a combination thereof.
The synergistic flame retardant is a graphene oxide GO modified tin-based flame retardant, wherein the tin-based flame retardant is Zinc Stannate (ZS) or Zinc Hydroxystannate (ZHS).
In the graphene oxide GO modified tin-based flame retardant, GO is graphene oxide slurry.
The graphene oxide GO modified tin-based flame retardant is prepared by the following steps:
1) drying the graphene oxide slurry with a set amount in a 60 ℃ oven, and cutting into small pieces;
2) mixing a set amount of tin-based oxide and GO fragments together, and grinding for half an hour on a ball mill;
3) after the surface of the tin-based oxide is wrapped by the oxidized graphene fragments, putting the mixture into an oven to be dried for 2 hours at the temperature of 60 ℃;
4) and finally, obtaining a mixture, namely the graphene oxide modified tin-based oxide synergistic flame retardant.
The graphene oxide modified tin-based oxide and the heat-conducting filler are both used for constructing a three-dimensional heat-conducting/flame-retardant unit microstructure with mutually crosslinked interiors so as to improve the heat-conducting/flame-retardant performance of the composite material.
The intumescent flame retardant is prepared from a gas source and an acid source according to the weight ratio of 1: 4 in a mass ratio.
The gas source is melamine; the acid source is ammonium polyphosphate.
The heat-conducting filler is as follows: one or a combination of carbon fiber, expanded graphite, boron nitride, graphene and aluminum oxide.
The preparation method of the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material is characterized by comprising the following steps of:
1) preparing raw material components according to a set proportion;
2) drying the prepared raw material components in an oven at the temperature of 60-100 ℃ for 12 hours;
3) weighing thermoplastic polymer resin, the graphene oxide modified tin-based oxide synergistic with the flame retardant, the intumescent flame retardant and the heat-conducting filler according to the proportion, and mixing for 10-30 minutes in a high-speed mixer to uniformly mix the materials to obtain a mixture;
4) melting and blending the obtained mixture in an extruder, extruding, granulating, drying and tabletting to obtain the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material; the working parameters of the extruder are as follows: the temperature is 160-200 ℃, and the rotating speed is 60-80 rpm.
The invention has the beneficial effects that:
(1) according to the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and the preparation method thereof, provided by the invention, through synchronous improvement of the formula and the preparation process, the material has the characteristics of good compatibility and multiple functions, so that the prepared composite material has excellent heat-conducting property at normal temperature and good flame-retardant property at high temperature.
(2) The graphene oxide modified tin-based oxide synergistic flame-retardant high-molecular polymer composite material provided by the invention has excellent heat-conducting property at normal temperature, and simultaneously has better flame-retardant property at high temperature, and plays a role in suppressing smoke and weakening toxicity. According to the invention, the tin-based flame retardant and other flame retardants are adopted for synergetic flame retardance, so that the flame retardant property of the polymer is obviously improved; meanwhile, the specially prepared graphene oxide modified tin-based oxide synergistic flame retardant method has the characteristics of simplicity and environmental friendliness.
(3) The graphene oxide modified zinc stannate synergistic flame-retardant high-molecular polymer adopted by the invention not only improves the dispersibility of the graphene oxide in the matrix, but also improves the compatibility of tin-based oxide and the matrix, and the preparation method is simple, has low cost, saves time and is convenient for industrial production.
(4) The graphene oxide modified tin-based oxide and the heat-conducting filler are used for constructing the internal cross-linked three-dimensional heat-conducting/flame-retardant unit microstructure, and the normal-temperature heat-conducting/high-temperature flame-retardant performance of the composite material is improved by constructing a plurality of cross-linked three-dimensional heat-conducting/flame-retardant unit microstructures for heat management.
(5) The oxygen index of the composite material provided by the invention can reach 40.5%, the high-temperature flame retardant rating can reach V-0 rating of UL-94, and the normal-temperature heat-conducting property of the composite material can reach 1.34W/m-1k-1。
(6) The invention provides a normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and a preparation method thereof, wherein graphene oxide modified tin-based oxide improves the compatibility of the tin-based oxide and a matrix, improves the dispersibility of graphene oxide, and simultaneously plays a role in flame retardance and heat conduction in cooperation with a flame retardant and a heat-conducting filler.
