CN101851383B - Conductive polymer composite material and preparation method thereof - Google Patents
Conductive polymer composite material and preparation method thereof Download PDFInfo
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- CN101851383B CN101851383B CN2010101960113A CN201010196011A CN101851383B CN 101851383 B CN101851383 B CN 101851383B CN 2010101960113 A CN2010101960113 A CN 2010101960113A CN 201010196011 A CN201010196011 A CN 201010196011A CN 101851383 B CN101851383 B CN 101851383B
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Abstract
The invention relates to a conductive polymer composite material and a preparation method thereof. The conductive polymer composite material comprises the following components in weight percentage: 80-95% of polyfluortetraethylene and 5-20% of conductive filler. The grain size of the polyfluortetraethylene as a raw material is 0.1-500 micrometers; and the conductive filler is one of conductive carbon black powder and graphite powder or the mixture thereof, wherein the grain size of the conductive carbon black powder is 10-200 nanometers, and the grain size of the graphite powder is 20-5000 nanometers. The preparation method comprises the following steps of: a. mixing and ball-milling conductive fillers and an alkaline aqueous solution; b. stirring and heating a polyfluortetraethylene emulsion; c. adding the aqueous solution of the conductive filler in the polyfluortetraethylene emulsion and then continuously stirring; and d. filtering the mixture of the polyfluortetraethylene and the conductive filler, pushing the settled and dried mixture into a thin long-strip shape, repeatedly and thermally rolling the mixture to form a strip-shaped belt, and then carrying out thermal treatment to obtain the conductive polymer composite material. The composite material has the characteristics of wide temperature range, easy adjustment of electric conductivity, stable mechanical property and the like.
Description
[technical field]
The present invention relates to polymer composite, particularly relate to a kind of conductive polymer composite and preparation method thereof with conducting function.
[background technology]
Plastics are known by people as a kind of insulating material.And, expanding himself performance in order to change the attribute of plastics, people expand to the electro-conductive material field with it, develop the novel material with conductivity.Conductive plastics is a kind of macromolecular material, is active research development field very in the world at present, and the pure laboratory study from the initial stage develops into the applied research stage, becomes electronic material of new generation.
Tetrafluoroethylene is a kind of widely used macromolecular material, and it has excellent chemical stability, erosion resistance, stopping property, high lubricated not viscosity, electrical insulating property and good anti-aging endurance, heatproof excellence.Though tetrafluoroethylene has the performance of above-mentioned excellence, it does not have conducting function, thereby its Application Areas still has certain limitation.
[summary of the invention]
The present invention is intended to make full use of the excellent properties of tetrafluoroethylene, and expands its Application Areas, and a kind of broad application temperature range is provided, and electric conductivity is easily adjusted, the conductive polymer composite that the mechanical property of materials is stable.
The present invention also aims to provide the preparation method of this conductive polymer composite.
For achieving the above object, the invention provides a kind of conductive polymer composite, its weight percent consists of:
Tetrafluoroethylene 80%～95%;
Conductive filler material 5%～20%.
The preferred weight percent of this conductive polymer composite consists of:
Tetrafluoroethylene 85%～90%;
Conductive filler material 10%～15%.
The particle diameter of tetrafluoroethylene raw material is 0.1～500 micron.
Conductive filler material is a kind of or its mixture in conductive carbon black powder, the Graphite Powder 99.
The particle diameter of conductive carbon black powder is 10～200 nanometers.
The particle diameter of Graphite Powder 99 is 20～5000 nanometers.
The invention provides the preparation method of this matrix material, this method comprises the steps:
A, be that 5～20% alkaline aqueous solution mixes mutually by 1: 5～10 weight ratio, with mixture ball milling 4～12 hours with conductive filler material and weight percent concentration;
B, take by weighing ptfe emulsion,, be heated 60～80 ℃ in the time of stirring ptfe emulsion electric mixer high-speed stirring in the ratio of conductive filler material and tetrafluoroethylene;
C, the aqueous solution of conductive filler material in the step (a) is joined in the ptfe emulsion in the stirring, continue again to stir 0.2～1 hour;
D, with the mixture filtration of tetrafluoroethylene in the step (c) with conductive filler material, after the temperature more than 100 ℃ sinks to the bottom oven dry, be forced into thin strip in the temperature more than 50 ℃, through forming the bar shaped ribbon after the hot roll extrusion repeatedly, through heat-treated more than 200 ℃, obtain conductive polymer composite again.
Described ptfe emulsion is the decentralized ptfe emulsion of mass percent concentration less than 50wt%, and its solvent is a water.
