PPS heat conduction material and PPS multilayer composite heating plate material

Abstract

The invention relates to the technical field of high polymer materials, and particularly discloses a PPS heat conduction material and a PPS multilayer composite heating plate material. The PPS heat conduction material comprises the following raw material components in parts by weight: 50-100 parts of polyphenylene sulfide; 20 to 40 parts of boron nitride; 1-5 parts of a compatilizer; 0.1 to 1 part of an antioxidant; and 0.1-1 part of a lubricant. Researches show that the PPS heat-conducting material has a relatively good heat-conducting effect by adding the heat-conducting filler boron nitride; in addition, the PPS heat conduction material disclosed by the invention also has relatively good impact resistance. Therefore, the PPS multilayer composite heating plate material prepared from the PPS heat conduction material has important application value.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and particularly relates to a PPS thermal conductive material and a PPS multi-layer composite heating plate material. Background Art

[0002] With the increasing global demand for clean energy, lithium batteries, as an efficient and environmentally friendly energy storage device, have been widely used in many fields such as electric vehicles, portable electronic devices, and energy storage power stations. However, the performance of lithium batteries is relatively sensitive to temperature. Especially in low-temperature environments, their performance will be significantly affected. Under low-temperature conditions, the viscosity of the electrolyte inside the lithium battery increases, resulting in a decrease in the ion migration rate and an increase in the battery internal resistance. This will not only cause a significant decrease in the charge and discharge efficiency of the battery, prolong the charging time, but also significantly reduce the output power and capacity of the battery, seriously affecting the normal use of the device. For example, in the field of electric vehicles, the driving range of lithium batteries will be significantly shortened in low-temperature environments, bringing great inconvenience to users; in some devices that require high-power output, such as drones, the battery cannot provide enough power at low temperatures, which may cause the device to be unable to take off or operate normally. In addition, the long-term use of lithium batteries at low temperatures will also accelerate the aging and attenuation of the battery, shorten the service life of the battery, and increase the use cost. In order to address the performance problems of lithium batteries in low-temperature environments, it is usually necessary to heat the lithium batteries to maintain their working temperature within a suitable range.

[0003] At present, there are many problems with the existing lithium battery heating plates on the market. First of all, the heat generation performance of the heating material in the heating plate needs to be improved; in addition, the impact resistance of the heating material in the heating plate is insufficient and it is easily damaged by external force impacts, which also needs to be further improved. Summary of the Invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, the present invention provides a PPS thermal conductive material and a PPS multi-layer composite heating plate material.

[0005] The above technical problems to be solved by the present invention are realized through the following technical solutions:

[0006] The present invention first provides a PPS thermal conductive material, which comprises the following raw material components in parts by weight: 50-100 parts of polyphenylene sulfide; 20-40 parts of boron nitride; 1-5 parts of compatibilizer; 0.1-1 part of antioxidant; 0.1-1 part of lubricant.

[0007] The present invention provides a brand-new PPS thermal conductive material. Research shows that the PPS thermal conductive material of the present invention has good thermal conductivity by adding the thermal conductive filler boron nitride.

[0008] In addition, the inventors also found in their research that the PPS thermal conductive material described in the present invention also has good impact resistance.

[0009] Preferably, the thermal conductive material comprises the following raw material components in parts by weight: 60 - 70 parts of polyphenylene sulfide; 25 - 35 parts of boron nitride; 3 - 5 parts of compatibilizer; 0.5 - 1 part of antioxidant; 0.5 - 1 part of lubricant.

[0010] Most preferably, the thermal conductive material comprises the following raw material components in parts by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer; 0.5 part of antioxidant; 0.5 part of lubricant.

[0011] Preferably, the boron nitride is modified boron nitride;

[0012] The modified boron nitride is prepared by the following method:

[0013] (1) Clean and dry the boron nitride to obtain the purified boron nitride;

[0014] (2) Add the purified boron nitride to a solution containing a modifier, stir for 4 - 8 h and then filter. Take the solid and dry it to obtain the modified boron nitride.

[0015] The inventors further found in their research that adding the modified boron nitride prepared by the above method to the PPS thermal conductive material of the present invention helps to improve the thermal conductivity and impact strength of the PPS thermal conductive material compared to adding unmodified boron nitride.

[0016] Preferably, the cleaning in step (1) specifically refers to cleaning the boron nitride with an aqueous hydrochloric acid solution having a mass fraction of 5 - 15%.