Drawings
FIG. 1 is a schematic diagram showing the comparison of thermal conductivity coefficients of various embodiments of the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material of the present invention;
FIG. 2 is a schematic diagram showing the comparison of limiting oxygen indexes of various embodiments of the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material of the present invention.
Detailed Description
The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material provided by the embodiment of the invention is prepared from the following components in parts by mass:
Figure BDA0002895678120000041
the thermoplastic polymer resin is: polypropylene (PP), Polyethylene (PE), Polystyrene (PS), polybutylene succinate (PBS), polylactic acid (PLA), Polycaprolactone (PCL) or a combination thereof.
The synergistic flame retardant is a graphene oxide GO modified tin-based flame retardant, wherein the tin-based flame retardant is Zinc Stannate (ZS) or Zinc Hydroxystannate (ZHS).
In the graphene oxide GO modified tin-based flame retardant, GO is graphene oxide slurry.
The graphene oxide GO modified tin-based flame retardant is prepared by the following steps:
1) drying the graphene oxide slurry with a set amount in a 60 ℃ oven, and cutting into small pieces;
2) mixing a set amount of tin-based oxide and GO fragments together, and grinding for half an hour on a ball mill;
3) after the surface of the tin-based oxide is wrapped by the oxidized graphene fragments, putting the mixture into an oven to be dried for 2 hours at the temperature of 60 ℃;
4) and finally, obtaining a mixture, namely the graphene oxide modified tin-based oxide synergistic flame retardant.
The graphene oxide modified tin-based oxide and the heat-conducting filler are both used for constructing a three-dimensional heat-conducting/flame-retardant unit microstructure with mutually crosslinked interiors so as to improve the heat-conducting/flame-retardant performance of the composite material.
The intumescent flame retardant is prepared from a gas source and an acid source according to the weight ratio of 1: 4 in a mass ratio.
The gas source is melamine; the acid source is ammonium polyphosphate.
The heat-conducting filler is as follows: one or a combination of carbon fiber, expanded graphite, boron nitride and alumina.
The preparation method of the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material is characterized by comprising the following steps of:
1) preparing raw material components according to a set proportion;
2) drying the prepared raw material components in an oven at the temperature of 60-100 ℃ for 12 hours;
3) weighing thermoplastic polymer resin, the graphene oxide modified tin-based oxide synergistic with the flame retardant, the intumescent flame retardant and the heat-conducting filler according to the proportion, and mixing for 10-30 minutes in a high-speed mixer to uniformly mix the materials to obtain a mixture;
4) melting and blending the obtained mixture in an extruder, extruding, granulating, drying and tabletting to obtain the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material; the working parameters of the extruder are as follows: the temperature is 160-200 ℃, and the rotating speed is 60-80 rpm.
The specific formula of the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material of each specific embodiment of the invention is shown in table 1.
Specific example 1:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material provided by the embodiment of the invention is prepared from the following components in parts by mass: a thermoplastic polymer resin (polypropylene (PP)) 80; intumescent flame retardants 15 (melamine 3, ammonium polyphosphate 12); 0.1 of synergistic flame retardant (GO modified tin-based oxide, Zinc Stannate (ZS)); a heat conductive filler (carbon fiber) 5.
The preparation method comprises the following steps: 80g of resin, 3g of melamine, 12g of ammonium polyphosphate, 0.1g of GO modified tin-based oxide and 5g of heat-conducting filler (carbon fiber) are prepared and weighed respectively, and are placed in an oven at 60-100 ℃ for drying for 12 hours; and then mixing the materials in a high-speed mixer for 10-30 minutes, melting, blending and extruding the mixture in an extruder, controlling the temperature to be 160-200 ℃ and the rotating speed to be 60-80 rpm, and obtaining the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material.
In the graphene oxide GO modified tin-based flame retardant, GO is graphene oxide slurry.