Contribution of the present invention is, it is with the composite functional material of tetrafluoroethylene exploitation becoming with conducting function, can not only give full play to the deep-etching of strong oxidizers such as the acid of tetrafluoroethylene self salt tolerant, nitric acid, chloroazotic acid, sulfuric acid, hydrofluoric acid and multiple organic solvent, and can greatly expand its Application Areas, tetrafluoroethylene conduction interchanger and pipeline with this matrix material production, improved the heat transfer coefficient of product, having solved in the pipe-line transportation material process friction and having produced an electrostatic difficult problem, and product can be between-190 ℃～250 ℃ steady operation.Matrix material broad application temperature range of the present invention, electric conductivity is easily adjusted, and the mechanical property of materials is stable, and the preparation method is simple, and is cheap, and process stabilizing is with short production cycle.
[embodiment]
The following example is to further explanation of the present invention and explanation, and the present invention is not constituted any limitation.
Powdered graphite 1kg and the median size that 2: 1 by weight percentage with median size was 250 nanometers is after the conductive carbon black 0.5kg of 100 nanometers mixes mutually, to form conductive filler material.This conductive filler material is joined in the NaOH aqueous solution that 10.5kg concentration is 8wt%, mixture ball milling in ball mill was mixed 6 hours.By conductive filler material and tetrafluoroethylene weight ratio is to measure the ptfe emulsion of respective volume at 1: 9, getting mass percent concentration is the ptfe emulsion 33.75kg of 40wt%, this emulsion is heated to 70 ℃, carry out violent mechanical stirring in the heat-processed, the stirring-head rotating speed is 750 rev/mins.Conductive filler material slurry behind the ball milling is joined in the ptfe emulsion that is stirring, continue to stir after 15 minutes, with the said mixture strainer filtering, after 120 ℃ temperature thorough drying, in the pushing machine, be forced into the bar of diameter 7mm, this bar is rolled into the bar shaped ribbon that thickness is 0.5mm through roller press, again through the thermal treatment of 220 ℃ of temperature, promptly obtain to have the matrix material of conducting function, after tested, its surface resistivity is 2.4S/cm.
Claims (2)
1. the preparation method of a conductive polymer composite, its feature is stored in, and it comprises the steps:
A, be that 5～20% alkaline aqueous solution mixes mutually by 1: 5～10 weight ratio, with mixture ball milling 4～12 hours with conductive filler material and weight percent concentration;
B, take by weighing ptfe emulsion,, be heated 60～80 ℃ in the time of stirring ptfe emulsion electric mixer high-speed stirring in the ratio of conductive filler material and tetrafluoroethylene;
C, the aqueous solution of conductive filler material in the step (a) is joined in the ptfe emulsion in the stirring, continue again to stir 0.2～1 hour;
D, with the mixture filtration of tetrafluoroethylene in the step (c) with conductive filler material, after the temperature more than 100 ℃ sinks to the bottom oven dry, be forced into thin strip in the temperature more than 50 ℃, through forming the bar shaped ribbon after the hot roll extrusion repeatedly, again through heat-treated more than 200 ℃, obtain conductive polymer composite, the weight percent of described conductive polymer composite consists of: tetrafluoroethylene 80%～95%, conductive filler material 5%～20%.
2. the preparation method of conductive polymer composite according to claim 1 is characterized in that described ptfe emulsion is the decentralized ptfe emulsion of mass percent concentration less than 50wt%, and its solvent is a water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101960113A CN101851383B (en) | 2010-06-09 | 2010-06-09 | Conductive polymer composite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101960113A CN101851383B (en) | 2010-06-09 | 2010-06-09 | Conductive polymer composite material and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101851383A CN101851383A (en) | 2010-10-06 |
| CN101851383B true CN101851383B (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101960113A Expired - Fee Related CN101851383B (en) | 2010-06-09 | 2010-06-09 | Conductive polymer composite material and preparation method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604281A (en) * | 2012-02-14 | 2012-07-25 | 南昌航空大学 | Preparation method of crosslinking-free polymer-based high-temperature PTC (positive temperature coefficient) material |
| EP2871697A4 (en) * | 2012-07-06 | 2016-05-11 | Daikin Ind Ltd | Sheet, electrode and fuel cell |
| CN105504612A (en) * | 2016-02-01 | 2016-04-20 | 天津市天塑科技集团有限公司 | Preparation method of anti-static polytetrafluoroethylene thin film |
| CN109401148A (en) * | 2018-11-12 | 2019-03-01 | 佛山市纳博工业设备有限公司 | A kind of resin conductive ring of high-pressure electrostatic spray gun and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481483A (en) * | 2009-02-12 | 2009-07-15 | 广州市东泓橡塑制品有限公司 | Antistatic teflon film and preparation thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481483A (en) * | 2009-02-12 | 2009-07-15 | 广州市东泓橡塑制品有限公司 | Antistatic teflon film and preparation thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张永强等."石墨对聚四氟乙烯（PTFE）抗静电性能的影响".《热加工工艺技术与材料研究》.2009,(第11期),71－73. |
| 张永强等."石墨对聚四氟乙烯(PTFE)抗静电性能的影响".《热加工工艺技术与材料研究》.2009,(第11期),71-73. * |
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| CN101851383A (en) | 2010-10-06 |
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Granted publication date: 20111130 Termination date: 20160609 |