[0017] Most preferably, the cleaning in step (1) specifically refers to cleaning the boron nitride with an aqueous hydrochloric acid solution having a mass fraction of 10%.

[0018] Preferably, the weight ratio of the purified boron nitride to the solution containing the modifier in step (2) is 1:5 - 10.

[0019] Most preferably, the weight ratio of the purified boron nitride to the solution containing the modifier in step (2) is 1:6.

[0020] Preferably, the solution containing the modifier in step (2) is prepared by the following method: Add the modifier to an aqueous ethanol solution, stir evenly to obtain the solution containing the modifier; the weight ratio of the modifier to the aqueous ethanol solution is 10 - 20:100.

[0021] Preferably, the aqueous ethanol solution specifically refers to an aqueous ethanol solution with a volume fraction of 95%.

[0022] Preferably, the modifier is 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride or isopropyltri(dodecylbenzenesulfonyl) titanate.

[0023] Preferably, the modifier consists of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltri(dodecylbenzenesulfonyl) titanate.

[0024] More preferably, the weight ratio of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltri(dodecylbenzenesulfonyl) titanate is 2-4:3-6:2-4.

[0025] Most preferably, the weight ratio of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltri(dodecylbenzenesulfonyl) titanate is 3:5:3.

[0026] The inventors found in the research that in the preparation process of modified boron nitride, the selection of the modifier is very crucial; when the modified boron nitride obtained by modifying with a modifier composed of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltri(dodecylbenzenesulfonyl) titanate at the same time, it can greatly improve the thermal conductivity and impact resistance of the PPS thermal conductive material. The modified boron nitride obtained by modifying with a modifier composed of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltri(dodecylbenzenesulfonyl) titanate at the same time can synergistically improve the thermal conductivity and impact resistance of the PPS thermal conductive material.

[0027] The inventors also found in the research that only the modified boron nitride obtained by modifying with a modifier composed of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltri(dodecylbenzenesulfonyl) titanate at the same time can greatly improve the thermal conductivity and impact resistance of the PPS thermal conductive material; however, the modified boron nitride obtained by modifying with any two of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltri(dodecylbenzenesulfonyl) titanate alone cannot greatly improve the thermal conductivity and impact resistance of the PPS thermal conductive material.

[0028] The present invention also provides a PPS multi-layer composite heating plate material, and the PPS multi-layer composite heating plate material sequentially includes a first thermal conductive layer, a heating layer and a second thermal conductive layer from top to bottom.

[0029] Preferably, the first thermal conductive layer and the second thermal conductive layer are made of the PPS thermal conductive material according to any one of claims 1-5.

[0030] Preferably, the heating layer is prepared from polyphenylene sulfide, graphene, carbon nanotubes, carbon black, and silane coupling agent as raw materials.

[0031] Preferably, the thicknesses of the first heat-conducting layer and the second heat-conducting layer are 0.3 - 3.0 mm respectively; the thickness of the heating layer is 2 - 10 mm.

[0032] Preferably, the thicknesses of the first heat-conducting layer and the second heat-conducting layer are 1 mm respectively; the thickness of the heating layer is 3 mm.

[0033] Beneficial effects: The present invention provides a brand-new PPS heat-conducting material. Research shows that the PPS heat-conducting material of the present invention has good heat-conducting effect by adding heat-conducting filler boron nitride; in addition, the PPS heat-conducting material of the present invention also has good impact resistance. Therefore, it has important application value to prepare PPS multi-layer composite heating plate material by using the PPS heat-conducting material of the present invention. Specific embodiments

[0034] The following specific embodiments are used to further explain the present invention, but the embodiments do not limit the present invention in any form.

[0035] In the following embodiments, the polyphenylene sulfide used is polyphenylene sulfide with the brand name A900 produced by Toray of Japan; for the remaining raw materials without specified sources, they are all conventional raw materials that those skilled in the art can obtain through regular purchase channels.

[0036] Example 1 Preparation of PPS heat-conducting material

[0037] Composition of raw materials by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer (maleic anhydride grafted SEBS); 0.5 part of antioxidant (antioxidant 168); 0.5 part of lubricant (calcium stearate).

[0038] Preparation method: Mix the above-mentioned parts by weight of polyphenylene sulfide, boron nitride, compatibilizer, antioxidant, and lubricant evenly, and then melt and extrude them through a twin-screw extruder to obtain the PPS heat-conducting material.

