A high-cleanliness conductive enhanced modified polyphenylene ether material and its preparation method and application

Abstract

The present invention relates to the technical field of polymer materials, and specifically to a high-cleanliness conductive enhanced modified polyphenylene ether material and its preparation method and application. A high-cleanliness conductive enhanced modified polyphenylene ether material comprises the following raw materials in parts by weight: 50 to 60 parts of polyphenylene ether, 9 to 16 parts of high-impact polystyrene, 3 to 8 parts of ethylene-polytetrafluoroethylene copolymer, 1 to 3 parts of liquid crystal polymer, 0.2 to 1 part of toughening agent, 0.2 to 1 part of lubricant, 15 to 35 parts of graphene-modified wollastonite, and 0.1 to 0.5 parts of silane coupling agent. The modified polyphenylene ether material provided by the present invention has the advantages of good mechanical strength, high dimensional stability, good antistatic properties and high cleanliness, and can well meet the material requirements of IC trays.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a high-cleanliness conductive enhanced modified polyphenylene ether material and a preparation method and application thereof. Background Art

[0002] The chemical name of polyphenylene ether is poly-2,6-dimethyl-1,4-phenylene ether, referred to as PPO. IC trays are packaging trays used by semiconductor packaging and testing companies for their chip packaging and testing. Polyphenylene ether has important application value in IC tray preparation materials due to its high heat resistance, good mechanical properties and low water absorption.

[0003] However, unmodified polyphenylene ether (PPO) resin has poor solvent resistance, the products are prone to stress cracking, low notched impact strength, high melt viscosity, and extremely poor processing and molding properties, which greatly limits its application. By modifying polyphenylene ether with high-impact polystyrene (HIPS) to prepare PPO / HIPS, the fluidity of PPO can be improved, the processing temperature can be reduced, the toughness can be improved, and high strength and low water absorption can be maintained. However, with the vigorous development of the semiconductor field, higher requirements are placed on the performance of IC trays, requiring that the materials for preparing IC trays not only have high dimensional stability, mechanical properties and low water absorption, but also have good cleanliness and strong antistatic effect. Based on this, the present application aims to solve the above technical problems by studying the formula and preparation method of PPO / HIPS. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a high-cleanliness conductive enhanced modified polyphenylene ether material and its preparation method and application. The provided modified polyphenylene ether resin has the advantages of high dimensional stability, good mechanical properties, high cleanliness, and good antistatic effect, and can well meet the material requirements of IC trays.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] The first aspect of the present invention is to provide a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 50 to 60 parts of polyphenylene ether, 9 to 16 parts of high-impact polystyrene, 3 to 8 parts of ethylene-polytetrafluoroethylene copolymer, 1 to 3 parts of liquid crystal polymer, 0.2 to 1 part of toughening agent, 0.2 to 1 part of lubricant, 15 to 35 parts of graphene-modified wollastonite, and 0.1 to 0.5 parts of silane coupling agent;

[0007] Wherein, the preparation method of graphene-modified wollastonite comprises the following steps:

[0008] Step (1): adding graphene oxide to water, stirring and mixing thoroughly to prepare a graphene oxide dispersion having a concentration of 0.1 to 1%;

[0009] Step (2): adding wollastonite powder to water and stirring and dispersing the mixture, adding fatty alcohol polyoxyethylene ether thereto, and continuing stirring and dispersing the mixture to prepare a wollastonite dispersion; wherein the mass ratio of the wollastonite powder, fatty alcohol polyoxyethylene ether and water is 0.1-1:0.002-0.01:100, and the weight ratio of the wollastonite powder to the graphene oxide is 5-12:1;

[0010] Step (3): adding the graphene oxide dispersion to the wollastonite dispersion, mixing thoroughly, adding 80% hydrazine hydrate solution thereto, reacting at 50° C. to 90° C. for 1 h to 12 h, filtering, and drying to obtain graphene-modified wollastonite, wherein the mass ratio of the hydrazine hydrate solution to the graphene oxide in step (1) is 0.5 to 1:1.

[0011] The present invention adopts ethylene-polytetrafluoroethylene copolymer and liquid crystal high molecular polymer for blending modification on the basis of PPO / HIPS material. The ethylene-polytetrafluoroethylene copolymer has high toughness and extremely low friction coefficient, and the liquid crystal high molecular polymer has self-reinforcement, good thermal stability and excellent wear resistance, and can improve the mechanical properties and dimensional stability of PPO / HIPS, and improve the powder falling problem of finished product particles.

