CN100589210C - Conductance compound material and preparing process - Google Patents
Conductance compound material and preparing process Download PDFInfo
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- CN100589210C CN100589210C CN200810014872A CN200810014872A CN100589210C CN 100589210 C CN100589210 C CN 100589210C CN 200810014872 A CN200810014872 A CN 200810014872A CN 200810014872 A CN200810014872 A CN 200810014872A CN 100589210 C CN100589210 C CN 100589210C
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Abstract
The present invention relates to a conductive composite material and a manufacture art thereof, in particular to a mixed epoxy resin and phenolic resin/graphite matrix conductive composite material and a manufacture art thereof. The mass ratio of the material formula is as follows: graphite material of 70 to 90 percent; epoxy resin of 0 to 24 percent; phenolic resin of 30 to 2 percent. The manufacture art is as follows: (1) preparing the epoxy resin, the phenolic resin and the graphite according to the mass percent; (2) mixing and grinding the epoxy resin, the phenolic resin and the graphite to obtain refined and even mixed powder, the granularity is between 100 meshes and 180 meshes; (3) packing the mixed powder into a pressing molding mold; heat-pressing and sintering to mold; the molding temperature is from 180 to 310 DEG C; the molding pressure is from 10 to 40 MPa; and the temperature pressure keeping time is from 30 to 120 min. The material is mainly used for producing bipolar plates of proton exchange membrane fuel cells and other electrodes. In the condition that the conductivity rate and corrosion resistant capacity are ensured, the conductive composite material has comparatively high strength and density. The manufacture art of the conductive composite material is simple, energy-saving, environmentally friendly, low in cost and wide in application range.
Description
One, technical field:
The invention belongs to conducing composite material and preparation technology field thereof, especially relate to epoxy, phenolic aldehyde hybrid resin/graphite based conducting composite material and preparation technology thereof.
Two, background technology:
Conducing composite material conducts electricity very well owing to it has concurrently, corrosion-resistant, intensity advantages of higher, is widely used in products such as brush, electrode, fuel battery double plates.Proton Exchange Membrane Fuel Cells is a kind of fuel cell that utilizes hydrogen and oxygen reaction to discharge electric energy of present comparative maturity.China classified one of country " 95 " key research project as with " fuel cell technology " in 1997, and wherein Proton Exchange Membrane Fuel Cells is main scientific research project, was considered to the cleaning of 21 century first-selection, Blast Furnace Top Gas Recovery Turbine Unit (TRT) efficiently.And wherein main element---bipolar plates not only influences the performance of battery, and has occupied 60%～70% of battery cost.Using at present more is graphite bi-polar plate, adopts the method for machining that graphite sheet is processed into the bipolar plates with special flow road shape during fabrication usually, but long processing time, workload is big and percent defective is higher.Therefore, realize the industrialization of Proton Exchange Membrane Fuel Cells, reduce its manufacturing expense, good bipolar plate material and the forming method of essential employing.
The resin/graphite based composites for prepare low cost, the high-performance bipolar plates provides a new research direction, used resin mainly contains thermoplastic resin and thermosetting resin.The thermoplas tic resin composite is more crisp relatively, and the bipolar plates of making needs bigger thickness could guarantee mechanical property, can increase the quality of bipolar plates like this, and cost is increased, and also is unfavorable for the installation of later stage bipolar plates, and the fuel cell volume is strengthened; And thermoset ting resin composite now generally adopts the tackifying resin wet method to grind mixing, needs to add solvent in the mixed process, high temperature cabonization again after the moulding, and the technology more complicated causes manufacturing cost to raise.
Three, summary of the invention
The objective of the invention is to overcome deficiency and defective that present prior art and material exist, provide a kind of good conductivity, corrosion resistance is strong, bending strength is high, gas barrier property is good, application adaptation face width and the simple graphite based conducting composite material of preparation technology.