[0039] Example 2 Preparation of PPS heat-conducting material

[0040] Composition of raw materials by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer (maleic anhydride grafted SEBS); 0.5 part of antioxidant (antioxidant 168); 0.5 part of lubricant (calcium stearate).

[0041] The boron nitride is modified boron nitride; the modified boron nitride is prepared by the following method:

[0042] (1) Clean the boron nitride with an aqueous hydrochloric acid solution with a mass fraction of 10%, and then dry it at 100 °C for 6 hours to obtain the purified boron nitride;

[0043] (2) Add the purified boron nitride to a solution containing a modifier, stir for 6 h, filter, and dry the solid to obtain the modified boron nitride; wherein, the weight ratio of the purified boron nitride to the solution containing the modifier is 1:6;

[0044] The solution containing the modifier described in step (2) is prepared by the following method: Add the modifier to an aqueous ethanol solution, stir evenly to obtain the solution containing the modifier; the weight ratio of the modifier to the aqueous ethanol solution is 15:100; the aqueous ethanol solution specifically refers to an aqueous ethanol solution with a volume fraction of 95%; the modifier is 3-aminopropyltriethoxysilane.

[0045] Preparation method: Mix the above-mentioned parts by weight of polyphenylene sulfide, boron nitride, compatibilizer, antioxidant, and lubricant evenly, and then melt and extrude through a twin-screw extruder to obtain the PPS thermal conductive material.

[0046] Preparation of PPS Thermal Conductive Material in Example 3

[0047] Composition of raw materials by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer (maleic anhydride grafted SEBS); 0.5 part of antioxidant (antioxidant 168); 0.5 part of lubricant (calcium stearate).

[0048] The boron nitride described above is modified boron nitride; the modified boron nitride is prepared by the following method:

[0049] (1) Clean the boron nitride with an aqueous hydrochloric acid solution with a mass fraction of 10%, and then dry it at 100 °C for 6 hours to obtain the purified boron nitride;

[0050] (2) Add the purified boron nitride to a solution containing a modifier, stir for 6 h, filter, and dry the solid to obtain the modified boron nitride; wherein, the weight ratio of the purified boron nitride to the solution containing the modifier is 1:6;

[0051] The solution containing the modifier described in step (2) is prepared by the following method: Add the modifier to an aqueous ethanol solution, stir evenly to obtain the solution containing the modifier; the weight ratio of the modifier to the aqueous ethanol solution is 15:100; the aqueous ethanol solution specifically refers to an aqueous ethanol solution with a volume fraction of 95%; the modifier is octadecyldimethylbenzylammonium chloride.

[0052] Preparation method: The above-mentioned parts by weight of polyphenylene sulfide, boron nitride, compatibilizer, antioxidant and lubricant are mixed evenly and then melt-extruded by a twin-screw extruder to obtain the PPS thermal conductive material.

[0053] Preparation of PPS Thermal Conductive Material in Example 4

[0054] Composition of raw materials in parts by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer (maleic anhydride grafted SEBS); 0.5 part of antioxidant (antioxidant 168); 0.5 part of lubricant (calcium stearate).

[0055] The boron nitride is modified boron nitride; the modified boron nitride is prepared by the following method:

[0056] (1) Wash boron nitride with a hydrochloric acid aqueous solution with a mass fraction of 10%, and then dry it at 100 °C for 6 hours to obtain purified boron nitride;

[0057] (2) Add the purified boron nitride to a solution containing a modifier, stir for 6 h and then filter, and take the solid and dry it to obtain the modified boron nitride; among them, the weight ratio of the purified boron nitride to the solution containing the modifier is 1:6;

[0058] The solution containing the modifier in step (2) is prepared by the following method: Add the modifier to an ethanol aqueous solution, stir evenly to obtain the solution containing the modifier; the weight ratio of the modifier to the ethanol aqueous solution is 15:100; the ethanol aqueous solution specifically refers to an ethanol aqueous solution with a volume fraction of 95%; the modifier is isopropyl tris(dodecylbenzenesulfonyl) titanate.

[0059] Preparation method: The above-mentioned parts by weight of polyphenylene sulfide, boron nitride, compatibilizer, antioxidant and lubricant are mixed evenly and then melt-extruded by a twin-screw extruder to obtain the PPS thermal conductive material.