[0012] The present invention utilizes a graphene oxide dispersion liquid, fully mixes it with a wollastonite powder water dispersion liquid containing fatty alcohol polyoxyethylene ether, and then utilizes a reduction reaction to deposit graphene on the surface of the wollastonite powder to prepare graphene-modified wollastonite powder, and adds the graphene-modified wollastonite to a polyphenylene ether material. Meanwhile, the types and amounts of various raw materials are optimized, the raw materials have good compatibility, and the melt fluidity is high. The graphene-modified wollastonite is filled into the gaps of the polyphenylene ether resin, and the shrinkage rate of the material is reduced, thereby further improving the dimensional stability of the material. After the modification, the graphene on the surface of the wollastonite particles is not easy to stack, and the two-dimensional lattice structure has a very high electron mobility, which can play a role in enhancing conductivity. Moreover, the graphene has a low friction coefficient, and can well prevent the surface of the material from being rough and powdery, thereby giving the modified polyphenylene ether product good dimensional stability, antistatic property and cleanliness.

[0013] Further, the toughening agent is selected from at least one of hydrogenated styrene-butadiene block copolymer and core-shell structure toughening agent. Hydrogenated styrene-butadiene block copolymer is a linear triblock copolymer with polystyrene as the terminal segment and ethylene-butylene copolymer obtained by hydrogenating polybutadiene as the middle elastic block, which mainly toughens polyphenylene ether by improving the compatibility with polyphenylene ether. Core-shell structure toughening agents can reduce and offset external stress through the interface of the core-shell structure, thereby achieving a toughening effect. Furthermore, the present application uses equal masses of hydrogenated styrene-butadiene block copolymer and core-shell structure toughening agent E920 as toughening agents, and the toughening effect is excellent.

[0014] Furthermore, the liquid crystal polymer is a highly heat-resistant thermotropic liquid crystal polymer. Furthermore, the liquid crystal polymer used in the present application is the liquid crystal polymer Zenite 6130.

[0015] Furthermore, the lubricant is selected from at least one of fatty acid esters, stearic acid, fatty acid amides and stearates.

[0016] Furthermore, the silane coupling agent is selected from at least one of KH550, KH560, KH570, and KH792.

[0017] Furthermore, in the preparation method of graphene-modified wollastonite, the mesh size of the wollastonite powder used is 200-325 meshes.

[0018] Furthermore, in the preparation method of graphene-modified wollastonite, the fatty alcohol polyoxyethylene ether adopts C8-C16 alcohol polyoxyethylene ether.

[0019] The second object of the present invention is to provide a method for preparing the above-mentioned high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following steps:

[0020] Step 1: Add graphene-modified wollastonite in a high-speed mixer according to the formula amount, then add an anhydrous ethanol dilution of a silane coupling agent, mix thoroughly and evenly, dry and remove the diluent, and obtain graphene-modified wollastonite after surface treatment;

[0021] Step 2: Add polyphenylene ether, high impact polystyrene, ethylene-polytetrafluoroethylene copolymer, liquid crystal polymer, toughening agent, lubricant and surface treated graphene-modified wollastonite into a high-speed mixer according to the formula amount, and mix them thoroughly to obtain a premix;

[0022] Step 3: The uniformly mixed premix is ​​extruded through a twin-screw extruder, the plastic melt strands are cooled through a water trough, and granulated through a pelletizer to obtain a high-cleanliness conductive enhanced modified polyphenylene ether material.

[0023] Furthermore, in step 1, the volume ratio of the silane coupling agent to anhydrous ethanol is 1:4-8.

[0024] Further, in step 3, the temperatures of zones 1 to 11 of the twin-screw extruder are 220° C., 260° C., 280° C., 280° C., 280° C., 270° C., 260° C., 260° C., 270° C., 290° C., and 320° C. In combination with the extrusion process and the above-mentioned raw material characteristics, the above-mentioned temperatures are set, and the premix is ​​preheated, plasticized, and melt-mixed and extruded using a twin-screw extruder, so that the raw materials can be fully mixed to form a uniform melt, thereby ensuring the stability of the extrusion process and the quality of the final product.

[0025] The third object of the present invention is to provide the use of the above-mentioned high-cleanliness conductive enhanced modified polyphenylene ether material in the preparation of an IC tray.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the modified polyphenylene ether material provided by the present invention adopts ethylene-polytetrafluoroethylene copolymer and liquid crystal polymer for blending modification on the basis of PPO / HIPS material, adds graphene-modified wollastonite, and finally gives the modified polyphenylene ether product good mechanical strength, dimensional stability, antistatic property and cleanliness by adjusting the type and content of the auxiliary agent. The prepared modified polyphenylene ether material can well meet the material application requirements of IC trays. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The methods are conventional methods unless otherwise specified, and the raw materials can be obtained from public commercial channels unless otherwise specified.

