CN116102837A - Preparation method and device of modified polytetrafluoroethylene composite material - Google Patents
Preparation method and device of modified polytetrafluoroethylene composite material Download PDFInfo
- Publication number
- CN116102837A CN116102837A CN202211734023.6A CN202211734023A CN116102837A CN 116102837 A CN116102837 A CN 116102837A CN 202211734023 A CN202211734023 A CN 202211734023A CN 116102837 A CN116102837 A CN 116102837A
- Authority
- CN
- China
- Prior art keywords
- modified
- polytetrafluoroethylene
- powder
- composite material
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 97
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 97
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 97
- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 66
- 239000000945 filler Substances 0.000 claims abstract description 40
- 238000005245 sintering Methods 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000003607 modifier Substances 0.000 claims abstract description 13
- 239000011265 semifinished product Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 238000007493 shaping process Methods 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- SKWZHINXPDOQDF-UHFFFAOYSA-N disilanyl(ethenyl)silane Chemical compound [SiH3][SiH2][SiH2]C=C SKWZHINXPDOQDF-UHFFFAOYSA-N 0.000 claims description 2
- 229940089951 perfluorooctyl triethoxysilane Drugs 0.000 claims description 2
- AVYKQOAMZCAHRG-UHFFFAOYSA-N triethoxy(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)silane Chemical compound CCO[Si](OCC)(OCC)CCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F AVYKQOAMZCAHRG-UHFFFAOYSA-N 0.000 claims description 2
- 238000007781 pre-processing Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 14
- 238000004321 preservation Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/006—Pressing and sintering powders, granules or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/02—Moulding by agglomerating
- B29C67/04—Sintering
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/28—Nitrogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
- C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5425—Silicon-containing compounds containing oxygen containing at least one C=C bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/28—Nitrogen-containing compounds
- C08K2003/282—Binary compounds of nitrogen with aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of composite materials, in particular to a preparation method and a device of a modified polytetrafluoroethylene composite material; pre-treating polytetrafluoroethylene particles and a heat conducting filler to obtain polytetrafluoroethylene powder and a filler solution; mixing a modifier, the filler solution and the polytetrafluoroethylene powder to obtain a modified solution; the method comprises the steps of extracting and drying the modified solution to obtain modified powder, collecting the modified powder, and pressing and sintering to obtain the modified polytetrafluoroethylene composite material.
Description
Technical Field
The invention relates to the technical field of composite material preparation, in particular to a preparation method and a device of a modified polytetrafluoroethylene composite material.
Background
Polytetrafluoroethylene is commonly called as "plastic king", is a high molecular compound formed by polymerizing tetrafluoroethylene, and has excellent chemical stability, corrosion resistance, sealing property, high lubrication non-tackiness, electrical insulation property and good aging resistance; the plastic is used as engineering plastic, can be made into polytetrafluoroethylene tubes, rods, belts, plates, films and the like, and is generally applied to corrosion-resistant pipelines, containers, pumps, valves, radar manufacturing, high-frequency communication equipment, radio equipment and the like with higher performance requirements.
At present, the common modification mode for polytetrafluoroethylene is filling modification, the modification cost is low, the technology is relatively mature, the wear resistance of the polytetrafluoroethylene can be improved to a certain extent through filling modification for polytetrafluoroethylene, the polytetrafluoroethylene is corrosion-resistant, and the modified polytetrafluoroethylene material is suitable for manufacturing polytetrafluoroethylene heat exchangers, however, the conventional modified polytetrafluoroethylene material belongs to a poor heat conductor, and the use of the modified polytetrafluoroethylene material in the heat exchange field is limited.
Disclosure of Invention
The invention aims to provide a preparation method and a preparation device of a modified polytetrafluoroethylene composite material, and aims to solve the problem that the existing modified polytetrafluoroethylene composite material belongs to a poor conductor and is limited to be used in the field of heat exchange.