[0060] Preparation of PPS Thermal Conductive Material in Example 5

[0061] Composition of raw materials in parts by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer (maleic anhydride grafted SEBS); 0.5 part of antioxidant (antioxidant 168); 0.5 part of lubricant (calcium stearate).

[0062] The boron nitride is modified boron nitride; the modified boron nitride is prepared by the following method:

[0063] (1) Wash boron nitride with a hydrochloric acid aqueous solution with a mass fraction of 10%, and then dry it at 100 °C for 6 hours to obtain purified boron nitride;

[0064] (2) Add the purified boron nitride to the solution containing the modifier, stir for 6 h, then filter. Take the solid and dry it to obtain the modified boron nitride. The weight ratio of the purified boron nitride to the solution containing the modifier is 1:6.

[0065] The solution containing the modifier in step (2) is prepared by the following method: Add the modifier to the ethanol aqueous solution, stir evenly to obtain the solution containing the modifier. The weight ratio of the modifier to the ethanol aqueous solution is 15:100. The ethanol aqueous solution specifically refers to an ethanol aqueous solution with a volume fraction of 95%. The modifier is composed of 3-aminopropyltriethoxysilane, octadecyl dimethyl benzyl ammonium chloride, and isopropyl tris(dodecylbenzenesulfonyl) titanate with a weight ratio of 3:5:3.

[0066] Preparation method: Mix the above-mentioned parts by weight of polyphenylene sulfide, boron nitride, compatibilizer, antioxidant, and lubricant evenly, and then melt and extrude through a twin-screw extruder to obtain the PPS thermal conductive material.

[0067] Preparation of PPS Thermal Conductive Material in Example 6

[0068] Composition of raw materials by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer (maleic anhydride grafted SEBS); 0.5 part of antioxidant (antioxidant 168); 0.5 part of lubricant (calcium stearate).

[0069] The boron nitride is modified boron nitride. The modified boron nitride is prepared by the following method:

[0070] (1) Wash the boron nitride with a hydrochloric acid aqueous solution with a mass fraction of 10%, and then dry it at 100 °C for 6 hours to obtain the purified boron nitride.

[0071] (2) Add the purified boron nitride to the solution containing the modifier, stir for 6 h, then filter. Take the solid and dry it to obtain the modified boron nitride. The weight ratio of the purified boron nitride to the solution containing the modifier is 1:6.

[0072] The solution containing the modifier in step (2) is prepared by the following method: Add the modifier to the ethanol aqueous solution, stir evenly to obtain the solution containing the modifier. The weight ratio of the modifier to the ethanol aqueous solution is 15:100. The ethanol aqueous solution specifically refers to an ethanol aqueous solution with a volume fraction of 95%. The modifier is composed of 3-aminopropyltriethoxysilane and octadecyl dimethyl benzyl ammonium chloride with a weight ratio of 3:5.

[0073] Preparation method: Mix the above-mentioned parts by weight of polyphenylene sulfide, boron nitride, compatibilizer, antioxidant, and lubricant evenly, and then melt and extrude them through a twin-screw extruder to obtain the PPS thermal conductive material.

[0074] Preparation of PPS Thermal Conductive Material in Example 7

[0075] Composition of raw materials by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer (maleic anhydride grafted SEBS); 0.5 part of antioxidant (antioxidant 168); 0.5 part of lubricant (calcium stearate).

[0076] The boron nitride mentioned above is modified boron nitride; the modified boron nitride is prepared by the following method:

[0077] (1) Wash boron nitride with an aqueous hydrochloric acid solution with a mass fraction of 10%, and then dry it at 100 °C for 6 hours to obtain purified boron nitride;

[0078] (2) Add the purified boron nitride to the solution containing the modifier, stir for 6 h, filter, and take the solid and dry it to obtain the modified boron nitride; among them, the weight ratio of the purified boron nitride to the solution containing the modifier is 1:6;

[0079] The solution containing the modifier in step (2) is prepared by the following method: Add the modifier to the ethanol aqueous solution, stir evenly to obtain the solution containing the modifier; the weight ratio of the modifier to the ethanol aqueous solution is 15:100; the ethanol aqueous solution specifically refers to an ethanol aqueous solution with a volume fraction of 95%; the modifier is composed of octadecyl dimethyl benzyl ammonium chloride and isopropyl tris(dodecylbenzenesulfonyl) titanate with a weight ratio of 5:3.