[0029] Example 1

[0030] This embodiment provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 60 parts of polyphenylene ether, 12 parts of high-impact polystyrene, 8 parts of ethylene-polytetrafluoroethylene copolymer, 1 part of liquid crystal polymer, 0.2 parts of hydrogenated styrene-butadiene block copolymer, 0.3 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 15 parts of graphene-modified wollastonite, and 0.15 parts of silane coupling agent KH570;

[0031] The preparation method of the modified polyphenylene ether material is:

[0032] 1. Add graphene-modified wollastonite in a high-speed mixer according to the formula, and then add 5 times anhydrous ethanol dilution of silane coupling agent, mix well, dry and remove the diluent to obtain graphene-modified wollastonite after surface treatment;

[0033] 2. Add polyphenylene ether, high impact polystyrene, ethylene-polytetrafluoroethylene copolymer, liquid crystal polymer, toughening agent, lubricant and surface treated graphene-modified wollastonite into a high-speed mixer according to the formula amount, mix them thoroughly and evenly to obtain a premix;

[0034] 3. The uniformly mixed premix is ​​extruded through a twin-screw extruder, the plastic melt strands are cooled through a water trough, and granulated through a pelletizer to obtain a high-cleanliness conductive enhanced modified polyphenylene ether material. The temperatures of zones 1 to 11 of the twin-screw extruder are 220°C, 260°C, 280°C, 280°C, 280°C, 270°C, 260°C, 260°C, 270°C, 290°C, and 320°C, respectively.

[0035] Wherein, the preparation method of graphene-modified wollastonite is:

[0036] (1) adding graphene oxide to water, stirring and mixing thoroughly to prepare a graphene oxide dispersion with a concentration of 0.5%;

[0037] (2) adding 200 mesh wollastonite powder into water and stirring to disperse, adding C12 alcohol polyoxyethylene ether thereto, and continuing to stir and disperse to prepare a wollastonite dispersion, wherein the mass ratio of wollastonite powder, fatty alcohol polyoxyethylene ether and water is 0.5:0.005:100, and the weight ratio of wollastonite powder to graphene oxide is 9:1;

[0038] (3) The graphene oxide dispersion was added to the wollastonite dispersion, and after being fully mixed, 80% hydrazine hydrate solution was added thereto. The mixture was reacted at 85° C. for 2 h, filtered, and dried to obtain graphene-modified wollastonite. The mass ratio of the hydrazine hydrate solution to the graphene oxide was 0.8:1.

[0039] Example 2

[0040] This embodiment provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 60 parts of polyphenylene ether, 10 parts of high-impact polystyrene, 5 parts of ethylene-polytetrafluoroethylene copolymer, 3 parts of liquid crystal polymer, 0.2 parts of hydrogenated styrene-butadiene block copolymer, 0.3 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 18 parts of graphene-modified wollastonite, and 0.18 parts of silane coupling agent KH570;

[0041] The preparation method of the modified polyphenylene ether material and the preparation method of the graphene-modified wollastonite are the same as those in Example 1.

[0042] Example 3

[0043] This embodiment provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 57 parts of polyphenylene ether, 12 parts of high-impact polystyrene, 3 parts of ethylene-polytetrafluoroethylene copolymer, 1 part of liquid crystal polymer, 0.2 parts of hydrogenated styrene-butadiene block copolymer, 0.3 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 25 parts of graphene-modified wollastonite, and 0.25 parts of silane coupling agent KH570;

[0044] The preparation method of the modified polyphenylene ether material and the preparation method of graphene-modified wollastonite are the same as those in Example 1.

[0045] Example 4

[0046] This embodiment provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 54 parts of polyphenylene ether, 14 parts of high-impact polystyrene, 7 parts of ethylene-polytetrafluoroethylene copolymer, 3 parts of liquid crystal polymer, 0.5 parts of hydrogenated styrene-butadiene block copolymer, 0.5 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 25 parts of graphene-modified wollastonite, and 0.25 parts of silane coupling agent KH570;

[0047] The preparation method of the modified polyphenylene ether material and the preparation method of graphene-modified wollastonite are the same as those in Example 1.