Technical scheme of the present invention is as follows:
Good electrical conductivity, thermal conductivity and the corrosion resistance of utilizing graphite material to have, and the good caking property that epoxy resin and phenolic resins had and with the compatibility of graphite material, a kind of epoxy, phenolic aldehyde hybrid resin/graphite based conducting composite material are proposed.The material prescription mass ratio is:
Graphite material: 70-90%, epoxy resin: 0-24%, phenolic resins: 30-2%.
Optimal material prescription quality ratio is: graphite material: 80-90%, epoxy resin: 1-16%, phenolic resins: 18-2%.
Graphite material, epoxy resin and phenolic resins are Powdered.
The preparation technology of epoxy proposed by the invention, phenolic aldehyde hybrid resin/graphite conducting composite material is:
(1) get the raw materials ready by mass percentage epoxy resin, phenolic resins and graphite;
(2) mix and to grind epoxy resin, phenolic resins and graphite, obtain refinement, mixed powder uniformly, granularity at 100 orders between 180 orders; Crushing process is that dry mixed grinds, and does not add any solvent, adopts methods such as roll extrusion mill or impact grinding or ball milling or vibration milling or airflow milling or stirring mill;
(3) mixed powder is packed in the compression molding mould, Thermocompressed sintering and forming, forming temperature are 180-310 ℃, and briquetting pressure is 10-40MPa, and the heat-insulation pressure keeping time is 30-120min.
Conducing composite material of the present invention has following characteristic: 1. the normal temperature volume conductance is 25-285S/cm; 2. the normal temperature bending strength is 30-61.6MPa.Above performance obviously is better than the performance of existing resin/graphite based conductive composite material at present.
This graphite based conducting composite material is mainly used in makes dual polar plates of proton exchange membrane fuel cell and other electrode, guaranteeing under its conductivity and the corrosion proof situation, have higher intensity and density simultaneously, every performance index all are significantly improved than existing graphite bi-polar plate; Preparation technology of the present invention is simple, and energy-saving and environmental protection are with low cost, wide accommodation.
Four, embodiment
Embodiment 1:
Material composition: graphite 89wt%, epoxy resin 8wt%, phenolic resins 3wt%; Adopt ball milling to mix and grind, granularity is that 100 orders are to 180 orders; The mould heat pressure of packing into, briquetting pressure: 30MPa, forming temperature: 250 ℃, curing time: 100min.
Prepared conducing composite material performance is as follows:
Bending strength: 45.6MPa; Conductivity: 285S/cm.
Embodiment 2:
Material composition: graphite 85wt%, epoxy resin 0wt%, phenolic resins 15wt%; Adopt ball milling to mix and grind, granularity is that 100 orders are to 160 orders; The mould heat pressure of packing into, briquetting pressure: 40MPa, forming temperature: 260 ℃, curing time: 90min.
Prepared conducing composite material performance is as follows:
Bending strength: 61.6MPa; Conductivity: 142S/cm.
Embodiment 3:
Material composition: graphite 83wt%, epoxy resin 12.5wt%, phenolic resins 4.5wt%; Adopt ball milling to mix and grind, granularity is that 100 orders are to 180 orders; The mould heat pressure of packing into, briquetting pressure: 30MPa, forming temperature: 250 ℃, curing time: 100min.
Prepared conducing composite material performance is as follows:
Bending strength: 56MPa; Conductivity: 162S/cm.
Embodiment 4:
Material composition: graphite 88wt%, epoxy resin 9.3wt%, phenolic resins 2.7wt%; Adopt the roll extrusion mill to mix and grind, granularity is that 100 orders are to 140 orders; The mould heat pressure of packing into, briquetting pressure: 25MPa, forming temperature: 300 ℃, curing time: 90min.
Prepared conducing composite material performance is as follows:
Bending strength: 52.48MPa; Conductivity: 187.88S/cm.
Embodiment 5:
Material composition: graphite 82wt%, epoxy resin 13wt%, phenolic resins 5wt%; Adopt ball milling to mix and grind, granularity is that 100 orders are to 180 orders; The mould heat pressure of packing into, briquetting pressure: 25MPa, forming temperature: 200 ℃, curing time: 70min.