[0080] Preparation method: Mix the above-mentioned parts by weight of polyphenylene sulfide, boron nitride, compatibilizer, antioxidant, and lubricant evenly, and then melt and extrude them through a twin-screw extruder to obtain the PPS thermal conductive material.

[0081] Preparation of PPS Thermal Conductive Material in Example 8

[0082] Composition of raw materials by weight: 65 parts of polyphenylene sulfide; 30 parts of boron nitride; 4 parts of compatibilizer (maleic anhydride grafted SEBS); 0.5 part of antioxidant (antioxidant 168); 0.5 part of lubricant (calcium stearate).

[0083] The boron nitride mentioned above is modified boron nitride; the modified boron nitride is prepared by the following method:

[0084] (1) Wash boron nitride with an aqueous hydrochloric acid solution with a mass fraction of 10%, and then dry it at 100 °C for 6 hours to obtain purified boron nitride;

[0085] (2) Add the purified boron nitride to the solution containing the modifier, stir for 6 h and then filter. The solid obtained after drying is the modified boron nitride. The weight ratio of the purified boron nitride to the solution containing the modifier is 1:6.

[0086] The solution containing the modifier described in step (2) is prepared by the following method: Add the modifier to the ethanol aqueous solution, and stir evenly to obtain the solution containing the modifier. The weight ratio of the modifier to the ethanol aqueous solution is 15:100. The ethanol aqueous solution specifically refers to an ethanol aqueous solution with a volume fraction of 95%. The modifier is composed of 3-aminopropyltriethoxysilane and isopropyltris(dodecylbenzenesulfonyl) titanate with a weight ratio of 1:1.

[0087] Preparation method: Mix the above-mentioned parts by weight of polyphenylene sulfide, boron nitride, compatibilizer, antioxidant and lubricant evenly, and then melt and extrude through a twin-screw extruder to obtain the PPS thermal conductive material.

[0088] Refer to ASTM E1461-13(2022) standard to test the thermal conductivity of the PPS thermal conductive materials prepared in Examples 1-8; refer to ASTM D256-10 to test the notched Izod impact strength of the PPS thermal conductive materials prepared in Examples 1-8. The test results are shown in Table 1.

[0089] Table 1. Performance test results of the PPS thermal conductive material of the present invention

[0090]

[0091]

[0092] It can be seen from the experimental results in Table 1 that the thermal conductivity of the PPS thermal conductive material prepared in Example 1 reaches 1.62 W / m·K, and at the same time its notched Izod impact strength reaches 21.5 kJ / m 2 ; This shows that: the PPS thermal conductive material of the present invention has a good thermal conductivity effect by adding the thermal conductive filler boron nitride; at the same time, it also has good impact resistance.

[0093] It can be seen from the experimental results in Table 1 that the thermal conductivity and the notched Izod impact strength of the PPS thermal conductive materials prepared in Examples 2-4 are significantly improved compared with those of the PPS thermal conductive material prepared in Example 1. This shows that: adding the modified boron nitride prepared by the above method to the PPS thermal conductive material of the present invention is helpful to improve the thermal conductivity and impact strength of the PPS thermal conductive material compared with adding unmodified boron nitride.

[0094] As can be seen from the experimental results in Table 1, compared with the PPS thermal conductive material prepared in Example 1, the thermal conductivity and the notched Izod impact strength of the PPS thermal conductive material prepared in Example 5 have been greatly improved, and the improvement degree is much higher than that of the PPS thermal conductive materials prepared in Examples 2 to 4; this shows that: in the preparation process of the modified boron nitride, the selection of the modifier is very crucial; when the modified boron nitride is modified with a modifier composed of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltris(dodecylbenzenesulfonyl) titanate at the same time, it can greatly improve the thermal conductivity and impact resistance of the PPS thermal conductive material. The modified boron nitride modified with a modifier composed of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltris(dodecylbenzenesulfonyl) titanate at the same time can synergistically improve the thermal conductivity and impact resistance of the PPS thermal conductive material.

[0095] As can be seen from the experimental results in Table 1, compared with the PPS thermal conductive material prepared in Example 1, the thermal conductivity and the notched Izod impact strength of the PPS thermal conductive materials prepared in Examples 6 to 8 have not been greatly improved, and the improvement degree is comparable to that of the PPS thermal conductive materials prepared in Examples 2 to 4. This shows that: in the present invention, only the modified boron nitride modified with a modifier composed of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltris(dodecylbenzenesulfonyl) titanate at the same time can greatly improve the thermal conductivity and impact resistance of the PPS thermal conductive material; however, the modified boron nitride modified with any two of 3-aminopropyltriethoxysilane, octadecyldimethylbenzylammonium chloride and isopropyltris(dodecylbenzenesulfonyl) titanate cannot greatly improve the thermal conductivity and impact resistance of the PPS thermal conductive material.