In order to achieve the above object, in a first aspect, the present invention provides a method and an apparatus for preparing a modified polytetrafluoroethylene composite material, comprising the steps of:
pre-treating polytetrafluoroethylene particles and a heat conducting filler to obtain polytetrafluoroethylene powder and a filler solution;
mixing a modifier, the filler solution and the polytetrafluoroethylene powder to obtain a modified solution;
and extracting and drying the modified solution to obtain modified powder, and collecting the modified powder for pressing and sintering to obtain the modified polytetrafluoroethylene composite material.
Wherein, the polytetrafluoroethylene particles and the heat conducting filler are pretreated to obtain polytetrafluoroethylene powder and a specific mode of filler solution:
grinding polytetrafluoroethylene particles to prepare powder, and obtaining polytetrafluoroethylene powder;
and mixing the heat conducting filler with an alcohol solvent to obtain the filler solution.
The heat conducting filler is inorganic heat conducting filler and comprises one or more of molybdenum disulfide, graphene, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide.
Wherein the modifier comprises vinyl trisilane and perfluorooctyl triethoxysilane.
The specific method for preparing the modified polytetrafluoroethylene composite material comprises the following steps of extracting and drying the modified solution to obtain modified powder, and collecting the modified powder for pressing and sintering, wherein the specific method comprises the following steps of:
extracting the modified solution, and drying at high temperature to obtain modified powder;
collecting the modified powder, pressing, and cutting based on a specified size to obtain a semi-finished product;
and sintering the semi-finished product to obtain the modified polytetrafluoroethylene composite material.
Wherein, the semi-finished product is sintered to obtain the modified polytetrafluoroethylene composite material in the specific mode:
sintering the semi-finished product to obtain a high Wen Fuwei material;
and taking out the high-temperature reset material to cool and dissipate heat, so as to obtain the modified polytetrafluoroethylene composite material.
In a second aspect, the invention also provides a preparation device of the modified polytetrafluoroethylene composite material, which comprises a crushing module, a mixing module, a shaping module and a processing module, wherein the crushing module, the mixing module, the shaping module and the processing module are sequentially connected;
the crushing module is used for crushing and grinding polytetrafluoroethylene particles to obtain polytetrafluoroethylene powder;
the mixing module is used for mixing the polytetrafluoroethylene powder, the modifier and the filler solution to prepare the modified solution;
the shaping module is used for drying the modified solution to obtain modified powder and pressing the modified powder;
and the processing module is used for sintering the pressed modified powder to obtain the modified polytetrafluoroethylene composite material.
According to the preparation method and the device of the modified polytetrafluoroethylene composite material, polytetrafluoroethylene particles and a heat-conducting filler are pretreated to obtain polytetrafluoroethylene powder and a filler solution; mixing a modifier, the filler solution and the polytetrafluoroethylene powder to obtain a modified solution; the method comprises the steps of extracting and drying the modified solution to obtain modified powder, collecting the modified powder, and pressing and sintering to obtain the modified polytetrafluoroethylene composite material.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for preparing a modified polytetrafluoroethylene composite material.
Fig. 2 is a flow chart of a specific manner of pre-treating polytetrafluoroethylene particles and thermally conductive filler to obtain polytetrafluoroethylene powder and filler solution.
FIG. 3 is a flow chart of a specific manner of extracting and drying the modified solution to obtain a modified powder, collecting the modified powder, and pressing and sintering to obtain a modified polytetrafluoroethylene composite material.
Fig. 4 is a schematic connection diagram of a device for preparing a modified polytetrafluoroethylene composite material provided by the invention.
In the figure: 1-crushing module, 2-mixing module, 3-shaping module, 4-processing module, 5-drying unit, 6-pressing unit, 7-sintering unit and 8-cooling unit.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 1 to 3, in a first aspect, the present invention provides a method for preparing a modified polytetrafluoroethylene composite material, comprising the following steps:
s1, pre-treating polytetrafluoroethylene particles and a heat-conducting filler to obtain polytetrafluoroethylene powder and a filler solution;
specifically, the heat conducting filler is an inorganic heat conducting filler and comprises one or more of molybdenum disulfide, graphene, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide, and the average particle size of the inorganic heat conducting filler is 10-100 mu m; the mass of the inorganic heat conduction filler is 0.25-1.0% of the mass of polytetrafluoroethylene.