The graphene oxide GO modified tin-based flame retardant is prepared by the following steps:
1) drying the graphene oxide slurry with a set amount in a 60 ℃ oven, and cutting into small pieces;
2) mixing a set amount of tin-based oxide and GO fragments together, and grinding for half an hour on a ball mill;
3) after the surface of the tin-based oxide is wrapped by the oxidized graphene fragments, putting the mixture into an oven to be dried for 2 hours at the temperature of 60 ℃;
4) and finally, obtaining a mixture, namely the graphene oxide modified tin-based oxide synergistic flame retardant.
The graphene oxide modified tin-based oxide and the heat-conducting filler are both used for constructing a three-dimensional heat-conducting/flame-retardant unit microstructure with mutually crosslinked interiors so as to improve the heat-conducting/flame-retardant performance of the composite material.
The intumescent flame retardant is prepared from a gas source and an acid source according to the weight ratio of 1: 4 in a mass ratio.
The gas source is melamine; the acid source is ammonium polyphosphate.
The standard specimens of the materials prepared in this example were subjected to limiting oxygen index test, UL-94 vertical burning test and thermal conductivity test, and the results are shown in Table 1.
Specific example 2:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and the preparation method thereof provided by the specific embodiment of the invention are basically the same as the embodiment 1, and the difference is that:
weighing 80g of PE resin, 3g of melamine, 12g of ammonium polyphosphate, 1g of GO modified tin-based oxide (zinc hydroxystannate (ZHS)), and 4g of heat-conducting filler (a 1:1 composition of carbon fiber and expanded graphite) and placing in an oven at 60-100 ℃ for drying for 12 hours. Then mixing the materials in a high-speed mixer for 10-30 minutes, melting and blending the mixture in an extruder, extruding, controlling the temperature at 160-200 ℃ and the rotating speed at 60-80 rpm to obtain the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material
The standard sample strips of the composite material were subjected to limiting oxygen index test, UL-94 vertical burning test and thermal conductivity test, and the results are shown in Table 1.
Specific example 3:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and the preparation method thereof provided by the specific embodiment of the invention are basically the same as the embodiments 1 and 2, and the difference is as follows:
weighing 80g of Polystyrene (PS) resin, 3g of melamine, 12g of ammonium polyphosphate, 3g of GO modified tin-based oxide and 2g of expanded graphite heat-conducting filler, and placing the materials in an oven at 60-100 ℃ for drying for 12 hours. Then mixing the materials in a high-speed mixer for 10-30 minutes, melting and blending the mixture in an extruder, extruding, controlling the temperature at 160-200 ℃ and the rotating speed at 60-80 rpm to obtain the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material
The standard sample strips of the composite material were subjected to limiting oxygen index test, UL-94 vertical burning test and thermal conductivity test, and the results are shown in Table 1.
Specific example 4:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and the preparation method thereof provided by the specific embodiment of the invention are basically the same as those of the embodiments 1-3, and the differences are as follows:
weighing 80g of polybutylene succinate (PBS) resin, 3g of melamine, 12g of ammonium polyphosphate, 5g of GO modified tin-based oxide and 0.1g of heat-conducting filler boron nitride, and placing in a drying oven at 60-100 ℃ for drying for 12 h. And then mixing the materials in a high-speed mixer for 10-30 minutes, melting, blending and extruding the mixture in an extruder, controlling the temperature to be 160-200 ℃ and the rotating speed to be 60-80 rpm, and obtaining the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material.
The standard sample strips of the composite material were subjected to limiting oxygen index test, UL-94 vertical burning test and thermal conductivity test, and the results are shown in Table 1.
Specific example 5:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and the preparation method thereof provided by the specific embodiment of the invention are basically the same as those of the embodiments 1 to 4, and the differences are as follows:
weighing 75g of polylactic acid (PLA), 4g of melamine, 16g of ammonium polyphosphate, 0.1g of GO modified tin-based oxide and 5g of heat-conducting filler aluminum oxide, and drying in an oven at 60-100 ℃ for 12 hours. And then mixing the materials in a high-speed mixer for 10-30 minutes, melting, blending and extruding the mixture in an extruder, controlling the temperature to be 160-200 ℃ and the rotating speed to be 60-80 rpm, and obtaining the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material.