Prepared conducing composite material performance is as follows:
Bending strength: 39.26MPa; Conductivity: 233S/cm.
Claims (3)
1, a kind of conducing composite material is a matrix with graphite, is binding agent with epoxy resin, phenolic resins, it is characterized in that the material prescription mass ratio is: graphite material 80-90%, epoxy resin 1-16%, phenolic resins 18-2%.
2, implement the preparation technology of a kind of conducing composite material of claim 1, it is characterized by:
(1) get the raw materials ready by mass percentage epoxy resin, phenolic resins and graphite;
(2) mix and to grind epoxy resin, phenolic resins and graphite, obtain refinement, mixed powder uniformly, granularity at 100 orders between 180 orders;
(3) mixed powder is packed in the compression molding mould, Thermocompressed sintering and forming, forming temperature are 180～310 ℃, and briquetting pressure is 10～40MPa, and the heat-insulation pressure keeping time is 30～120min.
3, the preparation technology of conducing composite material according to claim 2 is characterized in that described processing step (2) adopts dry process to mix and grinds, and does not add any solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810014872A CN100589210C (en) | 2008-03-26 | 2008-03-26 | Conductance compound material and preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810014872A CN100589210C (en) | 2008-03-26 | 2008-03-26 | Conductance compound material and preparing process |
Publications (2)
| Publication Number | Publication Date |
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| CN101252029A CN101252029A (en) | 2008-08-27 |
| CN100589210C true CN100589210C (en) | 2010-02-10 |
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| CN200810014872A Expired - Fee Related CN100589210C (en) | 2008-03-26 | 2008-03-26 | Conductance compound material and preparing process |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088819B (en) * | 2009-12-07 | 2012-09-05 | 耿世达 | Novel electronic circuit substrate and manufacturing process thereof |
| CN101986392B (en) * | 2010-05-25 | 2013-10-02 | 华东理工大学 | A conducting material and preparation method and use thereof |
| CN101942179B (en) * | 2010-09-10 | 2012-02-01 | 西北师范大学 | Polypyrrole-graphite nanosheet-epoxy resin conductive composite material and preparation thereof |
| CN103320072B (en) * | 2013-05-23 | 2015-02-25 | 苏州欢颜电气有限公司 | Graphite-based epoxy resin conductive adhesive and preparation method therefor |
| CN104671707A (en) * | 2015-01-26 | 2015-06-03 | 中国石油大学(华东) | Method for preparing graphite brush by taking molybdenum acid modified asphalt resin as adhesive |
| CN106448810A (en) * | 2016-09-08 | 2017-02-22 | 芜湖桑乐金电子科技有限公司 | Graphite slurry and preparation method therefor |
| CN107915462B (en) * | 2017-11-24 | 2020-07-07 | 安阳市佰士特异型石墨制品有限责任公司 | Floor heating material and preparation process thereof |
| CN109167072A (en) * | 2018-09-07 | 2019-01-08 | 米库玻璃纤维增强塑料泰州有限责任公司 | A kind of graphite bi-polar plate manufacturing process |
| CN113555578B (en) * | 2021-07-22 | 2024-10-15 | 浙江华熔科技有限公司 | Composite graphite material for fuel cell bipolar plate and preparation method thereof |
| CN114634176B (en) * | 2022-04-09 | 2023-05-05 | 中山名优照明科技有限公司 | Application process of graphite powder in radiator |
| CN114976096B (en) * | 2022-04-20 | 2024-03-26 | 同济大学 | Double-resin system composite graphite for fuel cell bipolar plate and preparation method and application thereof |
| CN116454307B (en) * | 2023-06-15 | 2023-08-22 | 江苏金亚隆科技有限公司 | Manufacturing method of composite graphite bipolar plate for fuel cell |
-
2008
- 2008-03-26 CN CN200810014872A patent/CN100589210C/en not_active Expired - Fee Related
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| 树脂－石墨系材料性能的研究. 龚季勤.炭素，第4期. 1988 |
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| CN101252029A (en) | 2008-08-27 |
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