The specific mode is as follows:
s11, grinding polytetrafluoroethylene particles to prepare powder, and obtaining polytetrafluoroethylene powder;
specifically, polytetrafluoroethylene particles are milled to enable polytetrafluoroethylene to react with a subsequent modifier and the filler solution more thoroughly.
And S12, mixing the heat-conducting filler with an alcohol solvent to obtain the filler solution.
Specifically, the mass of the alcohol solvent is 1-4 times of the total mass of the surface modifier, the inorganic heat conducting filler and the polytetrafluoroethylene.
S2, mixing a modifier, the filler solution and the polytetrafluoroethylene powder to obtain a modified solution;
s3, extracting and drying the modified solution to obtain modified powder, and collecting the modified powder for pressing and sintering to obtain the modified polytetrafluoroethylene composite material.
The specific mode is as follows:
s31, extracting the modified solution, and drying at a high temperature to obtain modified powder;
s32, collecting the modified powder, pressing, and cutting based on a specified size to obtain a semi-finished product;
specifically, the designated size is a size determined according to the requirement, and can be changed by itself.
And S33, sintering the semi-finished product to obtain the modified polytetrafluoroethylene composite material.
The specific mode is as follows:
s331, sintering the semi-finished product to obtain a high Wen Fuwei material;
specifically, the sintering includes sequentially performing a first sintering, a second sintering, and a third sintering; the temperature of the first sintering is 200-220 ℃, the heat preservation time is 0.5-1.0 h, the temperature of the second sintering is 300-330 ℃, the heat preservation time is 0.5-1.0 h, the temperature of the third sintering is 370-400 ℃, and the heat preservation time is 1.0-1.5 h.
And S332, taking out the high-temperature resetting material to cool and dissipate heat, and obtaining the modified polytetrafluoroethylene composite material.
Specifically, the cooling and radiating comprises a first cooling, a second cooling and a third cooling which are sequentially carried out; the temperature of the first cooling is 300-330 ℃, the heat preservation time is 0.5-1.0 h, the temperature of the second cooling is 200-220 ℃, the heat preservation time is 0.5-1.0 h, and the temperature of the third cooling is room temperature.
Referring to fig. 4, in a second aspect, the present invention further provides a modified polytetrafluoroethylene composite material preparation apparatus, which includes a crushing module 1, a mixing module 2, a shaping module 3, and a processing module 4, where the crushing module 1, the mixing module 2, the shaping module 3, and the processing module 4 are sequentially connected;
the crushing module 1 is used for crushing and grinding polytetrafluoroethylene particles to obtain polytetrafluoroethylene powder;
the mixing module 2 is used for mixing the polytetrafluoroethylene powder, the modifier and the filler solution to prepare the modified solution;
the shaping module 3 is used for drying the modifying solution to obtain modified powder and pressing the modified powder;
and the processing module 4 is used for sintering the pressed modified powder to obtain the modified polytetrafluoroethylene composite material.
In this embodiment, the polytetrafluoroethylene powder is prepared by pulverizing and grinding polytetrafluoroethylene particles by the pulverizing module 1, the modified solution is prepared by mixing the polytetrafluoroethylene powder, the modifier and the filler solution by the mixing module 2, the modified solution is dried by the shaping module 3 to obtain modified powder, the modified powder is pressed to obtain a semi-finished product, and finally the semi-finished product is sintered by the processing module 4 and subjected to cooling treatment to obtain the modified polytetrafluoroethylene composite material.
Further, the shaping module 3 comprises a drying unit 5 and a pressing unit 6, and the drying unit 5 is connected with the pressing unit 6;
the drying unit 5 is used for drying the modified solution to obtain modified powder;
the pressing unit 6 is used for pressing the modified powder.
In this embodiment, the drying unit 5 of the shaping module 3 dries the modified solution to obtain the modified powder, and the pressing unit 6 presses the modified powder to obtain the semi-finished product.