[0048] Example 5

[0049] This embodiment provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 52 parts of polyphenylene ether, 12 parts of high-impact polystyrene, 7 parts of ethylene-polytetrafluoroethylene copolymer, 3 parts of liquid crystal polymer, 0.2 parts of hydrogenated styrene-butadiene block copolymer, 0.3 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 35 parts of graphene-modified wollastonite, and 0.35 parts of silane coupling agent KH570;

[0050] The preparation method of the modified polyphenylene ether material and the preparation method of graphene-modified wollastonite are the same as those in Example 1.

[0051] Example 6

[0052] This embodiment provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 52 parts of polyphenylene ether, 14 parts of high-impact polystyrene, 7 parts of ethylene-polytetrafluoroethylene copolymer, 3 parts of liquid crystal polymer, 0.1 parts of hydrogenated styrene-butadiene block copolymer, 0.5 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 25 parts of graphene-modified wollastonite, and 0.25 parts of silane coupling agent KH570;

[0053] The preparation method of the modified polyphenylene ether material and the preparation method of the graphene-modified wollastonite are the same as those in Example 1.

[0054] Example 7

[0055] This embodiment provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 54 parts of polyphenylene ether, 14 parts of high-impact polystyrene, 7 parts of ethylene-polytetrafluoroethylene copolymer, 3 parts of liquid crystal polymer, 1 part of hydrogenated styrene-butadiene block copolymer, 0.5 parts of pentaerythritol stearate, 25 parts of graphene-modified wollastonite, and 0.25 parts of silane coupling agent KH570;

[0056] The preparation method of the modified polyphenylene ether material and the preparation method of the graphene-modified wollastonite are the same as those in Example 1.

[0057] Example 8

[0058] This embodiment provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 54 parts of polyphenylene ether, 14 parts of high-impact polystyrene, 7 parts of ethylene-polytetrafluoroethylene copolymer, 3 parts of liquid crystal polymer, 1 part of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 25 parts of graphene-modified wollastonite, and 0.25 parts of silane coupling agent KH570;

[0059] The preparation method of the modified polyphenylene ether material and the preparation method of the graphene-modified wollastonite are the same as those in Example 1.

[0060] Example 9

[0061] The modified polyphenylene ether material formula and preparation method are the same as those in Example 1. The preparation method of graphene-modified wollastonite comprises the following steps:

[0062] (1) adding graphene oxide to water, stirring and mixing thoroughly to prepare a graphene oxide dispersion with a concentration of 0.5%;

[0063] (2) adding 325 mesh wollastonite powder to water and stirring and dispersing the mixture, adding C9 alcohol polyoxyethylene ether thereto, and continuing to stir and disperse the mixture to prepare a wollastonite dispersion, wherein the mass ratio of wollastonite powder, fatty alcohol polyoxyethylene ether and water is 1:0.01:100, and the weight ratio of wollastonite powder to graphene oxide is 8:1;

[0064] (3) The graphene oxide dispersion was added to the wollastonite dispersion, and after being fully mixed, 80% hydrazine hydrate solution was added thereto. The mixture was reacted at 85° C. for 2 h, filtered, and dried to obtain graphene-modified wollastonite. The mass ratio of the hydrazine hydrate solution to the graphene oxide was 0.8:1.

[0065] Comparative Example 1

[0066] This comparative example provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 60 parts of polyphenylene ether, 12 parts of high-impact polystyrene, 1 part of liquid crystal polymer, 0.2 parts of hydrogenated styrene-butadiene block copolymer, 0.3 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 15 parts of graphene-modified wollastonite, and 0.15 parts of silane coupling agent KH570; the preparation method of the modified polyphenylene ether material and the preparation method of the graphene-modified wollastonite are the same as those in Example 1.

[0067] Comparative Example 2

[0068] This comparative example provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 60 parts of polyphenylene ether, 12 parts of high-impact polystyrene, 8 parts of ethylene-polytetrafluoroethylene copolymer, 0.2 parts of hydrogenated styrene-butadiene block copolymer, 0.3 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 15 parts of graphene-modified wollastonite, and 0.15 parts of silane coupling agent KH570; the preparation method of the modified polyphenylene ether material and the preparation method of the graphene-modified wollastonite are the same as those in Example 1.

[0069] Comparative Example 3

[0070] The comparative example provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 60 parts of polyphenylene ether, 12 parts of high-impact polystyrene, 8 parts of ethylene-polytetrafluoroethylene copolymer, 1 part of liquid crystal polymer, 0.2 parts of hydrogenated styrene-butadiene block copolymer, 0.3 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 1.5 parts of graphene, 13.5 parts of wollastonite, and 0.15 parts of silane coupling agent KH570;

[0071] The preparation method of the modified polyphenylene ether material is:

[0072] 1. Add wollastonite in a high-speed mixer according to the formula, and then add 5 times anhydrous ethanol dilution of silane coupling agent, mix thoroughly and evenly, dry and remove the diluent to obtain surface-treated wollastonite;

[0073] 2. Add polyphenylene ether, high impact polystyrene, ethylene-polytetrafluoroethylene copolymer, liquid crystal polymer, toughening agent, lubricant, graphene and surface treated wollastonite into a high-speed mixer according to the formula amount, mix them thoroughly and evenly to obtain a premix;

[0074] 3. The uniformly mixed premix is ​​extruded through a twin-screw extruder, the plastic melt strands are cooled through a water trough, and granulated through a pelletizer to obtain a high-cleanliness conductive enhanced modified polyphenylene ether material. The temperatures of zones 1 to 11 of the twin-screw extruder are 220°C, 260°C, 280°C, 280°C, 280°C, 270°C, 260°C, 260°C, 270°C, 290°C, and 320°C, respectively.

[0075] Comparative Example 4

[0076] This comparative example provides a high-cleanliness conductive enhanced modified polyphenylene ether material, comprising the following raw materials in parts by weight: 60 parts of polyphenylene ether, 12 parts of high-impact polystyrene, 8 parts of ethylene-polytetrafluoroethylene copolymer, 1 part of liquid crystal polymer, 0.2 parts of hydrogenated styrene-butadiene block copolymer, 0.3 parts of core-shell structure toughening agent E920, 0.5 parts of pentaerythritol stearate, 1.5 parts of graphene, and 13.5 parts of wollastonite;

[0077] The preparation method of the modified polyphenylene ether material is:

[0078] 1. Add polyphenylene ether, high impact polystyrene, ethylene-polytetrafluoroethylene copolymer, liquid crystal polymer, toughening agent, lubricant, graphene and wollastonite into a high-speed mixer according to the formula, mix them thoroughly and evenly to obtain a premix;

[0079] 2. The uniformly mixed premix is ​​extruded through a twin-screw extruder, the plastic melt strands are cooled in a water trough, and granulated by a pelletizer to obtain a high-cleanliness conductive enhanced modified polyphenylene ether material. The temperatures of zones 1 to 11 of the twin-screw extruder are 220°C, 260°C, 280°C, 280°C, 280°C, 270°C, 260°C, 260°C, 270°C, 290°C, and 320°C, respectively.

[0080] The modified polyphenylene ether materials prepared in the examples and comparative examples were tested for performance, and the test results are shown in the following table:

[0081] Table 1: Performance test results of examples and comparative examples

[0082]

[0083] Table 1: Performance test results of the examples and comparative examples

[0084]

[0085] It can be seen from the above table that the modified polyphenylene ether materials prepared in Examples 1 to 9 of the present application have good mechanical strength, dimensional stability, antistatic properties, cleanliness, and low water absorption, and have excellent comprehensive performance.

[0086] Compared with Comparative Example 1, Example 1 of the present application does not add ethylene-polytetrafluoroethylene copolymer, and the tensile strength, tensile elongation, flexural strength and flexural modulus of the modified polyphenylene ether material are reduced. The mechanical properties of the modified polyphenylene ether material sample prepared in Comparative Example 1 are reduced, and the surface of the sample in Comparative Example 1 is rough and powdery, and the surface cleanliness of the sample is low.

[0087] Compared with Comparative Example 2, Example 1 of the present application does not add liquid crystal polymer to Comparative Example 2, and the tensile strength, tensile elongation, flexural strength and flexural modulus of the modified polyphenylene ether sample are reduced, and the shrinkage rate is increased. The mechanical properties of the modified polyphenylene ether material sample prepared in Comparative Example 2 are reduced, and the dimensional stability is deteriorated.

[0088] Compared with Example 3, Example 1 of the present application does not prepare graphene-modified wollastonite in Example 3. The mechanical properties of the modified polyphenylene ether sample prepared in Example 3 are reduced, the surface resistivity is significantly increased, and the antistatic effect is reduced. In addition, the surface of the sample in Example 3 is rough and powdery, and the surface cleanliness is reduced.

[0089] Compared with Comparative Example 4, Example 1 of the present application does not prepare graphene-modified wollastonite in Comparative Example 4, nor does it add silane coupling agent for modification. The mechanical properties of the modified polyphenylene ether sample prepared in Comparative Example 4 are reduced, the surface resistivity is significantly increased, and the antistatic effect is reduced. In addition, the surface of the sample in Comparative Example 4 is rough and powdery, and the surface cleanliness is reduced.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A highly clean conductive enhanced modified polyphenylene ether material, characterized in that: The invention comprises the following raw materials in parts by weight: 50 to 60 parts of polyphenylene ether, 9 to 16 parts of high impact polystyrene, 3 to 8 parts of ethylene-polytetrafluoroethylene copolymer, 1 to 3 parts of liquid crystal polymer, 0.2 to 1 part of toughening agent, 0.2 to 1 part of lubricant, 15 to 35 parts of graphene-modified wollastonite, and 0.1 to 0.5 parts of silane coupling agent; Wherein, the preparation method of graphene-modified wollastonite comprises the following steps: Step (1): adding graphene oxide to water, stirring and mixing thoroughly to prepare a graphene oxide dispersion having a concentration of 0.1 to 1%; Step (2): adding wollastonite powder to water and stirring and dispersing the mixture, adding fatty alcohol polyoxyethylene ether thereto, and continuing stirring and dispersing the mixture to prepare a wollastonite dispersion; wherein the mass ratio of the wollastonite powder, fatty alcohol polyoxyethylene ether and water is 0.1-1:0.002-0.01:100, and the weight ratio of the wollastonite powder to the graphene oxide is 5-12:1; Step (3): adding the graphene oxide dispersion to the wollastonite dispersion, mixing thoroughly, adding 80% hydrazine hydrate solution thereto, reacting at 50° C. to 90° C. for 1 h to 12 h, filtering, and drying to obtain graphene-modified wollastonite, wherein the mass ratio of the hydrazine hydrate solution to the graphene oxide in step (1) is 0.5 to 1:

1.

2. A highly clean conductive enhanced modified polyphenylene ether material according to claim 1, characterized in that: The toughening agent is selected from at least one of hydrogenated styrene-butadiene block copolymers and core-shell structure toughening agents.

3. A highly clean conductive enhanced modified polyphenylene ether material according to claim 1, characterized in that: The lubricant is selected from at least one of fatty acid esters, stearic acid, fatty acid amides and stearates.

4. The high-cleanliness conductive enhanced modified polyphenylene ether material according to claim 1, characterized in that: The silane coupling agent is selected from at least one of KH550, KH560, KH570, and KH792.

5. The high-cleanliness conductive enhanced modified polyphenylene ether material according to claim 1, characterized in that: In the preparation method of graphene-modified wollastonite, the mesh number of the wollastonite powder used is 200-325 meshes.

6. The high-cleanliness conductive enhanced modified polyphenylene ether material according to claim 1, characterized in that: In the preparation method of graphene-modified wollastonite, the fatty alcohol polyoxyethylene ether adopts C8-C16 alcohol polyoxyethylene ether.

7. The method for preparing a highly clean conductive enhanced modified polyphenylene ether material according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Add graphene-modified wollastonite in a high-speed mixer according to the formula amount, then add an anhydrous ethanol dilution of a silane coupling agent, mix thoroughly and evenly, dry and remove the diluent, and obtain graphene-modified wollastonite after surface treatment; Step 2: Add polyphenylene ether, high impact polystyrene, ethylene-polytetrafluoroethylene copolymer, liquid crystal polymer, toughening agent, lubricant and surface treated graphene-modified wollastonite into a high-speed mixer according to the formula amount, and mix them thoroughly to obtain a premix; Step 3: The uniformly mixed premix is ​​extruded through a twin-screw extruder, the plastic melt strands are cooled through a water trough, and granulated through a pelletizer to obtain a high-cleanliness conductive enhanced modified polyphenylene ether material.

8. The method for preparing a highly clean conductive enhanced modified polyphenylene ether material according to claim 7, characterized in that: In step 1, the volume ratio of the silane coupling agent to anhydrous ethanol is 1:4-8.

9. The method for preparing a highly clean conductive enhanced modified polyphenylene ether material according to claim 7, characterized in that: In step 3, the temperatures of zones 1 to 11 of the twin-screw extruder are 220°C, 260°C, 280°C, 280°C, 270°C, 260°C, 260°C, 270°C, 290°C, and 320°C, respectively.

10. Use of the highly clean conductive enhanced modified polyphenylene ether material according to any one of claims 1 to 6 in the preparation of an IC tray.

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