[0096] Example 9 A PPS multi-layer composite heating plate material

[0097] The described PPS multi-layer composite heating plate material sequentially includes a first thermal conductive layer, a heating layer and a second thermal conductive layer from top to bottom; wherein, the thicknesses of the first thermal conductive layer and the second thermal conductive layer are both 1 mm; the thickness of the heating layer is 3 mm.

[0098] The described first thermal conductive layer and the second thermal conductive layer are made of the PPS thermal conductive material prepared in any one of Examples 1 to 8; the heating layer is made of polyphenylene sulfide, graphene, carbon nanotubes, carbon black and a silane coupling agent as raw materials.

[0099] Example 10 A PPS multi-layer composite heating plate material

[0100] The described PPS multi-layer composite heating plate material sequentially includes a first heat conduction layer, a heating layer, and a second heat conduction layer from top to bottom; wherein, the thicknesses of the first heat conduction layer and the second heat conduction layer are both 0.5 mm; the thickness of the heating layer is 10 mm.

[0101] The described first heat conduction layer and second heat conduction layer are made of the PPS heat conduction material prepared by any one of Examples 1 to 8; the heating layer is made of polyphenylene sulfide, graphene, carbon nanotubes, carbon black, and a silane coupling agent as raw materials.

Claims

1. A PPS thermal conductive material, characterized in that, It comprises the following raw material components in parts by weight: 50 - 100 parts of polyphenylene sulfide; 20 - 40 parts of boron nitride; 1 - 5 parts of compatibilizer; 0.1 - 1 part of antioxidant; 0.1 - 1 part of lubricant.

2. The PPS thermal conductive material according to claim 1, wherein The boron nitride described is modified boron nitride; The modified boron nitride is prepared by the following method: (1) Clean and dry the boron nitride to obtain the purified boron nitride; (2) Add the purified boron nitride into a solution containing a modifier, stir for 4 - 8 h and then filter. Take the solid and dry it to obtain the modified boron nitride.

3. The PPS thermal conductive material according to claim 2, wherein The cleaning in step (1) specifically refers to cleaning the boron nitride with an aqueous hydrochloric acid solution with a mass fraction of 5 - 15%; Most preferably, the cleaning in step (1) specifically refers to cleaning the boron nitride with an aqueous hydrochloric acid solution with a mass fraction of 10%.

4. The PPS thermal conductive material according to claim 2, wherein The solution containing a modifier in step (2) is prepared by the following method: Add the modifier into an aqueous ethanol solution, stir evenly to obtain the solution containing a modifier; the weight ratio of the modifier to the aqueous ethanol solution is 10 - 20:100; Preferably, the aqueous ethanol solution specifically refers to an aqueous ethanol solution with a volume fraction of 95%.

5. The PPS thermal conductive material according to claim 3, wherein The modifier is 3 - aminopropyltriethoxysilane, octadecyl dimethyl benzyl ammonium chloride or isopropyl tris(dodecylbenzenesulfonyl) titanate.

6. A PPS multi-layer composite heating plate material, characterized in that, It sequentially comprises a first heat - conducting layer, a heating layer and a second heat - conducting layer from top to bottom.

7. The PPS multi-layer composite heating plate material according to claim 6, characterized in that The first heat - conducting layer and the second heat - conducting layer are made of the PPS heat - conducting material according to any one of claims 1 - 5.

8. The PPS multi-layer composite heating plate material according to claim 6, characterized in that The heating layer is prepared from polyphenylene sulfide, graphene, carbon nanotubes, carbon black and a silane coupling agent as raw materials.

9. The PPS multi-layer composite heating plate material according to claim 6, characterized in that, The thicknesses of the first heat - conducting layer and the second heat - conducting layer are respectively 0.3 - 3.0 mm; the thickness of the heating layer is 2 - 10 mm.

10. The PPS multi-layer composite heating plate material according to claim 9, characterized in that, The thicknesses of the first heat - conducting layer and the second heat - conducting layer are respectively 1 mm; the thickness of the heating layer is 3 mm.

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