Further, the processing module 4 comprises a sintering unit 7 and a cooling unit 8, and the sintering unit 7 and the cooling unit 8 are connected;
the sintering unit 7 is used for sintering the modified powder to obtain the high-temperature reset material;
and the cooling unit 8 is used for cooling the high-temperature resetting material to obtain the modified polytetrafluoroethylene composite material.
In this embodiment, the sintering unit 7 of the processing module 4 sinters the modified powder to obtain the high-temperature resetting material, and the cooling unit 8 cools the high-temperature resetting material to obtain the modified polytetrafluoroethylene composite material.
The above disclosure is only illustrative of a preferred embodiment of a method and apparatus for preparing a modified polytetrafluoroethylene composite material according to the present invention, but it is not intended to limit the scope of the invention.
Claims (7)
1. The preparation method of the modified polytetrafluoroethylene composite material is characterized by comprising the following steps of:
pre-treating polytetrafluoroethylene particles and a heat conducting filler to obtain polytetrafluoroethylene powder and a filler solution;
mixing a modifier, the filler solution and the polytetrafluoroethylene powder to obtain a modified solution;
and extracting and drying the modified solution to obtain modified powder, and collecting the modified powder for pressing and sintering to obtain the modified polytetrafluoroethylene composite material.
2. The method for preparing the modified polytetrafluoroethylene composite material according to claim 1, wherein,
the specific mode of preprocessing polytetrafluoroethylene particles and heat conducting filler to obtain polytetrafluoroethylene powder and filler solution is as follows:
grinding polytetrafluoroethylene particles to prepare powder, and obtaining polytetrafluoroethylene powder;
and mixing the heat conducting filler with an alcohol solvent to obtain the filler solution.
3. The method for preparing the modified polytetrafluoroethylene composite material according to claim 1, wherein,
the heat conducting filler is inorganic heat conducting filler and comprises one or more of molybdenum disulfide, graphene, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide.
4. The method for preparing the modified polytetrafluoroethylene composite material according to claim 1, wherein,
the modifier comprises vinyl trisilane and perfluorooctyl triethoxysilane.
5. The method for preparing the modified polytetrafluoroethylene composite material according to claim 1, wherein,
the specific mode of obtaining the modified polytetrafluoroethylene composite material is that the modified powder is obtained by extracting and drying the modified solution, and the modified powder is collected for pressing and sintering:
extracting the modified solution, and drying at high temperature to obtain modified powder;
collecting the modified powder, pressing, and cutting based on a specified size to obtain a semi-finished product;
and sintering the semi-finished product to obtain the modified polytetrafluoroethylene composite material.
6. The method for preparing a modified polytetrafluoroethylene composite material according to claim 5, wherein,
the semi-finished product is sintered to obtain the modified polytetrafluoroethylene composite material in a specific mode:
sintering the semi-finished product to obtain a high Wen Fuwei material;
and taking out the high-temperature reset material to cool and dissipate heat, so as to obtain the modified polytetrafluoroethylene composite material.