The standard sample strips of the composite material were subjected to limiting oxygen index test, UL-94 vertical burning test and thermal conductivity test, and the results are shown in Table 1.
Specific example 6:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and the preparation method thereof provided by the specific embodiment of the invention are basically the same as the embodiments 1-5, and the difference is as follows:
weighing 76g of Polycaprolactone (PCL) resin, 4g of melamine, 16g of ammonium polyphosphate, 1g of GO modified tin-based oxide and 4g of heat-conducting filler, and placing the materials in a drying oven at 60-100 ℃ for drying for 12 hours. And then mixing the materials in a high-speed mixer for 10-30 minutes, melting, blending and extruding the mixture in an extruder, controlling the temperature to be 160-200 ℃ and the rotating speed to be 60-80 rpm, and obtaining the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material.
The standard sample strips of the composite material were subjected to limiting oxygen index test, UL-94 vertical burning test and thermal conductivity test, and the results are shown in Table 1.
Specific example 7:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and the preparation method thereof provided by the specific embodiment of the invention are basically the same as those of the embodiments 1 to 6, and the difference is as follows:
weighing 77g of PP and PE mixed resin, 4g of melamine, 16g of ammonium polyphosphate, 3g of GO modified tin-based oxide and 2g of heat-conducting filler, and placing the materials in an oven at 60-100 ℃ for drying for 12 hours. And then mixing the materials in a high-speed mixer for 10-30 minutes, melting, blending and extruding the mixture in an extruder, controlling the temperature to be 160-200 ℃ and the rotating speed to be 60-80 rpm, and obtaining the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material.
The standard sample strips of the composite material were subjected to limiting oxygen index test, UL-94 vertical burning test and thermal conductivity test, and the results are shown in Table 1.
Example 8:
the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material and the preparation method thereof provided by the specific embodiment of the invention are basically the same as the embodiments 1 to 7, and the difference is that:
weighing 75g of mixed resin (1: 1) of PLA and PCL, 4g of melamine, 16g of ammonium polyphosphate, 5g of GO modified tin-based oxide and 0g of heat-conducting filler, and placing the mixture in an oven at 60-100 ℃ for drying for 12 hours. And then mixing the materials in a high-speed mixer for 10-30 minutes, melting, blending and extruding the mixture in an extruder, controlling the temperature to be 160-200 ℃ and the rotating speed to be 60-80 rpm, and obtaining the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material.
The standard sample strips of the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material prepared in each embodiment of the invention are subjected to a limit oxygen index test, a UL-94 vertical combustion test and a heat-conducting performance test, and the results are shown in Table 1.
Table 1: the specific formula of each example and the combustion and mechanical test results of the obtained flame-retardant thermoplastic polymer composite material are as follows:
Figure BDA0002895678120000081
as can be seen from table 1, the flame retardant property and the heat conductivity of the thermoplastic polymer resin can be significantly improved by the composite formula of the graphene oxide modified tin-based oxide, the intumescent flame retardant and the heat conductive filler in each embodiment of the invention, when the addition amount of the graphene oxide modified tin-based oxide is 3% and the addition amount of the heat conductive filler is 2%, the flame retardant property of the composite reaches V-0, the limiting oxygen index reaches 40.5%, and the heat conductivity reaches 1.34W/m-1k-1So that the heat conduction and the flame retardance of the polymer composite material can be realized at normal temperature.
According to the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material provided by the invention, the graphene oxide modified tin-based oxide improves the compatibility of the tin-based oxide and a matrix, improves the dispersibility of graphene oxide, and simultaneously plays a role in flame retardance and heat conduction in cooperation with a flame retardant and a heat-conducting filler.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material is characterized by being prepared from the following components in parts by mass:
Figure FDA0002895678110000011
2. the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material as claimed in claim 1, wherein the thermoplastic polymer resin is: polypropylene (PP), Polyethylene (PE), Polystyrene (PS), polybutylene succinate (PBS), polylactic acid (PLA), Polycaprolactone (PCL) or a combination thereof.
3. The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material as claimed in claim 1, wherein the synergistic flame retardant is graphene oxide GO modified tin-based flame retardant, wherein the tin-based flame retardant is Zinc Stannate (ZS) or Zinc Hydroxystannate (ZHS).
4. The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material as claimed in claim 3, wherein GO in the graphene oxide GO-modified tin-based flame retardant is graphene oxide slurry.
5. The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material according to any one of claims 3 to 4, wherein the graphene oxide GO modified tin-based flame retardant is prepared by the following steps:
1) drying the graphene oxide slurry with a set amount in a 60 ℃ oven, and cutting into small pieces;
2) mixing a set amount of tin-based oxide and GO fragments together, and grinding for half an hour on a ball mill;
3) after the surface of the tin-based oxide is wrapped by the oxidized graphene fragments, putting the mixture into an oven to be dried for 2 hours at the temperature of 60 ℃;
4) and finally, obtaining a mixture, namely the graphene oxide modified tin-based oxide synergistic flame retardant.
6. The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material according to any one of claims 3 to 5, wherein the graphene oxide modified tin-based oxide and the heat-conducting filler are used for constructing a three-dimensional heat-conducting/flame-retardant unit microstructure with mutually crosslinked inside so as to improve the heat-conducting/flame-retardant performance of the composite material.
7. The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material as claimed in claim 1, wherein the intumescent flame retardant is prepared from a gas source and an acid source according to the weight ratio of 1: 4 in a mass ratio.
8. The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material as claimed in claim 7, wherein the gas source is melamine; the acid source is ammonium polyphosphate.
9. The normal-temperature heat-conducting high-temperature flame-retardant polymer composite material as claimed in claim 1, wherein the heat-conducting filler is: one or a combination of carbon fiber, expanded graphite, boron nitride, graphene and aluminum oxide.
10. A preparation method of the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
1) preparing raw material components according to a set proportion;
2) drying the prepared raw material components in an oven at the temperature of 60-100 ℃ for 12 hours;
3) weighing thermoplastic polymer resin, the graphene oxide modified tin-based oxide synergistic with the flame retardant, the intumescent flame retardant and the heat-conducting filler according to the proportion, and mixing for 10-30 minutes in a high-speed mixer to uniformly mix the materials to obtain a mixture;
4) melting and blending the obtained mixture in an extruder, extruding, granulating, drying and tabletting to obtain the normal-temperature heat-conducting high-temperature flame-retardant polymer composite material; the working parameters of the extruder are as follows: the temperature is 160-200 ℃, and the rotating speed is 60-80 rpm.
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CN113185777A (en) * 2021-06-10 2021-07-30 中国科学院长春应用化学研究所 High-flame-retardant polypropylene foamed bead as well as preparation method and application thereof
CN113462083A (en) * 2021-07-14 2021-10-01 江苏浩博塑业有限公司 Novel high-flame-retardancy polypropylene polymer and preparation method thereof
CN114249968A (en) * 2022-01-19 2022-03-29 科恒高分子(广东)有限公司 Flame-retardant heat-conducting high-impact TPEE composition and preparation method thereof
CN114672221A (en) * 2022-04-07 2022-06-28 西南石油大学 Preparation method of BP @ ZHS-based ultrathin water-based expansion fireproof coating
CN114874541A (en) * 2022-04-15 2022-08-09 上海大学 Flame-retardant smoke-suppressing polymer composite material and preparation method thereof

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CN113185777A (en) * 2021-06-10 2021-07-30 中国科学院长春应用化学研究所 High-flame-retardant polypropylene foamed bead as well as preparation method and application thereof
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CN114672221A (en) * 2022-04-07 2022-06-28 西南石油大学 Preparation method of BP @ ZHS-based ultrathin water-based expansion fireproof coating
CN114672221B (en) * 2022-04-07 2022-11-29 西南石油大学 Preparation method of BP @ ZHS-based ultrathin water-based expansion fireproof coating
CN114874541A (en) * 2022-04-15 2022-08-09 上海大学 Flame-retardant smoke-suppressing polymer composite material and preparation method thereof
CN114874541B (en) * 2022-04-15 2023-11-17 上海大学 Flame-retardant smoke-suppressing polymer composite material and preparation method thereof

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