7. A preparation device of modified polytetrafluoroethylene composite material is applied to the preparation method of modified polytetrafluoroethylene composite material as set forth in claim 1, and is characterized in that,
the device comprises a crushing module, a mixing module, a shaping module and a processing module, wherein the crushing module, the mixing module, the shaping module and the processing module are sequentially connected;
the crushing module is used for crushing and grinding polytetrafluoroethylene particles to obtain polytetrafluoroethylene powder;
the mixing module is used for mixing the polytetrafluoroethylene powder, the modifier and the filler solution to prepare the modified solution;
the shaping module is used for drying the modified solution to obtain modified powder and pressing the modified powder;
and the processing module is used for sintering the pressed modified powder to obtain the modified polytetrafluoroethylene composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211734023.6A CN116102837A (en) | 2022-12-30 | 2022-12-30 | Preparation method and device of modified polytetrafluoroethylene composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211734023.6A CN116102837A (en) | 2022-12-30 | 2022-12-30 | Preparation method and device of modified polytetrafluoroethylene composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116102837A true CN116102837A (en) | 2023-05-12 |
Family
ID=86255573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211734023.6A Pending CN116102837A (en) | 2022-12-30 | 2022-12-30 | Preparation method and device of modified polytetrafluoroethylene composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116102837A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199330A (en) * | 2010-12-24 | 2011-09-28 | 东莞市新志密封技术有限公司 | Method for preparing modified Teflon composite material and its product |
| CN103275448A (en) * | 2013-06-25 | 2013-09-04 | 孟红琳 | Preparation method of modified packing ion enhanced polytetrafluoroethylene composite |
| CN113024976A (en) * | 2021-03-09 | 2021-06-25 | 河北中科同创科技发展有限公司 | Modified polytetrafluoroethylene composite material and preparation method thereof |
-
2022
- 2022-12-30 CN CN202211734023.6A patent/CN116102837A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199330A (en) * | 2010-12-24 | 2011-09-28 | 东莞市新志密封技术有限公司 | Method for preparing modified Teflon composite material and its product |
| CN103275448A (en) * | 2013-06-25 | 2013-09-04 | 孟红琳 | Preparation method of modified packing ion enhanced polytetrafluoroethylene composite |
| CN113024976A (en) * | 2021-03-09 | 2021-06-25 | 河北中科同创科技发展有限公司 | Modified polytetrafluoroethylene composite material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112175238B (en) | Preparation method of boron nitride nanosheet-carbon nanotube heat-conducting filler and heat-conducting composite material | |
| CN104425823B (en) | A kind of artificial graphite cathode material for lithium ion batteries and preparation method thereof | |
| CN104762498A (en) | Hot isostatic pressing preparation method of high-density molybdenum-copper alloy | |
| CN101942122B (en) | Heat-conduction natural rubber composite and preparation method thereof | |
| CN107325787B (en) | Hollow carbon nano-particles and wave-absorbing material prepared from same | |
| CN110512109A (en) | A kind of preparation method of graphene enhancing titanium composite material | |
| CN107501610A (en) | A kind of composite heat interfacial material based on boron nitride and preparation method thereof | |
| CN101831180A (en) | Preparation method of heat-conducting insulating silicon rubber composite sheet | |
| CN203719484U (en) | Soaking plate based on artificial graphite film | |
| CN116102837A (en) | Preparation method and device of modified polytetrafluoroethylene composite material | |
| CN104087776B (en) | Carbon dope strengthens the preparation method of W-Cu composite | |
| CN101518867B (en) | Integral die forming manufacturing method for graphite-base composite material radiator | |
| CN104987073A (en) | High-hardness high-abrasion-resistance motor carbon brush material mixed with cubic boron nitride and preparation method of material | |
| CN112300521B (en) | High-thermal-conductivity polytetrafluoroethylene composite material and preparation method and application thereof | |
| CN110760099A (en) | Preparation method of graphene-boron nitride nanotube heat-conducting filler and oriented heat-conducting composite material | |
| CN105036747A (en) | Nano-hydroxyapatite-doped high-density motor carbon brush material and preparation method thereof | |
| CN104120309B (en) | Metal-negative thermal expansion material composite material and preparation method thereof | |
| CN106381432A (en) | Manufacture method for high-thermal-conductivity diamond/multi-metal composite material | |
| CN111004461A (en) | Heat-conducting polytetrafluoroethylene sheet with stable size and preparation method thereof | |
| CN112853144A (en) | Preparation method of diamond/graphene/metal composite material | |
| CN105140752A (en) | Highly-compact highly-conductive motor carbon brush material blended with lithium iron phosphate and preparation method of material | |
| CN103938012A (en) | Carbon-based room-temperature magnetic refrigeration composite and preparation method thereof | |
| CN107880548A (en) | A kind of computer conductive heat conducting material formula and its preparation technology | |
| CN110803930A (en) | High-thermal-conductivity and high-electric-conductivity sulfonated graphene-based composite film and preparation method thereof | |
| CN111002688A (en) | Preparation method of flexible foldable insulating heat dissipation material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |